Initial Commit

packages/api-stack/api/api-plugin-campaigns/src/context/context.md

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+# `context`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `context` module owns the Hono `ContextVariableMap` declaration-merge
+augmentation applied by `@suaveplan/api-plugin-campaigns`. Importing the
+module for its side effects (which the package root barrel does
+automatically) adds the typed slots the plugin's route handlers read with
+`c.get(...)`, eliminating the `as any` casts that pile up in untyped Hono
+middleware chains.
+
+In Chunk A the only slot the plugin commits to is `eventBus`, because
+that is the only context entry the no-op `onInit` placeholder would set if
+it had a body. Chunks B and C will extend the declaration with the
+repository handles (`campaignRepository`, `campaignSuppressionStore`,
+`deliveryEventStore`) once those classes exist; consumers do not need to
+re-import this module to pick the extensions up.
+
+## Features
+
+- Pure declaration-merge — zero runtime cost, zero bundle size.
+- Re-exports an empty value (`export {}`) so the module participates in
+  ES-module side-effect ordering without polluting the consumer's
+  namespace.
+- Slot type drawn from `@suaveplan/types` so the augmentation does not
+  drag in the api-plugin-campaigns implementation surface.
+
+## Usage: Basic
+
+```ts
+import { Hono } from "hono";
+import "@suaveplan/api-plugin-campaigns"; // also pulls this module via the root barrel
+
+const app = new Hono();
+app.get("/", (c) => {
+    const bus = c.get("eventBus");
+    bus.emit("campaign.read", { id: "x" });
+    return c.text("ok");
+});
+```
+
+## Usage: Advanced
+
+```ts
+import "@suaveplan/api-plugin-campaigns/plugin/plugin"; // ensures the augmentation
+import type { ContextVariableMap } from "hono";
+
+type EventBus = ContextVariableMap["eventBus"];
+```
+
+## API Reference
+
+- Adds `eventBus: EventBusLike` to Hono `ContextVariableMap`.
+- No runtime exports.
+
+## Implementation Notes
+
+Module augmentations must live in a file with at least one `export`
+statement to be picked up as a module rather than a script. The empty
+`export {}` at the bottom is the standard idiom; removing it would
+silently demote the file to a script and the `declare module "hono"`
+block would stop applying.
+
+Chunks B and C augment the same `ContextVariableMap` interface from
+their own context modules, relying on TypeScript declaration merging to
+union the slots together. That means agents working on later chunks
+never edit this file — they add new files with their own
+`declare module "hono"` blocks.

packages/api-stack/api/api-plugin-campaigns/src/context/context.ts

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+/**
+ * Hono `ContextVariableMap` module augmentation for
+ * `@suaveplan/api-plugin-campaigns`. Importing this module for side
+ * effects (which the package root barrel does automatically) reserves
+ * the slots the plugin's `onInit` middleware populates on every Hono
+ * request so route handlers can read them via `c.get(...)` with full
+ * typing.
+ *
+ * Chunk C adds the three repository slots (`campaignRepository`,
+ * `campaignSuppressionStore`, `deliveryEventStore`) alongside the
+ * `eventBus` baseline declared in Chunk A. Slots are typed as the
+ * structural store interfaces — `CampaignStore`,
+ * `CampaignSuppressionStore`, `DeliveryEventStore` — so route handlers
+ * stay agnostic of the concrete (in-memory vs. SurrealDB) backend.
+ */
+
+import type { CampaignStore } from "@suaveplan/campaigns";
+import type { DeliveryEventStore } from "@suaveplan/delivery-tracking";
+import type { EventBusLike } from "@suaveplan/types";
+import type { CampaignSuppressionStore } from "../repositories/suppression/suppression.types.js";
+
+declare module "hono" {
+    interface ContextVariableMap {
+        eventBus: EventBusLike;
+        campaignRepository: CampaignStore;
+        campaignSuppressionStore: CampaignSuppressionStore;
+        deliveryEventStore: DeliveryEventStore;
+    }
+}

packages/api-stack/api/api-plugin-campaigns/src/context/index.ts

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+import "./context.js";

packages/api-stack/api/api-plugin-campaigns/src/error-codes/error-codes.md

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+# `error-codes`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The error-codes module owns the stable `CAMPAIGNS_API.*` namespace used by
+every failure path inside `@suaveplan/api-plugin-campaigns`. Consumers
+branch on the string `code` value (rather than `instanceof` checks against
+private subclasses) so the namespace doubles as both an internal vocabulary
+and a public-API contract surface.
+
+This is the foundation module for the chunked migration. Chunk A registers
+only the codes that the foundation surface can actually throw; Chunks B
+(repositories) and C (routes) extend the same `defineCodes` call rather than
+introducing parallel namespaces. The intentional minimalism keeps coverage
+at 100% across the package boundary at every chunk milestone.
+
+## Features
+
+- `CAMPAIGNS_API_CODES` — frozen `defineCodes` registry mapping reason names
+  to `"CAMPAIGNS_API.<REASON>"` string values.
+- `CampaignsApiError` — concrete subclass of `SuaveplanError` with an
+  explicit public constructor delegating to `super`, plus a typed
+  `campaignsApiCode` field that narrows to `CampaignsApiErrorCode`.
+- `CampaignsApiErrorCode` — discriminated string-literal union of every
+  registered code.
+
+## Usage: Basic
+
+```ts
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "@suaveplan/api-plugin-campaigns";
+
+try {
+    createCampaignsPlugin({ routePrefix: 42 as never });
+} catch (err) {
+    if (
+        err instanceof CampaignsApiError &&
+        err.code === CAMPAIGNS_API_CODES.INVALID_OPTIONS
+    ) {
+        // The ZodError is attached as `cause`.
+        console.error(err.cause);
+    }
+}
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "@suaveplan/api-plugin-campaigns";
+
+function rethrowAsCampaigns(cause: unknown): never {
+    throw new CampaignsApiError(
+        CAMPAIGNS_API_CODES.INTERNAL_ERROR,
+        "unhandled internal failure inside campaigns plugin",
+        {
+            cause: cause instanceof Error ? cause : new Error(String(cause)),
+            context: { statusCode: 500 },
+        }
+    );
+}
+```
+
+## API Reference
+
+- `CAMPAIGNS_API_CODES` — frozen record with one key per registered reason.
+  Chunk-A keys: `INVALID_OPTIONS`, `INTERNAL_ERROR`. Chunk-B additions:
+  `CAMPAIGN_NOT_FOUND`, `SUPPRESSION_NOT_FOUND`, `INVALID_INPUT`,
+  `DB_UNAVAILABLE`, `DUPLICATE_SUPPRESSION`, `TENANT_REQUIRED`. Chunk-C
+  additions: `INVALID_STATE_TRANSITION`, `INVALID_UNSUBSCRIBE_TOKEN`,
+  `ROUTE_PREFIX_COLLISION`, `WEBHOOK_REJECTED`, `SERVICE_NOT_AVAILABLE`.
+  Every value is the literal string `"CAMPAIGNS_API.<KEY>"`.
+- `class CampaignsApiError extends SuaveplanError<CampaignsApiErrorCode>`
+  - `new CampaignsApiError(code, message, options?)`
+  - `error.code` — the namespaced code string.
+  - `error.campaignsApiCode` — same as `code`, typed narrowly.
+  - `error.cause` / `error.context` — inherited from `SuaveplanError`.
+- `type CampaignsApiErrorCode` — string-literal union over every value of
+  `CAMPAIGNS_API_CODES` (currently eight codes spanning Chunks A and B).
+
+## Implementation Notes
+
+The constructor is `public` rather than `protected` because consumers
+(test suites and integration scaffolds) construct the error directly
+without subclassing. `defineCodes` returns a frozen `Object.create(null)`,
+so `Object.isFrozen(CAMPAIGNS_API_CODES) === true` is an invariant the
+test suite enforces — accidentally swapping it for a plain object literal
+would silently weaken the API contract and tests would catch it.
+
+The Chunk-A registration deliberately excludes codes that Chunks B and C
+will need. Adding unthrown codes here now would either depress branch
+coverage or force placeholder tests that exercise dead code paths;
+incremental registration aligned with each chunk's actual throw sites
+keeps the verification gate honest.

packages/api-stack/api/api-plugin-campaigns/src/error-codes/error-codes.test.ts

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+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { CAMPAIGNS_API_CODES, CampaignsApiError } from "./error-codes.js";
+
+describe("CAMPAIGNS_API_CODES", () => {
+    it("every registered code starts with the CAMPAIGNS_API namespace", {
+        timeout: 5000,
+    }, () => {
+        for (const value of Object.values(CAMPAIGNS_API_CODES)) {
+            expect(value.startsWith("CAMPAIGNS_API.")).toBe(true);
+        }
+    });
+
+    it("registers the Chunk-A+B+C code set", { timeout: 5000 }, () => {
+        expect(Object.keys(CAMPAIGNS_API_CODES).sort()).toEqual([
+            "CAMPAIGN_NOT_FOUND",
+            "DB_UNAVAILABLE",
+            "DUPLICATE_SUPPRESSION",
+            "INTERNAL_ERROR",
+            "INVALID_INPUT",
+            "INVALID_OPTIONS",
+            "INVALID_STATE_TRANSITION",
+            "INVALID_UNSUBSCRIBE_TOKEN",
+            "ROUTE_PREFIX_COLLISION",
+            "SERVICE_NOT_AVAILABLE",
+            "SUPPRESSION_NOT_FOUND",
+            "TENANT_REQUIRED",
+            "WEBHOOK_REJECTED",
+        ]);
+    });
+
+    it("Chunk-C codes carry the CAMPAIGNS_API. prefix", {
+        timeout: 5000,
+    }, () => {
+        expect(CAMPAIGNS_API_CODES.INVALID_STATE_TRANSITION).toBe(
+            "CAMPAIGNS_API.INVALID_STATE_TRANSITION"
+        );
+        expect(CAMPAIGNS_API_CODES.INVALID_UNSUBSCRIBE_TOKEN).toBe(
+            "CAMPAIGNS_API.INVALID_UNSUBSCRIBE_TOKEN"
+        );
+        expect(CAMPAIGNS_API_CODES.ROUTE_PREFIX_COLLISION).toBe(
+            "CAMPAIGNS_API.ROUTE_PREFIX_COLLISION"
+        );
+        expect(CAMPAIGNS_API_CODES.WEBHOOK_REJECTED).toBe(
+            "CAMPAIGNS_API.WEBHOOK_REJECTED"
+        );
+        expect(CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE).toBe(
+            "CAMPAIGNS_API.SERVICE_NOT_AVAILABLE"
+        );
+    });
+
+    it("Chunk-B codes carry the CAMPAIGNS_API. prefix", {
+        timeout: 5000,
+    }, () => {
+        expect(CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND).toBe(
+            "CAMPAIGNS_API.CAMPAIGN_NOT_FOUND"
+        );
+        expect(CAMPAIGNS_API_CODES.SUPPRESSION_NOT_FOUND).toBe(
+            "CAMPAIGNS_API.SUPPRESSION_NOT_FOUND"
+        );
+        expect(CAMPAIGNS_API_CODES.INVALID_INPUT).toBe(
+            "CAMPAIGNS_API.INVALID_INPUT"
+        );
+        expect(CAMPAIGNS_API_CODES.DB_UNAVAILABLE).toBe(
+            "CAMPAIGNS_API.DB_UNAVAILABLE"
+        );
+        expect(CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION).toBe(
+            "CAMPAIGNS_API.DUPLICATE_SUPPRESSION"
+        );
+        expect(CAMPAIGNS_API_CODES.TENANT_REQUIRED).toBe(
+            "CAMPAIGNS_API.TENANT_REQUIRED"
+        );
+    });
+
+    it("registry is frozen", { timeout: 5000 }, () => {
+        expect(Object.isFrozen(CAMPAIGNS_API_CODES)).toBe(true);
+    });
+});
+
+describe("CampaignsApiError", () => {
+    it("preserves cause", { timeout: 5000 }, () => {
+        const cause = new Error("boom");
+        const err = new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INVALID_OPTIONS,
+            "bad options",
+            { cause }
+        );
+        expect(err.cause).toBe(cause);
+        expect(err.code).toBe(CAMPAIGNS_API_CODES.INVALID_OPTIONS);
+        expect(err.campaignsApiCode).toBe(CAMPAIGNS_API_CODES.INVALID_OPTIONS);
+    });
+
+    it("carries context", { timeout: 5000 }, () => {
+        const err = new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INTERNAL_ERROR,
+            "internal",
+            { context: { statusCode: 500, request: "x" } }
+        );
+        expect(err.context).toEqual({ statusCode: 500, request: "x" });
+    });
+
+    it("is instanceof CampaignsApiError + Error", { timeout: 5000 }, () => {
+        const err = new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INTERNAL_ERROR,
+            "x"
+        );
+        expect(err).toBeInstanceOf(CampaignsApiError);
+        expect(err).toBeInstanceOf(Error);
+    });
+
+    it("accepts no options argument (default undefined)", {
+        timeout: 5000,
+    }, () => {
+        const err = new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INVALID_OPTIONS,
+            "x"
+        );
+        expect(err.cause).toBeUndefined();
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/error-codes/error-codes.ts

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+import type { SuaveplanErrorOptions } from "@suaveplan/error";
+import { defineCodes, SuaveplanError } from "@suaveplan/error";
+
+/**
+ * Stable error-code registry for `@suaveplan/api-plugin-campaigns`.
+ *
+ * Chunked migration: Chunk A registers only the codes thrown by the
+ * foundation surface (`createCampaignsPlugin` option validation and the
+ * no-op `onInit` placeholder's catch-all). Chunks B and C MUST extend
+ * this `defineCodes` call rather than introducing a parallel namespace —
+ * see `tasks.md §B.4` for the follow-on additions
+ * (`CAMPAIGN_NOT_FOUND`, `SUPPRESSION_NOT_FOUND`,
+ * `INVALID_STATE_TRANSITION`, `INVALID_UNSUBSCRIBE_TOKEN`,
+ * `ROUTE_PREFIX_COLLISION`, `DUPLICATE_SUPPRESSION`, `TENANT_REQUIRED`,
+ * `WEBHOOK_REJECTED`, `DB_UNAVAILABLE`).
+ *
+ * Each `CampaignsApiError` carries one of the `CAMPAIGNS_API.*` codes;
+ * consumers branch on the string value
+ * (`error.code === CAMPAIGNS_API_CODES.INVALID_OPTIONS`).
+ *
+ * - `INVALID_OPTIONS` — `createCampaignsPlugin(options)` received an
+ *   `options` object that failed `CampaignsPluginOptionsSchema`
+ *   validation. `cause` holds the `ZodError`.
+ * - `INTERNAL_ERROR` — unrecoverable internal failure raised by the
+ *   plugin scaffold; used for catch-all paths that should never trigger
+ *   in healthy operation.
+ * - `CAMPAIGN_NOT_FOUND` / `SUPPRESSION_NOT_FOUND` — lookups against
+ *   the campaign or suppression repositories returned no row, or the
+ *   row belonged to a different tenant.
+ * - `INVALID_INPUT` — Zod validation at a repository or route boundary
+ *   rejected user input.
+ * - `DB_UNAVAILABLE` — the underlying `SurrealAdapter` threw — wrapped
+ *   so callers can branch on a stable code.
+ * - `DUPLICATE_SUPPRESSION` — `(tenantId, channel, channelValue)` was
+ *   already present when `add` ran.
+ * - `TENANT_REQUIRED` — a repository read was called with an empty
+ *   tenant string.
+ * - `INVALID_STATE_TRANSITION` (Chunk C) — a campaign action route
+ *   (`/send`, `/pause`, `/cancel`, …) was invoked against a campaign
+ *   whose current status forbids that event.
+ * - `INVALID_UNSUBSCRIBE_TOKEN` (Chunk C) — `GET /webhooks/unsubscribe/:token`
+ *   received a token that could not be decoded or lacked a `contactId`.
+ * - `ROUTE_PREFIX_COLLISION` (Chunk C) — the configured `routePrefix`
+ *   collides with routes already registered on the host's
+ *   `OpenAPIRegistry`.
+ * - `WEBHOOK_REJECTED` (Chunk C) — webhook ingestion rejected the
+ *   request (malformed body, signature failure, etc.).
+ * - `SERVICE_NOT_AVAILABLE` (Chunk C) — `onInit` could not resolve a
+ *   required ServiceRegistry slot, or a Hono handler found its repo
+ *   context slot empty.
+ */
+export const CAMPAIGNS_API_CODES = defineCodes("CAMPAIGNS_API", [
+    "INVALID_OPTIONS",
+    "INTERNAL_ERROR",
+    "CAMPAIGN_NOT_FOUND",
+    "SUPPRESSION_NOT_FOUND",
+    "INVALID_INPUT",
+    "DB_UNAVAILABLE",
+    "DUPLICATE_SUPPRESSION",
+    "TENANT_REQUIRED",
+    "INVALID_STATE_TRANSITION",
+    "INVALID_UNSUBSCRIBE_TOKEN",
+    "ROUTE_PREFIX_COLLISION",
+    "WEBHOOK_REJECTED",
+    "SERVICE_NOT_AVAILABLE",
+] as const);
+
+/** Discriminated string-literal union of every `CAMPAIGNS_API.*` code. */
+export type CampaignsApiErrorCode =
+    (typeof CAMPAIGNS_API_CODES)[keyof typeof CAMPAIGNS_API_CODES];
+
+/**
+ * Concrete error class for the api-plugin-campaigns package. Extends
+ * `SuaveplanError` so `instanceof CampaignsApiError` narrows the `code`
+ * field to `CampaignsApiErrorCode`. The constructor is intentionally
+ * explicit (delegating straight to `super`) so consumers can subclass
+ * or stub the error in tests without TypeScript inferring a private
+ * constructor.
+ */
+export class CampaignsApiError extends SuaveplanError<CampaignsApiErrorCode> {
+    public readonly campaignsApiCode: CampaignsApiErrorCode;
+
+    public constructor(
+        code: CampaignsApiErrorCode,
+        message: string,
+        options?: SuaveplanErrorOptions
+    ) {
+        super(code, message, options);
+        this.campaignsApiCode = code;
+    }
+}

packages/api-stack/api/api-plugin-campaigns/src/error-codes/index.ts

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+export {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+    type CampaignsApiErrorCode,
+} from "./error-codes.js";

packages/api-stack/api/api-plugin-campaigns/src/index.ts

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+/**
+ * `@suaveplan/api-plugin-campaigns` — Campaigns + suppression +
+ * delivery-webhooks HTTP plugin for `@suaveplan/api`. Chunk C wires
+ * the full route surface: `/campaigns`, `/suppression`, `/webhooks`
+ * mounted via `definePluginRoutes` against the host's
+ * `OpenAPIRegistry`.
+ */
+
+// Side-effect imports — register the error-codes namespace and the
+// ServiceRegistry / ContextVariableMap slots for every consumer.
+import "./error-codes/error-codes.js";
+import "./context/context.js";
+import "./services/registry-augmentation.js";
+
+// Error codes
+export {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+    type CampaignsApiErrorCode,
+} from "./error-codes/error-codes.js";
+
+// OpenTelemetry instruments
+export {
+    type CampaignsApiInstruments,
+    getCampaignsApiInstruments,
+    resetCampaignsApiInstruments,
+} from "./otel/instruments.js";
+
+// Plugin factory + lifecycle
+export { createCampaignsPlugin, runOnInit } from "./plugin/plugin.js";
+
+// Repositories
+export {
+    InMemoryCampaignStore,
+    SurrealCampaignRepository,
+} from "./repositories/campaign/campaign.js";
+export type {
+    CampaignRow,
+    SurrealCampaignRepositoryOptions,
+} from "./repositories/campaign/campaign.types.js";
+export {
+    CreateInputSchema as SuppressionCreateInputSchema,
+    QuerySchema as SuppressionQuerySchema,
+    SurrealCampaignSuppressionRepository,
+} from "./repositories/suppression/suppression.js";
+export type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionQuery,
+    CampaignSuppressionReason,
+    CampaignSuppressionRow,
+    CampaignSuppressionStore,
+    CreateCampaignSuppressionInput,
+    InMemoryCampaignSuppressionStoreOptions,
+    SurrealCampaignSuppressionRepositoryOptions,
+} from "./repositories/suppression/suppression.types.js";
+export { InMemoryCampaignSuppressionStore } from "./repositories/suppression/suppression-memory.js";
+
+// Routes
+export {
+    buildCampaignEventsRoute,
+    buildCampaignRoutes,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildCheckSuppressionRoute,
+    buildCreateCampaignRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteCampaignRoute,
+    buildDeleteSuppressionRoute,
+    buildDeliveryWebhookRoute,
+    buildDuplicateCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildListSuppressionRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildSuppressionRoutes,
+    buildTestSendRoute,
+    buildUnsubscribeRoute,
+    buildUpdateCampaignRoute,
+    buildWebhookRoutes,
+    CampaignIdParamSchema,
+    CampaignListResponseSchema,
+    type CampaignQueryInput,
+    CampaignQuerySchema,
+    CampaignResponseSchema,
+    CampaignStatsSchema,
+    CampaignStatusSchema,
+    CampaignTypeSchema,
+    type CreateCampaignBody,
+    CreateCampaignSchema,
+    type CreateSuppressionBody,
+    CreateSuppressionSchema,
+    campaignToResponse,
+    DeliveryEventTypeSchema,
+    DeliveryStatsResponseSchema,
+    type DeliveryWebhookBody,
+    DeliveryWebhookResponseSchema,
+    DeliveryWebhookSchema,
+    decodeUnsubscribeToken,
+    EMPTY_STATS,
+    EventQuerySchema,
+    requireTenant,
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+    SuppressionIdParamSchema,
+    SuppressionListResponseSchema,
+    type SuppressionQueryInput,
+    SuppressionQuerySchema as SuppressionRouteQuerySchema,
+    SuppressionReasonSchema,
+    SuppressionResponseSchema,
+    stripUndefined,
+    type TenantPrincipal,
+    TestSendSchema,
+    UnsubscribeResponseSchema,
+    UnsubscribeTokenParamSchema,
+    type UnsubscribeTokenPayload,
+    type UpdateCampaignBody,
+    UpdateCampaignSchema,
+} from "./routes/index.js";
+
+// Schemas
+export {
+    type CampaignsPluginOptionsInput,
+    type CampaignsPluginOptionsParsed,
+    CampaignsPluginOptionsSchema,
+} from "./schemas/options.js";
+// Public types
+export type {
+    CampaignsPluginConfig,
+    CampaignsPluginOptions,
+} from "./types/types.js";

packages/api-stack/api/api-plugin-campaigns/src/otel/index.ts

@@ -0,0 +1,5 @@
+export {
+    type CampaignsApiInstruments,
+    getCampaignsApiInstruments,
+    resetCampaignsApiInstruments,
+} from "./instruments.js";

packages/api-stack/api/api-plugin-campaigns/src/otel/instruments.md

@@ -0,0 +1,90 @@
+# `otel/instruments`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `otel/instruments` module owns the OpenTelemetry instrument bundle
+emitted by `@suaveplan/api-plugin-campaigns`. It binds a meter under the
+`"@suaveplan/api-plugin-campaigns"` instrumentation-scope name against the
+process-global `MeterProvider` and exposes a lazily-cached factory so the
+plugin's route handlers, repositories, and lifecycle hooks share a single
+counter / histogram pair without re-resolving the meter on every call.
+
+The bundle is intentionally small in Chunk A: a request-count counter and a
+request-duration histogram covering every route mounted by the plugin.
+Chunks B and C extend it (in their own modules) with per-domain instruments
+for campaign writes, suppression checks, and webhook ingestion outcomes.
+
+## Features
+
+- Lazy, cached meter binding — first call resolves the global meter; later
+  calls return the cached bundle so handlers can record metrics in their
+  hot path without provider lookup overhead.
+- `resetCampaignsApiInstruments()` hook for tests that install a fresh
+  `MeterProvider` after the first cache write.
+- Counter + histogram primitives only; aggregation strategy and views are
+  owned by the host's `MeterProvider`, not this package.
+
+## Usage: Basic
+
+```ts
+import { getCampaignsApiInstruments } from "@suaveplan/api-plugin-campaigns";
+
+const { requestsTotal, requestDurationMs } = getCampaignsApiInstruments();
+
+const start = performance.now();
+try {
+    await handler();
+    requestsTotal.add(1, { route: "/campaigns", outcome: "ok" });
+} catch (err) {
+    requestsTotal.add(1, { route: "/campaigns", outcome: "error" });
+    throw err;
+} finally {
+    requestDurationMs.record(performance.now() - start, {
+        route: "/campaigns",
+    });
+}
+```
+
+## Usage: Advanced
+
+```ts
+import { metrics } from "@opentelemetry/api";
+import { MeterProvider } from "@opentelemetry/sdk-metrics";
+import {
+    getCampaignsApiInstruments,
+    resetCampaignsApiInstruments,
+} from "@suaveplan/api-plugin-campaigns";
+
+// Test set-up: rebind to a freshly-installed provider.
+const provider = new MeterProvider({ readers: [] });
+metrics.setGlobalMeterProvider(provider);
+resetCampaignsApiInstruments();
+
+// The next resolve binds to `provider`, not the implicit global from
+// before the rebind.
+const bundle = getCampaignsApiInstruments();
+bundle.requestsTotal.add(1, { route: "/x", outcome: "ok" });
+```
+
+## API Reference
+
+- `interface CampaignsApiInstruments { readonly requestsTotal: Counter; readonly requestDurationMs: Histogram }`
+- `getCampaignsApiInstruments(): CampaignsApiInstruments` — cached factory.
+- `resetCampaignsApiInstruments(): void` — drops the cache.
+
+## Implementation Notes
+
+The cache is a module-level mutable binding. That is intentional and
+matches the upstream pattern in `@suaveplan/api-plugin-contacts`: an
+inert no-op metric is cheap to recreate, but creating one per request is
+not, so caching plus an explicit reset hook for tests is the simplest
+honest design.
+
+The bundle is `readonly` so handlers cannot accidentally mutate it; the
+cache itself is mutable but only the reset hook reaches it. Reset is
+test-only — production code never invalidates the cache because the
+global provider is installed once at process start.

packages/api-stack/api/api-plugin-campaigns/src/otel/instruments.test.ts

@@ -0,0 +1,46 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    getCampaignsApiInstruments,
+    resetCampaignsApiInstruments,
+} from "./instruments.js";
+
+describe("getCampaignsApiInstruments", () => {
+    it("returns a bundle with both required instruments", {
+        timeout: 5000,
+    }, () => {
+        resetCampaignsApiInstruments();
+        const bundle = getCampaignsApiInstruments();
+        expect(bundle.requestsTotal).toBeDefined();
+        expect(bundle.requestDurationMs).toBeDefined();
+    });
+
+    it("caches the bundle across calls", { timeout: 5000 }, () => {
+        resetCampaignsApiInstruments();
+        const a = getCampaignsApiInstruments();
+        const b = getCampaignsApiInstruments();
+        expect(a).toBe(b);
+    });
+
+    it("rebinds after resetCampaignsApiInstruments()", {
+        timeout: 5000,
+    }, () => {
+        resetCampaignsApiInstruments();
+        const a = getCampaignsApiInstruments();
+        resetCampaignsApiInstruments();
+        const b = getCampaignsApiInstruments();
+        expect(a).not.toBe(b);
+    });
+
+    it("instruments accept record/add calls without throwing", {
+        timeout: 5000,
+    }, () => {
+        resetCampaignsApiInstruments();
+        const bundle = getCampaignsApiInstruments();
+        expect(() =>
+            bundle.requestsTotal.add(1, { route: "/x", outcome: "ok" })
+        ).not.toThrow();
+        expect(() =>
+            bundle.requestDurationMs.record(42, { route: "/x" })
+        ).not.toThrow();
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/otel/instruments.ts

@@ -0,0 +1,57 @@
+import { type Counter, type Histogram, metrics } from "@opentelemetry/api";
+
+/**
+ * Bundle of OpenTelemetry instruments emitted by the campaigns API
+ * plugin. Chunk A defines the two cross-cutting baseline instruments
+ * shared by every route group; Chunks B and C extend this interface
+ * with per-domain counters (campaign writes, suppression checks,
+ * webhook ingestion, etc.) by augmenting the bundle in their own
+ * follow-up modules.
+ *
+ * - `requestsTotal{route,outcome}` — every HTTP request handled by the
+ *   plugin's route trees, partitioned by route and outcome.
+ * - `requestDurationMs{route}` — wall-time histogram of every request
+ *   handled by the plugin, in milliseconds.
+ */
+export interface CampaignsApiInstruments {
+    readonly requestsTotal: Counter;
+    readonly requestDurationMs: Histogram;
+}
+
+let cached: CampaignsApiInstruments | undefined;
+
+/**
+ * Lazily build (and cache) the campaigns-plugin instrument bundle
+ * against the current global `MeterProvider`. Call
+ * {@link resetCampaignsApiInstruments} in test setup to force a re-bind
+ * against a freshly installed provider.
+ */
+export function getCampaignsApiInstruments(): CampaignsApiInstruments {
+    if (cached !== undefined) return cached;
+    const meter = metrics.getMeter("@suaveplan/api-plugin-campaigns");
+    cached = {
+        requestsTotal: meter.createCounter("campaigns_api.requests_total", {
+            description:
+                "Total HTTP requests handled by the campaigns plugin, partitioned by route + outcome",
+        }),
+        requestDurationMs: meter.createHistogram(
+            "campaigns_api.request_duration_ms",
+            {
+                description:
+                    "Wall-time of campaigns-plugin requests in milliseconds, partitioned by route",
+                unit: "ms",
+            }
+        ),
+    };
+    return cached;
+}
+
+/**
+ * Drop the cached instrument bundle so the next
+ * {@link getCampaignsApiInstruments} call rebinds against the global
+ * `MeterProvider` in effect at that point. Tests call this after
+ * installing a fresh `MeterProvider`.
+ */
+export function resetCampaignsApiInstruments(): void {
+    cached = undefined;
+}

packages/api-stack/api/api-plugin-campaigns/src/plugin/index.ts

@@ -0,0 +1 @@
+export { createCampaignsPlugin, runOnInit } from "./plugin.js";

packages/api-stack/api/api-plugin-campaigns/src/plugin/plugin.md

@@ -0,0 +1,101 @@
+# `plugin`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `plugin` module exports `createCampaignsPlugin` — the
+`PluginDescriptor` factory consumed by `@suaveplan/api` hosts. It owns
+the option-validation, dependency-declaration, and lifecycle-hook
+seam for the campaigns plugin. As of Chunk C the `onInit` hook is
+fully wired: it resolves the required services from the host
+`ServiceRegistry`, constructs the SurrealDB-backed `CampaignStore`,
+`CampaignSuppressionStore`, and `DeliveryEventStore` implementations,
+registers them on both the registry and the Hono `ContextVariableMap`
+via a single mount-pattern middleware, and mounts every route group
+through `definePluginRoutes`.
+
+The descriptor declares `dependencies: ["database", "auth", "contacts"]`
+so the host plugin registry topo-sorts the campaigns plugin after the
+three prerequisites — without `database` the `db` service slot is
+empty (and `onInit` throws `SERVICE_NOT_AVAILABLE`); without `auth`
+the per-request `requireTenant` guard rejects every call.
+
+## Features
+
+- Zod-validated options via `CampaignsPluginOptionsSchema`; invalid
+  input surfaces as `CampaignsApiError(INVALID_OPTIONS)` with the
+  `ZodError` attached as `cause`.
+- Service resolution: requires `app` and `db` slots; throws
+  `CampaignsApiError(SERVICE_NOT_AVAILABLE)` if either is empty.
+- Route-prefix collision detection: throws
+  `CampaignsApiError(ROUTE_PREFIX_COLLISION)` if the host
+  `OpenAPIRegistry` already carries routes under the configured prefix.
+- Hono context injection: a single `app.use(mountPattern, ...)`
+  middleware populates `campaignRepository`,
+  `campaignSuppressionStore`, `deliveryEventStore`, and `eventBus` on
+  every request inside the prefix.
+- Route mounting: 18 routes across `/campaigns`, `/suppression`, and
+  `/webhooks` are registered through `definePluginRoutes` (when
+  `openAPIRegistry` is available) or directly via `app[method]`
+  (registry-less fallback for test scaffolds).
+
+## Usage: Basic
+
+```ts
+import { createCampaignsPlugin } from "@suaveplan/api-plugin-campaigns";
+import { createPluginRegistry } from "@suaveplan/api-plugin";
+
+const registry = createPluginRegistry({ /* host config */ });
+registry.register(createCampaignsPlugin());
+```
+
+## Usage: Advanced
+
+```ts
+import { createCampaignsPlugin } from "@suaveplan/api-plugin-campaigns";
+
+const descriptor = createCampaignsPlugin({
+    routePrefix: "/api/v1",
+    maxCampaignsPerTenant: 50_000,
+    maxRecipientsPerCampaign: 5_000_000,
+    defaultThrottlePerSecond: 250,
+    applySchemaOnInit: false,
+    logger: {
+        debug: (msg) => process.stderr.write(`[debug] ${msg}\n`),
+        info: (msg) => process.stderr.write(`[info ] ${msg}\n`),
+        warn: (msg) => process.stderr.write(`[warn ] ${msg}\n`),
+        error: (msg) => process.stderr.write(`[error] ${msg}\n`),
+    },
+});
+```
+
+## API Reference
+
+- `createCampaignsPlugin(options?: CampaignsPluginOptions): PluginDescriptor<CampaignsPluginConfig>`
+- `runOnInit(ctx: PluginContext<CampaignsPluginConfig>, config: CampaignsPluginConfig): Promise<void>`
+  - Exported so tests can drive the hook directly without going
+    through the registry.
+- Throws `CampaignsApiError(CAMPAIGNS_API.INVALID_OPTIONS)` on a Zod
+  parse failure.
+- Throws `CampaignsApiError(CAMPAIGNS_API.SERVICE_NOT_AVAILABLE)` if
+  `app` or `db` services are not registered.
+- Throws `CampaignsApiError(CAMPAIGNS_API.ROUTE_PREFIX_COLLISION)` if
+  the host registry already has routes under the configured prefix.
+
+## Implementation Notes
+
+The mount-pattern middleware uses `*` for the root prefix (`"/"`) and
+`<prefix>/*` for any non-root prefix. This is the same pattern used by
+`@suaveplan/api-plugin-contacts` so plugins compose cleanly when both
+are loaded with the same prefix — Hono's middleware chain dispatches
+the matching pattern, not a globally-shared closure.
+
+Logger resolution follows the pattern in `@suaveplan/api-plugin-contacts`:
+caller-supplied `config.logger` takes precedence over the host-supplied
+`ctx.logger`. The warn-level message in the registry-less fallback is
+the only non-debug log this plugin emits during init; it documents the
+fact that the plugin mounted but its routes are not in the OpenAPI
+spec, which is almost always operationally significant.

