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openspec/archive/2026-05-19-add-api-plugin-cms/proposal.md
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openspec/archive/2026-05-19-add-api-plugin-cms/proposal.md
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# Add @suaveplan/api-plugin-cms
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**Package**: `@suaveplan/api-plugin-cms`
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**Status**: PROPOSED
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**Type**: new-package
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## Why
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Headless-CMS primitives for `@suaveplan/api` applications. The upstream
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package on main (`/mnt/s/web/suaveplan/packages/server/api-plugin-cms`)
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ships a `CmsEngine` that manages flexible `ContentModel` definitions,
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`ContentEntry` records with `draft → review → published → archived`
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status transitions guarded by `VALID_STATUS_TRANSITIONS`, versioned
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`ContentVersion` history, slug uniqueness, an RFC 7807 problem+json
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helper, and a `CmsError` hierarchy registered into the shared error
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metadata registry on module load. Genesis needs that surface ported at
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full functional parity so downstream `@suaveplan/api` apps can author
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content models, validate entries, and walk the status lifecycle without
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reaching for main.
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## What changes
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- ADDED: `CmsEngine` — in-memory CMS core managing models, entries, and
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version history; emits eight typed events through `@suaveplan/events`.
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- ADDED: `CmsError`, `CMS_CODES`, `CmsErrorCode` — `SuaveplanError`
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subclass and seven stable error codes (`CONTENT_NOT_FOUND`,
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`MODEL_NOT_FOUND`, `INVALID_TRANSITION`, `VALIDATION_FAILED`,
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`DUPLICATE_SLUG`, `MODEL_IN_USE`, `INVALID_INPUT`). The first six are
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verbatim upstream; `INVALID_INPUT` is raised by the new
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`createCmsPlugin` factory when Zod boundary validation fails (genesis
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convention, mirrors `api-plugin-audit` / `api-plugin-database`).
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- ADDED: `contentNotFound`, `modelNotFound`, `invalidStatusTransition`,
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`validationFailed`, `duplicateSlug`, `modelInUse` — error-factory
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helpers.
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- ADDED: `respondProblemJson`, `formatProblemJson`,
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`PROBLEM_JSON_CONTENT_TYPE`, `HttpResponseLike`, `ProblemDetails` —
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RFC 7807 problem+json rendering.
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- ADDED: `ContentStatus`, `ContentType`, `FieldType`, `ContentField`,
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`FieldValidation`, `ContentModel`, `ContentEntry`, `ContentVersion`,
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`CreateContentInput`, `UpdateContentInput`, `ContentQuery`,
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`CmsEventMap` — content-model types.
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- ADDED: `generateSlug`, `validateContentData`,
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`VALID_STATUS_TRANSITIONS` — utility surface.
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- ADDED: `createCmsPlugin` — `definePlugin()` factory that registers
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the constructed `CmsEngine` as the `cms` slot on the host
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`ServiceRegistry`, matching the genesis api-plugin convention.
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- ADDED: `CmsPluginOptionsSchema`, `CmsPluginOptions`, `CmsPluginConfig`
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— Zod-validated plugin options bundle (injectable
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`Clock` / `IdGenerator`).
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- ADDED: `CmsInstruments`, `getCmsInstruments`, `resetCmsInstruments` —
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OTel meter bundle (content created / updated / published / archived /
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deleted counters; model created counter; validation-failure counter).
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## Out of scope
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- SurrealDB storage adapter — upstream is in-memory only; matched.
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- HTTP route mounting on `app` — upstream ships `respondProblemJson` but
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no actual routes; matched.
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- Auth/role gating, audit-log integration, webhook/preview tokens,
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rich-text/media handling, full-text search hook — every item listed
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under §4 of `enterprise/api-plugin-cms.md` is an aspirational future
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enhancement, not in the upstream baseline.
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- Counter-based ID replacement with ULID — kept as an injectable
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`IdGenerator` so callers wanting ULID supply it; default mirrors
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upstream `cms_<n>_<ts>` for byte-identical parity.
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## Source mapping
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This change derives from
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`../suaveplan/enterprise/api-plugin-cms.md` and the upstream source at
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`../suaveplan/packages/server/api-plugin-cms/`.