packages/api-stack/api/api-plugin-campaigns/src/plugin/plugin.test.ts

@@ -0,0 +1,297 @@
+import { OpenAPIHono } from "@hono/zod-openapi";
+import { createOpenAPIRegistry } from "@suaveplan/api-openapi";
+import { createPluginContext } from "@suaveplan/api-plugin";
+import { EventBus } from "@suaveplan/events";
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../error-codes/error-codes.js";
+import { createCampaignsPlugin, runOnInit } from "./plugin.js";
+
+const noopLogger = {
+    debug: () => undefined,
+    info: () => undefined,
+    warn: () => undefined,
+    error: () => undefined,
+};
+
+function makeFakeDb(): SurrealAdapter {
+    return {
+        async execute() {},
+        async query() {
+            return [];
+        },
+    } as unknown as SurrealAdapter;
+}
+
+function makeCtx(
+    overrides: {
+        app?: OpenAPIHono | undefined;
+        db?: SurrealAdapter | undefined;
+        registry?: ReturnType<typeof createOpenAPIRegistry> | undefined;
+        logger?: typeof noopLogger;
+    } = {}
+) {
+    const app = overrides.app ?? new OpenAPIHono();
+    const services = new Map<string, unknown>();
+    if (app !== undefined) services.set("app", app);
+    if (overrides.db !== undefined) services.set("db", overrides.db);
+    if (overrides.registry !== undefined) {
+        services.set("openAPIRegistry", overrides.registry);
+    }
+    const ctx = createPluginContext({
+        logger: overrides.logger ?? noopLogger,
+        eventBus: new EventBus(),
+        signal: new AbortController().signal,
+        config: {} as never,
+        services,
+    });
+    return { ctx, app, services };
+}
+
+describe("createCampaignsPlugin", () => {
+    it("returns a typed descriptor with default config", {
+        timeout: 5000,
+    }, () => {
+        const desc = createCampaignsPlugin();
+        expect(desc.name).toBe("campaigns");
+        expect(desc.version).toBe("0.1.0");
+        expect(desc.dependencies).toEqual(["database", "auth", "contacts"]);
+        const defaults = desc.defaults as NonNullable<typeof desc.defaults>;
+        expect(defaults.routePrefix).toBe("/");
+        expect(defaults.maxCampaignsPerTenant).toBe(10_000);
+        expect(defaults.maxRecipientsPerCampaign).toBe(1_000_000);
+        expect(defaults.defaultThrottlePerSecond).toBe(100);
+        expect(defaults.applySchemaOnInit).toBe(true);
+    });
+
+    it("throws CAMPAIGNS_API.INVALID_OPTIONS on invalid options", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            createCampaignsPlugin({ maxCampaignsPerTenant: -1 } as never)
+        ).toThrowError(CampaignsApiError);
+    });
+
+    it("INVALID_OPTIONS error carries the ZodError as cause", {
+        timeout: 5000,
+    }, () => {
+        try {
+            createCampaignsPlugin({ routePrefix: "" } as never);
+            expect.fail("expected throw");
+        } catch (err) {
+            expect(err).toBeInstanceOf(CampaignsApiError);
+            const ce = err as CampaignsApiError;
+            expect(ce.code).toBe(CAMPAIGNS_API_CODES.INVALID_OPTIONS);
+            expect(ce.cause).toBeDefined();
+        }
+    });
+
+    it("honours a custom routePrefix", { timeout: 5000 }, () => {
+        const desc = createCampaignsPlugin({ routePrefix: "/api/v1" });
+        const defaults = desc.defaults as NonNullable<typeof desc.defaults>;
+        expect(defaults.routePrefix).toBe("/api/v1");
+    });
+
+    it("descriptor advertises name, dependencies, version, tags", {
+        timeout: 5000,
+    }, () => {
+        const desc = createCampaignsPlugin();
+        expect(desc.tags).toEqual([
+            "campaigns",
+            "suppression",
+            "webhooks",
+            "delivery",
+        ]);
+    });
+
+    it("stores a logger on the resolved config when supplied", {
+        timeout: 5000,
+    }, () => {
+        const desc = createCampaignsPlugin({ logger: { ...noopLogger } });
+        const defaults = desc.defaults as NonNullable<typeof desc.defaults>;
+        const out = defaults.logger as NonNullable<typeof defaults.logger>;
+        expect(typeof out.debug).toBe("function");
+        expect(typeof out.info).toBe("function");
+        expect(typeof out.warn).toBe("function");
+        expect(typeof out.error).toBe("function");
+    });
+
+    it("omits the logger slot when none supplied", { timeout: 5000 }, () => {
+        const desc = createCampaignsPlugin();
+        const defaults = desc.defaults as NonNullable<typeof desc.defaults>;
+        expect("logger" in defaults).toBe(false);
+    });
+});
+
+describe("plugin onInit (Chunk C wiring)", () => {
+    it("throws SERVICE_NOT_AVAILABLE when app slot missing", {
+        timeout: 5000,
+    }, async () => {
+        const services = new Map<string, unknown>();
+        services.set("db", makeFakeDb());
+        const ctx = createPluginContext({
+            logger: noopLogger,
+            eventBus: new EventBus(),
+            signal: new AbortController().signal,
+            config: {} as never,
+            services,
+        });
+        const desc = createCampaignsPlugin();
+        await expect(
+            runOnInit(ctx as never, desc.defaults as never)
+        ).rejects.toMatchObject({
+            code: CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+        });
+    });
+
+    it("throws SERVICE_NOT_AVAILABLE when db slot missing", {
+        timeout: 5000,
+    }, async () => {
+        const { ctx } = makeCtx({});
+        const desc = createCampaignsPlugin();
+        await expect(
+            runOnInit(ctx as never, desc.defaults as never)
+        ).rejects.toMatchObject({
+            code: CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+        });
+    });
+
+    it("registers campaign + suppression + delivery-event services", {
+        timeout: 5000,
+    }, async () => {
+        const { ctx } = makeCtx({ db: makeFakeDb() });
+        const desc = createCampaignsPlugin();
+        await runOnInit(ctx as never, desc.defaults as never);
+        expect(ctx.getService("campaignRepository")).toBeDefined();
+        expect(ctx.getService("campaignSuppressionStore")).toBeDefined();
+        expect(ctx.getService("deliveryEventStore")).toBeDefined();
+    });
+
+    it("warns when openAPIRegistry is absent and still mounts handlers", {
+        timeout: 5000,
+    }, async () => {
+        const messages: string[] = [];
+        const logger = {
+            ...noopLogger,
+            warn: (msg: string) => messages.push(msg),
+        };
+        const { ctx } = makeCtx({ db: makeFakeDb(), logger });
+        const desc = createCampaignsPlugin();
+        await runOnInit(ctx as never, desc.defaults as never);
+        expect(messages.some((m) => m.includes("openAPIRegistry"))).toBe(true);
+    });
+
+    it("registers routes through the OpenAPI registry when provided", {
+        timeout: 5000,
+    }, async () => {
+        const registry = createOpenAPIRegistry({
+            info: { title: "t", version: "0.0.0" },
+        });
+        const { ctx } = makeCtx({ db: makeFakeDb(), registry });
+        const desc = createCampaignsPlugin();
+        await runOnInit(ctx as never, desc.defaults as never);
+        const paths = registry.getRoutes().map((r) => r.path);
+        expect(paths).toContain("/campaigns");
+        expect(paths).toContain("/suppression");
+        expect(paths).toContain("/webhooks/delivery");
+    });
+
+    it("raises ROUTE_PREFIX_COLLISION on re-run with same registry", {
+        timeout: 5000,
+    }, async () => {
+        const registry = createOpenAPIRegistry({
+            info: { title: "t", version: "0.0.0" },
+        });
+        const { ctx } = makeCtx({ db: makeFakeDb(), registry });
+        const desc = createCampaignsPlugin();
+        await runOnInit(ctx as never, desc.defaults as never);
+        await expect(
+            runOnInit(ctx as never, desc.defaults as never)
+        ).rejects.toMatchObject({
+            code: CAMPAIGNS_API_CODES.ROUTE_PREFIX_COLLISION,
+        });
+    });
+
+    it("honours a custom routePrefix when no registry is available", {
+        timeout: 5000,
+    }, async () => {
+        const { ctx, app } = makeCtx({ db: makeFakeDb() });
+        const desc = createCampaignsPlugin({ routePrefix: "/api" });
+        await runOnInit(ctx as never, desc.defaults as never);
+        const res = await app.request("/api/campaigns");
+        expect([200, 401, 500]).toContain(res.status);
+    });
+
+    it("prefixes registry-mounted routes when routePrefix is non-root", {
+        timeout: 5000,
+    }, async () => {
+        const registry = createOpenAPIRegistry({
+            info: { title: "t", version: "0.0.0" },
+        });
+        const { ctx } = makeCtx({ db: makeFakeDb(), registry });
+        const desc = createCampaignsPlugin({ routePrefix: "/api" });
+        await runOnInit(ctx as never, desc.defaults as never);
+        const paths = registry.getRoutes().map((r) => r.path);
+        expect(paths).toContain("/api/campaigns");
+        expect(paths).toContain("/api/suppression");
+    });
+
+    it("descriptor onInit hook reaches runOnInit", {
+        timeout: 5000,
+    }, async () => {
+        const { ctx } = makeCtx({ db: makeFakeDb() });
+        const desc = createCampaignsPlugin();
+        const hook = desc.onInit;
+        expect(hook).toBeDefined();
+        await expect(
+            (hook as NonNullable<typeof hook>)(ctx as never)
+        ).resolves.toBeUndefined();
+    });
+
+    it("exercises the default clock + idGenerator via store.add", {
+        timeout: 5000,
+    }, async () => {
+        const calls: Array<{ sql: string; params: readonly unknown[] }> = [];
+        const db = {
+            async execute() {},
+            async query(sql: string, params: readonly unknown[]) {
+                calls.push({ sql, params });
+                return [];
+            },
+        } as unknown as SurrealAdapter;
+        const { ctx } = makeCtx({ db });
+        const desc = createCampaignsPlugin();
+        await runOnInit(ctx as never, desc.defaults as never);
+        const store = ctx.getService("campaignSuppressionStore");
+        if (store === undefined) throw new Error("store missing");
+        await store.add({
+            tenantId: "t",
+            channel: "email",
+            channelValue: "a@b.com",
+            reason: "manual",
+        });
+        // idGenerator (params[0]) and clock-stamped createdAt (params[7])
+        // should both be set by the defaults.
+        const addCall = calls.find((c) => c.sql.startsWith("INSERT"));
+        expect(addCall).toBeDefined();
+        expect(typeof addCall?.params[0]).toBe("string");
+        expect(addCall?.params[7]).toBeInstanceOf(Date);
+    });
+
+    it("config.logger overrides ctx.logger for warn path", {
+        timeout: 5000,
+    }, async () => {
+        const messages: string[] = [];
+        const logger = {
+            ...noopLogger,
+            warn: (msg: string) => messages.push(msg),
+        };
+        const { ctx } = makeCtx({ db: makeFakeDb() });
+        const desc = createCampaignsPlugin({ logger });
+        await runOnInit(ctx as never, desc.defaults as never);
+        expect(messages.some((m) => m.includes("openAPIRegistry"))).toBe(true);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/plugin/plugin.ts

@@ -0,0 +1,235 @@
+/**
+ * `createCampaignsPlugin` — `PluginDescriptor` factory for
+ * `@suaveplan/api`. Chunk C wires the full `onInit`: option
+ * validation, descriptor wiring, ServiceRegistry resolution,
+ * repository + delivery-event-store construction, Hono context
+ * injection, and route mounting via `definePluginRoutes`.
+ */
+
+import type { OpenAPIHono } from "@hono/zod-openapi";
+import {
+    definePluginRoutes,
+    type OpenAPIRegistry,
+} from "@suaveplan/api-openapi";
+import {
+    definePlugin,
+    type PluginContext,
+    type PluginDescriptor,
+} from "@suaveplan/api-plugin";
+import type { CampaignStore } from "@suaveplan/campaigns";
+import {
+    type DeliveryEventStore,
+    SurrealDeliveryEventStore,
+} from "@suaveplan/delivery-tracking";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../error-codes/error-codes.js";
+import { SurrealCampaignRepository } from "../repositories/campaign/campaign.js";
+import { SurrealCampaignSuppressionRepository } from "../repositories/suppression/suppression.js";
+import type { CampaignSuppressionStore } from "../repositories/suppression/suppression.types.js";
+import { buildCampaignRoutes } from "../routes/campaigns/build-routes.js";
+import { buildSuppressionRoutes } from "../routes/suppression/build-routes.js";
+import { buildWebhookRoutes } from "../routes/webhooks/build-routes.js";
+import { CampaignsPluginOptionsSchema } from "../schemas/options.js";
+import type {
+    CampaignsPluginConfig,
+    CampaignsPluginOptions,
+} from "../types/types.js";
+import "../context/context.js";
+import "../services/registry-augmentation.js";
+
+/**
+ * Factory — returns the typed `PluginDescriptor`. Zod-validates
+ * `options` at construction time; invalid options surface as
+ * `CampaignsApiError(INVALID_OPTIONS)` with the `ZodError` carried as
+ * `cause`. The descriptor declares
+ * `dependencies: ["database", "auth", "contacts"]` so the host
+ * topo-sorts after the three prerequisite plugins.
+ */
+export function createCampaignsPlugin(
+    options: CampaignsPluginOptions = {}
+): PluginDescriptor<CampaignsPluginConfig> {
+    const parsed = CampaignsPluginOptionsSchema.safeParse(options);
+    if (!parsed.success) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INVALID_OPTIONS,
+            "createCampaignsPlugin received invalid options",
+            { cause: parsed.error, context: { statusCode: 500 } }
+        );
+    }
+    const resolved: CampaignsPluginConfig = {
+        routePrefix: parsed.data.routePrefix,
+        maxCampaignsPerTenant: parsed.data.maxCampaignsPerTenant,
+        maxRecipientsPerCampaign: parsed.data.maxRecipientsPerCampaign,
+        defaultThrottlePerSecond: parsed.data.defaultThrottlePerSecond,
+        applySchemaOnInit: parsed.data.applySchemaOnInit,
+        ...(parsed.data.logger !== undefined
+            ? { logger: parsed.data.logger }
+            : {}),
+    };
+
+    return definePlugin<CampaignsPluginConfig>({
+        name: "campaigns",
+        version: "0.1.0",
+        description:
+            "Campaigns + suppression + delivery-webhooks HTTP plugin for @suaveplan/api. Mounts /campaigns, /suppression, and /webhooks on a Hono OpenAPI registry, backed by SurrealDB-backed CampaignStore + CampaignSuppressionStore + DeliveryEventStore.",
+        dependencies: ["database", "auth", "contacts"],
+        defaults: resolved,
+        tags: ["campaigns", "suppression", "webhooks", "delivery"],
+        onInit: async (ctx) => runOnInit(ctx, resolved),
+    });
+}
+
+/** Default wall-clock used when no `clock` service is registered. */
+const defaultClock = (): number => Date.now();
+/** Default id-generator used to stamp suppression-entry primary keys. */
+const defaultIdGenerator = (): string => crypto.randomUUID();
+
+interface ResolvedServices {
+    readonly app: OpenAPIHono;
+    readonly openAPIRegistry: OpenAPIRegistry | undefined;
+    readonly campaignRepository: CampaignStore;
+    readonly suppressionStore: CampaignSuppressionStore;
+    readonly deliveryEventStore: DeliveryEventStore;
+}
+
+function resolveServices(
+    ctx: PluginContext<CampaignsPluginConfig>
+): ResolvedServices {
+    const app = ctx.getService("app");
+    if (app === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaigns plugin requires the `app` service in ServiceRegistry",
+            { context: { missing: ["app"], statusCode: 500 } }
+        );
+    }
+    const db = ctx.getService("db");
+    const openAPIRegistry = ctx.getService("openAPIRegistry");
+    if (db === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaigns plugin requires the `db` service — load @suaveplan/api-plugin-database first",
+            { context: { missing: ["db"], statusCode: 500 } }
+        );
+    }
+    const clock = ctx.getService("clock") ?? defaultClock;
+    const idGenerator = defaultIdGenerator;
+    const campaignRepository = new SurrealCampaignRepository({
+        db,
+        clock,
+    });
+    const suppressionStore = new SurrealCampaignSuppressionRepository({
+        db,
+        clock,
+        idGenerator,
+    });
+    const deliveryEventStore = new SurrealDeliveryEventStore(db);
+    return {
+        app,
+        openAPIRegistry,
+        campaignRepository,
+        suppressionStore,
+        deliveryEventStore,
+    };
+}
+
+function detectCollision(registry: OpenAPIRegistry, routePrefix: string): void {
+    const collisionPrefix =
+        routePrefix === "/" ? "/campaigns" : `${routePrefix}/campaigns`;
+    const existing = registry
+        .getRoutes()
+        .filter((r) => r.path.startsWith(collisionPrefix));
+    if (existing.length > 0) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.ROUTE_PREFIX_COLLISION,
+            `Route prefix '${routePrefix}' collides with previously registered routes`,
+            {
+                context: {
+                    prefix: routePrefix,
+                    existing: existing.map((r) => r.path),
+                    statusCode: 500,
+                },
+            }
+        );
+    }
+}
+
+/**
+ * Chunk-C `onInit`. Resolves required services from the host
+ * `ServiceRegistry`, constructs the campaign + suppression +
+ * delivery-event-store implementations, registers them on both the
+ * registry and the Hono `ContextVariableMap` via a single
+ * mount-pattern middleware, and finally mounts every route group.
+ */
+export async function runOnInit(
+    ctx: PluginContext<CampaignsPluginConfig>,
+    config: CampaignsPluginConfig
+): Promise<void> {
+    const services = resolveServices(ctx);
+    const {
+        app,
+        openAPIRegistry,
+        campaignRepository,
+        suppressionStore,
+        deliveryEventStore,
+    } = services;
+    const logger = config.logger ?? ctx.logger;
+
+    ctx.registerService("campaignRepository", campaignRepository);
+    ctx.registerService("campaignSuppressionStore", suppressionStore);
+    ctx.registerService("deliveryEventStore", deliveryEventStore);
+
+    const eventBus = ctx.eventBus;
+    const prefix = config.routePrefix;
+    const mountPattern = prefix === "/" ? "*" : `${prefix}/*`;
+    app.use(mountPattern, async (c, next) => {
+        c.set("campaignRepository", campaignRepository);
+        c.set("campaignSuppressionStore", suppressionStore);
+        c.set("deliveryEventStore", deliveryEventStore);
+        c.set("eventBus", eventBus);
+        await next();
+    });
+
+    if (openAPIRegistry !== undefined) {
+        detectCollision(openAPIRegistry, prefix);
+    }
+
+    const entries = [
+        ...buildCampaignRoutes(),
+        ...buildSuppressionRoutes(),
+        ...buildWebhookRoutes(),
+    ];
+    if (openAPIRegistry !== undefined) {
+        const prefixedEntries = entries.map((entry) => ({
+            ...entry,
+            route: {
+                ...entry.route,
+                path: `${prefix === "/" ? "" : prefix}${entry.route.path}`,
+            },
+        }));
+        definePluginRoutes(prefixedEntries, {
+            app,
+            registry: openAPIRegistry,
+            pluginName: "campaigns",
+        });
+        return;
+    }
+    logger.warn(
+        "campaigns plugin: openAPIRegistry not registered — routes will not appear in /openapi.json"
+    );
+    for (const entry of entries) {
+        const method = entry.route.method as
+            | "get"
+            | "post"
+            | "put"
+            | "patch"
+            | "delete";
+        const path = `${prefix === "/" ? "" : prefix}${entry.route.path}`;
+        app[method](
+            path,
+            async (c) => (await entry.handler(c as never)) as Response
+        );
+    }
+}

packages/api-stack/api/api-plugin-campaigns/src/repositories/campaign/campaign.md

@@ -0,0 +1,104 @@
+# `repositories/campaign`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module owns the SurrealDB-backed implementation of the campaign
+persistence contract for `@suaveplan/api-plugin-campaigns`. It implements
+the `CampaignStore` interface exported by `@suaveplan/campaigns` so the
+in-process `CampaignEngine` and the HTTP route layer (Chunk C) can both
+read and write campaign records through a single, swappable port.
+
+The repository follows the suaveplan SurrealDB idiom established by
+`@suaveplan/delivery-tracking`: every database call is a single
+`SurrealAdapter.query<T>(sql, params)` invocation using positional
+`$p0`/`$p1`/... placeholders, the SQL is auditable at a glance, and every
+adapter exception is wrapped in a `CampaignsApiError` with a stable
+`CAMPAIGNS_API.*` code so callers can branch on string equality rather
+than inspecting driver internals.
+
+## Features
+
+- Positional SurQL parameter binding (`$p0`, `$p1`, ...) — no named-var
+  drift, no driver-specific quirks bleeding into our error messages.
+- Snake-case column ↔ camelCase property mapping handled in a single
+  `rowToCampaign` helper so the column vocabulary lives in exactly one
+  place.
+- Zod guards (`IdSchema`, `CampaignQuerySchema`) at the repository boundary
+  — invalid input throws `INVALID_INPUT` before any SurQL is issued.
+- Idiomatic `update()` short-circuit: an empty `UpdateCampaignInput` skips
+  the write and re-reads via `getById`, mirroring the upstream behaviour
+  but with proper `CAMPAIGN_NOT_FOUND` semantics.
+- `InMemoryCampaignStore` re-export so consumers always have a single
+  import surface regardless of backend choice.
+
+## Usage: Basic
+
+```ts
+import { SurrealCampaignRepository } from "@suaveplan/api-plugin-campaigns/repositories/campaign/campaign";
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+
+declare const db: SurrealAdapter;
+const repo = new SurrealCampaignRepository({ db, clock: () => Date.now() });
+const campaign = await repo.getById("c-123");
+```
+
+## Usage: Advanced
+
+```ts
+import { SurrealCampaignRepository } from "@suaveplan/api-plugin-campaigns/repositories/campaign/campaign";
+import { CAMPAIGNS_API_CODES, CampaignsApiError } from "@suaveplan/api-plugin-campaigns";
+
+const repo = new SurrealCampaignRepository({
+    db,
+    clock: () => Date.now(),
+    table: "campaign_v2", // override for blue/green deploys
+});
+
+try {
+    await repo.update("c-123", { name: "Renamed" });
+} catch (err) {
+    if (
+        err instanceof CampaignsApiError &&
+        err.code === CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+    ) {
+        // ... return a 404 from the HTTP layer
+    }
+}
+```
+
+## API Reference
+
+- `interface SurrealCampaignRepositoryOptions` — constructor bundle:
+  `db`, `clock`, optional `table`, optional `logger`.
+- `class SurrealCampaignRepository implements CampaignStore` — exposes
+  `create`, `getById`, `update`, `delete`, `list`, `updateStats`,
+  `updateStatus`. Every method either returns a domain `Campaign` (or
+  `Campaign[]`, `boolean`, `null`) or throws `CampaignsApiError`.
+- `InMemoryCampaignStore` — re-export from `@suaveplan/campaigns` for
+  tests and prototype workloads.
+- `interface CampaignRow` — SurrealDB row shape consumed by
+  `rowToCampaign`; exported from `./campaign.types.ts` for tests.
+
+## Implementation Notes
+
+The `update` short-circuit (no fields → `getById`) mirrors the upstream
+contract but raises `CAMPAIGN_NOT_FOUND` rather than a generic `Error`
+when the record is missing. SurrealDB rejects empty `SET` clauses, so the
+short-circuit is necessary to keep the public API ergonomic.
+
+Optional fields land on the wire as explicit `null` rather than
+`undefined` because SurrealDB treats absent keys as "leave alone" on
+`MERGE`, which would surprise callers using the `Partial<CampaignStats>`
+input. Returning rows are normalised back to `undefined` in
+`rowToCampaign` so the in-memory and SurrealDB stores are
+indistinguishable from above.
+
+`Zod` validation is intentionally narrow — only `id` and the listing
+`CampaignQuery` are validated. Full `Campaign` shape validation belongs in
+the route layer (Chunk C); the repository trusts callers to honour the
+upstream type contract while still defending against the two boundary
+shapes that come from untrusted HTTP input.

packages/api-stack/api/api-plugin-campaigns/src/repositories/campaign/campaign.test.ts

@@ -0,0 +1,433 @@
+import type { Campaign } from "@suaveplan/campaigns";
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import {
+    InMemoryCampaignStore,
+    SurrealCampaignRepository,
+} from "./campaign.js";
+
+type QueryFn = (sql: string, params?: readonly unknown[]) => Promise<unknown>;
+
+function adapter(queryFn: QueryFn): SurrealAdapter {
+    return { query: queryFn } as unknown as SurrealAdapter;
+}
+
+function campaign(overrides: Partial<Campaign> = {}): Campaign {
+    return {
+        id: "c1",
+        tenantId: "t1",
+        name: "Test",
+        status: "draft",
+        type: "broadcast",
+        channel: "email",
+        audienceConfig: { groupIds: ["g1"] },
+        metadata: {},
+        stats: {
+            totalRecipients: 0,
+            sent: 0,
+            delivered: 0,
+            opened: 0,
+            clicked: 0,
+            bounced: 0,
+            unsubscribed: 0,
+            complained: 0,
+            failed: 0,
+        },
+        createdAt: new Date("2026-01-01T00:00:00Z"),
+        updatedAt: new Date("2026-01-01T00:00:00Z"),
+        ...overrides,
+    };
+}
+
+function row(overrides: Record<string, unknown> = {}): Record<string, unknown> {
+    return {
+        id: "c1",
+        tenant_id: "t1",
+        name: "Test",
+        status: "draft",
+        type: "broadcast",
+        channel: "email",
+        audience_config: { groupIds: ["g1"] },
+        template_id: null,
+        template_data: null,
+        schedule: null,
+        throttle: null,
+        ab_test_config: null,
+        metadata: { k: "v" },
+        stats: { sent: 0 },
+        created_at: "2026-01-01T00:00:00.000Z",
+        updated_at: "2026-01-01T00:00:00.000Z",
+        sent_at: null,
+        completed_at: null,
+        ...overrides,
+    };
+}
+
+function repo(queryFn: QueryFn, table?: string): SurrealCampaignRepository {
+    return new SurrealCampaignRepository({
+        db: adapter(queryFn),
+        clock: () => 0,
+        table,
+        logger: { debug() {}, info() {}, warn() {}, error() {} } as never,
+    });
+}
+
+describe("SurrealCampaignRepository.create", () => {
+    it("emits a positional INSERT with the campaign payload", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [];
+        });
+        const c = campaign({ templateId: "tpl", templateData: { x: 1 } });
+        const result = await r.create(c);
+        expect(result).toBe(c);
+        expect(calls[0]!.sql).toContain("INSERT INTO campaign");
+        expect(calls[0]!.params[0]).toBe("c1");
+        expect(calls[0]!.params[7]).toBe("tpl");
+        expect(calls[0]!.params[8]).toEqual({ x: 1 });
+    });
+
+    it("wraps adapter errors in DB_UNAVAILABLE", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => {
+            throw new Error("driver-down");
+        });
+        let captured: unknown;
+        try {
+            await r.create(campaign());
+        } catch (e) {
+            captured = e;
+        }
+        expect(captured).toBeInstanceOf(CampaignsApiError);
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.DB_UNAVAILABLE
+        );
+    });
+});
+
+describe("SurrealCampaignRepository.getById", () => {
+    it("returns null for an empty result", { timeout: 5000 }, async () => {
+        const r = repo(async () => []);
+        expect(await r.getById("missing")).toBeNull();
+    });
+
+    it("maps the row, parses Date strings and includes the WHERE clause", {
+        timeout: 5000,
+    }, async () => {
+        const calls: string[] = [];
+        const r = repo(async (sql) => {
+            calls.push(sql);
+            return [row({ sent_at: "2026-02-01T00:00:00.000Z" })];
+        });
+        const c = await r.getById("c1");
+        expect(c?.id).toBe("c1");
+        expect(c?.createdAt).toBeInstanceOf(Date);
+        expect(c?.sentAt).toBeInstanceOf(Date);
+        expect(calls[0]).toContain("WHERE id = $p0");
+        expect(calls[0]).toContain("FROM campaign");
+    });
+
+    it("preserves a Date passed through (not a string)", {
+        timeout: 5000,
+    }, async () => {
+        const ts = new Date("2026-06-01T12:00:00.000Z");
+        const r = repo(async () => [row({ created_at: ts, updated_at: ts })]);
+        const c = await r.getById("c1");
+        expect(c?.createdAt).toEqual(ts);
+        expect(c?.updatedAt).toEqual(ts);
+    });
+
+    it("uses {} for missing metadata and undefined for null optionals", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => [
+            row({
+                metadata: null,
+                schedule: { type: "immediate" },
+                throttle: { messagesPerSecond: 1 },
+                ab_test_config: { variants: [], splitType: "even" },
+                template_id: "tpl",
+                template_data: { x: 1 },
+                completed_at: "2026-03-01",
+            }),
+        ]);
+        const c = await r.getById("c1");
+        expect(c?.metadata).toEqual({});
+        expect(c?.templateId).toBe("tpl");
+        expect(c?.schedule).toEqual({ type: "immediate" });
+        expect(c?.throttle).toEqual({ messagesPerSecond: 1 });
+        expect(c?.abTestConfig).toEqual({ variants: [], splitType: "even" });
+        expect(c?.completedAt).toBeInstanceOf(Date);
+    });
+
+    it("falls back to epoch when timestamps are absent on the row", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => [
+            row({ created_at: null as never, updated_at: null as never }),
+        ]);
+        const c = await r.getById("c1");
+        expect(c?.createdAt.getTime()).toBe(0);
+        expect(c?.updatedAt.getTime()).toBe(0);
+    });
+
+    it("rejects an empty id with INVALID_INPUT", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.getById("");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("wraps query errors in DB_UNAVAILABLE", { timeout: 5000 }, async () => {
+        const r = repo(async () => {
+            throw new Error("network");
+        });
+        let captured: unknown;
+        try {
+            await r.getById("c1");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.DB_UNAVAILABLE
+        );
+    });
+});
+
+describe("SurrealCampaignRepository.update", () => {
+    it("issues an UPDATE with each provided field bound positionally", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [row({ name: "Renamed" })];
+        });
+        const result = await r.update("c1", {
+            name: "Renamed",
+            channel: "sms",
+            audienceConfig: { groupIds: ["g2"] },
+            templateId: "tpl-2",
+            templateData: { y: 2 },
+            schedule: { type: "immediate" },
+            throttle: { messagesPerSecond: 1 },
+            abTestConfig: { variants: [], splitType: "even" },
+            metadata: { z: 3 },
+        });
+        expect(result.name).toBe("Renamed");
+        expect(calls[0]!.sql).toContain("name = $p1");
+        expect(calls[0]!.sql).toContain("channel = $p2");
+        expect(calls[0]!.sql).toContain("metadata = $p9");
+        expect(calls[0]!.sql).toContain("WHERE id = $p0");
+    });
+
+    it("short-circuits to getById when no fields supplied (found)", {
+        timeout: 5000,
+    }, async () => {
+        let getCalls = 0;
+        const r = repo(async (sql) => {
+            if (sql.startsWith("SELECT")) {
+                getCalls++;
+                return [row()];
+            }
+            throw new Error("should not have run UPDATE");
+        });
+        const result = await r.update("c1", {});
+        expect(result.id).toBe("c1");
+        expect(getCalls).toBe(1);
+    });
+
+    it("short-circuits to getById when no fields supplied (missing)", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.update("c1", {});
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+        );
+    });
+
+    it("throws CAMPAIGN_NOT_FOUND when UPDATE returns no rows", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.update("c1", { name: "x" });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+        );
+    });
+});
+
+describe("SurrealCampaignRepository.delete + list + updateStats + updateStatus", () => {
+    it("delete returns true when DELETE returns a row", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => [row()]);
+        expect(await r.delete("c1")).toBe(true);
+    });
+
+    it("delete returns false when DELETE returns nothing", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        expect(await r.delete("c1")).toBe(false);
+    });
+
+    it("list threads filters + paging into SQL and binds them positionally", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [row(), row({ id: "c2" })];
+        });
+        const result = await r.list({
+            tenantId: "t1",
+            status: "draft",
+            type: "broadcast",
+            channel: "email",
+            limit: 25,
+            offset: 5,
+        });
+        expect(result).toHaveLength(2);
+        expect(calls[0]!.sql).toContain("tenant_id = $p0");
+        expect(calls[0]!.sql).toContain("status = $p1");
+        expect(calls[0]!.sql).toContain("type = $p2");
+        expect(calls[0]!.sql).toContain("channel = $p3");
+        expect(calls[0]!.sql).toContain("LIMIT 25");
+        expect(calls[0]!.sql).toContain("START 5");
+    });
+
+    it("list applies defaults when limit/offset omitted and no filters", {
+        timeout: 5000,
+    }, async () => {
+        const calls: string[] = [];
+        const r = repo(async (sql) => {
+            calls.push(sql);
+            return [];
+        });
+        await r.list({});
+        expect(calls[0]).toContain("LIMIT 50");
+        expect(calls[0]).not.toContain("WHERE");
+        expect(calls[0]).not.toContain("START");
+    });
+
+    it("list rejects invalid query (negative limit)", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.list({ limit: -1 });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("updateStats MERGEs and returns the mapped row", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [row({ stats: { sent: 5 } })];
+        });
+        const result = await r.updateStats("c1", { sent: 5 });
+        expect(result.stats).toEqual({ sent: 5 });
+        expect(calls[0]!.sql).toContain("MERGE { stats: $p1 }");
+        expect(calls[0]!.params[1]).toEqual({ sent: 5 });
+    });
+
+    it("updateStats throws CAMPAIGN_NOT_FOUND on empty result", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.updateStats("c1", { sent: 1 });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+        );
+    });
+
+    it("updateStatus sets the new status positionally", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [row({ status: "sending" })];
+        });
+        const c = await r.updateStatus("c1", "sending");
+        expect(c.status).toBe("sending");
+        expect(calls[0]!.sql).toContain("SET status = $p1");
+        expect(calls[0]!.params[1]).toBe("sending");
+    });
+
+    it("updateStatus throws CAMPAIGN_NOT_FOUND on empty result", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.updateStatus("c1", "sending");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+        );
+    });
+
+    it("respects a custom table name", { timeout: 5000 }, async () => {
+        const calls: string[] = [];
+        const r = repo(async (sql) => {
+            calls.push(sql);
+            return [];
+        }, "custom_campaigns");
+        await r.list({});
+        expect(calls[0]).toContain("FROM custom_campaigns");
+    });
+});
+
+describe("InMemoryCampaignStore re-export", () => {
+    it("is exported from the same module entry point", {
+        timeout: 5000,
+    }, () => {
+        expect(typeof InMemoryCampaignStore).toBe("function");
+        const store = new InMemoryCampaignStore();
+        expect(store).toBeInstanceOf(InMemoryCampaignStore);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/repositories/campaign/campaign.ts

@@ -0,0 +1,272 @@
+/**
+ * SurrealDB-backed implementation of the `CampaignStore` contract from
+ * `@suaveplan/campaigns`. Uses positional `$p0`/`$p1`/... placeholders
+ * against `SurrealAdapter.query` per the genesis idiom established by
+ * `@suaveplan/delivery-tracking`. The in-memory implementation is exposed
+ * as a re-export of `@suaveplan/campaigns` `InMemoryCampaignStore`.
+ */
+
+import type {
+    Campaign,
+    CampaignQuery,
+    CampaignStats,
+    CampaignStatus,
+    CampaignStore,
+    UpdateCampaignInput,
+} from "@suaveplan/campaigns";
+import { InMemoryCampaignStore } from "@suaveplan/campaigns";
+import z from "zod";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import type {
+    CampaignRow,
+    SurrealCampaignRepositoryOptions,
+} from "./campaign.types.js";
+
+/** Zod guard at the repository boundary for the `id` argument. */
+const IdSchema = z.string().min(1, "campaign id must be a non-empty string");
+
+/** Zod guard at the repository boundary for the listing `CampaignQuery`. */
+const CampaignQuerySchema = z
+    .object({
+        tenantId: z.string().min(1).optional(),
+        status: z.string().min(1).optional(),
+        type: z.string().min(1).optional(),
+        channel: z.string().min(1).optional(),
+        limit: z.number().int().min(1).max(1000).optional(),
+        offset: z.number().int().min(0).optional(),
+    })
+    .strict();
+
+function toDate(value: Date | string | null | undefined): Date | undefined {
+    if (value === null || value === undefined) return undefined;
+    return value instanceof Date ? value : new Date(value);
+}
+
+function rowToCampaign(row: CampaignRow): Campaign {
+    const templateId = row.template_id ?? undefined;
+    const templateData = row.template_data ?? undefined;
+    const schedule = (row.schedule ?? undefined) as Campaign["schedule"];
+    const throttle = (row.throttle ?? undefined) as Campaign["throttle"];
+    const abTestConfig = (row.ab_test_config ??
+        undefined) as Campaign["abTestConfig"];
+    const sentAt = toDate(row.sent_at);
+    const completedAt = toDate(row.completed_at);
+    return {
+        id: row.id,
+        tenantId: row.tenant_id,
+        name: row.name,
+        status: row.status as CampaignStatus,
+        type: row.type as Campaign["type"],
+        channel: row.channel,
+        audienceConfig: row.audience_config as Campaign["audienceConfig"],
+        ...(templateId !== undefined ? { templateId } : {}),
+        ...(templateData !== undefined ? { templateData } : {}),
+        ...(schedule !== undefined ? { schedule } : {}),
+        ...(throttle !== undefined ? { throttle } : {}),
+        ...(abTestConfig !== undefined ? { abTestConfig } : {}),
+        metadata: row.metadata ?? {},
+        stats: row.stats as CampaignStats,
+        createdAt: toDate(row.created_at) ?? new Date(0),
+        updatedAt: toDate(row.updated_at) ?? new Date(0),
+        ...(sentAt !== undefined ? { sentAt } : {}),
+        ...(completedAt !== undefined ? { completedAt } : {}),
+    };
+}
+
+/**
+ * SurrealDB-backed `CampaignStore`. All Surreal calls go through the
+ * adapter's `query` method with a positional parameter list so the SQL is
+ * auditable and identical across drivers. Errors are wrapped in
+ * `CampaignsApiError` with the appropriate `CAMPAIGNS_API.*` code so route
+ * handlers can branch on stable strings.
+ */
+export class SurrealCampaignRepository implements CampaignStore {
+    private readonly db: SurrealCampaignRepositoryOptions["db"];
+    private readonly table: string;
+
+    public constructor(options: SurrealCampaignRepositoryOptions) {
+        this.db = options.db;
+        this.table = options.table ?? "campaign";
+    }
+
+    public async create(campaign: Campaign): Promise<Campaign> {
+        const params: unknown[] = [
+            campaign.id,
+            campaign.tenantId,
+            campaign.name,
+            campaign.status,
+            campaign.type,
+            campaign.channel,
+            campaign.audienceConfig,
+            campaign.templateId ?? null,
+            campaign.templateData ?? null,
+            campaign.schedule ?? null,
+            campaign.throttle ?? null,
+            campaign.abTestConfig ?? null,
+            campaign.metadata,
+            campaign.stats,
+            campaign.createdAt,
+            campaign.updatedAt,
+            campaign.sentAt ?? null,
+            campaign.completedAt ?? null,
+        ];
+        const sql = `INSERT INTO ${this.table} {
+            id: $p0, tenant_id: $p1, name: $p2, status: $p3, type: $p4,
+            channel: $p5, audience_config: $p6, template_id: $p7,
+            template_data: $p8, schedule: $p9, throttle: $p10,
+            ab_test_config: $p11, metadata: $p12, stats: $p13,
+            created_at: $p14, updated_at: $p15, sent_at: $p16,
+            completed_at: $p17
+        }`;
+        await this.run<CampaignRow>(sql, params, "create");
+        return campaign;
+    }
+
+    public async getById(id: string): Promise<Campaign | null> {
+        const parsed = IdSchema.safeParse(id);
+        if (!parsed.success) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "campaign id is required",
+                { cause: parsed.error, context: { op: "getById" } }
+            );
+        }
+        const rows = await this.run<CampaignRow>(
+            `SELECT * FROM ${this.table} WHERE id = $p0 LIMIT 1`,
+            [id],
+            "getById"
+        );
+        return rows[0] !== undefined ? rowToCampaign(rows[0]) : null;
+    }
+
+    public async update(
+        id: string,
+        input: UpdateCampaignInput
+    ): Promise<Campaign> {
+        const sets: string[] = [];
+        const params: unknown[] = [id];
+        const push = (col: string, value: unknown): void => {
+            params.push(value);
+            sets.push(`${col} = $p${params.length - 1}`);
+        };
+        if (input.name !== undefined) push("name", input.name);
+        if (input.channel !== undefined) push("channel", input.channel);
+        if (input.audienceConfig !== undefined) {
+            push("audience_config", input.audienceConfig);
+        }
+        if (input.templateId !== undefined) {
+            push("template_id", input.templateId);
+        }
+        if (input.templateData !== undefined) {
+            push("template_data", input.templateData);
+        }
+        if (input.schedule !== undefined) push("schedule", input.schedule);
+        if (input.throttle !== undefined) push("throttle", input.throttle);
+        if (input.abTestConfig !== undefined) {
+            push("ab_test_config", input.abTestConfig);
+        }
+        if (input.metadata !== undefined) push("metadata", input.metadata);
+        if (sets.length === 0) {
+            const existing = await this.getById(id);
+            if (existing === null) throw this.notFound(id, "update");
+            return existing;
+        }
+        const sql = `UPDATE ${this.table} SET ${sets.join(", ")} WHERE id = $p0 RETURN AFTER`;
+        const rows = await this.run<CampaignRow>(sql, params, "update");
+        if (rows[0] === undefined) throw this.notFound(id, "update");
+        return rowToCampaign(rows[0]);
+    }
+
+    public async delete(id: string): Promise<boolean> {
+        const rows = await this.run<CampaignRow>(
+            `DELETE ${this.table} WHERE id = $p0 RETURN BEFORE`,
+            [id],
+            "delete"
+        );
+        return rows.length > 0;
+    }
+
+    public async list(query: CampaignQuery): Promise<Campaign[]> {
+        const parsed = CampaignQuerySchema.safeParse(query);
+        if (!parsed.success) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "invalid campaign query",
+                { cause: parsed.error, context: { op: "list" } }
+            );
+        }
+        const conditions: string[] = [];
+        const params: unknown[] = [];
+        const push = (col: string, value: unknown): void => {
+            params.push(value);
+            conditions.push(`${col} = $p${params.length - 1}`);
+        };
+        if (query.tenantId !== undefined) push("tenant_id", query.tenantId);
+        if (query.status !== undefined) push("status", query.status);
+        if (query.type !== undefined) push("type", query.type);
+        if (query.channel !== undefined) push("channel", query.channel);
+        const where =
+            conditions.length > 0 ? ` WHERE ${conditions.join(" AND ")}` : "";
+        const limit = query.limit ?? 50;
+        const offset = query.offset ?? 0;
+        let sql = `SELECT * FROM ${this.table}${where} LIMIT ${limit}`;
+        if (offset > 0) sql += ` START ${offset}`;
+        const rows = await this.run<CampaignRow>(sql, params, "list");
+        return rows.map(rowToCampaign);
+    }
+
+    public async updateStats(
+        id: string,
+        stats: Partial<CampaignStats>
+    ): Promise<Campaign> {
+        const rows = await this.run<CampaignRow>(
+            `UPDATE ${this.table} MERGE { stats: $p1 } WHERE id = $p0 RETURN AFTER`,
+            [id, stats],
+            "updateStats"
+        );
+        if (rows[0] === undefined) throw this.notFound(id, "updateStats");
+        return rowToCampaign(rows[0]);
+    }
+
+    public async updateStatus(
+        id: string,
+        status: CampaignStatus
+    ): Promise<Campaign> {
+        const rows = await this.run<CampaignRow>(
+            `UPDATE ${this.table} SET status = $p1 WHERE id = $p0 RETURN AFTER`,
+            [id, status],
+            "updateStatus"
+        );
+        if (rows[0] === undefined) throw this.notFound(id, "updateStatus");
+        return rowToCampaign(rows[0]);
+    }
+
+    private async run<T>(
+        sql: string,
+        params: unknown[],
+        op: string
+    ): Promise<T[]> {
+        try {
+            return await this.db.query<T>(sql, params);
+        } catch (cause) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.DB_UNAVAILABLE,
+                `SurrealCampaignRepository.${op} failed`,
+                { cause, context: { op } }
+            );
+        }
+    }
+
+    private notFound(id: string, op: string): CampaignsApiError {
+        return new CampaignsApiError(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+            `campaign not found: ${id}`,
+            { context: { op, id } }
+        );
+    }
+}
+
+export { InMemoryCampaignStore };

packages/api-stack/api/api-plugin-campaigns/src/repositories/campaign/campaign.types.ts

@@ -0,0 +1,49 @@
+/**
+ * Type definitions for the campaign repository module. Concentrated here
+ * so the implementation file stays under the 300-line hard cap and so
+ * external callers can `import type` without pulling in the SurrealDB
+ * adapter symbol.
+ */
+
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import type { Clock, LoggerLike } from "@suaveplan/types";
+
+/**
+ * Constructor bundle for {@link SurrealCampaignRepository}. `db` is the
+ * connected `SurrealAdapter`; `clock` is the injectable wall-clock used to
+ * stamp `updatedAt` on Surreal-side `MERGE` paths; `table` overrides the
+ * default `"campaign"` SurrealDB table name for test isolation.
+ */
+export interface SurrealCampaignRepositoryOptions {
+    readonly db: SurrealAdapter;
+    readonly clock: Clock;
+    readonly table?: string;
+    readonly logger?: LoggerLike;
+}
+
+/**
+ * Row shape returned by SurrealDB for the `campaign` table. The columns
+ * mirror the `@suaveplan/campaigns` `Campaign` interface but use
+ * SurrealDB-friendly null sentinels instead of `undefined` for optional
+ * fields, and Date strings on read.
+ */
+export interface CampaignRow {
+    id: string;
+    tenant_id: string;
+    name: string;
+    status: string;
+    type: string;
+    channel: string;
+    audience_config: unknown;
+    template_id?: string | null;
+    template_data?: Record<string, unknown> | null;
+    schedule?: unknown;
+    throttle?: unknown;
+    ab_test_config?: unknown;
+    metadata?: Record<string, unknown> | null;
+    stats: unknown;
+    created_at: Date | string;
+    updated_at: Date | string;
+    sent_at?: Date | string | null;
+    completed_at?: Date | string | null;
+}

packages/api-stack/api/api-plugin-campaigns/src/repositories/campaign/index.ts

@@ -0,0 +1,8 @@
+export {
+    InMemoryCampaignStore,
+    SurrealCampaignRepository,
+} from "./campaign.js";
+export type {
+    CampaignRow,
+    SurrealCampaignRepositoryOptions,
+} from "./campaign.types.js";

packages/api-stack/api/api-plugin-campaigns/src/repositories/index.ts

@@ -0,0 +1,24 @@
+export {
+    InMemoryCampaignStore,
+    SurrealCampaignRepository,
+} from "./campaign/campaign.js";
+export type {
+    CampaignRow,
+    SurrealCampaignRepositoryOptions,
+} from "./campaign/campaign.types.js";
+export {
+    CreateInputSchema as SuppressionCreateInputSchema,
+    QuerySchema as SuppressionQuerySchema,
+    SurrealCampaignSuppressionRepository,
+} from "./suppression/suppression.js";
+export type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionQuery,
+    CampaignSuppressionReason,
+    CampaignSuppressionRow,
+    CampaignSuppressionStore,
+    CreateCampaignSuppressionInput,
+    InMemoryCampaignSuppressionStoreOptions,
+    SurrealCampaignSuppressionRepositoryOptions,
+} from "./suppression/suppression.types.js";
+export { InMemoryCampaignSuppressionStore } from "./suppression/suppression-memory.js";

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/index.ts

@@ -0,0 +1,16 @@
+export {
+    CreateInputSchema,
+    QuerySchema,
+    SurrealCampaignSuppressionRepository,
+} from "./suppression.js";
+export type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionQuery,
+    CampaignSuppressionReason,
+    CampaignSuppressionRow,
+    CampaignSuppressionStore,
+    CreateCampaignSuppressionInput,
+    InMemoryCampaignSuppressionStoreOptions,
+    SurrealCampaignSuppressionRepositoryOptions,
+} from "./suppression.types.js";
+export { InMemoryCampaignSuppressionStore } from "./suppression-memory.js";

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression-internals.md

@@ -0,0 +1,88 @@
+# `repositories/suppression/suppression-internals`
+
+## Purpose
+
+This module owns the validation and mapping primitives shared by the two
+`CampaignSuppressionStore` implementations — `ReasonSchema`,
+`CreateInputSchema`, `QuerySchema`, the `requireTenant` guard, the
+`rowToEntry` row mapper, and the `validateCreate` wrapper. Keeping these
+helpers in a dedicated sibling module is what allows both the SurrealDB
+implementation (`./suppression.ts`) and the in-memory reference
+(`./suppression-memory.ts`) to stay under the 300-line hard cap without
+duplicating their entry-validation logic.
+
+## Features
+
+- `ReasonSchema` — Zod enum guard over the five canonical
+  `CampaignSuppressionReason` values (`unsubscribe`, `bounce`,
+  `complaint`, `manual`, `compliance`).
+- `CreateInputSchema` / `QuerySchema` — strict Zod object guards for the
+  two public input shapes.
+- `requireTenant(tenantId)` — boundary check that throws
+  `CAMPAIGNS_API.TENANT_REQUIRED` for an empty string.
+- `validateCreate(input)` — parses with `CreateInputSchema` and throws
+  `CAMPAIGNS_API.INVALID_INPUT` on failure with the underlying `ZodError`
+  attached as `cause`.
+- `rowToEntry(row)` — maps `CampaignSuppressionRow` ↔ `CampaignSuppressionEntry`
+  with `Date` normalisation and `null` → `undefined` collapsing.
+
+## Usage: Basic
+
+```ts
+import { validateCreate, requireTenant } from "./suppression-internals.js";
+
+requireTenant("tenant-1");
+const data = validateCreate({
+    tenantId: "tenant-1",
+    channel: "email",
+    channelValue: "user@example.com",
+    reason: "unsubscribe",
+});
+```
+
+## Usage: Advanced
+
+```ts
+import { QuerySchema, rowToEntry } from "./suppression-internals.js";
+
+const parsed = QuerySchema.safeParse({
+    tenantId: "t1",
+    channel: "sms",
+    limit: 25,
+});
+if (!parsed.success) {
+    // handle ZodError without going through the repository
+}
+
+const entry = rowToEntry({
+    id: "s1",
+    tenant_id: "t1",
+    channel: "sms",
+    channel_value: "+15551234567",
+    reason: "complaint",
+    metadata: null,
+    created_at: "2026-05-24T00:00:00.000Z",
+});
+```
+
+## API Reference
+
+- `const ReasonSchema: z.ZodEnum`
+- `const CreateInputSchema: z.ZodObject`
+- `const QuerySchema: z.ZodObject`
+- `function requireTenant(tenantId: string): void` — throws on empty.
+- `function rowToEntry(row: CampaignSuppressionRow): CampaignSuppressionEntry`
+- `function validateCreate(input: CreateCampaignSuppressionInput): CreateCampaignSuppressionInput`
+
+## Implementation Notes
+
+`CreateInputSchema` and `QuerySchema` use `.strict()` so unknown keys
+fail validation rather than silently flowing through to SurrealDB —
+this keeps the repository contract honest against evolving HTTP payloads
+and stops typos from becoming silent feature requests.
+
+The schemas live here (not in `../../schemas/`) because they are
+implementation details of the suppression repository, not part of the
+plugin's public option surface. The plugin's `options` schema in
+`../../schemas/options.ts` is the user-facing configuration contract; the
+repository schemas are private guards at a different boundary.

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression-internals.ts

@@ -0,0 +1,106 @@
+/**
+ * Internal helpers shared by `SurrealCampaignSuppressionRepository` and
+ * `InMemoryCampaignSuppressionStore`: Zod schemas guarding the
+ * repository boundary, the tenant-presence check, the row → entry
+ * mapper, and the `validateCreate` helper. Kept in a sibling module
+ * rather than inlined so each implementation file stays under the
+ * 300-line hard cap.
+ */
+
+import z from "zod";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionReason,
+    CampaignSuppressionRow,
+    CreateCampaignSuppressionInput,
+} from "./suppression.types.js";
+
+/** Zod enum guard for `CampaignSuppressionReason`. */
+export const ReasonSchema = z.enum([
+    "unsubscribe",
+    "bounce",
+    "complaint",
+    "manual",
+    "compliance",
+]);
+
+/** Zod guard for `CreateCampaignSuppressionInput`. */
+export const CreateInputSchema = z
+    .object({
+        tenantId: z.string().min(1, "tenantId is required"),
+        channel: z.string().min(1, "channel is required"),
+        channelValue: z.string().min(1, "channelValue is required"),
+        reason: ReasonSchema,
+        source: z.string().optional(),
+        metadata: z.record(z.string(), z.unknown()).optional(),
+    })
+    .strict();
+
+/** Zod guard for `CampaignSuppressionQuery`. */
+export const QuerySchema = z
+    .object({
+        tenantId: z.string().min(1, "tenantId is required"),
+        channel: z.string().min(1).optional(),
+        reason: ReasonSchema.optional(),
+        limit: z.number().int().min(1).max(1000).optional(),
+        offset: z.number().int().min(0).optional(),
+    })
+    .strict();
+
+/** Throws `TENANT_REQUIRED` when `tenantId` is the empty string. */
+export function requireTenant(tenantId: string): void {
+    if (tenantId.length === 0) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED,
+            "tenantId is required"
+        );
+    }
+}
+
+/** Maps a Surreal row to a domain `CampaignSuppressionEntry`. */
+export function rowToEntry(
+    row: CampaignSuppressionRow
+): CampaignSuppressionEntry {
+    const source = row.source ?? undefined;
+    const metadata = row.metadata ?? undefined;
+    return {
+        id: row.id,
+        tenantId: row.tenant_id,
+        channel: row.channel,
+        channelValue: row.channel_value,
+        reason: row.reason as CampaignSuppressionReason,
+        ...(source !== undefined ? { source } : {}),
+        ...(metadata !== undefined ? { metadata } : {}),
+        createdAt:
+            row.created_at instanceof Date
+                ? row.created_at
+                : new Date(row.created_at),
+    };
+}
+
+/** Validates a create-input or throws `INVALID_INPUT`. */
+export function validateCreate(
+    input: CreateCampaignSuppressionInput
+): CreateCampaignSuppressionInput {
+    const parsed = CreateInputSchema.safeParse(input);
+    if (!parsed.success) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INVALID_INPUT,
+            "invalid suppression input",
+            { cause: parsed.error, context: { op: "add" } }
+        );
+    }
+    const data = parsed.data;
+    return {
+        tenantId: data.tenantId,
+        channel: data.channel,
+        channelValue: data.channelValue,
+        reason: data.reason,
+        ...(data.source !== undefined ? { source: data.source } : {}),
+        ...(data.metadata !== undefined ? { metadata: data.metadata } : {}),
+    };
+}

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression-memory.md

@@ -0,0 +1,92 @@
+# `repositories/suppression/suppression-memory`
+
+## Purpose
+
+In-memory reference implementation of the tenant + channel-scoped
+`CampaignSuppressionStore` interface. Intended for unit tests, prototype
+workloads, and the default in-process backend before a SurrealDB
+connection is wired up. Mirrors the public surface of the SurrealDB
+implementation byte-for-byte so swapping between the two is a pure
+constructor change.
+
+Records are stored in a `Map` keyed by entry id; every read returns a
+shallow clone so callers cannot mutate internal records by reference.
+The implementation shares its Zod boundary guards with the SurrealDB
+repository via `./suppression-internals.ts`, ensuring both
+implementations reject invalid inputs identically.
+
+## Features
+
+- `Map`-backed storage with O(1) lookups by id and linear scans for
+  `(tenantId, channel, channelValue)` checks.
+- Defensive cloning on read — `{ ...entry }` everywhere a record leaves
+  the store.
+- Duplicate detection against the `(tenantId, channel, channelValue)`
+  triple — throws `CAMPAIGNS_API.DUPLICATE_SUPPRESSION` rather than
+  silently overwriting.
+- Injectable `Clock` for `createdAt` stamping and `IdGenerator` for entry
+  ids so tests can produce deterministic fixtures.
+
+## Usage: Basic
+
+```ts
+import { InMemoryCampaignSuppressionStore } from "@suaveplan/api-plugin-campaigns/repositories/suppression/suppression";
+
+const store = new InMemoryCampaignSuppressionStore({
+    clock: () => Date.now(),
+    idGenerator: () => crypto.randomUUID(),
+});
+
+await store.add({
+    tenantId: "t1",
+    channel: "email",
+    channelValue: "user@example.com",
+    reason: "unsubscribe",
+});
+```
+
+## Usage: Advanced
+
+```ts
+import { InMemoryCampaignSuppressionStore } from "@suaveplan/api-plugin-campaigns/repositories/suppression/suppression";
+
+let now = 1_700_000_000_000;
+let n = 0;
+const store = new InMemoryCampaignSuppressionStore({
+    clock: () => now,
+    idGenerator: () => `s-${n++}`,
+});
+
+await store.add({
+    tenantId: "t1",
+    channel: "sms",
+    channelValue: "+15551234567",
+    reason: "complaint",
+});
+const entries = await store.list({ tenantId: "t1", channel: "sms" });
+```
+
+## API Reference
+
+- `class InMemoryCampaignSuppressionStore implements CampaignSuppressionStore`
+  - `new InMemoryCampaignSuppressionStore({ clock, idGenerator })`
+  - `add`, `remove`, `check`, `list`, `count`, `removeByChannelValue` —
+    all match the interface signature exactly.
+
+## Implementation Notes
+
+The constructor is deliberately required-arguments (no defaults) so
+unit tests never accidentally rely on the wall-clock or
+`crypto.randomUUID`. This mirrors the rest of Suaveplan's
+convention for injectable seams: opt-in only, never magical.
+
+The duplicate-check is performed by re-using `check()` rather than a
+separate code path so the in-memory and SurrealDB implementations share
+identical duplicate-detection semantics — a regression in one is a
+regression in the other, and the test suite picks it up immediately.
+
+This module intentionally re-uses the `QuerySchema` from
+`./suppression-internals.ts` rather than re-parsing inline; the schema
+is treated as the single source of truth for input validation across
+both backends, and any drift between in-memory and SurrealDB behaviour
+is detectable by reading just one file.

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression-memory.test.ts

@@ -0,0 +1,306 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CAMPAIGNS_API_CODES,
+    type CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { InMemoryCampaignSuppressionStore } from "./suppression-memory.js";
+
+function store(): InMemoryCampaignSuppressionStore {
+    let n = 0;
+    return new InMemoryCampaignSuppressionStore({
+        clock: () => 1_700_000_000_000,
+        idGenerator: () => `mem-${n++}`,
+    });
+}
+
+describe("InMemoryCampaignSuppressionStore.add + check + remove", () => {
+    it("adds and checks an entry round-trip", { timeout: 5000 }, async () => {
+        const s = store();
+        const entry = await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        expect(entry.id).toBe("mem-0");
+        const found = await s.check("t1", "email", "u@e.com");
+        expect(found?.id).toBe("mem-0");
+    });
+
+    it("returns a defensive clone from check + add", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        const added = await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        const a = await s.check("t1", "email", "u@e.com");
+        expect(a).not.toBe(added);
+    });
+
+    it("returns null on miss", { timeout: 5000 }, async () => {
+        const s = store();
+        expect(await s.check("t1", "email", "nope@e.com")).toBeNull();
+    });
+
+    it("rejects duplicate (tenant, channel, value) with DUPLICATE_SUPPRESSION", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        let captured: unknown;
+        try {
+            await s.add({
+                tenantId: "t1",
+                channel: "email",
+                channelValue: "u@e.com",
+                reason: "bounce",
+            });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION
+        );
+    });
+
+    it("remove returns true once then false", { timeout: 5000 }, async () => {
+        const s = store();
+        const entry = await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        expect(await s.remove(entry.id)).toBe(true);
+        expect(await s.remove(entry.id)).toBe(false);
+    });
+
+    it("remove rejects an empty id with INVALID_INPUT", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.remove("");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("add rejects invalid input via the shared schema", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.add({
+                tenantId: "",
+                channel: "email",
+                channelValue: "u@e.com",
+                reason: "unsubscribe",
+            });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("check rejects an empty tenantId with TENANT_REQUIRED", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.check("", "email", "u@e.com");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+});
+
+describe("InMemoryCampaignSuppressionStore.list + count + removeByChannelValue", () => {
+    it("lists entries scoped to a tenant", { timeout: 5000 }, async () => {
+        const s = store();
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "a@e.com",
+            reason: "unsubscribe",
+        });
+        await s.add({
+            tenantId: "t1",
+            channel: "sms",
+            channelValue: "+1",
+            reason: "complaint",
+        });
+        await s.add({
+            tenantId: "t2",
+            channel: "email",
+            channelValue: "b@e.com",
+            reason: "manual",
+        });
+        const all = await s.list({ tenantId: "t1" });
+        expect(all).toHaveLength(2);
+        const onlyEmail = await s.list({ tenantId: "t1", channel: "email" });
+        expect(onlyEmail).toHaveLength(1);
+        expect(onlyEmail[0]!.channel).toBe("email");
+        const onlyComplaint = await s.list({
+            tenantId: "t1",
+            reason: "complaint",
+        });
+        expect(onlyComplaint).toHaveLength(1);
+    });
+
+    it("paginates via limit + offset", { timeout: 5000 }, async () => {
+        const s = store();
+        for (let i = 0; i < 5; i++) {
+            await s.add({
+                tenantId: "t1",
+                channel: "email",
+                channelValue: `u${i}@e.com`,
+                reason: "unsubscribe",
+            });
+        }
+        const page = await s.list({ tenantId: "t1", limit: 2, offset: 2 });
+        expect(page).toHaveLength(2);
+    });
+
+    it("rejects invalid list query (negative offset)", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.list({ tenantId: "t1", offset: -1 });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("count scopes by tenant", { timeout: 5000 }, async () => {
+        const s = store();
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "a@e.com",
+            reason: "unsubscribe",
+        });
+        await s.add({
+            tenantId: "t2",
+            channel: "email",
+            channelValue: "b@e.com",
+            reason: "unsubscribe",
+        });
+        expect(await s.count("t1")).toBe(1);
+        expect(await s.count("t2")).toBe(1);
+        expect(await s.count("t3")).toBe(0);
+    });
+
+    it("count rejects an empty tenantId", { timeout: 5000 }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.count("");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("removeByChannelValue deletes and returns true; false on miss", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        expect(await s.removeByChannelValue("t1", "email", "u@e.com")).toBe(
+            true
+        );
+        expect(await s.removeByChannelValue("t1", "email", "u@e.com")).toBe(
+            false
+        );
+    });
+
+    it("removeByChannelValue iterates past non-matching entries", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "a@e.com",
+            reason: "unsubscribe",
+        });
+        await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "b@e.com",
+            reason: "unsubscribe",
+        });
+        // first entry doesn't match `b@e.com`; deletion targets the second
+        expect(await s.removeByChannelValue("t1", "email", "b@e.com")).toBe(
+            true
+        );
+        expect(await s.list({ tenantId: "t1" })).toHaveLength(1);
+    });
+
+    it("add persists source and metadata when present", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        const entry = await s.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+            source: "ops",
+            metadata: { ip: "1.2.3.4" },
+        });
+        expect(entry.source).toBe("ops");
+        expect(entry.metadata).toEqual({ ip: "1.2.3.4" });
+        const found = await s.check("t1", "email", "u@e.com");
+        expect(found?.source).toBe("ops");
+        expect(found?.metadata).toEqual({ ip: "1.2.3.4" });
+    });
+
+    it("removeByChannelValue rejects an empty tenantId", {
+        timeout: 5000,
+    }, async () => {
+        const s = store();
+        let captured: unknown;
+        try {
+            await s.removeByChannelValue("", "email", "u@e.com");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression-memory.ts

@@ -0,0 +1,150 @@
+/**
+ * In-memory reference implementation of the local
+ * `CampaignSuppressionStore` interface. Intended for unit tests and
+ * prototype workloads — every mutation returns a fresh object so callers
+ * cannot tamper with internal records by reference.
+ */
+
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionQuery,
+    CampaignSuppressionStore,
+    CreateCampaignSuppressionInput,
+    InMemoryCampaignSuppressionStoreOptions,
+} from "./suppression.types.js";
+import {
+    QuerySchema,
+    requireTenant,
+    validateCreate,
+} from "./suppression-internals.js";
+
+/** Reference `CampaignSuppressionStore` backed by a `Map`. */
+export class InMemoryCampaignSuppressionStore
+    implements CampaignSuppressionStore
+{
+    private readonly entries = new Map<string, CampaignSuppressionEntry>();
+    private readonly clock: InMemoryCampaignSuppressionStoreOptions["clock"];
+    private readonly idGenerator: InMemoryCampaignSuppressionStoreOptions["idGenerator"];
+
+    public constructor(options: InMemoryCampaignSuppressionStoreOptions) {
+        this.clock = options.clock;
+        this.idGenerator = options.idGenerator;
+    }
+
+    public async add(
+        input: CreateCampaignSuppressionInput
+    ): Promise<CampaignSuppressionEntry> {
+        const data = validateCreate(input);
+        const existing = await this.check(
+            data.tenantId,
+            data.channel,
+            data.channelValue
+        );
+        if (existing !== null) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION,
+                `suppression already exists for ${data.channel}:${data.channelValue}`,
+                { context: { op: "add", existingId: existing.id } }
+            );
+        }
+        const entry: CampaignSuppressionEntry = {
+            id: this.idGenerator(),
+            tenantId: data.tenantId,
+            channel: data.channel,
+            channelValue: data.channelValue,
+            reason: data.reason,
+            ...(data.source !== undefined ? { source: data.source } : {}),
+            ...(data.metadata !== undefined ? { metadata: data.metadata } : {}),
+            createdAt: new Date(this.clock()),
+        };
+        this.entries.set(entry.id, entry);
+        return { ...entry };
+    }
+
+    public async remove(id: string): Promise<boolean> {
+        if (id.length === 0) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "suppression id is required"
+            );
+        }
+        return this.entries.delete(id);
+    }
+
+    public async check(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<CampaignSuppressionEntry | null> {
+        requireTenant(tenantId);
+        for (const entry of this.entries.values()) {
+            if (
+                entry.tenantId === tenantId &&
+                entry.channel === channel &&
+                entry.channelValue === channelValue
+            ) {
+                return { ...entry };
+            }
+        }
+        return null;
+    }
+
+    public async list(
+        query: CampaignSuppressionQuery
+    ): Promise<readonly CampaignSuppressionEntry[]> {
+        const parsed = QuerySchema.safeParse(query);
+        if (!parsed.success) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "invalid suppression query",
+                { cause: parsed.error, context: { op: "list" } }
+            );
+        }
+        let results = Array.from(this.entries.values()).filter(
+            (e) => e.tenantId === parsed.data.tenantId
+        );
+        if (parsed.data.channel !== undefined) {
+            const ch = parsed.data.channel;
+            results = results.filter((e) => e.channel === ch);
+        }
+        if (parsed.data.reason !== undefined) {
+            const rsn = parsed.data.reason;
+            results = results.filter((e) => e.reason === rsn);
+        }
+        const limit = parsed.data.limit ?? 50;
+        const offset = parsed.data.offset ?? 0;
+        return results.slice(offset, offset + limit).map((e) => ({ ...e }));
+    }
+
+    public async count(tenantId: string): Promise<number> {
+        requireTenant(tenantId);
+        let n = 0;
+        for (const e of this.entries.values()) {
+            if (e.tenantId === tenantId) n++;
+        }
+        return n;
+    }
+
+    public async removeByChannelValue(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<boolean> {
+        requireTenant(tenantId);
+        for (const [id, entry] of this.entries.entries()) {
+            if (
+                entry.tenantId === tenantId &&
+                entry.channel === channel &&
+                entry.channelValue === channelValue
+            ) {
+                this.entries.delete(id);
+                return true;
+            }
+        }
+        return false;
+    }
+}

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression.md

@@ -0,0 +1,120 @@
+# `repositories/suppression`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module owns the SurrealDB-backed implementation of the tenant +
+channel-scoped `CampaignSuppressionStore` interface for
+`@suaveplan/api-plugin-campaigns`. It tracks contacts who should be
+excluded from a tenant's campaign sends — for example because they
+unsubscribed, hard-bounced, complained, or were manually opted out.
+
+The local interface is intentional and not a wrapper over
+`@suaveplan/suppression`: the suaveplan suppression package is email-only
+and keyed on `(tenantId, channelValue)`, while a campaigns plugin must
+support multi-channel delivery (email, SMS, push, ...). The
+`(tenantId, channel, channelValue)` triple is therefore the natural
+primary key, with `channel = "email"` representing the legacy case.
+
+## Features
+
+- Positional SurQL parameter binding (`$p0`, `$p1`, ...) per the suaveplan
+  Surreal idiom.
+- Snake-case ↔ camelCase column mapping isolated in `rowToEntry` from
+  `./suppression-internals.ts`.
+- Application-layer duplicate detection — `add` issues a `check` before
+  the INSERT and throws `CAMPAIGNS_API.DUPLICATE_SUPPRESSION` if the
+  triple already exists.
+- Zod-guarded input boundaries (`CreateInputSchema`, `QuerySchema`) so
+  invalid HTTP payloads fail with `CAMPAIGNS_API.INVALID_INPUT` before
+  any SurQL is issued.
+- Errors wrapped with stable `CAMPAIGNS_API.*` codes (`DB_UNAVAILABLE`,
+  `INVALID_INPUT`, `TENANT_REQUIRED`, `DUPLICATE_SUPPRESSION`).
+
+## Usage: Basic
+
+```ts
+import { SurrealCampaignSuppressionRepository } from "@suaveplan/api-plugin-campaigns/repositories/suppression/suppression";
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+
+declare const db: SurrealAdapter;
+const store = new SurrealCampaignSuppressionRepository({
+    db,
+    clock: () => Date.now(),
+    idGenerator: () => crypto.randomUUID(),
+});
+
+await store.add({
+    tenantId: "t1",
+    channel: "email",
+    channelValue: "user@example.com",
+    reason: "unsubscribe",
+});
+
+const blocked = await store.check("t1", "email", "user@example.com");
+```
+
+## Usage: Advanced
+
+```ts
+import { SurrealCampaignSuppressionRepository } from "@suaveplan/api-plugin-campaigns/repositories/suppression/suppression";
+import { CAMPAIGNS_API_CODES, CampaignsApiError } from "@suaveplan/api-plugin-campaigns";
+
+const store = new SurrealCampaignSuppressionRepository({
+    db,
+    clock: () => Date.now(),
+    idGenerator: () => crypto.randomUUID(),
+    table: "campaign_suppression_v2",
+});
+
+try {
+    await store.add({
+        tenantId: "t1",
+        channel: "sms",
+        channelValue: "+15551234567",
+        reason: "complaint",
+    });
+} catch (err) {
+    if (
+        err instanceof CampaignsApiError &&
+        err.code === CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION
+    ) {
+        // ... already suppressed, treat as success
+    }
+}
+```
+
+## API Reference
+
+- `interface CampaignSuppressionStore` — local persistence contract:
+  `add`, `remove`, `check`, `list`, `count`, `removeByChannelValue`.
+- `class SurrealCampaignSuppressionRepository implements CampaignSuppressionStore`
+  - `new SurrealCampaignSuppressionRepository({ db, clock, idGenerator, table?, logger? })`
+- `interface CampaignSuppressionEntry` — domain row shape.
+- `type CampaignSuppressionReason` — one of `"unsubscribe"`, `"bounce"`,
+  `"complaint"`, `"manual"`, `"compliance"`.
+- `const CreateInputSchema`, `const QuerySchema` — re-exported Zod
+  schemas for callers who want to validate at a different boundary.
+
+## Implementation Notes
+
+The local interface is intentional and is NOT a wrapper over
+`@suaveplan/suppression` — that package is email-only and would force a
+lossy mapping. The repository uses `channel` as a first-class column so a
+single tenant can suppress different addresses on different channels
+without collision.
+
+The Surreal `add` issues an application-layer `check` before the
+INSERT. A Surreal-side `UNIQUE INDEX` on `(tenant_id, channel,
+channel_value)` is recommended as defence in depth, but the application
+check is the primary gate — it gives us a clean
+`CAMPAIGNS_API.DUPLICATE_SUPPRESSION` error rather than a driver-specific
+constraint violation that would have to be string-matched.
+
+Errors are wrapped via the `run<T>` helper, which uniformly turns
+adapter exceptions into `CampaignsApiError(DB_UNAVAILABLE)` with the
+operation name attached as `context.op`. This keeps the failure modes
+auditable from logs without leaking driver internals.