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| Requirement | Source lines | Notes |
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|---|---|---|
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| `CmsEngine` lifecycle (`createModel`, `getModel`, `listModels`, `deleteModel`) | upstream `src/routes/cms-engine.ts` L38–L70 | verbatim port — same method bodies, adapted to `EventBus<CmsEventMap>` instead of upstream `EventEmitter` |
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| Content entry CRUD (`createContent`, `getContent`, `queryContent`, `updateContent`, `deleteContent`) | upstream `src/routes/cms-engine.ts` L71–L210 | verbatim port — query filtering / sorting / paging preserved |
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| Status-transition guard via `VALID_STATUS_TRANSITIONS` | upstream `src/routes/cms-engine.ts` L179–L202 + `src/types/cms.types.ts` L134–L142 | verbatim |
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| Versioned history (`getVersions`, `saveVersion`) | upstream `src/routes/cms-engine.ts` L213–L230 | verbatim |
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| `CmsError` + six factory helpers | upstream `src/errors/cms-errors.ts` L1–L71 | adapted from `BaseError<Code, Context>` to genesis `SuaveplanError<Code>` (genesis has no second-generic context — context lives on `options.context`) |
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| Stable code registry (`CMS_CODES`) | upstream `src/errors/error-codes.ts` L20–L74 | adapted from upstream `ErrorCodes.registerMany(metadata)` (no equivalent in genesis `@suaveplan/error`) to `defineCodes("CMS", [...])`; HTTP-status metadata folded into the problem-json renderer (mirrors `api-plugin-database`) |
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| Side-effect import of code registry on barrel load | upstream `src/index.ts` L3 | matched — `src/index.ts` side-effect-imports `./error-codes/error-codes.js` |
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| `respondProblemJson`, `PROBLEM_JSON_CONTENT_TYPE` | upstream `src/routes/problem-json.ts` L1–L47 | adapted — genesis `@suaveplan/error` does not yet ship `HttpError` / `formatErrorAsProblemJson` / `ProblemDetails`, so a local `formatProblemJson` mirrors `api-plugin-database`'s pattern |
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| `ContentStatus`, `ContentType`, `FieldType`, `ContentField`, `FieldValidation`, `ContentModel`, `ContentEntry`, `ContentVersion`, `CreateContentInput`, `UpdateContentInput`, `ContentQuery`, `CmsEventMap` | upstream `src/types/cms.types.ts` L1–L131 | verbatim |
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| `generateSlug` | upstream `src/types/cms.types.ts` L145–L152 | verbatim |
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| `validateContentData` + private `validateField` | upstream `src/types/cms.types.ts` L155–L230 | verbatim |
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| `VALID_STATUS_TRANSITIONS` | upstream `src/types/cms.types.ts` L134–L142 | verbatim |
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### Requirements with no source line
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| Requirement | Justification |
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|---|---|
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| `createCmsPlugin` factory + `cms` ServiceRegistry slot | Every other genesis `api-plugin-*` ships a `definePlugin()` factory wiring its primary service into the registry. Matching the convention costs <50 lines and aligns with `enterprise/api-plugin-cms.md` §3 "Clarify identity → wrap in `definePlugin()`". |
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| `CmsPluginOptionsSchema` (Zod) | Genesis-wide policy: every public option bundle is Zod-validated at the boundary (CLAUDE.md). |
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| `Clock` / `IdGenerator` injection | Genesis-wide policy: no `new Date()` in hot paths, no non-deterministic ID generation in tests (CLAUDE.md "Code Organization"). Default factory mirrors upstream behavior byte-for-byte. |
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| OTel instrument bundle | Genesis-wide policy: every plugin emits OTel metrics from its production hot path and asserts them with an in-memory `MeterProvider`. |
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| 100% test coverage | Genesis-wide policy, not package-specific. |
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## Verification approach
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Every requirement in the spec delta is pinned by concrete `it(...)`
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titles. Test files that will exist after this change ships:
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- `src/engine/cms-engine.test.ts` — covers model + content CRUD,
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query filtering / sorting / paging, status transitions, version
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history, event emission, and every error-throwing path.
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- `src/engine/cms-engine.spec-conformance.test.ts` — pins type-level
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claims (`expectTypeOf` on `CmsEngine`'s event map), determinism with
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injected `Clock` / `IdGenerator`, and the full `CMS_CODES` enumeration.
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- `src/error-codes/error-codes.test.ts` — every factory raises the
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expected code; `cause` chain is preserved; `instanceof CmsError`
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narrows.
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- `src/routes/problem-json.test.ts` — covers `CmsError` → 4xx/409
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mapping, generic `SuaveplanError` → 500, non-error throwables → 500.
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- `src/schemas/options.test.ts` — Zod boundary accept/reject,
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default-fill behavior.
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- `src/plugin/plugin.test.ts` — factory returns valid `PluginDescriptor`,
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`onInit` registers `cms` in the `ServiceRegistry`, `onClose` clears it,
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invalid options raise `CMS_CODES.INVALID_INPUT`.
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- `src/otel/instruments.test.ts` — instruments are emitted from the
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engine and observed via in-memory `MeterProvider`.
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- `src/types/cms.types.test.ts` — `generateSlug`, `validateContentData`,
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`VALID_STATUS_TRANSITIONS` shape.
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- `src/api-plugin-cms.spec-conformance.test.ts` — every `CMS.*` code is
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thrown from at least one production path; barrel side-effect-imports
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the code registry.
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- `tests/dep-graph.test.ts` — pins the eight runtime workspace deps and
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forbids drift.
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## Migration impact
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None — additive only. New package; no existing consumers.
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