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression.test.ts

@@ -0,0 +1,380 @@
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CAMPAIGNS_API_CODES,
+    type CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import {
+    CreateInputSchema,
+    QuerySchema,
+    SurrealCampaignSuppressionRepository,
+} from "./suppression.js";
+
+type QueryFn = (sql: string, params?: readonly unknown[]) => Promise<unknown>;
+
+function adapter(queryFn: QueryFn): SurrealAdapter {
+    return { query: queryFn } as unknown as SurrealAdapter;
+}
+
+function row(over: Record<string, unknown> = {}): Record<string, unknown> {
+    return {
+        id: "s1",
+        tenant_id: "t1",
+        channel: "email",
+        channel_value: "u@e.com",
+        reason: "unsubscribe",
+        source: null,
+        metadata: null,
+        created_at: "2026-01-01T00:00:00.000Z",
+        ...over,
+    };
+}
+
+function repo(
+    queryFn: QueryFn,
+    over: { clock?: () => number; id?: () => string; table?: string } = {}
+): SurrealCampaignSuppressionRepository {
+    let n = 0;
+    return new SurrealCampaignSuppressionRepository({
+        db: adapter(queryFn),
+        clock: over.clock ?? (() => 1_700_000_000_000),
+        idGenerator: over.id ?? (() => `gen-${n++}`),
+        table: over.table,
+    });
+}
+
+describe("SurrealCampaignSuppressionRepository.add", () => {
+    it("validates input and inserts when not already suppressed", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            // first call is the SELECT in check(); return empty
+            if (sql.startsWith("SELECT")) return [];
+            return [];
+        });
+        const entry = await r.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+            source: "user-action",
+            metadata: { foo: "bar" },
+        });
+        expect(entry.id).toBe("gen-0");
+        expect(entry.tenantId).toBe("t1");
+        expect(entry.createdAt).toBeInstanceOf(Date);
+        expect(calls[1]!.sql).toContain("INSERT INTO campaign_suppression");
+        expect(calls[1]!.params[0]).toBe("gen-0");
+        expect(calls[1]!.params[5]).toBe("user-action");
+        expect(calls[1]!.params[6]).toEqual({ foo: "bar" });
+    });
+
+    it("nulls absent source and metadata in the positional params", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            if (sql.startsWith("INSERT")) {
+                calls.push({ params: params ?? [] });
+            }
+            return [];
+        });
+        await r.add({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+        });
+        expect(calls[0]!.params[5]).toBeNull();
+        expect(calls[0]!.params[6]).toBeNull();
+    });
+
+    it("throws DUPLICATE_SUPPRESSION when check() returns an existing entry", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async (sql) => {
+            if (sql.startsWith("SELECT")) return [row({ id: "existing" })];
+            return [];
+        });
+        let captured: unknown;
+        try {
+            await r.add({
+                tenantId: "t1",
+                channel: "email",
+                channelValue: "u@e.com",
+                reason: "unsubscribe",
+            });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION
+        );
+    });
+
+    it("throws INVALID_INPUT for missing tenantId", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.add({
+                tenantId: "",
+                channel: "email",
+                channelValue: "u@e.com",
+                reason: "unsubscribe",
+            });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("wraps adapter errors during INSERT in DB_UNAVAILABLE", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async (sql) => {
+            if (sql.startsWith("SELECT")) return [];
+            throw new Error("driver-down");
+        });
+        let captured: unknown;
+        try {
+            await r.add({
+                tenantId: "t1",
+                channel: "email",
+                channelValue: "u@e.com",
+                reason: "unsubscribe",
+            });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.DB_UNAVAILABLE
+        );
+    });
+});
+
+describe("SurrealCampaignSuppressionRepository.remove + check", () => {
+    it("remove returns true when DELETE returns a row", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => [row()]);
+        expect(await r.remove("s1")).toBe(true);
+    });
+
+    it("remove returns false when DELETE returns nothing", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        expect(await r.remove("s1")).toBe(false);
+    });
+
+    it("remove rejects an empty id with INVALID_INPUT", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.remove("");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("check returns null when no row matches", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        expect(await r.check("t1", "email", "u@e.com")).toBeNull();
+    });
+
+    it("check maps a row and binds the triple positionally", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { params: readonly unknown[] }[] = [];
+        const r = repo(async (_sql, params) => {
+            calls.push({ params: params ?? [] });
+            return [row({ source: "x", metadata: { y: 1 } })];
+        });
+        const entry = await r.check("t1", "email", "u@e.com");
+        expect(entry?.id).toBe("s1");
+        expect(entry?.source).toBe("x");
+        expect(entry?.metadata).toEqual({ y: 1 });
+        expect(entry?.createdAt).toBeInstanceOf(Date);
+        expect(calls[0]!.params).toEqual(["t1", "email", "u@e.com"]);
+    });
+
+    it("check preserves a Date timestamp from the row", {
+        timeout: 5000,
+    }, async () => {
+        const ts = new Date("2026-04-01T00:00:00.000Z");
+        const r = repo(async () => [row({ created_at: ts })]);
+        const entry = await r.check("t1", "email", "u@e.com");
+        expect(entry?.createdAt).toEqual(ts);
+    });
+
+    it("check rejects an empty tenantId with TENANT_REQUIRED", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.check("", "email", "u@e.com");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+});
+
+describe("SurrealCampaignSuppressionRepository.list + count + removeByChannelValue", () => {
+    it("list threads filters + paging into SQL positionally", {
+        timeout: 5000,
+    }, async () => {
+        const calls: { sql: string; params: readonly unknown[] }[] = [];
+        const r = repo(async (sql, params) => {
+            calls.push({ sql, params: params ?? [] });
+            return [row(), row({ id: "s2" })];
+        });
+        const result = await r.list({
+            tenantId: "t1",
+            channel: "email",
+            reason: "bounce",
+            limit: 10,
+            offset: 5,
+        });
+        expect(result).toHaveLength(2);
+        expect(calls[0]!.sql).toContain("tenant_id = $p0");
+        expect(calls[0]!.sql).toContain("channel = $p1");
+        expect(calls[0]!.sql).toContain("reason = $p2");
+        expect(calls[0]!.sql).toContain("LIMIT 10");
+        expect(calls[0]!.sql).toContain("START 5");
+    });
+
+    it("list applies defaults and omits START when offset is 0", {
+        timeout: 5000,
+    }, async () => {
+        const calls: string[] = [];
+        const r = repo(async (sql) => {
+            calls.push(sql);
+            return [];
+        });
+        await r.list({ tenantId: "t1" });
+        expect(calls[0]).toContain("LIMIT 50");
+        expect(calls[0]).not.toContain("START");
+    });
+
+    it("list rejects invalid query (missing tenantId)", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.list({ tenantId: "" });
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_INPUT
+        );
+    });
+
+    it("count returns the GROUP ALL count or zero", {
+        timeout: 5000,
+    }, async () => {
+        const a = repo(async () => [{ count: 3 }]);
+        expect(await a.count("t1")).toBe(3);
+        const b = repo(async () => []);
+        expect(await b.count("t1")).toBe(0);
+    });
+
+    it("count rejects an empty tenantId", { timeout: 5000 }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.count("");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("removeByChannelValue returns true when DELETE returns a row", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => [row()]);
+        expect(await r.removeByChannelValue("t1", "email", "u@e.com")).toBe(
+            true
+        );
+    });
+
+    it("removeByChannelValue returns false when DELETE returns nothing", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        expect(await r.removeByChannelValue("t1", "email", "u@e.com")).toBe(
+            false
+        );
+    });
+
+    it("removeByChannelValue rejects an empty tenantId", {
+        timeout: 5000,
+    }, async () => {
+        const r = repo(async () => []);
+        let captured: unknown;
+        try {
+            await r.removeByChannelValue("", "email", "u@e.com");
+        } catch (e) {
+            captured = e;
+        }
+        expect((captured as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("respects a custom table name on every operation", {
+        timeout: 5000,
+    }, async () => {
+        const calls: string[] = [];
+        const r = repo(
+            async (sql) => {
+                calls.push(sql);
+                return [];
+            },
+            { table: "custom_supp" }
+        );
+        await r.list({ tenantId: "t1" });
+        expect(calls[0]).toContain("FROM custom_supp");
+    });
+});
+
+describe("Re-exported schemas", () => {
+    it("CreateInputSchema rejects unknown keys", { timeout: 5000 }, () => {
+        const r = CreateInputSchema.safeParse({
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "u@e.com",
+            reason: "unsubscribe",
+            unknown: "boom",
+        });
+        expect(r.success).toBe(false);
+    });
+
+    it("QuerySchema accepts a minimal valid input", {
+        timeout: 5000,
+    }, () => {
+        const r = QuerySchema.safeParse({ tenantId: "t1" });
+        expect(r.success).toBe(true);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression.ts

@@ -0,0 +1,213 @@
+/**
+ * SurrealDB-backed implementation of the tenant + channel-scoped
+ * `CampaignSuppressionStore` interface for
+ * `@suaveplan/api-plugin-campaigns`. The local interface (and its
+ * in-memory reference implementation in `./suppression-memory.ts`) is
+ * intentionally channel-scoped: the genesis `@suaveplan/suppression`
+ * package is email-only and does not fit the multi-channel campaigns
+ * domain.
+ */
+
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import type {
+    CampaignSuppressionEntry,
+    CampaignSuppressionQuery,
+    CampaignSuppressionRow,
+    CampaignSuppressionStore,
+    CreateCampaignSuppressionInput,
+    SurrealCampaignSuppressionRepositoryOptions,
+} from "./suppression.types.js";
+import {
+    CreateInputSchema,
+    QuerySchema,
+    requireTenant,
+    rowToEntry,
+    validateCreate,
+} from "./suppression-internals.js";
+
+/**
+ * SurrealDB-backed `CampaignSuppressionStore`. Uses positional `$p0/$p1`
+ * parameters and wraps adapter errors in `CampaignsApiError` with the
+ * `DB_UNAVAILABLE` code. Duplicate `(tenant, channel, value)` adds are
+ * rejected at the application layer with `DUPLICATE_SUPPRESSION` so the
+ * Surreal-side unique index is defence-in-depth rather than the primary
+ * gate.
+ */
+export class SurrealCampaignSuppressionRepository
+    implements CampaignSuppressionStore
+{
+    private readonly db: SurrealCampaignSuppressionRepositoryOptions["db"];
+    private readonly clock: SurrealCampaignSuppressionRepositoryOptions["clock"];
+    private readonly idGenerator: SurrealCampaignSuppressionRepositoryOptions["idGenerator"];
+    private readonly table: string;
+
+    public constructor(options: SurrealCampaignSuppressionRepositoryOptions) {
+        this.db = options.db;
+        this.clock = options.clock;
+        this.idGenerator = options.idGenerator;
+        this.table = options.table ?? "campaign_suppression";
+    }
+
+    public async add(
+        input: CreateCampaignSuppressionInput
+    ): Promise<CampaignSuppressionEntry> {
+        const data = validateCreate(input);
+        const existing = await this.check(
+            data.tenantId,
+            data.channel,
+            data.channelValue
+        );
+        if (existing !== null) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.DUPLICATE_SUPPRESSION,
+                `suppression already exists for ${data.channel}:${data.channelValue}`,
+                { context: { op: "add", existingId: existing.id } }
+            );
+        }
+        const entry: CampaignSuppressionEntry = {
+            id: this.idGenerator(),
+            tenantId: data.tenantId,
+            channel: data.channel,
+            channelValue: data.channelValue,
+            reason: data.reason,
+            ...(data.source !== undefined ? { source: data.source } : {}),
+            ...(data.metadata !== undefined ? { metadata: data.metadata } : {}),
+            createdAt: new Date(this.clock()),
+        };
+        const sql = `INSERT INTO ${this.table} {
+            id: $p0, tenant_id: $p1, channel: $p2, channel_value: $p3,
+            reason: $p4, source: $p5, metadata: $p6, created_at: $p7
+        }`;
+        await this.run<CampaignSuppressionRow>(
+            sql,
+            [
+                entry.id,
+                entry.tenantId,
+                entry.channel,
+                entry.channelValue,
+                entry.reason,
+                entry.source ?? null,
+                entry.metadata ?? null,
+                entry.createdAt,
+            ],
+            "add"
+        );
+        return entry;
+    }
+
+    public async remove(id: string): Promise<boolean> {
+        if (id.length === 0) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "suppression id is required"
+            );
+        }
+        const rows = await this.run<CampaignSuppressionRow>(
+            `DELETE ${this.table} WHERE id = $p0 RETURN BEFORE`,
+            [id],
+            "remove"
+        );
+        return rows.length > 0;
+    }
+
+    public async check(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<CampaignSuppressionEntry | null> {
+        requireTenant(tenantId);
+        const rows = await this.run<CampaignSuppressionRow>(
+            `SELECT * FROM ${this.table}
+             WHERE tenant_id = $p0 AND channel = $p1 AND channel_value = $p2
+             LIMIT 1`,
+            [tenantId, channel, channelValue],
+            "check"
+        );
+        return rows[0] !== undefined ? rowToEntry(rows[0]) : null;
+    }
+
+    public async list(
+        query: CampaignSuppressionQuery
+    ): Promise<readonly CampaignSuppressionEntry[]> {
+        const parsed = QuerySchema.safeParse(query);
+        if (!parsed.success) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "invalid suppression query",
+                { cause: parsed.error, context: { op: "list" } }
+            );
+        }
+        const conditions: string[] = ["tenant_id = $p0"];
+        const params: unknown[] = [parsed.data.tenantId];
+        const push = (col: string, value: unknown): void => {
+            params.push(value);
+            conditions.push(`${col} = $p${params.length - 1}`);
+        };
+        if (parsed.data.channel !== undefined) {
+            push("channel", parsed.data.channel);
+        }
+        if (parsed.data.reason !== undefined) {
+            push("reason", parsed.data.reason);
+        }
+        const limit = parsed.data.limit ?? 50;
+        const offset = parsed.data.offset ?? 0;
+        let sql = `SELECT * FROM ${this.table} WHERE ${conditions.join(" AND ")} LIMIT ${limit}`;
+        if (offset > 0) sql += ` START ${offset}`;
+        const rows = await this.run<CampaignSuppressionRow>(
+            sql,
+            params,
+            "list"
+        );
+        return rows.map(rowToEntry);
+    }
+
+    public async count(tenantId: string): Promise<number> {
+        requireTenant(tenantId);
+        const rows = await this.run<{ count: number }>(
+            `SELECT count() AS count FROM ${this.table}
+             WHERE tenant_id = $p0 GROUP ALL`,
+            [tenantId],
+            "count"
+        );
+        return rows[0]?.count ?? 0;
+    }
+
+    public async removeByChannelValue(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<boolean> {
+        requireTenant(tenantId);
+        const rows = await this.run<CampaignSuppressionRow>(
+            `DELETE ${this.table}
+             WHERE tenant_id = $p0 AND channel = $p1 AND channel_value = $p2
+             RETURN BEFORE`,
+            [tenantId, channel, channelValue],
+            "removeByChannelValue"
+        );
+        return rows.length > 0;
+    }
+
+    private async run<T>(
+        sql: string,
+        params: unknown[],
+        op: string
+    ): Promise<T[]> {
+        try {
+            return await this.db.query<T>(sql, params);
+        } catch (cause) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.DB_UNAVAILABLE,
+                `SurrealCampaignSuppressionRepository.${op} failed`,
+                { cause, context: { op } }
+            );
+        }
+    }
+}
+
+// Schemas/helpers are exported through the barrel for tests that want
+// to assert their behaviour directly.
+export { CreateInputSchema, QuerySchema };

packages/api-stack/api/api-plugin-campaigns/src/repositories/suppression/suppression.types.ts

@@ -0,0 +1,105 @@
+/**
+ * Type definitions for the campaign-suppression module. The local
+ * `CampaignSuppressionStore` interface is intentionally tenant + channel
+ * scoped — the genesis `@suaveplan/suppression` package is email-only and
+ * does not fit the campaigns plugin's multi-channel domain.
+ */
+
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import type { Clock, IdGenerator, LoggerLike } from "@suaveplan/types";
+
+/** Stable reasons a contact may be suppressed on a given channel. */
+export type CampaignSuppressionReason =
+    | "unsubscribe"
+    | "bounce"
+    | "complaint"
+    | "manual"
+    | "compliance";
+
+/**
+ * One suppression record. Channel-scoped: an address that is suppressed
+ * on `email` can still receive `sms`, so the `(tenantId, channel,
+ * channelValue)` triple is the natural primary key.
+ */
+export interface CampaignSuppressionEntry {
+    readonly id: string;
+    readonly tenantId: string;
+    readonly channel: string;
+    readonly channelValue: string;
+    readonly reason: CampaignSuppressionReason;
+    readonly source?: string;
+    readonly metadata?: Record<string, unknown>;
+    readonly createdAt: Date;
+}
+
+/** Filter parameters for listing suppression entries. */
+export interface CampaignSuppressionQuery {
+    readonly tenantId: string;
+    readonly channel?: string;
+    readonly reason?: CampaignSuppressionReason;
+    readonly limit?: number;
+    readonly offset?: number;
+}
+
+/** Input for creating a new suppression entry. `id` and `createdAt` are filled by the store. */
+export interface CreateCampaignSuppressionInput {
+    readonly tenantId: string;
+    readonly channel: string;
+    readonly channelValue: string;
+    readonly reason: CampaignSuppressionReason;
+    readonly source?: string;
+    readonly metadata?: Record<string, unknown>;
+}
+
+/**
+ * Persistence contract for tenant + channel-scoped suppression entries.
+ * Implementations may be in-memory (see
+ * {@link InMemoryCampaignSuppressionStore}) or SurrealDB-backed.
+ */
+export interface CampaignSuppressionStore {
+    add(
+        input: CreateCampaignSuppressionInput
+    ): Promise<CampaignSuppressionEntry>;
+    remove(id: string): Promise<boolean>;
+    check(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<CampaignSuppressionEntry | null>;
+    list(
+        query: CampaignSuppressionQuery
+    ): Promise<readonly CampaignSuppressionEntry[]>;
+    count(tenantId: string): Promise<number>;
+    removeByChannelValue(
+        tenantId: string,
+        channel: string,
+        channelValue: string
+    ): Promise<boolean>;
+}
+
+/** Constructor bundle for {@link SurrealCampaignSuppressionRepository}. */
+export interface SurrealCampaignSuppressionRepositoryOptions {
+    readonly db: SurrealAdapter;
+    readonly clock: Clock;
+    readonly idGenerator: IdGenerator;
+    readonly table?: string;
+    readonly logger?: LoggerLike;
+}
+
+/** Constructor bundle for {@link InMemoryCampaignSuppressionStore}. */
+export interface InMemoryCampaignSuppressionStoreOptions {
+    readonly clock: Clock;
+    readonly idGenerator: IdGenerator;
+}
+
+/** SurrealDB row shape for the `campaign_suppression` table. */
+export interface CampaignSuppressionRow {
+    id: string;
+    tenant_id: string;
+    channel: string;
+    channel_value: string;
+    reason: string;
+    source?: string | null;
+    metadata?: Record<string, unknown> | null;
+    created_at: Date | string;
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/action-routes.md

@@ -0,0 +1,96 @@
+# Campaign action routes
+
+## Purpose
+
+This module owns the campaign action routes — state-machine
+transitions (`/send`, `/pause`, `/cancel`), the `/duplicate`
+shallow-copy endpoint, the `/test` ad-hoc send, and the two
+delivery-tracking-backed read endpoints (`/stats` and `/events`).
+State transitions are authoritative: invalid transitions raise
+`CAMPAIGNS_API.INVALID_STATE_TRANSITION` mapped to HTTP 409 so clients
+can drive UI affordances (enable/disable a "Pause" button) off a
+stable code rather than parsing error messages.
+
+The action routes consume the in-domain `CampaignStateMachine` from
+`@suaveplan/campaigns`. Every transition decision flows through that
+single source of truth — no string-comparisons of `status` are
+duplicated at the route layer, eliminating drift between the engine
+and the HTTP surface.
+
+## Features
+
+- 3 transition routes: `buildSendCampaignRoute`,
+  `buildPauseCampaignRoute`, `buildCancelCampaignRoute`.
+- 1 clone route: `buildDuplicateCampaignRoute` — copies metadata and
+  audience/template config, resets stats, clears `sentAt`/`completedAt`.
+- 1 test-send route: `buildTestSendRoute` — validates a recipient list
+  of 1–10 email addresses and echoes them back.
+- 2 reporting routes consuming `DeliveryEventStore`:
+  `buildCampaignStatsRoute`, `buildCampaignEventsRoute`.
+- Transition guard raises `INVALID_STATE_TRANSITION` (HTTP 409) when
+  `CampaignStateMachine.transition` rejects the (status, event) pair.
+
+## Usage: Basic
+
+```ts
+import { buildSendCampaignRoute } from "@suaveplan/api-plugin-campaigns";
+
+const entry = buildSendCampaignRoute();
+app.post(entry.route.path, (c) => entry.handler(c));
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildCampaignEventsRoute,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildDuplicateCampaignRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildTestSendRoute,
+} from "@suaveplan/api-plugin-campaigns";
+
+const actionEntries = [
+    buildSendCampaignRoute(),
+    buildPauseCampaignRoute(),
+    buildCancelCampaignRoute(),
+    buildDuplicateCampaignRoute(),
+    buildTestSendRoute(),
+    buildCampaignStatsRoute(),
+    buildCampaignEventsRoute(),
+];
+```
+
+## API Reference
+
+- `buildSendCampaignRoute(): PluginRouteEntry`
+- `buildPauseCampaignRoute(): PluginRouteEntry`
+- `buildCancelCampaignRoute(): PluginRouteEntry`
+- `buildDuplicateCampaignRoute(): PluginRouteEntry`
+- `buildTestSendRoute(): PluginRouteEntry`
+- `buildCampaignStatsRoute(): PluginRouteEntry`
+- `buildCampaignEventsRoute(): PluginRouteEntry`
+- `TestSendSchema`, `EventQuerySchema`, `DeliveryStatsResponseSchema`
+  — Zod schemas re-exported for documentation generators and tests.
+
+## Implementation Notes
+
+`applyTransition` wraps `CampaignStateMachine.transition` in a
+`CampaignsApiError` so a failed transition surfaces as
+`CAMPAIGNS_API.INVALID_STATE_TRANSITION` rather than the
+domain-package's `CampaignsError` (which carries an unrelated
+namespace). Wrapping at this seam keeps the route layer's error
+vocabulary self-contained: every error a client sees from the
+campaigns plugin carries a `CAMPAIGNS_API.*` code.
+
+The `/duplicate` handler intentionally copies all configuration
+fields (template, audience, throttle, abTestConfig) but resets the
+volatile fields (`id`, `status`, `stats`, `sentAt`, `completedAt`,
+`createdAt`, `updatedAt`). The `(copy)` suffix is appended to the
+name so the duplicate is visually distinct in listing UIs without
+forcing the operator to provide a new name up front. The route
+handlers' OTel attributes record `route` plus `outcome` so an
+operator can chart per-route success/error counters without parsing
+log messages.

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/action-routes.test.ts

@@ -0,0 +1,357 @@
+import { type Campaign, InMemoryCampaignStore } from "@suaveplan/campaigns";
+import {
+    type DeliveryEvent,
+    InMemoryDeliveryEventStore,
+} from "@suaveplan/delivery-tracking";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { Hono } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import {
+    buildCampaignEventsRoute,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildDuplicateCampaignRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildTestSendRoute,
+} from "./action-routes.js";
+import "../../context/context.js";
+
+function makeApp(
+    repo: InMemoryCampaignStore,
+    eventStore: InMemoryDeliveryEventStore = new InMemoryDeliveryEventStore(),
+    principal: object | null = { id: "u", tenantId: "t" }
+): Hono {
+    const app = new Hono();
+    app.use("*", async (c, next) => {
+        if (principal !== null) c.set("user", principal as never);
+        c.set("campaignRepository", repo);
+        c.set("deliveryEventStore", eventStore);
+        c.set("eventBus", { emit: () => undefined } as never);
+        await next();
+    });
+    app.onError((err, c) => {
+        if (err instanceof CampaignsApiError) {
+            const status = ((err.context as { statusCode?: number } | undefined)
+                ?.statusCode ?? 500) as 400 | 401 | 404 | 409 | 500;
+            return c.json({ code: err.code, error: err.message }, status);
+        }
+        return c.json({ error: String(err) }, 500);
+    });
+    for (const e of [
+        buildSendCampaignRoute(),
+        buildPauseCampaignRoute(),
+        buildCancelCampaignRoute(),
+        buildDuplicateCampaignRoute(),
+        buildTestSendRoute(),
+        buildCampaignStatsRoute(),
+        buildCampaignEventsRoute(),
+    ]) {
+        const method = e.route.method as "get" | "post";
+        app[method](e.route.path, (c) => e.handler(c as never));
+    }
+    return app;
+}
+
+async function seed(
+    repo: InMemoryCampaignStore,
+    overrides: Partial<Campaign> = {}
+): Promise<string> {
+    const now = new Date();
+    const id = (overrides.id ?? "c1") as string;
+    await repo.create({
+        id,
+        tenantId: "t",
+        name: "Promo",
+        status: "draft",
+        type: "broadcast",
+        channel: "email",
+        audienceConfig: { groupIds: [] },
+        metadata: {},
+        stats: {
+            totalRecipients: 0,
+            sent: 0,
+            delivered: 0,
+            opened: 0,
+            clicked: 0,
+            bounced: 0,
+            unsubscribed: 0,
+            complained: 0,
+            failed: 0,
+        },
+        createdAt: now,
+        updatedAt: now,
+        ...overrides,
+    } as Campaign);
+    return id;
+}
+
+describe("campaign action routes", () => {
+    it("POST /campaigns/:id/send transitions draft → sending", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/send", { method: "POST" });
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.status).toBe("sending");
+    });
+
+    it("send raises INVALID_STATE_TRANSITION on completed campaign", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, { status: "completed" });
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/send", { method: "POST" });
+        expect(res.status).toBe(409);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_STATE_TRANSITION
+        );
+    });
+
+    it("send 404 when campaign missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope/send", {
+            method: "POST",
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("POST /campaigns/:id/pause works from sending", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, { status: "sending" });
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/pause", {
+            method: "POST",
+        });
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.status).toBe("paused");
+    });
+
+    it("pause 409 when not sending", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/pause", {
+            method: "POST",
+        });
+        expect(res.status).toBe(409);
+    });
+
+    it("POST /campaigns/:id/cancel works from scheduled", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, { status: "scheduled" });
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/cancel", {
+            method: "POST",
+        });
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.status).toBe("cancelled");
+    });
+
+    it("POST /campaigns/:id/duplicate creates a draft clone", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, { status: "completed" });
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/duplicate", {
+            method: "POST",
+        });
+        expect(res.status).toBe(201);
+        const body = await res.json();
+        expect(body.data.name).toBe("Promo (copy)");
+        expect(body.data.status).toBe("draft");
+        expect(body.data.id).not.toBe("c1");
+    });
+
+    it("duplicate 404 when source missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope/duplicate", {
+            method: "POST",
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("POST /campaigns/:id/test echoes valid recipients", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/test", {
+            method: "POST",
+            body: JSON.stringify({ recipients: ["a@b.com"] }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.recipients).toEqual(["a@b.com"]);
+    });
+
+    it("test rejects invalid body", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/test", {
+            method: "POST",
+            body: JSON.stringify({ recipients: [] }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("test 404 when campaign missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope/test", {
+            method: "POST",
+            body: JSON.stringify({ recipients: ["a@b.com"] }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("GET /campaigns/:id/stats returns delivery stats", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const eventStore = new InMemoryDeliveryEventStore();
+        const app = makeApp(repo, eventStore);
+        const res = await app.request("/campaigns/c1/stats");
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(typeof body.data.deliveryRate).toBe("number");
+    });
+
+    it("stats 404 when campaign missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope/stats");
+        expect(res.status).toBe(404);
+    });
+
+    it("GET /campaigns/:id/events lists events", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const eventStore = new InMemoryDeliveryEventStore();
+        const event: DeliveryEvent = {
+            id: "e1",
+            tenantId: "t",
+            campaignId: "c1",
+            contactId: "u1",
+            channel: "email",
+            eventType: "delivered",
+            messageId: "m1",
+            metadata: {},
+            timestamp: new Date(),
+        };
+        await eventStore.record(event);
+        const app = makeApp(repo, eventStore);
+        const res = await app.request(
+            "/campaigns/c1/events?eventType=delivered&limit=10&offset=0"
+        );
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.total).toBe(1);
+        expect(typeof body.data.events[0].timestamp).toBe("string");
+    });
+
+    it("events 404 when campaign missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const eventStore = new InMemoryDeliveryEventStore();
+        const app = makeApp(repo, eventStore);
+        const res = await app.request("/campaigns/nope/events");
+        expect(res.status).toBe(404);
+    });
+
+    it("events default query when no params", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const eventStore = new InMemoryDeliveryEventStore();
+        const app = makeApp(repo, eventStore);
+        const res = await app.request("/campaigns/c1/events");
+        expect(res.status).toBe(200);
+    });
+
+    it("send surfaces SERVICE_NOT_AVAILABLE when repo missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildSendCampaignRoute();
+        app.post(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns/c1/send", {
+            method: "POST",
+        });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("stats surfaces SERVICE_NOT_AVAILABLE when event store missing", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            c.set("campaignRepository", repo);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildCampaignStatsRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns/c1/stats");
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("POST /campaigns/:id/test 400 on malformed JSON body", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1/test", {
+            method: "POST",
+            body: "not-json{",
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("send rejects unauthenticated requests", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo, undefined, null);
+        const res = await app.request("/campaigns/c1/send", {
+            method: "POST",
+        });
+        expect(res.status).toBe(401);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/action-routes.ts

@@ -0,0 +1,361 @@
+/**
+ * Campaign action route builders — state-machine transitions and the
+ * `/duplicate` and `/test` action endpoints. The state guard is
+ * authoritative: invalid transitions raise
+ * `CAMPAIGNS_API.INVALID_STATE_TRANSITION` mapped to HTTP 409 so
+ * clients can branch on a stable code rather than parsing error
+ * messages.
+ */
+
+import {
+    GET,
+    type PluginRouteEntry,
+    POST,
+    successResponse,
+} from "@suaveplan/api-openapi";
+import {
+    type Campaign,
+    CampaignStateMachine,
+    type CampaignStatus,
+    type CampaignStore,
+} from "@suaveplan/campaigns";
+import type { DeliveryEventStore } from "@suaveplan/delivery-tracking";
+import type { Context } from "hono";
+import z from "zod";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { getCampaignsApiInstruments } from "../../otel/instruments.js";
+import { requireTenant } from "../shared/require-tenant.js";
+import { campaignToResponse } from "./crud-routes.js";
+import {
+    CampaignIdParamSchema,
+    CampaignResponseSchema,
+    EMPTY_STATS,
+} from "./schemas.js";
+
+const TestSendSchema = z.object({
+    recipients: z.array(z.email()).min(1).max(10),
+});
+
+const DeliveryStatsResponseSchema = z.object({
+    sent: z.number(),
+    delivered: z.number(),
+    deliveryRate: z.number(),
+    opened: z.number(),
+    openRate: z.number(),
+    clicked: z.number(),
+    clickRate: z.number(),
+    bounced: z.number(),
+    bounceRate: z.number(),
+    unsubscribed: z.number(),
+    unsubscribeRate: z.number(),
+    complained: z.number(),
+    complainRate: z.number(),
+});
+
+const DeliveryEventResponseSchema = z.object({
+    id: z.string(),
+    tenantId: z.string(),
+    campaignId: z.string().nullable().optional(),
+    contactId: z.string(),
+    channel: z.string(),
+    eventType: z.string(),
+    messageId: z.string(),
+    metadata: z.record(z.string(), z.unknown()),
+    timestamp: z.string(),
+});
+
+const DeliveryEventListResponseSchema = z.object({
+    events: z.array(DeliveryEventResponseSchema),
+    total: z.number(),
+});
+
+const EventQuerySchema = z.object({
+    eventType: z
+        .enum([
+            "sent",
+            "delivered",
+            "opened",
+            "clicked",
+            "bounced",
+            "unsubscribed",
+            "complained",
+            "deferred",
+            "dropped",
+            "read",
+        ])
+        .optional(),
+    limit: z.coerce.number().int().min(1).max(200).default(50),
+    offset: z.coerce.number().int().min(0).default(0),
+});
+
+function requireRepo(c: Context): CampaignStore {
+    const repo = c.get("campaignRepository");
+    if (repo === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaignRepository slot is empty"
+        );
+    }
+    return repo;
+}
+
+function requireEventStore(c: Context): DeliveryEventStore {
+    const store = c.get("deliveryEventStore");
+    if (store === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "deliveryEventStore slot is empty"
+        );
+    }
+    return store;
+}
+
+async function loadOwned(
+    c: Context,
+    id: string,
+    tenantId: string
+): Promise<Campaign> {
+    const campaign = await requireRepo(c).getById(id);
+    if (campaign === null || campaign.tenantId !== tenantId) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+            `campaign ${id} not found`,
+            { context: { statusCode: 404, id } }
+        );
+    }
+    return campaign;
+}
+
+const stateMachine = new CampaignStateMachine();
+
+function applyTransition(
+    current: CampaignStatus,
+    event: "send" | "pause" | "cancel"
+): CampaignStatus {
+    try {
+        return stateMachine.transition(current, event);
+    } catch (cause) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.INVALID_STATE_TRANSITION,
+            `cannot apply '${event}' to campaign in status '${current}'`,
+            { cause, context: { statusCode: 409, from: current, event } }
+        );
+    }
+}
+
+function buildActionRoute(
+    path: string,
+    summary: string,
+    event: "send" | "pause" | "cancel",
+    routeLabel: string
+): PluginRouteEntry {
+    const route = POST(path)
+        .tags("campaigns")
+        .summary(summary)
+        .params(CampaignIdParamSchema)
+        .response(successResponse(CampaignResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const id = c.req.param("id");
+        const existing = await loadOwned(c, id, tenantId);
+        const next = applyTransition(existing.status, event);
+        const updated = await repo.updateStatus(id, next);
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: routeLabel,
+            outcome: "success",
+        });
+        return c.json(
+            { success: true as const, data: campaignToResponse(updated) },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `POST /campaigns/:id/send` — transition draft|scheduled → sending. */
+export function buildSendCampaignRoute(): PluginRouteEntry {
+    return buildActionRoute(
+        "/campaigns/:id/send",
+        "Send a campaign",
+        "send",
+        "send"
+    );
+}
+
+/** `POST /campaigns/:id/pause` — transition sending → paused. */
+export function buildPauseCampaignRoute(): PluginRouteEntry {
+    return buildActionRoute(
+        "/campaigns/:id/pause",
+        "Pause a campaign",
+        "pause",
+        "pause"
+    );
+}
+
+/** `POST /campaigns/:id/cancel` — transition to cancelled. */
+export function buildCancelCampaignRoute(): PluginRouteEntry {
+    return buildActionRoute(
+        "/campaigns/:id/cancel",
+        "Cancel a campaign",
+        "cancel",
+        "cancel"
+    );
+}
+
+/** `POST /campaigns/:id/duplicate` — clone the campaign into draft. */
+export function buildDuplicateCampaignRoute(): PluginRouteEntry {
+    const route = POST("/campaigns/:id/duplicate")
+        .tags("campaigns")
+        .summary("Duplicate a campaign")
+        .params(CampaignIdParamSchema)
+        .response(successResponse(CampaignResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const id = c.req.param("id");
+        const source = await loadOwned(c, id, tenantId);
+        const now = new Date();
+        const clone = await repo.create({
+            ...source,
+            id: crypto.randomUUID(),
+            name: `${source.name} (copy)`,
+            status: "draft",
+            stats: { ...EMPTY_STATS },
+            createdAt: now,
+            updatedAt: now,
+            sentAt: undefined,
+            completedAt: undefined,
+        } as unknown as Campaign);
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "duplicate",
+            outcome: "success",
+        });
+        return c.json(
+            { success: true as const, data: campaignToResponse(clone) },
+            201
+        );
+    }
+    return { route, handler };
+}
+
+/** `POST /campaigns/:id/test` — fire a test send to the given recipients. */
+export function buildTestSendRoute(): PluginRouteEntry {
+    const route = POST("/campaigns/:id/test")
+        .tags("campaigns")
+        .summary("Send a test of a campaign")
+        .params(CampaignIdParamSchema)
+        .body(TestSendSchema)
+        .response(
+            z.object({
+                success: z.literal(true),
+                data: z.object({
+                    recipients: z.array(z.email()),
+                }),
+            })
+        )
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const id = c.req.param("id");
+        await loadOwned(c, id, tenantId);
+        const raw = (await c.req.json().catch(() => ({}))) as unknown;
+        const parsed = TestSendSchema.safeParse(raw);
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "test",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "POST /campaigns/:id/test body failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "test",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: { recipients: parsed.data.recipients },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `GET /campaigns/:id/stats` — aggregated delivery stats. */
+export function buildCampaignStatsRoute(): PluginRouteEntry {
+    const route = GET("/campaigns/:id/stats")
+        .tags("campaigns")
+        .summary("Get delivery stats for a campaign")
+        .params(CampaignIdParamSchema)
+        .response(successResponse(DeliveryStatsResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const id = c.req.param("id");
+        await loadOwned(c, id, tenantId);
+        const stats = await requireEventStore(c).getStatsByCampaign(id);
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "stats",
+            outcome: "success",
+        });
+        return c.json({ success: true as const, data: stats }, 200);
+    }
+    return { route, handler };
+}
+
+/** `GET /campaigns/:id/events` — paginated event log. */
+export function buildCampaignEventsRoute(): PluginRouteEntry {
+    const route = GET("/campaigns/:id/events")
+        .tags("campaigns")
+        .summary("List delivery events for a campaign")
+        .params(CampaignIdParamSchema)
+        .query(EventQuerySchema)
+        .response(successResponse(DeliveryEventListResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const id = c.req.param("id");
+        await loadOwned(c, id, tenantId);
+        const query = EventQuerySchema.parse({
+            eventType: c.req.query("eventType"),
+            limit: c.req.query("limit") ?? 50,
+            offset: c.req.query("offset") ?? 0,
+        });
+        const events = await requireEventStore(c).getByCampaign(id, {
+            ...(query.eventType !== undefined
+                ? { eventType: query.eventType }
+                : {}),
+            limit: query.limit,
+            offset: query.offset,
+        });
+        const mapped = events.map((e) => ({
+            ...e,
+            timestamp: e.timestamp.toISOString(),
+        }));
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "events",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: { events: mapped, total: mapped.length },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+export { DeliveryStatsResponseSchema, EventQuerySchema, TestSendSchema };

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/build-routes.md

@@ -0,0 +1,71 @@
+# `build-routes` (campaigns)
+
+## Purpose
+
+`buildCampaignRoutes` is the single aggregator that materialises every
+`/campaigns/*` `PluginRouteEntry` in a canonical order. The plugin's
+`onInit` consumes the array verbatim — there is no per-route opt-in or
+configuration knob — so the OpenAPI spec generated for the campaigns
+tree is deterministic across deployments and across reloads. Tests
+assert the canonical order so accidental reordering during refactors
+surfaces immediately rather than as silent spec drift.
+
+The aggregator is intentionally a flat function returning a readonly
+array (rather than a class or builder). The cost of describing 12
+routes inline is small, the structure is obvious, and downstream
+consumers can `array.map(toPrefixed)` cheaply when they need to mount
+under a non-root prefix.
+
+## Features
+
+- Returns 12 entries in a documented canonical order.
+- Pure: no I/O, no side effects, no captured registry.
+- Each entry exposes `route: RouteConfig` + `handler: RouteHandler` so
+  it can be mounted either via `definePluginRoutes` (production) or
+  directly on a bare `Hono` app (tests).
+
+## Usage: Basic
+
+```ts
+import { buildCampaignRoutes } from "@suaveplan/api-plugin-campaigns";
+
+const entries = buildCampaignRoutes();
+for (const e of entries) {
+    app[e.route.method as "get" | "post" | "patch" | "delete"](
+        e.route.path,
+        (c) => e.handler(c)
+    );
+}
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildCampaignRoutes,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+const prefix = "/api/v1";
+const prefixed = buildCampaignRoutes().map((e) => ({
+    ...e,
+    route: { ...e.route, path: `${prefix}${e.route.path}` },
+}));
+definePluginRoutes(prefixed, { app, registry, pluginName: "campaigns" });
+```
+
+## API Reference
+
+- `buildCampaignRoutes(): readonly PluginRouteEntry[]` — returns the
+  12 canonical campaign route entries.
+
+## Implementation Notes
+
+The canonical order — list, create, get, update, delete, send, pause,
+cancel, duplicate, test, stats, events — places the read endpoints
+before write/action endpoints (so OpenAPI consumers naturally see the
+read surface first) and groups the lifecycle action routes together.
+The `events` route comes last because it depends on the
+`deliveryEventStore` slot being populated, which is the only
+non-trivial dependency in the bundle; co-locating it with `stats`
+makes the dependency footprint visible at a glance.

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/build-routes.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { buildCampaignRoutes } from "./build-routes.js";
+
+describe("buildCampaignRoutes", () => {
+    it("returns 12 entries in canonical order", { timeout: 5000 }, () => {
+        const entries = buildCampaignRoutes();
+        expect(entries.map((e) => `${e.route.method} ${e.route.path}`)).toEqual(
+            [
+                "get /campaigns",
+                "post /campaigns",
+                "get /campaigns/:id",
+                "patch /campaigns/:id",
+                "delete /campaigns/:id",
+                "post /campaigns/:id/send",
+                "post /campaigns/:id/pause",
+                "post /campaigns/:id/cancel",
+                "post /campaigns/:id/duplicate",
+                "post /campaigns/:id/test",
+                "get /campaigns/:id/stats",
+                "get /campaigns/:id/events",
+            ]
+        );
+    });
+
+    it("every entry has a callable handler + a typed route config", {
+        timeout: 5000,
+    }, () => {
+        for (const e of buildCampaignRoutes()) {
+            expect(typeof e.handler).toBe("function");
+            expect(typeof e.route.method).toBe("string");
+            expect(typeof e.route.path).toBe("string");
+            expect(e.route.tags).toEqual(["campaigns"]);
+        }
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/build-routes.ts

@@ -0,0 +1,46 @@
+/**
+ * Aggregator that returns every `/campaigns/*` `PluginRouteEntry`
+ * value to be mounted by the plugin via `definePluginRoutes`. Keeping
+ * the canonical order in one place — listed, mutated, then acted on —
+ * makes the OpenAPI spec deterministic across deploys.
+ */
+
+import type { PluginRouteEntry } from "@suaveplan/api-openapi";
+import {
+    buildCampaignEventsRoute,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildDuplicateCampaignRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildTestSendRoute,
+} from "./action-routes.js";
+import {
+    buildCreateCampaignRoute,
+    buildDeleteCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildUpdateCampaignRoute,
+} from "./crud-routes.js";
+
+/**
+ * Returns the 12 `/campaigns/*` plugin-route entries in canonical order:
+ * list, create, get, update, delete, send, pause, cancel, duplicate,
+ * test, stats, events.
+ */
+export function buildCampaignRoutes(): readonly PluginRouteEntry[] {
+    return [
+        buildListCampaignsRoute(),
+        buildCreateCampaignRoute(),
+        buildGetCampaignRoute(),
+        buildUpdateCampaignRoute(),
+        buildDeleteCampaignRoute(),
+        buildSendCampaignRoute(),
+        buildPauseCampaignRoute(),
+        buildCancelCampaignRoute(),
+        buildDuplicateCampaignRoute(),
+        buildTestSendRoute(),
+        buildCampaignStatsRoute(),
+        buildCampaignEventsRoute(),
+    ];
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/crud-routes.md

@@ -0,0 +1,94 @@
+# Campaign CRUD routes
+
+## Purpose
+
+This module owns the five canonical CRUD entries for the `/campaigns`
+route tree: list, create, get, update, and delete. Each builder returns
+a `PluginRouteEntry` (`{ route, handler }`) so the parent plugin can
+mount them through `definePluginRoutes` against the host's
+`OpenAPIRegistry`. Keeping the builders pure (no side effects, no
+captured registry) means the same entries can be reused in unit tests
+against a bare `Hono` app and in production against an
+`OpenAPIHono` + registry pair.
+
+Every handler enforces three invariants before touching the
+repository: the request principal must carry a non-empty `tenantId`
+(`requireTenant`), the `campaignRepository` slot in the Hono context
+must be populated (else `SERVICE_NOT_AVAILABLE`), and any campaign
+loaded by id must belong to the caller's tenant (else
+`CAMPAIGN_NOT_FOUND` — deliberately the same code we use for missing
+rows so cross-tenant probes leak no information).
+
+## Features
+
+- `buildListCampaignsRoute` — `GET /campaigns`, paginated, filterable.
+- `buildCreateCampaignRoute` — `POST /campaigns`, validates body,
+  stamps `id`, `status: "draft"`, `stats: EMPTY_STATS`, `createdAt`,
+  `updatedAt`.
+- `buildGetCampaignRoute` — `GET /campaigns/:id`, 404 on missing or
+  wrong-tenant.
+- `buildUpdateCampaignRoute` — `PATCH /campaigns/:id`, partial body,
+  validates ownership before update.
+- `buildDeleteCampaignRoute` — `DELETE /campaigns/:id`, 204 on
+  success, 404 on missing/wrong-tenant.
+- `campaignToResponse(campaign)` — re-exported helper that maps
+  `Date` fields to ISO 8601 strings and `undefined` to `null` for
+  JSON serialisation.
+
+## Usage: Basic
+
+```ts
+import { buildCreateCampaignRoute } from "@suaveplan/api-plugin-campaigns";
+import { Hono } from "hono";
+
+const entry = buildCreateCampaignRoute();
+const app = new Hono();
+app.post(entry.route.path, (c) => entry.handler(c));
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildCreateCampaignRoute,
+    buildDeleteCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildUpdateCampaignRoute,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+definePluginRoutes(
+    [
+        buildListCampaignsRoute(),
+        buildCreateCampaignRoute(),
+        buildGetCampaignRoute(),
+        buildUpdateCampaignRoute(),
+        buildDeleteCampaignRoute(),
+    ],
+    { app, registry, pluginName: "campaigns" }
+);
+```
+
+## API Reference
+
+- `buildListCampaignsRoute(): PluginRouteEntry`
+- `buildCreateCampaignRoute(): PluginRouteEntry`
+- `buildGetCampaignRoute(): PluginRouteEntry`
+- `buildUpdateCampaignRoute(): PluginRouteEntry`
+- `buildDeleteCampaignRoute(): PluginRouteEntry`
+- `campaignToResponse(c: Campaign): Record<string, unknown>` —
+  JSON-safe projection (ISO 8601 dates, `null` instead of `undefined`).
+
+## Implementation Notes
+
+The handlers eagerly call `c.req.query("...")` rather than relying on
+the OpenAPI `c.req.valid("query")` because the same handler is reused
+in unit tests against a bare `Hono` app (no `app.openapi` plumbing).
+The bare-Hono path is the load-bearing one for the integration suite,
+so `c.req.query` keeps the seam visible. Errors are thrown
+synchronously and surfaced through the host-level `onError` adapter —
+no try/catch noise inside the happy path. `crypto.randomUUID()` is the
+id source for `POST /campaigns`; the runtime polyfill bundle imported
+in `tests/setup/polyfills.ts` ensures the WSL2 + Bun test environment
+exposes it.

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/crud-routes.test.ts

@@ -0,0 +1,457 @@
+import { InMemoryCampaignStore } from "@suaveplan/campaigns";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { Hono } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import {
+    buildCreateCampaignRoute,
+    buildDeleteCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildUpdateCampaignRoute,
+    campaignToResponse,
+} from "./crud-routes.js";
+import "../../context/context.js";
+
+function makeApp(
+    repo: InMemoryCampaignStore,
+    principal: object | null = { id: "u", tenantId: "t" }
+): Hono {
+    const app = new Hono();
+    app.use("*", async (c, next) => {
+        if (principal !== null) c.set("user", principal as never);
+        c.set("campaignRepository", repo);
+        c.set("eventBus", { emit: () => undefined } as never);
+        await next();
+    });
+    app.onError((err, c) => {
+        if (err instanceof CampaignsApiError) {
+            const status = ((err.context as { statusCode?: number } | undefined)
+                ?.statusCode ?? 500) as 400 | 401 | 404 | 500;
+            return c.json(
+                { success: false, code: err.code, error: err.message },
+                status
+            );
+        }
+        return c.json({ success: false, error: String(err) }, 500);
+    });
+    for (const e of [
+        buildListCampaignsRoute(),
+        buildCreateCampaignRoute(),
+        buildGetCampaignRoute(),
+        buildUpdateCampaignRoute(),
+        buildDeleteCampaignRoute(),
+    ]) {
+        const method = e.route.method as "get" | "post" | "patch" | "delete";
+        app[method](e.route.path, (c) => e.handler(c as never));
+    }
+    return app;
+}
+
+async function seed(
+    repo: InMemoryCampaignStore,
+    tenant = "t"
+): Promise<string> {
+    const now = new Date();
+    const id = "c1";
+    await repo.create({
+        id,
+        tenantId: tenant,
+        name: "Promo",
+        status: "draft",
+        type: "broadcast",
+        channel: "email",
+        audienceConfig: { groupIds: [] },
+        metadata: {},
+        stats: {
+            totalRecipients: 0,
+            sent: 0,
+            delivered: 0,
+            opened: 0,
+            clicked: 0,
+            bounced: 0,
+            unsubscribed: 0,
+            complained: 0,
+            failed: 0,
+        },
+        createdAt: now,
+        updatedAt: now,
+    });
+    return id;
+}
+
+describe("campaign CRUD routes", () => {
+    it("POST /campaigns 401 without tenantId", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo, null);
+        const res = await app.request("/campaigns", {
+            method: "POST",
+            body: JSON.stringify({ name: "x" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(401);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("POST /campaigns creates a campaign", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns", {
+            method: "POST",
+            body: JSON.stringify({ name: "Promo" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(201);
+        const body = await res.json();
+        expect(body.data.name).toBe("Promo");
+        expect(body.data.status).toBe("draft");
+    });
+
+    it("POST /campaigns rejects invalid body", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns", {
+            method: "POST",
+            body: JSON.stringify({ name: "" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+        expect((await res.json()).code).toBe(CAMPAIGNS_API_CODES.INVALID_INPUT);
+    });
+
+    it("GET /campaigns lists tenant campaigns", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns");
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.total).toBe(1);
+        expect(body.data.campaigns).toHaveLength(1);
+    });
+
+    it("GET /campaigns honours query filters", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request(
+            "/campaigns?status=draft&type=broadcast&channel=email&limit=5&offset=0"
+        );
+        expect(res.status).toBe(200);
+    });
+
+    it("GET /campaigns/:id returns 404 for missing", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope");
+        expect(res.status).toBe(404);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND
+        );
+    });
+
+    it("GET /campaigns/:id returns 404 for wrong tenant", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, "other");
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1");
+        expect(res.status).toBe(404);
+    });
+
+    it("GET /campaigns/:id returns 200 on hit", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1");
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.id).toBe("c1");
+    });
+
+    it("PATCH /campaigns/:id updates the name", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", {
+            method: "PATCH",
+            body: JSON.stringify({ name: "Updated" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(200);
+        expect((await res.json()).data.name).toBe("Updated");
+    });
+
+    it("PATCH /campaigns/:id rejects invalid body", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", {
+            method: "PATCH",
+            body: JSON.stringify({ name: "" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("PATCH /campaigns/:id 404 when missing", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope", {
+            method: "PATCH",
+            body: JSON.stringify({ name: "x" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("PATCH /campaigns/:id 404 wrong tenant", { timeout: 5000 }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, "other");
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", {
+            method: "PATCH",
+            body: JSON.stringify({ name: "x" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("DELETE /campaigns/:id returns 204 on hit", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", { method: "DELETE" });
+        expect(res.status).toBe(204);
+    });
+
+    it("DELETE /campaigns/:id returns 404 missing", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/nope", { method: "DELETE" });
+        expect(res.status).toBe(404);
+    });
+
+    it("DELETE /campaigns/:id 404 wrong tenant", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo, "other");
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", { method: "DELETE" });
+        expect(res.status).toBe(404);
+    });
+
+    it("returns 500 when campaignRepository slot is empty", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) => {
+            const code = (err as CampaignsApiError).code;
+            return c.json({ code }, 500);
+        });
+        const e = buildListCampaignsRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns");
+        expect(res.status).toBe(500);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("create surfaces SERVICE_NOT_AVAILABLE when repo missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildCreateCampaignRoute();
+        app.post(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns", {
+            method: "POST",
+            body: JSON.stringify({ name: "x" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(500);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("get surfaces SERVICE_NOT_AVAILABLE when repo missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildGetCampaignRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns/x");
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("update surfaces SERVICE_NOT_AVAILABLE when repo missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildUpdateCampaignRoute();
+        app.patch(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns/x", {
+            method: "PATCH",
+            body: JSON.stringify({ name: "y" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("delete surfaces SERVICE_NOT_AVAILABLE when repo missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildDeleteCampaignRoute();
+        app.delete(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/campaigns/x", { method: "DELETE" });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("POST /campaigns returns 400 on malformed JSON body", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns", {
+            method: "POST",
+            body: "not-json{",
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("PATCH /campaigns/:id accepts malformed JSON as empty body (UpdateSchema is all-optional)", {
+        timeout: 5000,
+    }, async () => {
+        const repo = new InMemoryCampaignStore();
+        await seed(repo);
+        const app = makeApp(repo);
+        const res = await app.request("/campaigns/c1", {
+            method: "PATCH",
+            body: "not-json{",
+            headers: { "content-type": "application/json" },
+        });
+        // Empty body falls through the all-optional schema; no fields
+        // change. This still exercises the JSON catch path.
+        expect(res.status).toBe(200);
+    });
+
+    it("campaignToResponse formats undefined dates as null", {
+        timeout: 5000,
+    }, () => {
+        const now = new Date();
+        const projected = campaignToResponse({
+            id: "c1",
+            tenantId: "t",
+            name: "x",
+            status: "draft",
+            type: "broadcast",
+            channel: "email",
+            audienceConfig: { groupIds: [] },
+            metadata: {},
+            stats: {
+                totalRecipients: 0,
+                sent: 0,
+                delivered: 0,
+                opened: 0,
+                clicked: 0,
+                bounced: 0,
+                unsubscribed: 0,
+                complained: 0,
+                failed: 0,
+            },
+            createdAt: now,
+            updatedAt: now,
+        });
+        expect(projected.sentAt).toBeNull();
+        expect(projected.completedAt).toBeNull();
+        expect(typeof projected.createdAt).toBe("string");
+    });
+
+    it("campaignToResponse accepts date-string inputs", {
+        timeout: 5000,
+    }, () => {
+        const projected = campaignToResponse({
+            id: "c1",
+            tenantId: "t",
+            name: "x",
+            status: "draft",
+            type: "broadcast",
+            channel: "email",
+            audienceConfig: { groupIds: [] },
+            metadata: {},
+            stats: {
+                totalRecipients: 0,
+                sent: 0,
+                delivered: 0,
+                opened: 0,
+                clicked: 0,
+                bounced: 0,
+                unsubscribed: 0,
+                complained: 0,
+                failed: 0,
+            },
+            // Intentionally a string to exercise the non-Date branch
+            createdAt: "2026-01-01T00:00:00.000Z" as unknown as Date,
+            updatedAt: new Date("2026-01-02T00:00:00.000Z"),
+            sentAt: new Date("2026-01-03T00:00:00.000Z"),
+            completedAt: new Date("2026-01-04T00:00:00.000Z"),
+        });
+        expect(projected.createdAt).toBe("2026-01-01T00:00:00.000Z");
+        expect(projected.sentAt).toBe("2026-01-03T00:00:00.000Z");
+        expect(projected.completedAt).toBe("2026-01-04T00:00:00.000Z");
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/crud-routes.ts

@@ -0,0 +1,267 @@
+/**
+ * Campaign CRUD route builders — list, create, get, update, delete.
+ * Each builder returns a `PluginRouteEntry` for mounting via
+ * `definePluginRoutes`. Handlers read the repository from
+ * `c.get("campaignRepository")` (typed via the Hono ContextVariableMap
+ * augmentation) and the principal via `requireTenant`.
+ */
+
+import {
+    DELETE,
+    GET,
+    PATCH,
+    type PluginRouteEntry,
+    POST,
+    successResponse,
+} from "@suaveplan/api-openapi";
+import type { Campaign, UpdateCampaignInput } from "@suaveplan/campaigns";
+import type { Context } from "hono";
+import z from "zod";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { getCampaignsApiInstruments } from "../../otel/instruments.js";
+import { requireTenant } from "../shared/require-tenant.js";
+import { stripUndefined } from "../shared/strip-undefined.js";
+import {
+    CampaignIdParamSchema,
+    CampaignListResponseSchema,
+    CampaignQuerySchema,
+    CampaignResponseSchema,
+    CreateCampaignSchema,
+    EMPTY_STATS,
+    UpdateCampaignSchema,
+} from "./schemas.js";
+
+function fmt(d: Date | string | undefined | null): string | null {
+    if (d === null || d === undefined) return null;
+    if (d instanceof Date) return d.toISOString();
+    return new Date(d).toISOString();
+}
+
+function toResponse(c: Campaign): Record<string, unknown> {
+    return {
+        ...c,
+        createdAt: fmt(c.createdAt),
+        updatedAt: fmt(c.updatedAt),
+        sentAt: fmt(c.sentAt ?? null),
+        completedAt: fmt(c.completedAt ?? null),
+    };
+}
+
+function requireRepo(c: Context) {
+    const repo = c.get("campaignRepository");
+    if (repo === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaignRepository slot is empty"
+        );
+    }
+    return repo;
+}
+
+/** `GET /campaigns` — list. */
+export function buildListCampaignsRoute(): PluginRouteEntry {
+    const route = GET("/campaigns")
+        .tags("campaigns")
+        .summary("List campaigns")
+        .query(CampaignQuerySchema)
+        .response(successResponse(CampaignListResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const query = CampaignQuerySchema.parse({
+            status: c.req.query("status"),
+            type: c.req.query("type"),
+            channel: c.req.query("channel"),
+            limit: c.req.query("limit") ?? 50,
+            offset: c.req.query("offset") ?? 0,
+        });
+        const campaigns = await repo.list({
+            tenantId,
+            ...(query.status !== undefined ? { status: query.status } : {}),
+            ...(query.type !== undefined ? { type: query.type } : {}),
+            ...(query.channel !== undefined ? { channel: query.channel } : {}),
+            limit: query.limit,
+            offset: query.offset,
+        });
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "list",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: {
+                    campaigns: campaigns.map(toResponse),
+                    total: campaigns.length,
+                },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `POST /campaigns` — create. */
+export function buildCreateCampaignRoute(): PluginRouteEntry {
+    const route = POST("/campaigns")
+        .tags("campaigns")
+        .summary("Create a campaign")
+        .body(CreateCampaignSchema)
+        .response(successResponse(CampaignResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const raw = (await c.req.json().catch(() => ({}))) as unknown;
+        const parsed = CreateCampaignSchema.safeParse(raw);
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "create",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "POST /campaigns body failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        const now = new Date();
+        const data = stripUndefined(parsed.data);
+        const created = await repo.create({
+            id: crypto.randomUUID(),
+            tenantId,
+            status: "draft",
+            stats: { ...EMPTY_STATS },
+            createdAt: now,
+            updatedAt: now,
+            ...data,
+        } as unknown as Campaign);
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "create",
+            outcome: "success",
+        });
+        return c.json(
+            { success: true as const, data: toResponse(created) },
+            201
+        );
+    }
+    return { route, handler };
+}
+
+/** `GET /campaigns/:id` — read. */
+export function buildGetCampaignRoute(): PluginRouteEntry {
+    const route = GET("/campaigns/:id")
+        .tags("campaigns")
+        .summary("Get campaign by id")
+        .params(CampaignIdParamSchema)
+        .response(successResponse(CampaignResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const id = c.req.param("id");
+        const campaign = await repo.getById(id);
+        if (campaign === null || campaign.tenantId !== tenantId) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+                `campaign ${id} not found`,
+                { context: { statusCode: 404, id } }
+            );
+        }
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "get",
+            outcome: "success",
+        });
+        return c.json(
+            { success: true as const, data: toResponse(campaign) },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `PATCH /campaigns/:id` — update. */
+export function buildUpdateCampaignRoute(): PluginRouteEntry {
+    const route = PATCH("/campaigns/:id")
+        .tags("campaigns")
+        .summary("Update a campaign")
+        .params(CampaignIdParamSchema)
+        .body(UpdateCampaignSchema)
+        .response(successResponse(CampaignResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const id = c.req.param("id");
+        const raw = (await c.req.json().catch(() => ({}))) as unknown;
+        const parsed = UpdateCampaignSchema.safeParse(raw);
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "update",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "PATCH /campaigns/:id body failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        const existing = await repo.getById(id);
+        if (existing === null || existing.tenantId !== tenantId) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+                `campaign ${id} not found`,
+                { context: { statusCode: 404, id } }
+            );
+        }
+        const updated = await repo.update(
+            id,
+            stripUndefined(parsed.data) as unknown as UpdateCampaignInput
+        );
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "update",
+            outcome: "success",
+        });
+        return c.json(
+            { success: true as const, data: toResponse(updated) },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `DELETE /campaigns/:id`. */
+export function buildDeleteCampaignRoute(): PluginRouteEntry {
+    const route = DELETE("/campaigns/:id")
+        .tags("campaigns")
+        .summary("Delete a campaign")
+        .params(CampaignIdParamSchema)
+        .response(z.object({ success: z.literal(true) }))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const repo = requireRepo(c);
+        const id = c.req.param("id");
+        const existing = await repo.getById(id);
+        if (existing === null || existing.tenantId !== tenantId) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+                `campaign ${id} not found`,
+                { context: { statusCode: 404, id } }
+            );
+        }
+        await repo.delete(id);
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "delete",
+            outcome: "success",
+        });
+        return c.body(null, 204);
+    }
+    return { route, handler };
+}
+
+export { toResponse as campaignToResponse };

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/index.ts

@@ -0,0 +1,36 @@
+export {
+    buildCampaignEventsRoute,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildDuplicateCampaignRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildTestSendRoute,
+    DeliveryStatsResponseSchema,
+    EventQuerySchema,
+    TestSendSchema,
+} from "./action-routes.js";
+export { buildCampaignRoutes } from "./build-routes.js";
+export {
+    buildCreateCampaignRoute,
+    buildDeleteCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildUpdateCampaignRoute,
+    campaignToResponse,
+} from "./crud-routes.js";
+export {
+    CampaignIdParamSchema,
+    CampaignListResponseSchema,
+    type CampaignQueryInput,
+    CampaignQuerySchema,
+    CampaignResponseSchema,
+    CampaignStatsSchema,
+    CampaignStatusSchema,
+    CampaignTypeSchema,
+    type CreateCampaignBody,
+    CreateCampaignSchema,
+    EMPTY_STATS,
+    type UpdateCampaignBody,
+    UpdateCampaignSchema,
+} from "./schemas.js";

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/schemas.md

@@ -0,0 +1,85 @@
+# Campaign route schemas
+
+## Purpose
+
+This module is the OpenAPI-facing contract for the `/campaigns` route
+tree. Every incoming request body, query string, and path parameter is
+validated through a schema declared here, and every response sent to
+clients conforms to one of the response schemas. Centralising the
+schemas keeps the Zod definitions in sync between request validation
+(at handler entry) and OpenAPI generation (at registry registration
+time) — both consume the exact same schema instance.
+
+Enum unions for `CampaignStatus` and `CampaignType` are reproduced
+locally rather than imported from `@suaveplan/campaigns` because the
+schema bundle is captured into the OpenAPI spec, which needs the enum
+values inlined. The cost of duplication is small and the test suite
+asserts every member, so drift between the two sources is caught the
+moment it occurs.
+
+## Features
+
+- 4 input schemas: `CampaignIdParamSchema`, `CreateCampaignSchema`,
+  `UpdateCampaignSchema`, `CampaignQuerySchema`.
+- 3 response schemas: `CampaignResponseSchema`, `CampaignStatsSchema`,
+  `CampaignListResponseSchema`.
+- Documented defaults at every optional field (`type`, `channel`,
+  `audienceConfig.groupIds`, `templateData`, `metadata`,
+  `CampaignQuerySchema.limit/offset`).
+- `EMPTY_STATS` constant — the zero-baseline counter bundle used by
+  `POST /campaigns` and `/duplicate`.
+- Coerced numeric query parameters (`limit`, `offset`) so query
+  strings like `?limit=25` round-trip cleanly without manual parsing.
+
+## Usage: Basic
+
+```ts
+import { CreateCampaignSchema } from "@suaveplan/api-plugin-campaigns";
+
+const body = await c.req.json();
+const parsed = CreateCampaignSchema.parse(body);
+// parsed.name is guaranteed non-empty; parsed.type defaults to "broadcast".
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    CampaignListResponseSchema,
+    CampaignQuerySchema,
+} from "@suaveplan/api-plugin-campaigns";
+
+const query = CampaignQuerySchema.parse(c.req.query());
+const campaigns = await repo.list({ tenantId, ...query });
+const response = CampaignListResponseSchema.parse({
+    campaigns: campaigns.map(toResponse),
+    total: campaigns.length,
+});
+return c.json(response, 200);
+```
+
+## API Reference
+
+- `CampaignIdParamSchema: z.ZodObject<{ id: ZodString }>`
+- `CreateCampaignSchema: z.ZodObject<{...}>` — body for `POST /campaigns`.
+- `UpdateCampaignSchema: z.ZodObject<{...}>` — body for `PATCH`.
+- `CampaignQuerySchema: z.ZodObject<{...}>` — query string for `GET`.
+- `CampaignStatusSchema`, `CampaignTypeSchema` — enum guards.
+- `CampaignResponseSchema`, `CampaignListResponseSchema`,
+  `CampaignStatsSchema` — response shapes.
+- `EMPTY_STATS: Readonly<CampaignStats>` — zero baseline.
+- `type CreateCampaignBody`, `UpdateCampaignBody`, `CampaignQueryInput`
+  — inferred TypeScript types.
+
+## Implementation Notes
+
+`audienceConfig` is modelled as an object schema with `groupIds`
+required (default `[]`) rather than a free-form `z.record` because
+downstream consumers — including the `Campaign.audienceConfig` field
+in `@suaveplan/campaigns` — rely on `groupIds` being present. The
+optional surrounding fields (`excludeGroupIds`, `segmentIds`, …) are
+preserved at the schema boundary so the upstream domain logic can
+treat them as opt-in. Date fields appear as ISO 8601 strings in the
+response schema rather than `Date` instances because OpenAPI consumers
+deserialise JSON and only get strings; the route handlers call
+`.toISOString()` at the boundary so the contract is honest.

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/schemas.test.ts

@@ -0,0 +1,146 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CampaignIdParamSchema,
+    CampaignListResponseSchema,
+    CampaignQuerySchema,
+    CampaignResponseSchema,
+    CampaignStatusSchema,
+    CampaignTypeSchema,
+    CreateCampaignSchema,
+    EMPTY_STATS,
+    UpdateCampaignSchema,
+} from "./schemas.js";
+
+describe("campaign route schemas", () => {
+    it("CampaignStatusSchema accepts all 7 statuses", { timeout: 5000 }, () => {
+        for (const s of [
+            "draft",
+            "scheduled",
+            "sending",
+            "paused",
+            "completed",
+            "cancelled",
+            "failed",
+        ] as const) {
+            expect(CampaignStatusSchema.parse(s)).toBe(s);
+        }
+        expect(() => CampaignStatusSchema.parse("bogus")).toThrow();
+    });
+
+    it("CampaignTypeSchema accepts all 4 types", { timeout: 5000 }, () => {
+        for (const t of [
+            "broadcast",
+            "triggered",
+            "ab_test",
+            "drip",
+        ] as const) {
+            expect(CampaignTypeSchema.parse(t)).toBe(t);
+        }
+        expect(() => CampaignTypeSchema.parse("bogus")).toThrow();
+    });
+
+    it("CampaignIdParamSchema rejects empty id", { timeout: 5000 }, () => {
+        expect(() => CampaignIdParamSchema.parse({ id: "" })).toThrow();
+        expect(CampaignIdParamSchema.parse({ id: "a" })).toEqual({ id: "a" });
+    });
+
+    it("CreateCampaignSchema applies all documented defaults", {
+        timeout: 5000,
+    }, () => {
+        const parsed = CreateCampaignSchema.parse({ name: "x" });
+        expect(parsed.type).toBe("broadcast");
+        expect(parsed.channel).toBe("email");
+        expect(parsed.audienceConfig).toEqual({ groupIds: [] });
+        expect(parsed.templateData).toEqual({});
+        expect(parsed.metadata).toEqual({});
+    });
+
+    it("CreateCampaignSchema rejects empty name", { timeout: 5000 }, () => {
+        expect(() => CreateCampaignSchema.parse({ name: "" })).toThrow();
+    });
+
+    it("CreateCampaignSchema accepts a full body", { timeout: 5000 }, () => {
+        const out = CreateCampaignSchema.parse({
+            name: "Promo",
+            type: "drip",
+            channel: "sms",
+            audienceConfig: {
+                groupIds: ["g1"],
+                excludeGroupIds: ["g2"],
+            },
+            templateId: "tpl1",
+            templateData: { foo: 1 },
+            schedule: { type: "immediate" },
+            throttle: { messagesPerSecond: 5 },
+            abTestConfig: { splitType: "even" },
+            metadata: { campaignId: "X" },
+        });
+        expect(out.type).toBe("drip");
+        expect(out.audienceConfig.groupIds).toEqual(["g1"]);
+    });
+
+    it("UpdateCampaignSchema accepts a partial body", { timeout: 5000 }, () => {
+        const out = UpdateCampaignSchema.parse({ name: "New" });
+        expect(out.name).toBe("New");
+    });
+
+    it("UpdateCampaignSchema rejects empty name", { timeout: 5000 }, () => {
+        expect(() => UpdateCampaignSchema.parse({ name: "" })).toThrow();
+    });
+
+    it("CampaignQuerySchema coerces query strings and applies defaults", {
+        timeout: 5000,
+    }, () => {
+        const out = CampaignQuerySchema.parse({
+            status: "draft",
+            type: "broadcast",
+            limit: "25",
+            offset: "5",
+        });
+        expect(out.limit).toBe(25);
+        expect(out.offset).toBe(5);
+        expect(out.status).toBe("draft");
+    });
+
+    it("CampaignQuerySchema clamps limit between 1 and 200", {
+        timeout: 5000,
+    }, () => {
+        expect(() => CampaignQuerySchema.parse({ limit: 0 })).toThrow();
+        expect(() => CampaignQuerySchema.parse({ limit: 300 })).toThrow();
+    });
+
+    it("CampaignResponseSchema accepts a minimally valid response", {
+        timeout: 5000,
+    }, () => {
+        const ok = CampaignResponseSchema.safeParse({
+            id: "1",
+            tenantId: "t",
+            name: "x",
+            status: "draft",
+            type: "broadcast",
+            channel: "email",
+            audienceConfig: { groupIds: [] },
+            templateData: {},
+            metadata: {},
+            stats: EMPTY_STATS,
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+        });
+        expect(ok.success).toBe(true);
+    });
+
+    it("CampaignListResponseSchema wraps the campaign array", {
+        timeout: 5000,
+    }, () => {
+        const ok = CampaignListResponseSchema.safeParse({
+            campaigns: [],
+            total: 0,
+        });
+        expect(ok.success).toBe(true);
+    });
+
+    it("EMPTY_STATS exposes every zero counter", { timeout: 5000 }, () => {
+        expect(Object.values(EMPTY_STATS).every((v) => v === 0)).toBe(true);
+        expect(Object.keys(EMPTY_STATS)).toHaveLength(9);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/campaigns/schemas.ts

@@ -0,0 +1,148 @@
+/**
+ * Zod request + response schemas for the `/campaigns` route tree.
+ *
+ * These are the OpenAPI surface contract — the response shape exposed
+ * to OpenAPI consumers and the validated boundary applied to every
+ * incoming body, query, and path parameter. Schemas are deliberately
+ * conservative: enums are reproduced rather than imported (the
+ * upstream `CampaignStatus` union string-literal is replicated so the
+ * OpenAPI schema stays self-contained), and timestamps are serialised
+ * as ISO 8601 strings rather than `Date` instances so JSON round-trips
+ * cleanly.
+ */
+
+import z from "zod";
+
+/** Lifecycle status — kept in sync with `@suaveplan/campaigns`. */
+export const CampaignStatusSchema = z.enum([
+    "draft",
+    "scheduled",
+    "sending",
+    "paused",
+    "completed",
+    "cancelled",
+    "failed",
+]);
+
+/** Campaign type — kept in sync with `@suaveplan/campaigns`. */
+export const CampaignTypeSchema = z.enum([
+    "broadcast",
+    "triggered",
+    "ab_test",
+    "drip",
+]);
+
+/** Path param `:id` — non-empty string. */
+export const CampaignIdParamSchema = z.object({
+    id: z.string().min(1),
+});
+
+/** Body for `POST /campaigns`. */
+export const CreateCampaignSchema = z.object({
+    name: z.string().min(1).max(255),
+    type: CampaignTypeSchema.default("broadcast"),
+    channel: z.string().min(1).default("email"),
+    audienceConfig: z
+        .object({
+            groupIds: z.array(z.string()).default([]),
+            excludeGroupIds: z.array(z.string()).optional(),
+            excludeContactIds: z.array(z.string()).optional(),
+            segmentIds: z.array(z.string()).optional(),
+            suppressionListIds: z.array(z.string()).optional(),
+        })
+        .default({ groupIds: [] }),
+    templateId: z.string().optional(),
+    templateData: z.record(z.string(), z.unknown()).default({}),
+    schedule: z.record(z.string(), z.unknown()).optional(),
+    throttle: z.record(z.string(), z.unknown()).optional(),
+    abTestConfig: z.record(z.string(), z.unknown()).optional(),
+    metadata: z.record(z.string(), z.unknown()).default({}),
+});
+
+/** Body for `PATCH /campaigns/:id`. */
+export const UpdateCampaignSchema = z.object({
+    name: z.string().min(1).max(255).optional(),
+    channel: z.string().min(1).optional(),
+    audienceConfig: z
+        .object({
+            groupIds: z.array(z.string()),
+            excludeGroupIds: z.array(z.string()).optional(),
+            excludeContactIds: z.array(z.string()).optional(),
+            segmentIds: z.array(z.string()).optional(),
+            suppressionListIds: z.array(z.string()).optional(),
+        })
+        .optional(),
+    templateId: z.string().optional(),
+    templateData: z.record(z.string(), z.unknown()).optional(),
+    schedule: z.record(z.string(), z.unknown()).optional(),
+    throttle: z.record(z.string(), z.unknown()).optional(),
+    abTestConfig: z.record(z.string(), z.unknown()).optional(),
+    metadata: z.record(z.string(), z.unknown()).optional(),
+});
+
+/** Query string for `GET /campaigns`. */
+export const CampaignQuerySchema = z.object({
+    status: CampaignStatusSchema.optional(),
+    type: CampaignTypeSchema.optional(),
+    channel: z.string().min(1).optional(),
+    limit: z.coerce.number().int().min(1).max(200).default(50),
+    offset: z.coerce.number().int().min(0).default(0),
+});
+
+/** Stats sub-schema reused by `CampaignResponseSchema`. */
+export const CampaignStatsSchema = z.object({
+    totalRecipients: z.number(),
+    sent: z.number(),
+    delivered: z.number(),
+    opened: z.number(),
+    clicked: z.number(),
+    bounced: z.number(),
+    unsubscribed: z.number(),
+    complained: z.number(),
+    failed: z.number(),
+});
+
+/** Response shape for a single campaign. */
+export const CampaignResponseSchema = z.object({
+    id: z.string(),
+    tenantId: z.string(),
+    name: z.string(),
+    status: CampaignStatusSchema,
+    type: CampaignTypeSchema,
+    channel: z.string(),
+    audienceConfig: z.record(z.string(), z.unknown()),
+    templateId: z.string().nullable().optional(),
+    templateData: z.record(z.string(), z.unknown()).optional(),
+    schedule: z.record(z.string(), z.unknown()).nullable().optional(),
+    throttle: z.record(z.string(), z.unknown()).nullable().optional(),
+    abTestConfig: z.record(z.string(), z.unknown()).nullable().optional(),
+    metadata: z.record(z.string(), z.unknown()),
+    stats: CampaignStatsSchema,
+    createdAt: z.string(),
+    updatedAt: z.string(),
+    sentAt: z.string().nullable().optional(),
+    completedAt: z.string().nullable().optional(),
+});
+
+/** Response shape for `GET /campaigns`. */
+export const CampaignListResponseSchema = z.object({
+    campaigns: z.array(CampaignResponseSchema),
+    total: z.number(),
+});
+
+/** Empty stats baseline used by `POST /campaigns`. */
+export const EMPTY_STATS = {
+    totalRecipients: 0,
+    sent: 0,
+    delivered: 0,
+    opened: 0,
+    clicked: 0,
+    bounced: 0,
+    unsubscribed: 0,
+    complained: 0,
+    failed: 0,
+} as const;
+
+export type CreateCampaignBody = z.infer<typeof CreateCampaignSchema>;
+export type UpdateCampaignBody = z.infer<typeof UpdateCampaignSchema>;
+export type CampaignQueryInput = z.infer<typeof CampaignQuerySchema>;

packages/api-stack/api/api-plugin-campaigns/src/routes/index.ts

@@ -0,0 +1,67 @@
+export { buildCampaignRoutes } from "./campaigns/build-routes.js";
+export {
+    buildCampaignEventsRoute,
+    buildCampaignStatsRoute,
+    buildCancelCampaignRoute,
+    buildCreateCampaignRoute,
+    buildDeleteCampaignRoute,
+    buildDuplicateCampaignRoute,
+    buildGetCampaignRoute,
+    buildListCampaignsRoute,
+    buildPauseCampaignRoute,
+    buildSendCampaignRoute,
+    buildTestSendRoute,
+    buildUpdateCampaignRoute,
+    CampaignIdParamSchema,
+    CampaignListResponseSchema,
+    type CampaignQueryInput,
+    CampaignQuerySchema,
+    CampaignResponseSchema,
+    CampaignStatsSchema,
+    CampaignStatusSchema,
+    CampaignTypeSchema,
+    type CreateCampaignBody,
+    CreateCampaignSchema,
+    campaignToResponse,
+    DeliveryStatsResponseSchema,
+    EMPTY_STATS,
+    EventQuerySchema,
+    TestSendSchema,
+    type UpdateCampaignBody,
+    UpdateCampaignSchema,
+} from "./campaigns/index.js";
+export {
+    requireTenant,
+    stripUndefined,
+    type TenantPrincipal,
+} from "./shared/index.js";
+export {
+    buildCheckSuppressionRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteSuppressionRoute,
+    buildListSuppressionRoute,
+    buildSuppressionRoutes,
+    type CreateSuppressionBody,
+    CreateSuppressionSchema,
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+    SuppressionIdParamSchema,
+    SuppressionListResponseSchema,
+    type SuppressionQueryInput,
+    SuppressionQuerySchema,
+    SuppressionReasonSchema,
+    SuppressionResponseSchema,
+} from "./suppression/index.js";
+export {
+    buildDeliveryWebhookRoute,
+    buildUnsubscribeRoute,
+    buildWebhookRoutes,
+    DeliveryEventTypeSchema,
+    type DeliveryWebhookBody,
+    DeliveryWebhookResponseSchema,
+    DeliveryWebhookSchema,
+    decodeUnsubscribeToken,
+    UnsubscribeResponseSchema,
+    UnsubscribeTokenParamSchema,
+    type UnsubscribeTokenPayload,
+} from "./webhooks/index.js";

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/index.ts

@@ -0,0 +1,2 @@
+export { requireTenant, type TenantPrincipal } from "./require-tenant.js";
+export { stripUndefined } from "./strip-undefined.js";

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/require-tenant.md

@@ -0,0 +1,83 @@
+# `require-tenant`
+
+## Purpose
+
+`requireTenant` extracts the request principal from the Hono context
+slot `c.get("user")` (populated by `@suaveplan/api-plugin-auth` before
+route dispatch) and either returns its non-empty `tenantId` plus
+optional `id` or throws `CampaignsApiError` carrying the
+`CAMPAIGNS_API.TENANT_REQUIRED` code with HTTP 401 wired into the
+error's context. This is the single tenant-presence gate every
+campaign, suppression, and webhook route relies on, so handlers can
+treat `tenantId` as a definitely-present string thereafter.
+
+The helper does not consult a tenant resolver fallback (no
+`?? "default"` short-circuit). Multi-tenant correctness is the
+campaigns plugin's primary obligation — silently falling back to a
+shared tenant would let one tenant's misconfiguration leak data into
+another's namespace. Failing closed with a 401 surfaces the problem
+loudly.
+
+## Features
+
+- Pure synchronous read; no I/O, no DB, no allocator churn.
+- Treats `null`, `undefined`, missing `tenantId`, non-string
+  `tenantId`, and empty-string `tenantId` as equally invalid.
+- Returns a frozen-shape object (`{ id, tenantId }`) — `id` is
+  optional in the principal but always a string in the return value
+  (falls back to `""`).
+- Throws `CampaignsApiError(TENANT_REQUIRED)` with
+  `context.statusCode === 401` so the package error handler can map
+  uniformly.
+
+## Usage: Basic
+
+```ts
+import { requireTenant } from "@suaveplan/api-plugin-campaigns";
+
+app.openapi(listRoute, async (c) => {
+    const { tenantId } = requireTenant(c);
+    const result = await c.get("campaignRepository").list({ tenantId });
+    return c.json({ campaigns: result, total: result.length }, 200);
+});
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+    requireTenant,
+} from "@suaveplan/api-plugin-campaigns";
+
+async function authorize(c: Context, target: { tenantId: string }) {
+    const { tenantId } = requireTenant(c);
+    if (target.tenantId !== tenantId) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.CAMPAIGN_NOT_FOUND,
+            "campaign belongs to a different tenant",
+            { context: { statusCode: 404 } }
+        );
+    }
+}
+```
+
+## API Reference
+
+- `interface TenantPrincipal { readonly id: string; readonly tenantId: string }`
+- `requireTenant(c: Context): TenantPrincipal` — returns the principal
+  or throws `CampaignsApiError(TENANT_REQUIRED)`.
+
+## Implementation Notes
+
+The principal type is cast through `unknown` rather than imported from
+`@suaveplan/api-plugin-auth` because the campaigns plugin must
+type-check in isolation (consumers may swap in a different auth
+provider). The structural check (`typeof principal.tenantId ===
+"string" && principal.tenantId.length > 0`) is intentionally explicit:
+TypeScript's narrowing for record-typed `unknown` does not collapse
+the two checks into one. The empty-string check is the load-bearing
+one — Zod's `min(1)` on the auth side prevents most empty values, but
+defending against an out-of-band setter (e.g. a test fixture passing
+`{ tenantId: "" }`) keeps the contract honest.

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/require-tenant.test.ts

@@ -0,0 +1,94 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { Hono } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { requireTenant } from "./require-tenant.js";
+
+function makeContext(principal: unknown) {
+    const app = new Hono();
+    let captured: { id: string; tenantId: string } | undefined;
+    let caught: unknown;
+    app.use("*", async (c, next) => {
+        if (principal !== undefined) {
+            c.set("user", principal as never);
+        }
+        try {
+            captured = requireTenant(c);
+        } catch (err) {
+            caught = err;
+        }
+        await next();
+    });
+    app.get("/", (c) => c.text("ok"));
+    return { app, get: () => ({ captured, caught }) };
+}
+
+describe("requireTenant", () => {
+    it("returns id + tenantId when principal carries both", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext({ id: "u1", tenantId: "t1" });
+        await app.request("/");
+        expect(get().captured).toEqual({ id: "u1", tenantId: "t1" });
+    });
+
+    it("falls back to empty id when principal has no id field", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext({ tenantId: "t1" });
+        await app.request("/");
+        expect(get().captured).toEqual({ id: "", tenantId: "t1" });
+    });
+
+    it("throws TENANT_REQUIRED when user is null", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext(null);
+        await app.request("/");
+        const err = get().caught;
+        expect(err).toBeInstanceOf(CampaignsApiError);
+        expect((err as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("throws TENANT_REQUIRED when user is undefined", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext(undefined);
+        await app.request("/");
+        expect((get().caught as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("throws TENANT_REQUIRED when tenantId is the empty string", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext({ id: "u", tenantId: "" });
+        await app.request("/");
+        expect((get().caught as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("throws TENANT_REQUIRED when tenantId is not a string", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext({ id: "u", tenantId: 42 });
+        await app.request("/");
+        expect((get().caught as CampaignsApiError).code).toBe(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED
+        );
+    });
+
+    it("falls back to empty id when id is the empty string", {
+        timeout: 5000,
+    }, async () => {
+        const { app, get } = makeContext({ id: "", tenantId: "t1" });
+        await app.request("/");
+        expect(get().captured).toEqual({ id: "", tenantId: "t1" });
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/require-tenant.ts

@@ -0,0 +1,51 @@
+/**
+ * Tenant-extraction helper. Reads the `Principal` from `c.get("user")`
+ * and either returns its non-empty `tenantId` or throws
+ * `CampaignsApiError(TENANT_REQUIRED)` mapped to HTTP 401. Routes call
+ * this once at handler entry so the rest of the handler can treat
+ * `tenantId` as definitely present.
+ */
+
+import type { Context } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+
+/** Principal payload extracted at the request boundary. */
+export interface TenantPrincipal {
+    readonly id: string;
+    readonly tenantId: string;
+}
+
+/**
+ * Return `{ id, tenantId }` from the request principal or throw
+ * `CAMPAIGNS_API.TENANT_REQUIRED` (HTTP 401). The shared helper
+ * eliminates the upstream port's repeated four-line
+ * `c.get("user")?.tenantId` checks and the `as any` casts they relied on.
+ */
+export function requireTenant(c: Context): TenantPrincipal {
+    const principal = c.get("user") as
+        | { id?: unknown; tenantId?: unknown }
+        | null
+        | undefined;
+    if (
+        principal === null ||
+        principal === undefined ||
+        typeof principal.tenantId !== "string" ||
+        principal.tenantId.length === 0
+    ) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.TENANT_REQUIRED,
+            "request principal is missing a tenantId",
+            { context: { statusCode: 401 } }
+        );
+    }
+    return {
+        id:
+            typeof principal.id === "string" && principal.id.length > 0
+                ? principal.id
+                : "",
+        tenantId: principal.tenantId,
+    };
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/strip-undefined.md

@@ -0,0 +1,70 @@
+# `strip-undefined`
+
+## Purpose
+
+`stripUndefined` is a route-layer adapter that bridges Zod's
+`optional()` output (`T | undefined`) with the
+`exactOptionalPropertyTypes: true` repository input types declared in
+`@suaveplan/campaigns` and the local `CampaignSuppressionStore`. When a
+route handler validates a request body through a Zod schema, optional
+fields surface as either the declared type or `undefined`; passing the
+parsed object straight to the repository fails the `exactOptional`
+check at compile time. This helper produces a shallow clone with every
+`undefined`-valued key removed so the downstream type narrows.
+
+The helper is intentionally minimal — no recursion, no `null` handling,
+no key-name filtering — because every concrete usage in the routes
+layer passes a Zod-parsed object whose nesting has already been
+normalised. Recursion would obscure the cost model and tempt callers
+to use it as a deep-clean utility, which is out of scope.
+
+## Features
+
+- Shallow-only filter; nested objects are forwarded by reference.
+- `null` values are preserved (only `=== undefined` triggers removal).
+- Returns a fresh object reference every call (never mutates input).
+- Generic-typed return narrows `T[K]` to `Exclude<T[K], undefined>`.
+
+## Usage: Basic
+
+```ts
+import { stripUndefined } from "@suaveplan/api-plugin-campaigns";
+
+const body = { name: "x", templateId: undefined } as const;
+const clean = stripUndefined(body);
+// clean: { name: "x" } — `templateId` removed.
+```
+
+## Usage: Advanced
+
+```ts
+import { stripUndefined } from "@suaveplan/api-plugin-campaigns";
+
+const parsed = CreateCampaignSchema.parse(input);
+await repo.create({
+    id: idGen(),
+    tenantId,
+    ...stripUndefined(parsed),
+    status: "draft",
+    stats: EMPTY_STATS,
+    createdAt: now,
+    updatedAt: now,
+});
+```
+
+## API Reference
+
+- `stripUndefined<T extends Record<string, unknown>>(input: T):
+  { [K in keyof T]: Exclude<T[K], undefined> }` — shallow copy with
+  `undefined`-valued keys removed.
+
+## Implementation Notes
+
+The implementation iterates `Object.entries(input)` once and writes
+into a fresh `Record<string, unknown>` accumulator. The output is then
+cast to the narrowed mapped type — a single assertion confined to the
+return statement. The accumulator is not pre-sized because the helper
+is hot-path-cheap (single object scan) and JavaScript engines do not
+benefit from `new Object()` capacity hints. The forbidden `Object.assign`
+path (which would forward `undefined` properties when iterating
+`Object.keys`) is intentionally avoided.

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/strip-undefined.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { stripUndefined } from "./strip-undefined.js";
+
+describe("stripUndefined", () => {
+    it("removes keys whose values are undefined", { timeout: 5000 }, () => {
+        const out = stripUndefined({ a: 1, b: undefined, c: "x" });
+        expect(out).toEqual({ a: 1, c: "x" });
+    });
+
+    it("preserves null values", { timeout: 5000 }, () => {
+        const out = stripUndefined({ a: null, b: undefined });
+        expect(out).toEqual({ a: null });
+    });
+
+    it("returns a fresh object instance", { timeout: 5000 }, () => {
+        const input = { a: 1 };
+        const out = stripUndefined(input);
+        expect(out).not.toBe(input);
+        expect(out).toEqual(input);
+    });
+
+    it("handles an empty object", { timeout: 5000 }, () => {
+        expect(stripUndefined({})).toEqual({});
+    });
+
+    it("does not strip falsy non-undefined values", { timeout: 5000 }, () => {
+        const out = stripUndefined({ a: 0, b: "", c: false, d: undefined });
+        expect(out).toEqual({ a: 0, b: "", c: false });
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/shared/strip-undefined.ts

@@ -0,0 +1,23 @@
+/**
+ * Strip keys whose values are exactly `undefined`. Used at every
+ * route → repo boundary to bridge Zod's `optional()` semantics
+ * (which produce `T | undefined`) with the
+ * `exactOptionalPropertyTypes: true` input types in
+ * `@suaveplan/campaigns` and the suppression store (which forbid the
+ * `| undefined` half).
+ */
+
+/**
+ * Return a shallow copy of the input with all keys whose values are
+ * exactly `undefined` removed. Non-`undefined` values are preserved
+ * as-is; `null` is preserved.
+ */
+export function stripUndefined<T extends Record<string, unknown>>(
+    input: T
+): { [K in keyof T]: Exclude<T[K], undefined> } {
+    const out: Record<string, unknown> = {};
+    for (const [k, v] of Object.entries(input)) {
+        if (v !== undefined) out[k] = v;
+    }
+    return out as { [K in keyof T]: Exclude<T[K], undefined> };
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/build-routes.md

@@ -0,0 +1,61 @@
+# `build-routes` (suppression)
+
+## Purpose
+
+`buildSuppressionRoutes` aggregates the four `/suppression/*` plugin
+route entries in canonical order (list, check, create, delete). The
+plugin's `onInit` consumes the array verbatim, so the OpenAPI spec
+order is deterministic and tests can assert it as a contract. Keeping
+the aggregator in its own module (rather than collapsed into the
+`routes.ts` file) mirrors the layout used elsewhere in the
+`@suaveplan/*` plugin family — code-search "build-routes" always
+finds the canonical-order anchor.
+
+## Features
+
+- Returns 4 entries in the documented canonical order.
+- Pure — no I/O, no captured state, no configuration knobs.
+- Each entry is independently mountable on a bare `Hono` app for
+  testing.
+
+## Usage: Basic
+
+```ts
+import { buildSuppressionRoutes } from "@suaveplan/api-plugin-campaigns";
+
+for (const e of buildSuppressionRoutes()) {
+    app[e.route.method as "get" | "post" | "delete"](e.route.path, (c) =>
+        e.handler(c)
+    );
+}
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildSuppressionRoutes,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+const entries = buildSuppressionRoutes().map((e) => ({
+    ...e,
+    route: { ...e.route, path: `/api${e.route.path}` },
+}));
+definePluginRoutes(entries, { app, registry, pluginName: "campaigns" });
+```
+
+## API Reference
+
+- `buildSuppressionRoutes(): readonly PluginRouteEntry[]` — returns
+  the 4 entries in canonical order.
+
+## Implementation Notes
+
+The check endpoint sits at position 2 (between list and create)
+because cache-friendly `GET` reads precede writes in the canonical
+order — operator-facing OpenAPI consumers naturally scan the read
+surface first when assessing rate-limit and caching budgets. The
+delete endpoint is last so the OpenAPI consumer reading the spec
+top-down sees the destructive operation last and is prompted to
+consider authentication scope before mounting.

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/build-routes.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { buildSuppressionRoutes } from "./build-routes.js";
+
+describe("buildSuppressionRoutes", () => {
+    it("returns 4 entries in canonical order", { timeout: 5000 }, () => {
+        const entries = buildSuppressionRoutes();
+        expect(entries.map((e) => `${e.route.method} ${e.route.path}`)).toEqual(
+            [
+                "get /suppression",
+                "get /suppression/check",
+                "post /suppression",
+                "delete /suppression/:id",
+            ]
+        );
+    });
+
+    it("every entry tagged 'suppression'", { timeout: 5000 }, () => {
+        for (const e of buildSuppressionRoutes()) {
+            expect(e.route.tags).toEqual(["suppression"]);
+        }
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/build-routes.ts

@@ -0,0 +1,22 @@
+/**
+ * Aggregator returning every `/suppression/*` `PluginRouteEntry` in
+ * canonical order: list, check, create, delete.
+ */
+
+import type { PluginRouteEntry } from "@suaveplan/api-openapi";
+import {
+    buildCheckSuppressionRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteSuppressionRoute,
+    buildListSuppressionRoute,
+} from "./routes.js";
+
+/** Returns the 4 `/suppression/*` plugin-route entries. */
+export function buildSuppressionRoutes(): readonly PluginRouteEntry[] {
+    return [
+        buildListSuppressionRoute(),
+        buildCheckSuppressionRoute(),
+        buildCreateSuppressionRoute(),
+        buildDeleteSuppressionRoute(),
+    ];
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/index.ts

@@ -0,0 +1,19 @@
+export { buildSuppressionRoutes } from "./build-routes.js";
+export {
+    buildCheckSuppressionRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteSuppressionRoute,
+    buildListSuppressionRoute,
+} from "./routes.js";
+export {
+    type CreateSuppressionBody,
+    CreateSuppressionSchema,
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+    SuppressionIdParamSchema,
+    SuppressionListResponseSchema,
+    type SuppressionQueryInput,
+    SuppressionQuerySchema,
+    SuppressionReasonSchema,
+    SuppressionResponseSchema,
+} from "./schemas.js";

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/routes.md

@@ -0,0 +1,77 @@
+# Suppression routes
+
+## Purpose
+
+The suppression-route module owns the four endpoints that manage the
+`(tenantId, channel, channelValue)`-keyed suppression list: list, check
+(point lookup), create, and delete. Every handler tenant-guards via
+`requireTenant` before touching the store, so a misconfigured auth
+layer cannot silently expose cross-tenant data. The store's duplicate
+detection raises `CAMPAIGNS_API.DUPLICATE_SUPPRESSION` on a colliding
+create — the route layer trusts that signal and propagates the error
+verbatim.
+
+The check endpoint is intentionally a `GET` (not a `POST` body) so it
+is cacheable and CORS-trivial. Sender pipelines hit it on every
+outbound decision; a body-less GET with two query parameters is
+faster, smaller, and easier to log redact than a JSON `POST`.
+
+## Features
+
+- 4 builders: `buildListSuppressionRoute`,
+  `buildCheckSuppressionRoute`, `buildCreateSuppressionRoute`,
+  `buildDeleteSuppressionRoute`.
+- Tenant-scoped: every handler enforces non-empty `tenantId`.
+- 400 on Zod failure, 404 on missing delete target, 409 on duplicate
+  add (raised by the store).
+- OTel counter per route with `outcome` attribute.
+
+## Usage: Basic
+
+```ts
+import { buildCreateSuppressionRoute } from "@suaveplan/api-plugin-campaigns";
+
+const entry = buildCreateSuppressionRoute();
+app.post(entry.route.path, (c) => entry.handler(c));
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildCheckSuppressionRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteSuppressionRoute,
+    buildListSuppressionRoute,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+definePluginRoutes(
+    [
+        buildListSuppressionRoute(),
+        buildCheckSuppressionRoute(),
+        buildCreateSuppressionRoute(),
+        buildDeleteSuppressionRoute(),
+    ],
+    { app, registry, pluginName: "campaigns" }
+);
+```
+
+## API Reference
+
+- `buildListSuppressionRoute(): PluginRouteEntry`
+- `buildCheckSuppressionRoute(): PluginRouteEntry`
+- `buildCreateSuppressionRoute(): PluginRouteEntry`
+- `buildDeleteSuppressionRoute(): PluginRouteEntry`
+
+## Implementation Notes
+
+The delete handler enforces `requireTenant` even though the entry id
+is a global key. The defence is layered: deletion through an
+authenticated request keeps a malicious caller from probing for valid
+ids by hitting `DELETE /suppression/<guess>` and reading the response.
+The 404 leak (revealing a non-existent id vs. a valid id) is mitigated
+because `store.remove` is `O(1)` and returns a stable boolean
+regardless of tenant ownership. If cross-tenant id enumeration becomes
+a concern, a future change can tighten the contract to require
+`(tenantId, channel, channelValue)` rather than `id`.

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/routes.test.ts

@@ -0,0 +1,296 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { Hono } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { InMemoryCampaignSuppressionStore } from "../../repositories/suppression/suppression-memory.js";
+import {
+    buildCheckSuppressionRoute,
+    buildCreateSuppressionRoute,
+    buildDeleteSuppressionRoute,
+    buildListSuppressionRoute,
+} from "./routes.js";
+import "../../context/context.js";
+
+function makeStore() {
+    let nextId = 0;
+    let nextTime = 1_700_000_000_000;
+    return new InMemoryCampaignSuppressionStore({
+        clock: () => {
+            const t = nextTime;
+            nextTime += 1;
+            return t;
+        },
+        idGenerator: () => `s${++nextId}`,
+    });
+}
+
+function makeApp(
+    store: InMemoryCampaignSuppressionStore,
+    principal: object | null = { id: "u", tenantId: "t" }
+): Hono {
+    const app = new Hono();
+    app.use("*", async (c, next) => {
+        if (principal !== null) c.set("user", principal as never);
+        c.set("campaignSuppressionStore", store);
+        c.set("eventBus", { emit: () => undefined } as never);
+        await next();
+    });
+    app.onError((err, c) => {
+        if (err instanceof CampaignsApiError) {
+            const status = ((err.context as { statusCode?: number } | undefined)
+                ?.statusCode ?? 500) as 400 | 401 | 404 | 409 | 500;
+            return c.json({ code: err.code, error: err.message }, status);
+        }
+        return c.json({ error: String(err) }, 500);
+    });
+    for (const e of [
+        buildListSuppressionRoute(),
+        buildCheckSuppressionRoute(),
+        buildCreateSuppressionRoute(),
+        buildDeleteSuppressionRoute(),
+    ]) {
+        const method = e.route.method as "get" | "post" | "delete";
+        app[method](e.route.path, (c) => e.handler(c as never));
+    }
+    return app;
+}
+
+describe("suppression routes", () => {
+    it("POST /suppression creates an entry", { timeout: 5000 }, async () => {
+        const store = makeStore();
+        const app = makeApp(store);
+        const res = await app.request("/suppression", {
+            method: "POST",
+            body: JSON.stringify({
+                channelValue: "a@b.c",
+                reason: "bounce",
+                source: "import",
+                metadata: { x: 1 },
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(201);
+        const body = await res.json();
+        expect(body.data.channel).toBe("email");
+        expect(body.data.reason).toBe("bounce");
+        expect(body.data.source).toBe("import");
+    });
+
+    it("POST /suppression rejects invalid body", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request("/suppression", {
+            method: "POST",
+            body: JSON.stringify({ channelValue: "", reason: "bounce" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("POST /suppression returns 401 without principal", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore(), null);
+        const res = await app.request("/suppression", {
+            method: "POST",
+            body: JSON.stringify({
+                channelValue: "a@b.c",
+                reason: "bounce",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(401);
+    });
+
+    it("GET /suppression lists entries with filters", {
+        timeout: 5000,
+    }, async () => {
+        const store = makeStore();
+        await store.add({
+            tenantId: "t",
+            channel: "email",
+            channelValue: "a@b.c",
+            reason: "bounce",
+        });
+        const app = makeApp(store);
+        const res = await app.request(
+            "/suppression?channel=email&reason=bounce&limit=10"
+        );
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.total).toBe(1);
+    });
+
+    it("GET /suppression lists with default pagination", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request("/suppression");
+        expect(res.status).toBe(200);
+    });
+
+    it("GET /suppression/check returns suppressed=false when missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request(
+            "/suppression/check?channel=email&channelValue=a@b.c"
+        );
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.suppressed).toBe(false);
+        expect(body.data.entry).toBeNull();
+    });
+
+    it("GET /suppression/check returns suppressed=true when found", {
+        timeout: 5000,
+    }, async () => {
+        const store = makeStore();
+        await store.add({
+            tenantId: "t",
+            channel: "email",
+            channelValue: "a@b.c",
+            reason: "manual",
+        });
+        const app = makeApp(store);
+        const res = await app.request(
+            "/suppression/check?channel=email&channelValue=a@b.c"
+        );
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.suppressed).toBe(true);
+        expect(body.data.entry.reason).toBe("manual");
+    });
+
+    it("GET /suppression/check rejects missing query params", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request("/suppression/check");
+        expect(res.status).toBe(400);
+    });
+
+    it("DELETE /suppression/:id returns 204 on hit", {
+        timeout: 5000,
+    }, async () => {
+        const store = makeStore();
+        const entry = await store.add({
+            tenantId: "t",
+            channel: "email",
+            channelValue: "a@b.c",
+            reason: "manual",
+        });
+        const app = makeApp(store);
+        const res = await app.request(`/suppression/${entry.id}`, {
+            method: "DELETE",
+        });
+        expect(res.status).toBe(204);
+    });
+
+    it("DELETE /suppression/:id returns 404 missing", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request("/suppression/nope", {
+            method: "DELETE",
+        });
+        expect(res.status).toBe(404);
+    });
+
+    it("returns 500 when store slot is empty", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildListSuppressionRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/suppression");
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("create surfaces SERVICE_NOT_AVAILABLE on empty store", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildCreateSuppressionRoute();
+        app.post(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/suppression", {
+            method: "POST",
+            body: JSON.stringify({ channelValue: "a@b.c", reason: "bounce" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("check surfaces SERVICE_NOT_AVAILABLE on empty store", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildCheckSuppressionRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request(
+            "/suppression/check?channel=email&channelValue=a@b.c"
+        );
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("POST /suppression 400 on malformed JSON body", {
+        timeout: 5000,
+    }, async () => {
+        const app = makeApp(makeStore());
+        const res = await app.request("/suppression", {
+            method: "POST",
+            body: "not-json{",
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("delete surfaces SERVICE_NOT_AVAILABLE on empty store", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildDeleteSuppressionRoute();
+        app.delete(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/suppression/x", { method: "DELETE" });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/routes.ts

@@ -0,0 +1,225 @@
+/**
+ * `/suppression` route builders — list, check, create, delete. The
+ * store is read from `c.get("campaignSuppressionStore")` and the
+ * tenant from `requireTenant`. Duplicate writes surface as
+ * `CAMPAIGNS_API.DUPLICATE_SUPPRESSION` from the store; the route
+ * layer maps that to HTTP 409 via the package error handler.
+ */
+
+import {
+    DELETE,
+    GET,
+    type PluginRouteEntry,
+    POST,
+    successResponse,
+} from "@suaveplan/api-openapi";
+import type { Context } from "hono";
+import z from "zod";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { getCampaignsApiInstruments } from "../../otel/instruments.js";
+import type { CampaignSuppressionEntry } from "../../repositories/suppression/suppression.types.js";
+import { requireTenant } from "../shared/require-tenant.js";
+import { stripUndefined } from "../shared/strip-undefined.js";
+import {
+    CreateSuppressionSchema,
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+    SuppressionIdParamSchema,
+    SuppressionListResponseSchema,
+    SuppressionQuerySchema,
+    SuppressionResponseSchema,
+} from "./schemas.js";
+
+function requireStore(c: Context) {
+    const store = c.get("campaignSuppressionStore");
+    if (store === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaignSuppressionStore slot is empty"
+        );
+    }
+    return store;
+}
+
+function toResponse(entry: CampaignSuppressionEntry): Record<string, unknown> {
+    return {
+        id: entry.id,
+        tenantId: entry.tenantId,
+        channel: entry.channel,
+        channelValue: entry.channelValue,
+        reason: entry.reason,
+        ...(entry.source !== undefined ? { source: entry.source } : {}),
+        ...(entry.metadata !== undefined ? { metadata: entry.metadata } : {}),
+        createdAt: entry.createdAt.toISOString(),
+    };
+}
+
+/** `GET /suppression` — paginated list. */
+export function buildListSuppressionRoute(): PluginRouteEntry {
+    const route = GET("/suppression")
+        .tags("suppression")
+        .summary("List suppression entries")
+        .query(SuppressionQuerySchema)
+        .response(successResponse(SuppressionListResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const store = requireStore(c);
+        const query = SuppressionQuerySchema.parse({
+            channel: c.req.query("channel"),
+            reason: c.req.query("reason"),
+            limit: c.req.query("limit") ?? 50,
+            offset: c.req.query("offset") ?? 0,
+        });
+        const entries = await store.list({
+            tenantId,
+            ...(query.channel !== undefined ? { channel: query.channel } : {}),
+            ...(query.reason !== undefined ? { reason: query.reason } : {}),
+            limit: query.limit,
+            offset: query.offset,
+        });
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "suppression-list",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: {
+                    entries: entries.map(toResponse),
+                    total: entries.length,
+                },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `GET /suppression/check` — point lookup. */
+export function buildCheckSuppressionRoute(): PluginRouteEntry {
+    const route = GET("/suppression/check")
+        .tags("suppression")
+        .summary("Check a single (channel, channelValue) for suppression")
+        .query(SuppressionCheckQuerySchema)
+        .response(successResponse(SuppressionCheckResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const store = requireStore(c);
+        const parsed = SuppressionCheckQuerySchema.safeParse({
+            channel: c.req.query("channel"),
+            channelValue: c.req.query("channelValue"),
+        });
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "suppression-check",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "GET /suppression/check query failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        const entry = await store.check(
+            tenantId,
+            parsed.data.channel,
+            parsed.data.channelValue
+        );
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "suppression-check",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: {
+                    suppressed: entry !== null,
+                    entry: entry === null ? null : toResponse(entry),
+                },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `POST /suppression` — create entry. */
+export function buildCreateSuppressionRoute(): PluginRouteEntry {
+    const route = POST("/suppression")
+        .tags("suppression")
+        .summary("Add a suppression entry")
+        .body(CreateSuppressionSchema)
+        .response(successResponse(SuppressionResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const store = requireStore(c);
+        const raw = (await c.req.json().catch(() => ({}))) as unknown;
+        const parsed = CreateSuppressionSchema.safeParse(raw);
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "suppression-create",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_INPUT,
+                "POST /suppression body failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        const entry = await store.add({
+            tenantId,
+            ...(stripUndefined(parsed.data) as {
+                channel: string;
+                channelValue: string;
+                reason: ReturnType<
+                    typeof CreateSuppressionSchema.parse
+                >["reason"];
+                source?: string;
+                metadata?: Record<string, unknown>;
+            }),
+        });
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "suppression-create",
+            outcome: "success",
+        });
+        return c.json({ success: true as const, data: toResponse(entry) }, 201);
+    }
+    return { route, handler };
+}
+
+/** `DELETE /suppression/:id`. */
+export function buildDeleteSuppressionRoute(): PluginRouteEntry {
+    const route = DELETE("/suppression/:id")
+        .tags("suppression")
+        .summary("Remove a suppression entry")
+        .params(SuppressionIdParamSchema)
+        .response(z.object({ success: z.literal(true) }))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        // Tenant guard still applies (defence in depth — the id is
+        // global but unauthenticated callers should never hit this).
+        requireTenant(c);
+        const store = requireStore(c);
+        const id = c.req.param("id");
+        const removed = await store.remove(id);
+        if (!removed) {
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.SUPPRESSION_NOT_FOUND,
+                `suppression entry ${id} not found`,
+                { context: { statusCode: 404, id } }
+            );
+        }
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "suppression-delete",
+            outcome: "success",
+        });
+        return c.body(null, 204);
+    }
+    return { route, handler };
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/schemas.md

@@ -0,0 +1,87 @@
+# Suppression route schemas
+
+## Purpose
+
+The suppression-route schemas describe the OpenAPI contract for the
+`/suppression` route tree. The package's local
+`CampaignSuppressionStore` interface is multi-channel — keyed on the
+`(tenantId, channel, channelValue)` triple — so the schemas surface
+`channel` (free-string with `"email"` default) and `channelValue`
+rather than the email-only `channelType` shape used by the upstream
+port. This keeps the same routes reusable for SMS, push, and future
+delivery channels without a v2 endpoint family.
+
+The schemas back four endpoints: list (paginated), create (single
+entry, defends against duplicates at the store), delete (by `id`), and
+check (point lookup by `channel + channelValue`). The check endpoint
+is read-only and idempotent, and is intended to be hit on every
+outgoing-message decision in a sender pipeline.
+
+## Features
+
+- `SuppressionReasonSchema` — 5-member enum mirroring
+  `CampaignSuppressionReason`.
+- `CreateSuppressionSchema` — body validator with `channel: "email"`
+  default and optional `source` / `metadata`.
+- `SuppressionQuerySchema` — list filters with coerced pagination.
+- `SuppressionCheckQuerySchema` — required `channel` + `channelValue`.
+- `SuppressionIdParamSchema` — `:id` path param.
+- 3 response schemas: `SuppressionResponseSchema`,
+  `SuppressionListResponseSchema`, `SuppressionCheckResponseSchema`.
+
+## Usage: Basic
+
+```ts
+import { CreateSuppressionSchema } from "@suaveplan/api-plugin-campaigns";
+
+const parsed = CreateSuppressionSchema.parse(await c.req.json());
+await store.add({ tenantId, ...parsed });
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+} from "@suaveplan/api-plugin-campaigns";
+
+const q = SuppressionCheckQuerySchema.parse({
+    channel: c.req.query("channel"),
+    channelValue: c.req.query("channelValue"),
+});
+const entry = await store.check(tenantId, q.channel, q.channelValue);
+return c.json(
+    SuppressionCheckResponseSchema.parse({
+        suppressed: entry !== null,
+        entry,
+    }),
+    200
+);
+```
+
+## API Reference
+
+- `CreateSuppressionSchema`, `SuppressionQuerySchema`,
+  `SuppressionCheckQuerySchema`, `SuppressionIdParamSchema` — input
+  validators.
+- `SuppressionResponseSchema`, `SuppressionListResponseSchema`,
+  `SuppressionCheckResponseSchema` — response shapes.
+- `type CreateSuppressionBody`, `SuppressionQueryInput` — inferred TS
+  types.
+
+## Implementation Notes
+
+The `channel` field defaults to `"email"` rather than enumerating
+known channels because the suppression store is intentionally
+channel-agnostic (a tenant may opt into SMS or push channels without
+schema changes here). The trade-off: the OpenAPI consumer sees a
+free-string rather than a closed enum. The enforcement boundary moves
+to the recipient delivery pipeline, which always knows its channel
+identifier before consulting suppression.
+
+`metadata` is `z.record(z.string(), z.unknown())` so adapters can
+attach provider-specific context (bounce subcodes, complaint headers,
+…) without a schema migration. The schema is **strict-on-input** only
+for fields it owns; per-channel extensions live inside `metadata` and
+are validated at the integration boundary, not here.

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/schemas.test.ts

@@ -0,0 +1,137 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    CreateSuppressionSchema,
+    SuppressionCheckQuerySchema,
+    SuppressionCheckResponseSchema,
+    SuppressionIdParamSchema,
+    SuppressionListResponseSchema,
+    SuppressionQuerySchema,
+    SuppressionReasonSchema,
+    SuppressionResponseSchema,
+} from "./schemas.js";
+
+describe("suppression route schemas", () => {
+    it("SuppressionReasonSchema accepts all 5 reasons", {
+        timeout: 5000,
+    }, () => {
+        for (const r of [
+            "unsubscribe",
+            "bounce",
+            "complaint",
+            "manual",
+            "compliance",
+        ] as const) {
+            expect(SuppressionReasonSchema.parse(r)).toBe(r);
+        }
+        expect(() => SuppressionReasonSchema.parse("bogus")).toThrow();
+    });
+
+    it("CreateSuppressionSchema applies channel default", {
+        timeout: 5000,
+    }, () => {
+        const out = CreateSuppressionSchema.parse({
+            channelValue: "a@b.c",
+            reason: "bounce",
+        });
+        expect(out.channel).toBe("email");
+        expect(out.reason).toBe("bounce");
+    });
+
+    it("CreateSuppressionSchema accepts source and metadata", {
+        timeout: 5000,
+    }, () => {
+        const out = CreateSuppressionSchema.parse({
+            channel: "sms",
+            channelValue: "+1",
+            reason: "compliance",
+            source: "import",
+            metadata: { x: 1 },
+        });
+        expect(out.source).toBe("import");
+        expect(out.metadata).toEqual({ x: 1 });
+    });
+
+    it("CreateSuppressionSchema rejects empty channelValue", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            CreateSuppressionSchema.parse({
+                channelValue: "",
+                reason: "bounce",
+            })
+        ).toThrow();
+    });
+
+    it("SuppressionQuerySchema coerces numeric fields with defaults", {
+        timeout: 5000,
+    }, () => {
+        const out = SuppressionQuerySchema.parse({ limit: "20" });
+        expect(out.limit).toBe(20);
+        expect(out.offset).toBe(0);
+    });
+
+    it("SuppressionQuerySchema rejects oversized limit", {
+        timeout: 5000,
+    }, () => {
+        expect(() => SuppressionQuerySchema.parse({ limit: 1000 })).toThrow();
+    });
+
+    it("SuppressionCheckQuerySchema requires channel + channelValue", {
+        timeout: 5000,
+    }, () => {
+        expect(
+            SuppressionCheckQuerySchema.parse({
+                channel: "email",
+                channelValue: "a@b.c",
+            })
+        ).toEqual({ channel: "email", channelValue: "a@b.c" });
+        expect(() =>
+            SuppressionCheckQuerySchema.parse({
+                channel: "email",
+                channelValue: "",
+            })
+        ).toThrow();
+    });
+
+    it("SuppressionIdParamSchema requires non-empty id", {
+        timeout: 5000,
+    }, () => {
+        expect(() => SuppressionIdParamSchema.parse({ id: "" })).toThrow();
+    });
+
+    it("SuppressionResponseSchema accepts a minimal entry", {
+        timeout: 5000,
+    }, () => {
+        const ok = SuppressionResponseSchema.safeParse({
+            id: "s1",
+            tenantId: "t1",
+            channel: "email",
+            channelValue: "a@b.c",
+            reason: "manual",
+            createdAt: new Date().toISOString(),
+        });
+        expect(ok.success).toBe(true);
+    });
+
+    it("SuppressionListResponseSchema wraps the entry array", {
+        timeout: 5000,
+    }, () => {
+        expect(
+            SuppressionListResponseSchema.safeParse({
+                entries: [],
+                total: 0,
+            }).success
+        ).toBe(true);
+    });
+
+    it("SuppressionCheckResponseSchema accepts null entry", {
+        timeout: 5000,
+    }, () => {
+        expect(
+            SuppressionCheckResponseSchema.safeParse({
+                suppressed: false,
+                entry: null,
+            }).success
+        ).toBe(true);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/suppression/schemas.ts

@@ -0,0 +1,73 @@
+/**
+ * Zod schemas for the `/suppression` route tree. The suppression-store
+ * interface is multi-channel (the `(tenantId, channel, channelValue)`
+ * triple is the natural primary key), so the schemas surface
+ * `channel` and `channelValue` rather than the email-only
+ * `channelType` + `channelValue` shape from upstream.
+ */
+
+import z from "zod";
+
+/** Mirror of `CampaignSuppressionReason` from the store types. */
+export const SuppressionReasonSchema = z.enum([
+    "unsubscribe",
+    "bounce",
+    "complaint",
+    "manual",
+    "compliance",
+]);
+
+/** Body for `POST /suppression`. */
+export const CreateSuppressionSchema = z.object({
+    channel: z.string().min(1).default("email"),
+    channelValue: z.string().min(1),
+    reason: SuppressionReasonSchema,
+    source: z.string().optional(),
+    metadata: z.record(z.string(), z.unknown()).optional(),
+});
+
+/** Query string for `GET /suppression`. */
+export const SuppressionQuerySchema = z.object({
+    channel: z.string().min(1).optional(),
+    reason: SuppressionReasonSchema.optional(),
+    limit: z.coerce.number().int().min(1).max(200).default(50),
+    offset: z.coerce.number().int().min(0).default(0),
+});
+
+/** Query string for `GET /suppression/check`. */
+export const SuppressionCheckQuerySchema = z.object({
+    channel: z.string().min(1),
+    channelValue: z.string().min(1),
+});
+
+/** Path param `:id`. */
+export const SuppressionIdParamSchema = z.object({
+    id: z.string().min(1),
+});
+
+/** Response shape for a single suppression entry. */
+export const SuppressionResponseSchema = z.object({
+    id: z.string(),
+    tenantId: z.string(),
+    channel: z.string(),
+    channelValue: z.string(),
+    reason: SuppressionReasonSchema,
+    source: z.string().optional(),
+    metadata: z.record(z.string(), z.unknown()).optional(),
+    createdAt: z.string(),
+});
+
+/** Response shape for `GET /suppression`. */
+export const SuppressionListResponseSchema = z.object({
+    entries: z.array(SuppressionResponseSchema),
+    total: z.number(),
+});
+
+/** Response shape for `GET /suppression/check`. */
+export const SuppressionCheckResponseSchema = z.object({
+    suppressed: z.boolean(),
+    entry: SuppressionResponseSchema.nullable(),
+});
+
+export type CreateSuppressionBody = z.infer<typeof CreateSuppressionSchema>;
+export type SuppressionQueryInput = z.infer<typeof SuppressionQuerySchema>;

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/build-routes.md

@@ -0,0 +1,63 @@
+# `build-routes` (webhooks)
+
+## Purpose
+
+`buildWebhookRoutes` aggregates the two `/webhooks/*` route entries in
+canonical order — delivery ingest first, then one-click unsubscribe.
+Co-locating both endpoints in a single bundle keeps the OpenAPI spec
+deterministic, makes the unit-test surface trivially mountable on a
+bare `Hono` app, and gives the plugin's `onInit` a single hook point
+for the entire webhook tree.
+
+The two endpoints differ markedly in shape (POST body vs. GET token
+param) but share the same tenant-guard and store-resolution
+pattern, so the aggregator is the right seam for any future
+cross-cutting middleware (rate limit, HMAC verifier, replay-detector).
+
+## Features
+
+- 2 entries in canonical order: `delivery`, `unsubscribe`.
+- Returned array is `readonly` and ordering is stable across calls.
+- Pure — no I/O, no captured state.
+
+## Usage: Basic
+
+```ts
+import { buildWebhookRoutes } from "@suaveplan/api-plugin-campaigns";
+
+for (const e of buildWebhookRoutes()) {
+    app[e.route.method as "get" | "post"](e.route.path, (c) =>
+        e.handler(c)
+    );
+}
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildWebhookRoutes,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+const entries = buildWebhookRoutes().map((e) => ({
+    ...e,
+    route: { ...e.route, path: `/v1${e.route.path}` },
+}));
+definePluginRoutes(entries, { app, registry, pluginName: "campaigns" });
+```
+
+## API Reference
+
+- `buildWebhookRoutes(): readonly PluginRouteEntry[]` — the two
+  canonical webhook entries.
+
+## Implementation Notes
+
+The delivery endpoint comes first because that is the high-volume
+ingestion path, while the unsubscribe endpoint is rate-limited by the
+human throughput of clicking a link. Keeping them in this order makes
+the OpenAPI consumer's first impression align with the operational
+weight of each endpoint. The aggregator does not try to share any
+middleware between the two builders — each one is self-contained and
+already enforces its own tenant + service-resolution guards.

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/build-routes.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { buildWebhookRoutes } from "./build-routes.js";
+
+describe("buildWebhookRoutes", () => {
+    it("returns 2 entries in canonical order", { timeout: 5000 }, () => {
+        const entries = buildWebhookRoutes();
+        expect(entries.map((e) => `${e.route.method} ${e.route.path}`)).toEqual(
+            ["post /webhooks/delivery", "get /webhooks/unsubscribe/:token"]
+        );
+    });
+
+    it("every entry tagged 'webhooks'", { timeout: 5000 }, () => {
+        for (const e of buildWebhookRoutes()) {
+            expect(e.route.tags).toEqual(["webhooks"]);
+        }
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/build-routes.ts

@@ -0,0 +1,12 @@
+/**
+ * Aggregator returning every `/webhooks/*` `PluginRouteEntry` in
+ * canonical order: delivery ingest, then one-click unsubscribe.
+ */
+
+import type { PluginRouteEntry } from "@suaveplan/api-openapi";
+import { buildDeliveryWebhookRoute, buildUnsubscribeRoute } from "./routes.js";
+
+/** Returns the 2 `/webhooks/*` plugin-route entries. */
+export function buildWebhookRoutes(): readonly PluginRouteEntry[] {
+    return [buildDeliveryWebhookRoute(), buildUnsubscribeRoute()];
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/index.ts

@@ -0,0 +1,15 @@
+export { buildWebhookRoutes } from "./build-routes.js";
+export {
+    buildDeliveryWebhookRoute,
+    buildUnsubscribeRoute,
+} from "./routes.js";
+export {
+    DeliveryEventTypeSchema,
+    type DeliveryWebhookBody,
+    DeliveryWebhookResponseSchema,
+    DeliveryWebhookSchema,
+    decodeUnsubscribeToken,
+    UnsubscribeResponseSchema,
+    UnsubscribeTokenParamSchema,
+    type UnsubscribeTokenPayload,
+} from "./schemas.js";

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/routes.md

@@ -0,0 +1,81 @@
+# Webhook routes
+
+## Purpose
+
+The webhook-route module owns the two webhook endpoints: a delivery
+event ingestion endpoint that normalises and persists provider events
+through `DeliveryEventStore`, and a one-click unsubscribe endpoint
+driven by a base64-JSON token. The delivery handler is the authoritative
+fan-out point: it persists the event and — for the three "negative"
+events (`unsubscribed`, `bounced`, `complained`) — additionally
+inserts a `CampaignSuppressionEntry` so the sender pipeline can
+short-circuit future deliveries to the same contact.
+
+The unsubscribe endpoint hardcodes `channel: "email"` because the
+token format does not carry a channel field (the design assumes
+unsubscribe links are always embedded in email messages). Multi-channel
+unsubscribe is a future extension — when that ships, the token shape
+will gain a `channel` field and the handler will decode it.
+
+## Features
+
+- 2 builders: `buildDeliveryWebhookRoute`, `buildUnsubscribeRoute`.
+- Delivery handler fan-out: records the event, then optionally adds
+  a suppression entry for `unsubscribed` / `bounced` / `complained`.
+- Idempotent suppression: a duplicate `add` is short-circuited by a
+  pre-existing `check` hit, so retries from the provider do not raise
+  `DUPLICATE_SUPPRESSION`.
+- Strict tenant guard: every handler enforces `requireTenant` so
+  provider webhooks must traverse a tenant-aware auth layer before
+  hitting the handler.
+- Token decode failures map to `INVALID_UNSUBSCRIBE_TOKEN` (HTTP 400);
+  schema failures on the delivery body map to `WEBHOOK_REJECTED`.
+
+## Usage: Basic
+
+```ts
+import {
+    buildDeliveryWebhookRoute,
+    buildUnsubscribeRoute,
+} from "@suaveplan/api-plugin-campaigns";
+
+app.post(buildDeliveryWebhookRoute().route.path, (c) =>
+    buildDeliveryWebhookRoute().handler(c)
+);
+app.get(buildUnsubscribeRoute().route.path, (c) =>
+    buildUnsubscribeRoute().handler(c)
+);
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    buildDeliveryWebhookRoute,
+    buildUnsubscribeRoute,
+    definePluginRoutes,
+} from "@suaveplan/api-plugin-campaigns";
+
+definePluginRoutes(
+    [buildDeliveryWebhookRoute(), buildUnsubscribeRoute()],
+    { app, registry, pluginName: "campaigns" }
+);
+```
+
+## API Reference
+
+- `buildDeliveryWebhookRoute(): PluginRouteEntry`
+- `buildUnsubscribeRoute(): PluginRouteEntry`
+
+## Implementation Notes
+
+The negative-event mapping (`unsubscribed → unsubscribe`,
+`bounced → bounce`, `complained → complaint`) is exhaustive but
+intentionally narrow — we do not auto-suppress on `dropped` or
+`deferred` because those are transient provider states that should
+trigger investigation rather than permanent suppression. A future
+change can expand the mapping if operators request a `dropped → manual`
+auto-suppression policy. The handler returns `{ eventId, suppressed }`
+so the calling provider can correlate retries against a stable id and
+operators can confirm via response inspection whether the fan-out
+fired.

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/routes.test.ts

@@ -0,0 +1,324 @@
+import { InMemoryDeliveryEventStore } from "@suaveplan/delivery-tracking";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { Hono } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { InMemoryCampaignSuppressionStore } from "../../repositories/suppression/suppression-memory.js";
+import { buildDeliveryWebhookRoute, buildUnsubscribeRoute } from "./routes.js";
+import "../../context/context.js";
+
+function makeFixtures(principal: object | null = { id: "u", tenantId: "t" }) {
+    let nextId = 0;
+    const store = new InMemoryCampaignSuppressionStore({
+        clock: () => 1_700_000_000_000,
+        idGenerator: () => `s${++nextId}`,
+    });
+    const eventStore = new InMemoryDeliveryEventStore();
+    const app = new Hono();
+    app.use("*", async (c, next) => {
+        if (principal !== null) c.set("user", principal as never);
+        c.set("campaignSuppressionStore", store);
+        c.set("deliveryEventStore", eventStore);
+        c.set("eventBus", { emit: () => undefined } as never);
+        await next();
+    });
+    app.onError((err, c) => {
+        if (err instanceof CampaignsApiError) {
+            const status = ((err.context as { statusCode?: number } | undefined)
+                ?.statusCode ?? 500) as 400 | 401 | 500;
+            return c.json({ code: err.code, error: err.message }, status);
+        }
+        return c.json({ error: String(err) }, 500);
+    });
+    for (const e of [buildDeliveryWebhookRoute(), buildUnsubscribeRoute()]) {
+        const method = e.route.method as "get" | "post";
+        app[method](e.route.path, (c) => e.handler(c as never));
+    }
+    return { app, store, eventStore };
+}
+
+describe("webhook delivery route", () => {
+    it("records a delivered event without suppression", {
+        timeout: 5000,
+    }, async () => {
+        const { app, store, eventStore } = makeFixtures();
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "delivered",
+                contactId: "u1",
+                campaignId: "cmp1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.suppressed).toBe(false);
+        expect(await eventStore.getByCampaign("cmp1")).toHaveLength(1);
+        expect(await store.count("t")).toBe(0);
+    });
+
+    it("suppresses on unsubscribed event", { timeout: 5000 }, async () => {
+        const { app, store } = makeFixtures();
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "unsubscribed",
+                contactId: "u1",
+                campaignId: "cmp1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.suppressed).toBe(true);
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("suppresses on bounced event", { timeout: 5000 }, async () => {
+        const { app, store } = makeFixtures();
+        await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "bounced",
+                contactId: "u1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("suppresses on complained event", { timeout: 5000 }, async () => {
+        const { app, store } = makeFixtures();
+        await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "complained",
+                contactId: "u1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("is idempotent — second unsubscribe does not raise", {
+        timeout: 5000,
+    }, async () => {
+        const { app, store } = makeFixtures();
+        for (let i = 0; i < 2; i++) {
+            const res = await app.request("/webhooks/delivery", {
+                method: "POST",
+                body: JSON.stringify({
+                    messageId: `m${i}`,
+                    eventType: "unsubscribed",
+                    contactId: "u1",
+                }),
+                headers: { "content-type": "application/json" },
+            });
+            expect(res.status).toBe(200);
+            expect((await res.json()).data.suppressed).toBe(true);
+        }
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("accepts a timestamp from the payload", {
+        timeout: 5000,
+    }, async () => {
+        const { app, eventStore } = makeFixtures();
+        await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "delivered",
+                contactId: "u1",
+                campaignId: "cmp1",
+                timestamp: "2026-01-01T00:00:00Z",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        const events = await eventStore.getByCampaign("cmp1");
+        expect(events[0]?.timestamp.toISOString()).toBe(
+            "2026-01-01T00:00:00.000Z"
+        );
+    });
+
+    it("rejects malformed body with WEBHOOK_REJECTED", {
+        timeout: 5000,
+    }, async () => {
+        const { app } = makeFixtures();
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({ messageId: "", eventType: "delivered" }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.WEBHOOK_REJECTED
+        );
+    });
+
+    it("401 without a principal", { timeout: 5000 }, async () => {
+        const { app } = makeFixtures(null);
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m1",
+                eventType: "delivered",
+                contactId: "u1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(401);
+    });
+
+    it("POST /webhooks/delivery 400 on malformed JSON body", {
+        timeout: 5000,
+    }, async () => {
+        const { app } = makeFixtures();
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: "not-json{",
+            headers: { "content-type": "application/json" },
+        });
+        expect(res.status).toBe(400);
+    });
+
+    it("500 when event store slot empty", { timeout: 5000 }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildDeliveryWebhookRoute();
+        app.post(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m",
+                eventType: "delivered",
+                contactId: "u1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+
+    it("500 when suppression store slot empty", {
+        timeout: 5000,
+    }, async () => {
+        const eventStore = new InMemoryDeliveryEventStore();
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            c.set("deliveryEventStore", eventStore);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildDeliveryWebhookRoute();
+        app.post(e.route.path, (c) => e.handler(c as never));
+        const res = await app.request("/webhooks/delivery", {
+            method: "POST",
+            body: JSON.stringify({
+                messageId: "m",
+                eventType: "delivered",
+                contactId: "u1",
+            }),
+            headers: { "content-type": "application/json" },
+        });
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+});
+
+describe("webhook unsubscribe route", () => {
+    it("accepts a valid token", { timeout: 5000 }, async () => {
+        const { app, store } = makeFixtures();
+        const token = btoa(JSON.stringify({ contactId: "u1" }));
+        const res = await app.request(`/webhooks/unsubscribe/${token}`);
+        expect(res.status).toBe(200);
+        const body = await res.json();
+        expect(body.data.contactId).toBe("u1");
+        expect(body.data.campaignId).toBeNull();
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("includes campaignId metadata when supplied", {
+        timeout: 5000,
+    }, async () => {
+        const { app, store } = makeFixtures();
+        const token = btoa(
+            JSON.stringify({ contactId: "u1", campaignId: "cmp1" })
+        );
+        const res = await app.request(`/webhooks/unsubscribe/${token}`);
+        expect(res.status).toBe(200);
+        const entries = await store.list({ tenantId: "t" });
+        expect(entries[0]?.metadata).toEqual({ campaignId: "cmp1" });
+    });
+
+    it("is idempotent — repeat call does not double-insert", {
+        timeout: 5000,
+    }, async () => {
+        const { app, store } = makeFixtures();
+        const token = btoa(JSON.stringify({ contactId: "u1" }));
+        await app.request(`/webhooks/unsubscribe/${token}`);
+        await app.request(`/webhooks/unsubscribe/${token}`);
+        expect(await store.count("t")).toBe(1);
+    });
+
+    it("rejects an undecodable token", { timeout: 5000 }, async () => {
+        const { app } = makeFixtures();
+        const res = await app.request("/webhooks/unsubscribe/ÿÿÿÿ");
+        expect(res.status).toBe(400);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.INVALID_UNSUBSCRIBE_TOKEN
+        );
+    });
+
+    it("rejects a token without contactId", { timeout: 5000 }, async () => {
+        const { app } = makeFixtures();
+        const token = btoa(JSON.stringify({ campaignId: "cmp1" }));
+        const res = await app.request(`/webhooks/unsubscribe/${token}`);
+        expect(res.status).toBe(400);
+    });
+
+    it("401 without a principal", { timeout: 5000 }, async () => {
+        const { app } = makeFixtures(null);
+        const token = btoa(JSON.stringify({ contactId: "u1" }));
+        const res = await app.request(`/webhooks/unsubscribe/${token}`);
+        expect(res.status).toBe(401);
+    });
+
+    it("500 when suppression store slot empty", {
+        timeout: 5000,
+    }, async () => {
+        const app = new Hono();
+        app.use("*", async (c, next) => {
+            c.set("user", { id: "u", tenantId: "t" } as never);
+            await next();
+        });
+        app.onError((err, c) =>
+            c.json({ code: (err as CampaignsApiError).code }, 500)
+        );
+        const e = buildUnsubscribeRoute();
+        app.get(e.route.path, (c) => e.handler(c as never));
+        const token = btoa(JSON.stringify({ contactId: "u1" }));
+        const res = await app.request(`/webhooks/unsubscribe/${token}`);
+        expect((await res.json()).code).toBe(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE
+        );
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/routes.ts

@@ -0,0 +1,226 @@
+/**
+ * `/webhooks` route builders — provider delivery-event ingest and
+ * one-click unsubscribe.
+ *
+ * The delivery webhook normalises the payload, persists it via
+ * `deliveryEventStore.record`, and on the three "negative" event
+ * types (`unsubscribed`, `bounced`, `complained`) it additionally
+ * inserts a matching `CampaignSuppressionEntry` so the sender
+ * pipeline can short-circuit future deliveries. Both store writes
+ * use `add({ ... })`; the store deduplicates by `(tenant, channel,
+ * channelValue)` so retries are safe.
+ */
+
+import {
+    GET,
+    type PluginRouteEntry,
+    POST,
+    successResponse,
+} from "@suaveplan/api-openapi";
+import type { DeliveryEvent } from "@suaveplan/delivery-tracking";
+import type { Context } from "hono";
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+} from "../../error-codes/error-codes.js";
+import { getCampaignsApiInstruments } from "../../otel/instruments.js";
+import type {
+    CampaignSuppressionReason,
+    CampaignSuppressionStore,
+} from "../../repositories/suppression/suppression.types.js";
+import { requireTenant } from "../shared/require-tenant.js";
+import {
+    DeliveryWebhookResponseSchema,
+    DeliveryWebhookSchema,
+    decodeUnsubscribeToken,
+    UnsubscribeResponseSchema,
+    UnsubscribeTokenParamSchema,
+} from "./schemas.js";
+
+const SUPPRESSION_REASON_BY_EVENT: Record<
+    "unsubscribed" | "bounced" | "complained",
+    CampaignSuppressionReason
+> = {
+    unsubscribed: "unsubscribe",
+    bounced: "bounce",
+    complained: "complaint",
+};
+
+function requireEventStore(c: Context) {
+    const store = c.get("deliveryEventStore");
+    if (store === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "deliveryEventStore slot is empty"
+        );
+    }
+    return store;
+}
+
+function requireSuppressionStore(c: Context): CampaignSuppressionStore {
+    const store = c.get("campaignSuppressionStore");
+    if (store === undefined) {
+        throw new CampaignsApiError(
+            CAMPAIGNS_API_CODES.SERVICE_NOT_AVAILABLE,
+            "campaignSuppressionStore slot is empty"
+        );
+    }
+    return store;
+}
+
+async function maybeSuppress(
+    store: CampaignSuppressionStore,
+    tenantId: string,
+    body: {
+        eventType: string;
+        channel: string;
+        contactId: string;
+        campaignId?: string;
+    }
+): Promise<boolean> {
+    const reason =
+        SUPPRESSION_REASON_BY_EVENT[
+            body.eventType as keyof typeof SUPPRESSION_REASON_BY_EVENT
+        ];
+    if (reason === undefined) return false;
+    const existing = await store.check(tenantId, body.channel, body.contactId);
+    if (existing !== null) return true;
+    await store.add({
+        tenantId,
+        channel: body.channel,
+        channelValue: body.contactId,
+        reason,
+        source: "webhook",
+        ...(body.campaignId !== undefined
+            ? { metadata: { campaignId: body.campaignId } }
+            : {}),
+    });
+    return true;
+}
+
+/** `POST /webhooks/delivery` — ingest a normalised provider delivery event. */
+export function buildDeliveryWebhookRoute(): PluginRouteEntry {
+    const route = POST("/webhooks/delivery")
+        .tags("webhooks")
+        .summary("Receive a delivery webhook event")
+        .body(DeliveryWebhookSchema)
+        .response(DeliveryWebhookResponseSchema)
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const eventStore = requireEventStore(c);
+        const suppressionStore = requireSuppressionStore(c);
+        const raw = (await c.req.json().catch(() => ({}))) as unknown;
+        const parsed = DeliveryWebhookSchema.safeParse(raw);
+        if (!parsed.success) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "webhook-delivery",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.WEBHOOK_REJECTED,
+                "POST /webhooks/delivery body failed validation",
+                { cause: parsed.error, context: { statusCode: 400 } }
+            );
+        }
+        const body = parsed.data;
+        const event: DeliveryEvent = {
+            id: crypto.randomUUID(),
+            tenantId,
+            ...(body.campaignId !== undefined
+                ? { campaignId: body.campaignId }
+                : {}),
+            contactId: body.contactId,
+            channel: body.channel,
+            eventType: body.eventType,
+            messageId: body.messageId,
+            metadata: body.metadata,
+            timestamp:
+                body.timestamp !== undefined
+                    ? new Date(body.timestamp)
+                    : new Date(),
+        };
+        await eventStore.record(event);
+        const suppressed = await maybeSuppress(suppressionStore, tenantId, {
+            eventType: body.eventType,
+            channel: body.channel,
+            contactId: body.contactId,
+            ...(body.campaignId !== undefined
+                ? { campaignId: body.campaignId }
+                : {}),
+        });
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "webhook-delivery",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: { eventId: event.id, suppressed },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}
+
+/** `GET /webhooks/unsubscribe/:token` — one-click unsubscribe. */
+export function buildUnsubscribeRoute(): PluginRouteEntry {
+    const route = GET("/webhooks/unsubscribe/:token")
+        .tags("webhooks")
+        .summary("One-click unsubscribe via a base64-JSON token")
+        .params(UnsubscribeTokenParamSchema)
+        .response(successResponse(UnsubscribeResponseSchema))
+        .build();
+    async function handler(c: Context): Promise<Response> {
+        const { tenantId } = requireTenant(c);
+        const suppressionStore = requireSuppressionStore(c);
+        const token = c.req.param("token");
+        let payload: ReturnType<typeof decodeUnsubscribeToken>;
+        try {
+            payload = decodeUnsubscribeToken(token);
+        } catch (cause) {
+            getCampaignsApiInstruments().requestsTotal.add(1, {
+                route: "webhook-unsubscribe",
+                outcome: "error",
+            });
+            throw new CampaignsApiError(
+                CAMPAIGNS_API_CODES.INVALID_UNSUBSCRIBE_TOKEN,
+                "unsubscribe token decode failed",
+                { cause, context: { statusCode: 400 } }
+            );
+        }
+        const existing = await suppressionStore.check(
+            tenantId,
+            "email",
+            payload.contactId
+        );
+        if (existing === null) {
+            await suppressionStore.add({
+                tenantId,
+                channel: "email",
+                channelValue: payload.contactId,
+                reason: "unsubscribe",
+                source: "one-click",
+                ...(payload.campaignId !== undefined
+                    ? { metadata: { campaignId: payload.campaignId } }
+                    : {}),
+            });
+        }
+        getCampaignsApiInstruments().requestsTotal.add(1, {
+            route: "webhook-unsubscribe",
+            outcome: "success",
+        });
+        return c.json(
+            {
+                success: true as const,
+                data: {
+                    contactId: payload.contactId,
+                    campaignId: payload.campaignId ?? null,
+                },
+            },
+            200
+        );
+    }
+    return { route, handler };
+}

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/schemas.md

@@ -0,0 +1,86 @@
+# Webhook route schemas
+
+## Purpose
+
+The webhook-route schemas describe the OpenAPI contract for the
+`/webhooks` route tree, plus a `decodeUnsubscribeToken` helper. The
+delivery webhook accepts a normalised `DeliveryEvent` payload (the
+provider-specific parser lives in `@suaveplan/delivery-tracking`'s
+`WebhookEventParser`; this plugin only handles already-normalised
+events). The unsubscribe endpoint decodes a base64-JSON token carrying
+`{ contactId, campaignId? }` and falls through to the suppression
+store.
+
+The token format is deliberately lightweight — base64-encoded JSON
+with no signature. Production deployments SHOULD wrap this endpoint in
+a per-tenant HMAC verification layer (e.g. via the rate-limit or
+auth-plugin middleware chain) before the token decode happens. This
+module is the parsing primitive; identity verification is layered on
+above.
+
+## Features
+
+- `DeliveryEventTypeSchema` — 10-member enum.
+- `DeliveryWebhookSchema` — body validator with `channel: "email"`
+  default and ISO 8601 timestamp.
+- `UnsubscribeTokenParamSchema` — `:token` path validator.
+- `DeliveryWebhookResponseSchema`, `UnsubscribeResponseSchema` —
+  response shapes.
+- `decodeUnsubscribeToken(token)` — base64 → JSON → Zod-validated
+  payload, with three distinct error messages so the route handler
+  can map all to `INVALID_UNSUBSCRIBE_TOKEN`.
+
+## Usage: Basic
+
+```ts
+import { DeliveryWebhookSchema } from "@suaveplan/api-plugin-campaigns";
+
+const event = DeliveryWebhookSchema.parse(await c.req.json());
+await store.record({ ...event, tenantId, id: crypto.randomUUID() });
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    CAMPAIGNS_API_CODES,
+    CampaignsApiError,
+    decodeUnsubscribeToken,
+} from "@suaveplan/api-plugin-campaigns";
+
+let payload;
+try {
+    payload = decodeUnsubscribeToken(c.req.param("token"));
+} catch (cause) {
+    throw new CampaignsApiError(
+        CAMPAIGNS_API_CODES.INVALID_UNSUBSCRIBE_TOKEN,
+        "could not decode unsubscribe token",
+        { cause, context: { statusCode: 400 } }
+    );
+}
+```
+
+## API Reference
+
+- `DeliveryEventTypeSchema: ZodEnum<10>`
+- `DeliveryWebhookSchema: ZodObject<...>`
+- `UnsubscribeTokenParamSchema: ZodObject<{ token: ZodString }>`
+- `DeliveryWebhookResponseSchema`, `UnsubscribeResponseSchema` —
+  response shapes.
+- `decodeUnsubscribeToken(token: string): UnsubscribeTokenPayload` —
+  throws `Error` on any failure mode.
+- `type DeliveryWebhookBody`, `type UnsubscribeTokenPayload`.
+
+## Implementation Notes
+
+`decodeUnsubscribeToken` throws plain `Error` (not
+`CampaignsApiError`) because the helper is consumed from a single
+route-handler site that wraps every throw in
+`CampaignsApiError(INVALID_UNSUBSCRIBE_TOKEN)`. Centralising the wrap
+at the call site keeps the helper portable for future consumers that
+may wish to map the failure mode differently (e.g. a CLI tool issuing
+test tokens). The three distinct error messages — base64,
+JSON, contactId — are preserved so server-side logs can distinguish
+between a tampered token (likely malicious), a malformed token (likely
+truncated by a mail-client URL-shortener), and a structurally-valid
+but content-invalid token (likely a tenant-config bug).

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/schemas.test.ts

@@ -0,0 +1,103 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    DeliveryEventTypeSchema,
+    DeliveryWebhookSchema,
+    decodeUnsubscribeToken,
+    UnsubscribeTokenParamSchema,
+} from "./schemas.js";
+
+describe("webhook schemas", () => {
+    it("DeliveryEventTypeSchema accepts the 10 event types", {
+        timeout: 5000,
+    }, () => {
+        for (const t of [
+            "sent",
+            "delivered",
+            "opened",
+            "clicked",
+            "bounced",
+            "unsubscribed",
+            "complained",
+            "deferred",
+            "dropped",
+            "read",
+        ] as const) {
+            expect(DeliveryEventTypeSchema.parse(t)).toBe(t);
+        }
+        expect(() => DeliveryEventTypeSchema.parse("bogus")).toThrow();
+    });
+
+    it("DeliveryWebhookSchema applies channel + metadata defaults", {
+        timeout: 5000,
+    }, () => {
+        const out = DeliveryWebhookSchema.parse({
+            messageId: "m1",
+            eventType: "delivered",
+            contactId: "c1",
+        });
+        expect(out.channel).toBe("email");
+        expect(out.metadata).toEqual({});
+    });
+
+    it("DeliveryWebhookSchema rejects empty messageId", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            DeliveryWebhookSchema.parse({
+                messageId: "",
+                eventType: "delivered",
+                contactId: "c1",
+            })
+        ).toThrow();
+    });
+
+    it("DeliveryWebhookSchema accepts an ISO timestamp", {
+        timeout: 5000,
+    }, () => {
+        const out = DeliveryWebhookSchema.parse({
+            messageId: "m1",
+            eventType: "opened",
+            contactId: "c1",
+            timestamp: "2026-01-01T00:00:00Z",
+        });
+        expect(out.timestamp).toBe("2026-01-01T00:00:00Z");
+    });
+
+    it("UnsubscribeTokenParamSchema requires a non-empty token", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            UnsubscribeTokenParamSchema.parse({ token: "" })
+        ).toThrow();
+    });
+});
+
+describe("decodeUnsubscribeToken", () => {
+    it("decodes a valid token", { timeout: 5000 }, () => {
+        const token = btoa(
+            JSON.stringify({ contactId: "c1", campaignId: "cmp1" })
+        );
+        const out = decodeUnsubscribeToken(token);
+        expect(out).toEqual({ contactId: "c1", campaignId: "cmp1" });
+    });
+
+    it("decodes a token without campaignId", { timeout: 5000 }, () => {
+        const token = btoa(JSON.stringify({ contactId: "c1" }));
+        expect(decodeUnsubscribeToken(token)).toEqual({ contactId: "c1" });
+    });
+
+    it("throws when token is not valid base64", { timeout: 5000 }, () => {
+        // 'œ' is outside the base64 alphabet; atob rejects.
+        expect(() => decodeUnsubscribeToken("ÿÿÿÿÿ")).toThrow();
+    });
+
+    it("throws when decoded body is not JSON", { timeout: 5000 }, () => {
+        const token = btoa("not json{");
+        expect(() => decodeUnsubscribeToken(token)).toThrow(/JSON/);
+    });
+
+    it("throws when payload lacks contactId", { timeout: 5000 }, () => {
+        const token = btoa(JSON.stringify({ campaignId: "cmp1" }));
+        expect(() => decodeUnsubscribeToken(token)).toThrow(/contactId/);
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/routes/webhooks/schemas.ts

@@ -0,0 +1,99 @@
+/**
+ * Zod schemas for the `/webhooks` route tree. Webhooks ingest
+ * provider-side delivery events (one shape per provider, normalised to
+ * the genesis `DeliveryEvent` model) and a one-click unsubscribe URL
+ * driven by a base64-encoded JSON token.
+ */
+
+import z from "zod";
+
+/** 10-member event-type enum mirroring `DeliveryEventType`. */
+export const DeliveryEventTypeSchema = z.enum([
+    "sent",
+    "delivered",
+    "opened",
+    "clicked",
+    "bounced",
+    "unsubscribed",
+    "complained",
+    "deferred",
+    "dropped",
+    "read",
+]);
+
+/** Body for `POST /webhooks/delivery`. */
+export const DeliveryWebhookSchema = z.object({
+    messageId: z.string().min(1),
+    eventType: DeliveryEventTypeSchema,
+    contactId: z.string().min(1),
+    campaignId: z.string().min(1).optional(),
+    channel: z.string().min(1).default("email"),
+    metadata: z.record(z.string(), z.unknown()).default({}),
+    timestamp: z.string().datetime().optional(),
+});
+
+/** Path param for `GET /webhooks/unsubscribe/:token`. */
+export const UnsubscribeTokenParamSchema = z.object({
+    token: z.string().min(1),
+});
+
+/** Response shape for `POST /webhooks/delivery`. */
+export const DeliveryWebhookResponseSchema = z.object({
+    success: z.literal(true),
+    data: z.object({
+        eventId: z.string(),
+        suppressed: z.boolean(),
+    }),
+});
+
+/** Response shape for `GET /webhooks/unsubscribe/:token`. */
+export const UnsubscribeResponseSchema = z.object({
+    success: z.literal(true),
+    data: z.object({
+        contactId: z.string(),
+        campaignId: z.string().nullable(),
+    }),
+});
+
+export type DeliveryWebhookBody = z.infer<typeof DeliveryWebhookSchema>;
+export type UnsubscribeTokenPayload = {
+    contactId: string;
+    campaignId?: string;
+};
+
+const UnsubscribeTokenPayloadSchema = z.object({
+    contactId: z.string().min(1),
+    campaignId: z.string().min(1).optional(),
+});
+
+/**
+ * Decode + validate an unsubscribe token. The token is a base64-encoded
+ * JSON object carrying `{ contactId, campaignId? }`. Returns the parsed
+ * payload or throws — callers wrap the throw in
+ * `CAMPAIGNS_API.INVALID_UNSUBSCRIBE_TOKEN`.
+ */
+export function decodeUnsubscribeToken(token: string): UnsubscribeTokenPayload {
+    let decoded: string;
+    try {
+        decoded = atob(token);
+    } catch (cause) {
+        throw new Error("token is not valid base64", { cause });
+    }
+    let parsed: unknown;
+    try {
+        parsed = JSON.parse(decoded);
+    } catch (cause) {
+        throw new Error("token did not decode to JSON", { cause });
+    }
+    const validated = UnsubscribeTokenPayloadSchema.safeParse(parsed);
+    if (!validated.success) {
+        throw new Error("token payload missing contactId");
+    }
+    const payload: UnsubscribeTokenPayload = {
+        contactId: validated.data.contactId,
+    };
+    if (validated.data.campaignId !== undefined) {
+        payload.campaignId = validated.data.campaignId;
+    }
+    return payload;
+}

packages/api-stack/api/api-plugin-campaigns/src/schemas/index.ts

@@ -0,0 +1,5 @@
+export {
+    type CampaignsPluginOptionsInput,
+    type CampaignsPluginOptionsParsed,
+    CampaignsPluginOptionsSchema,
+} from "./options.js";

packages/api-stack/api/api-plugin-campaigns/src/schemas/options.md

@@ -0,0 +1,86 @@
+# `schemas/options`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `schemas/options` module owns the Zod validator that
+`createCampaignsPlugin` runs against its caller-supplied options at
+construction time. The schema doubles as the source of truth for default
+values: each field declares `.default(...)` so a single `parse` call
+produces a fully-resolved `CampaignsPluginConfig` regardless of which
+fields the caller actually passed.
+
+Routing every option through one schema rather than scattering defaults
+across the plugin scaffold and route modules is what lets Chunks B and C
+inherit the validated config shape without redoing the parse. Any
+follow-on chunk that needs a new option adds the field here (with its
+default) and the rest of the package picks it up via type inference.
+
+## Features
+
+- `CampaignsPluginOptionsSchema` — Zod object schema with default-bearing
+  fields for `routePrefix`, `maxCampaignsPerTenant`,
+  `maxRecipientsPerCampaign`, `defaultThrottlePerSecond`, and
+  `applySchemaOnInit`.
+- Optional `logger` slot validated against the structural shape of a
+  `LoggerLike` (four function members).
+- `CampaignsPluginOptionsInput` (input type) and
+  `CampaignsPluginOptionsParsed` (output type) inferred via `z.input` and
+  `z.output` for use at the package boundary.
+
+## Usage: Basic
+
+```ts
+import { CampaignsPluginOptionsSchema } from "@suaveplan/api-plugin-campaigns";
+
+const config = CampaignsPluginOptionsSchema.parse({});
+// config.routePrefix === "/"
+// config.maxCampaignsPerTenant === 10_000
+```
+
+## Usage: Advanced
+
+```ts
+import { CampaignsPluginOptionsSchema } from "@suaveplan/api-plugin-campaigns";
+
+const parsed = CampaignsPluginOptionsSchema.safeParse({
+    routePrefix: "/api/v1",
+    maxCampaignsPerTenant: 50_000,
+    applySchemaOnInit: false,
+});
+if (!parsed.success) {
+    throw parsed.error;
+}
+// `parsed.data` is fully resolved with defaults applied to omitted
+// fields and validations enforced on the supplied fields.
+```
+
+## API Reference
+
+- `CampaignsPluginOptionsSchema: z.ZodObject<...>` — the validator.
+- `CampaignsPluginOptionsInput` — input shape (all fields optional).
+- `CampaignsPluginOptionsParsed` — output shape (all defaults applied).
+- Validation rules:
+  - `routePrefix` — non-empty string starting with `/`.
+  - `maxCampaignsPerTenant` — positive integer.
+  - `maxRecipientsPerCampaign` — positive integer.
+  - `defaultThrottlePerSecond` — positive integer.
+  - `applySchemaOnInit` — boolean.
+  - `logger` — optional structural `LoggerLike`.
+
+## Implementation Notes
+
+The schema applies defaults rather than expecting upstream code to fill
+them. That single-source-of-truth pattern matches the rest of the suaveplan
+plugin family (`@suaveplan/api-plugin-contacts` follows the same shape)
+and means the resolved config carried on the descriptor's `defaults`
+slot is always fully populated.
+
+`z.function()` is the Zod v4 spelling used to validate the four
+`LoggerLike` members. Marking the field optional (rather than supplying
+a default `LoggerLike`) is deliberate — the plugin's `onInit` will fall
+back to `ctx.logger` when the option is omitted, so the schema only
+needs to attest "if you supplied one, it has the right shape".

packages/api-stack/api/api-plugin-campaigns/src/schemas/options.test.ts

@@ -0,0 +1,86 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { CampaignsPluginOptionsSchema } from "./options.js";
+
+describe("CampaignsPluginOptionsSchema", () => {
+    it("applies all defaults when given an empty object", {
+        timeout: 5000,
+    }, () => {
+        const parsed = CampaignsPluginOptionsSchema.parse({});
+        expect(parsed.routePrefix).toBe("/");
+        expect(parsed.maxCampaignsPerTenant).toBe(10_000);
+        expect(parsed.maxRecipientsPerCampaign).toBe(1_000_000);
+        expect(parsed.defaultThrottlePerSecond).toBe(100);
+        expect(parsed.applySchemaOnInit).toBe(true);
+    });
+
+    it("preserves a custom routePrefix", { timeout: 5000 }, () => {
+        const parsed = CampaignsPluginOptionsSchema.parse({
+            routePrefix: "/api/v1",
+        });
+        expect(parsed.routePrefix).toBe("/api/v1");
+    });
+
+    it("rejects routePrefix that does not start with '/'", {
+        timeout: 5000,
+    }, () => {
+        const result = CampaignsPluginOptionsSchema.safeParse({
+            routePrefix: "api",
+        });
+        expect(result.success).toBe(false);
+    });
+
+    it("rejects empty routePrefix", { timeout: 5000 }, () => {
+        const result = CampaignsPluginOptionsSchema.safeParse({
+            routePrefix: "",
+        });
+        expect(result.success).toBe(false);
+    });
+
+    it("rejects non-positive maxCampaignsPerTenant", { timeout: 5000 }, () => {
+        const result = CampaignsPluginOptionsSchema.safeParse({
+            maxCampaignsPerTenant: 0,
+        });
+        expect(result.success).toBe(false);
+    });
+
+    it("rejects non-integer maxRecipientsPerCampaign", {
+        timeout: 5000,
+    }, () => {
+        const result = CampaignsPluginOptionsSchema.safeParse({
+            maxRecipientsPerCampaign: 1.5,
+        });
+        expect(result.success).toBe(false);
+    });
+
+    it("rejects negative defaultThrottlePerSecond", { timeout: 5000 }, () => {
+        const result = CampaignsPluginOptionsSchema.safeParse({
+            defaultThrottlePerSecond: -1,
+        });
+        expect(result.success).toBe(false);
+    });
+
+    it("accepts applySchemaOnInit: false", { timeout: 5000 }, () => {
+        const parsed = CampaignsPluginOptionsSchema.parse({
+            applySchemaOnInit: false,
+        });
+        expect(parsed.applySchemaOnInit).toBe(false);
+    });
+
+    it("accepts a custom logger object", { timeout: 5000 }, () => {
+        const logger = {
+            debug: () => undefined,
+            info: () => undefined,
+            warn: () => undefined,
+            error: () => undefined,
+        };
+        const parsed = CampaignsPluginOptionsSchema.parse({ logger });
+        // Zod's `z.function()` wraps the member functions, so identity
+        // is not preserved — assert the structural shape instead.
+        expect(parsed.logger).toBeDefined();
+        const out = parsed.logger as NonNullable<typeof parsed.logger>;
+        expect(typeof out.debug).toBe("function");
+        expect(typeof out.info).toBe("function");
+        expect(typeof out.warn).toBe("function");
+        expect(typeof out.error).toBe("function");
+    });
+});

packages/api-stack/api/api-plugin-campaigns/src/schemas/options.ts

@@ -0,0 +1,48 @@
+import z from "zod";
+
+/**
+ * Zod schema for `createCampaignsPlugin(options)`. All fields are
+ * optional at the input boundary; defaults are applied at parse time
+ * so downstream code reads a fully-resolved `CampaignsPluginConfig`
+ * regardless of which fields the caller supplied.
+ */
+export const CampaignsPluginOptionsSchema = z.object({
+    routePrefix: z
+        .string()
+        .min(1, "routePrefix must be non-empty")
+        .startsWith("/", "routePrefix must start with '/'")
+        .default("/"),
+    maxCampaignsPerTenant: z
+        .number()
+        .int("maxCampaignsPerTenant must be an integer")
+        .positive("maxCampaignsPerTenant must be > 0")
+        .default(10_000),
+    maxRecipientsPerCampaign: z
+        .number()
+        .int("maxRecipientsPerCampaign must be an integer")
+        .positive("maxRecipientsPerCampaign must be > 0")
+        .default(1_000_000),
+    defaultThrottlePerSecond: z
+        .number()
+        .int("defaultThrottlePerSecond must be an integer")
+        .positive("defaultThrottlePerSecond must be > 0")
+        .default(100),
+    applySchemaOnInit: z.boolean().default(true),
+    logger: z
+        .object({
+            debug: z.function(),
+            info: z.function(),
+            warn: z.function(),
+            error: z.function(),
+        })
+        .optional(),
+});
+
+/** Inferred input shape with all fields optional. */
+export type CampaignsPluginOptionsInput = z.input<
+    typeof CampaignsPluginOptionsSchema
+>;
+/** Inferred output shape with defaults applied. */
+export type CampaignsPluginOptionsParsed = z.output<
+    typeof CampaignsPluginOptionsSchema
+>;

packages/api-stack/api/api-plugin-campaigns/src/services/index.ts

@@ -0,0 +1 @@
+import "./registry-augmentation.js";

packages/api-stack/api/api-plugin-campaigns/src/services/registry-augmentation.md

@@ -0,0 +1,89 @@
+# `services/registry-augmentation`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `services/registry-augmentation` module owns the
+`ServiceRegistry` declaration-merge augmentation applied by
+`@suaveplan/api-plugin-campaigns`. Importing the module for its side
+effects (which the package root barrel does automatically) reserves the
+host-side service slots (`app`, `openAPIRegistry`, `logger`,
+`eventBus`, `clock`) so the plugin's lifecycle hooks can resolve them
+via `ctx.getService(...)` without a cast and without depending on
+which other plugin happens to register the slot first.
+
+The slots declared here are the minimum baseline that Chunk A needs.
+Chunks B and C will extend the same interface with
+`campaignRepository`, `campaignSuppressionStore`, and
+`deliveryEventStore` slots once the repository classes exist; that
+extension lands in a new module so this file stays untouched across
+the chunked migration.
+
+## Features
+
+- Pure declaration-merge — zero runtime cost, zero bundle size.
+- Re-exports an empty value (`export {}`) so the module is a true ESM
+  module and the `declare module` block applies.
+- Type-only imports from `@suaveplan/api-openapi`,
+  `@hono/zod-openapi`, and `@suaveplan/types`.
+
+## Usage: Basic
+
+```ts
+import "@suaveplan/api-plugin-campaigns";
+import type { ServiceRegistry } from "@suaveplan/api-plugin/service-registry";
+
+declare const reg: ServiceRegistry;
+reg.app; // OpenAPIHono
+reg.logger; // LoggerLike
+```
+
+## Usage: Advanced
+
+```ts
+import { createPluginContext } from "@suaveplan/api-plugin";
+import "@suaveplan/api-plugin-campaigns";
+
+const services = new Map<string, unknown>();
+services.set("app", /* OpenAPIHono instance */ undefined);
+services.set("openAPIRegistry", /* OpenAPIRegistry instance */ undefined);
+
+const ctx = createPluginContext({
+    logger: console as never,
+    eventBus: { emit: () => undefined, on: () => () => undefined } as never,
+    signal: new AbortController().signal,
+    config: {} as never,
+    services,
+});
+const app = ctx.getService("app"); // typed as OpenAPIHono | undefined
+```
+
+## API Reference
+
+Adds the following slots to `ServiceRegistry`:
+
+- `app: OpenAPIHono`
+- `openAPIRegistry: OpenAPIRegistry`
+- `logger: LoggerLike`
+- `eventBus: EventBusLike`
+- `clock: Clock`
+
+No runtime exports.
+
+## Implementation Notes
+
+The augmentation declares the slots as required, not optional. That is
+the right shape even for plugins that consume only a subset of slots:
+TypeScript declaration merging unions slots from every importer, so
+declaring a slot here does not force every other plugin in the host to
+register it — `ctx.getService(name)` always returns
+`ServiceRegistry[K] | undefined` and the caller decides how to handle a
+missing entry.
+
+The empty `export {}` at the bottom is required for the file to count
+as a module rather than a script; without it, the `declare module`
+block silently no-ops. Chunks B and C augment the same registry from
+their own modules, leveraging declaration merging.

packages/api-stack/api/api-plugin-campaigns/src/services/registry-augmentation.ts

@@ -0,0 +1,38 @@
+/**
+ * `ServiceRegistry` module augmentation for
+ * `@suaveplan/api-plugin-campaigns`. Importing this module for side
+ * effects (which the package root barrel does automatically) reserves
+ * the host-side slots (`app`, `db`, `openAPIRegistry`,
+ * `migrationRunner`, `logger`, `eventBus`, `clock`) so the plugin's
+ * `onInit` can resolve them with full typing even when this plugin is
+ * imported in isolation. Chunk C populates the repository slots
+ * (`campaignRepository`, `campaignSuppressionStore`,
+ * `deliveryEventStore`) at runtime via `ctx.registerService(...)`.
+ */
+
+import type { OpenAPIHono } from "@hono/zod-openapi";
+import type { MigrationRunner } from "@suaveplan/api-migrations";
+import type { OpenAPIRegistry } from "@suaveplan/api-openapi";
+import type { CampaignStore } from "@suaveplan/campaigns";
+import type { DeliveryEventStore } from "@suaveplan/delivery-tracking";
+import type { SurrealAdapter } from "@suaveplan/surrealdb";
+import type { Clock, EventBusLike, LoggerLike } from "@suaveplan/types";
+import type { CampaignSuppressionStore } from "../repositories/suppression/suppression.types.js";
+
+declare module "@suaveplan/api-plugin/service-registry" {
+    interface ServiceRegistry {
+        app: OpenAPIHono;
+        openAPIRegistry: OpenAPIRegistry;
+        logger: LoggerLike;
+        eventBus: EventBusLike;
+        clock: Clock;
+        db?: SurrealAdapter;
+        migrationRunner?: MigrationRunner;
+        // Chunk C populates these at runtime via `ctx.registerService`.
+        // They remain optional so consumers can import the plugin in
+        // isolation (without an `onInit` having fired) and still type-check.
+        campaignRepository?: CampaignStore;
+        campaignSuppressionStore?: CampaignSuppressionStore;
+        deliveryEventStore?: DeliveryEventStore;
+    }
+}

packages/api-stack/api/api-plugin-campaigns/src/types/index.ts

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+export type { CampaignsPluginConfig, CampaignsPluginOptions } from "./types.js";

packages/api-stack/api/api-plugin-campaigns/src/types/types.md

@@ -0,0 +1,77 @@
+# `types`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `types` module exports the public type bundle for
+`@suaveplan/api-plugin-campaigns` — the option-input shape consumers pass
+to `createCampaignsPlugin`, and the fully-resolved config shape stored on
+the plugin descriptor's `defaults` slot. Keeping the two shapes distinct
+matters because the input has every field optional (the Zod schema fills
+defaults at parse time) while the resolved config has every required
+field present, so the rest of the package can read it without nullish
+chaining.
+
+Hono `ContextVariableMap` augmentations and `ServiceRegistry`
+augmentations live in their own `context/` and `services/` modules
+respectively, so this file stays declaration-only. That separation is
+important during the chunked migration: Chunk B and Chunk C will add
+new repository-typed slots to the registry without touching the
+public-API shapes exported here.
+
+## Features
+
+- `CampaignsPluginConfig` — fully-resolved, readonly config record.
+- `CampaignsPluginOptions` — raw, all-optional input shape.
+- Both interfaces are pure type declarations and ship zero runtime code.
+
+## Usage: Basic
+
+```ts
+import type {
+    CampaignsPluginConfig,
+    CampaignsPluginOptions,
+} from "@suaveplan/api-plugin-campaigns";
+
+const opts: CampaignsPluginOptions = { routePrefix: "/api" };
+```
+
+## Usage: Advanced
+
+```ts
+import type { CampaignsPluginConfig } from "@suaveplan/api-plugin-campaigns";
+
+function describeConfig(cfg: CampaignsPluginConfig): string {
+    return `mount=${cfg.routePrefix} cap=${cfg.maxCampaignsPerTenant}`;
+}
+```
+
+## API Reference
+
+- `interface CampaignsPluginConfig`
+  - `routePrefix: string` — route mount prefix.
+  - `maxCampaignsPerTenant: number` — soft cap on retained campaigns.
+  - `maxRecipientsPerCampaign: number` — recipient ceiling per campaign.
+  - `defaultThrottlePerSecond: number` — dispatch throttle ceiling.
+  - `applySchemaOnInit: boolean` — toggle for the bundled DDL apply
+    step (wired by Chunk B/C).
+  - `logger?: LoggerLike` — optional override logger.
+- `interface CampaignsPluginOptions` — same fields, all optional.
+
+## Implementation Notes
+
+Both interfaces are `readonly` because once Zod has parsed the input,
+the rest of the package treats the resulting config as immutable.
+Marking the fields `readonly` at the type level catches the common
+mistake of mutating the resolved config inside `onInit`. The logger
+field's `?` modifier is preserved across both shapes so consumers can
+spread one into the other without TypeScript inferring `undefined` into
+a required slot.
+
+The `applySchemaOnInit` toggle is part of the Chunk-A surface even
+though no Chunk-A code path consumes it — exposing the field now means
+Chunk B can wire it without bumping the public type signature. The
+no-op `onInit` placeholder simply ignores the flag.

packages/api-stack/api/api-plugin-campaigns/src/types/types.ts

@@ -0,0 +1,35 @@
+/**
+ * Public type bundle for `@suaveplan/api-plugin-campaigns`. Only the
+ * config + descriptor shapes that consumers depend on at compile time
+ * live here. Hono `ContextVariableMap` augmentations live in
+ * `../context/context.ts`; ServiceRegistry augmentations live in
+ * `../services/registry-augmentation.ts`.
+ */
+
+import type { LoggerLike } from "@suaveplan/types";
+
+/** Validated config carried by the descriptor's `defaults` slot. */
+export interface CampaignsPluginConfig {
+    /** Route mount prefix (default `"/"`). */
+    readonly routePrefix: string;
+    /** Maximum number of campaigns retained per tenant (soft cap). */
+    readonly maxCampaignsPerTenant: number;
+    /** Maximum number of recipients accepted in a single campaign. */
+    readonly maxRecipientsPerCampaign: number;
+    /** Per-second send throttle ceiling applied at dispatch time. */
+    readonly defaultThrottlePerSecond: number;
+    /** When `true`, plugin `onInit` applies the bundled SurrealQL schema (Chunk B/C wire this). */
+    readonly applySchemaOnInit: boolean;
+    /** Optional override logger; falls back to `ctx.logger`. */
+    readonly logger?: LoggerLike;
+}
+
+/** Raw options accepted by `createCampaignsPlugin`. All fields optional. */
+export interface CampaignsPluginOptions {
+    readonly routePrefix?: string;
+    readonly maxCampaignsPerTenant?: number;
+    readonly maxRecipientsPerCampaign?: number;
+    readonly defaultThrottlePerSecond?: number;
+    readonly applySchemaOnInit?: boolean;
+    readonly logger?: LoggerLike;
+}