Initial Commit

packages/media/audio-ir/README.md

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+# `audio-ir`
+
+Impulse-response capture, loading, and room-acoustic plugins.
+
+<!-- begin:auto-docs -->
+## Packages in `audio-ir`
+
+4 packages.
+
+| Package | Description |
+|---|---|
+| [`@suaveplan/audio-ir-core`](./audio-ir-core/README.md) | Foundation contract for the `@suaveplan/audio-ir-*` family. Universal; zero `@suaveplan/audio-*` runtime deps. Every sibling package (`audio-ir-loader`, `… |
+| [`@suaveplan/audio-ir-loader`](./audio-ir-loader/README.md) | Pipeline package for the `@suaveplan/audio-ir-*` family. Composes `IrRegistry` (from `@suaveplan/audio-ir-core`), a `StorageUriResolver` (from `@suaveplan/stor… |
+| [`@suaveplan/audio-ir-room-plugin-club`](./audio-ir-room-plugin-club/README.md) | Original audio-ir content package. Ships two bundled room impulse responses (`club1.wav`, `club2.wav`) wired through the `@suaveplan/audio-ir-*` family. |
+| [`@suaveplan/audio-ir-room-plugin-pool`](./audio-ir-room-plugin-pool/README.md) | Original audio-ir content package. Ships a single `room`-family impulse response — `pool-outdoor-swimming-pool` — sourced from the outdoor-swimming-pool captur… |
+<!-- end:auto-docs -->

packages/media/audio-ir/_intro.md

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+Impulse-response capture, loading, and room-acoustic plugins.

packages/media/audio-ir/audio-ir-core/README.md

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+# @suaveplan/audio-ir-core - Foundation contract for the @suaveplan audio-ir family: ImpulseResponse / IrManifestEntry / IrManifest Zod schemas, in-memory IrRegistry, AUDIO_IR.* error-code registry, and OpenTelemetry surface. Universal; zero @suaveplan/audio-* runtime deps.
+
+Foundation contract for the `@suaveplan/audio-ir-*` family. Universal;
+zero `@suaveplan/audio-*` runtime deps. Every sibling package
+(`audio-ir-loader`, `audio-ir-{mic,speaker,room}-plugin-<name>`) consumes
+this package.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [error-codes](./src/error-codes/error-codes.md) — Defines the closed registry of every error code the `@suaveplan/audio-ir-core` runtime is allowed to throw, plus the `A…
+  - [error-codes](./src/error-codes/error-codes.md) — Defines the closed registry of every error code the `@suaveplan/audio-ir-core` runtime is allowed to throw, plus the `A…
+- [otel](./src/otel/otel.md) — Owns every span, counter, and observable gauge the registry emits. The foundation is the layer that knows about the reg…
+  - [otel](./src/otel/otel.md) — Owns every span, counter, and observable gauge the registry emits. The foundation is the layer that knows about the reg…
+- [registrar](./src/registrar/registrar.md) — `MutableUriPluginRegistrar` is the canonical collector interface every `audio-ir-{family}-plugin-<name>` content packag…
+  - [registrar](./src/registrar/registrar.md) — `MutableUriPluginRegistrar` is the canonical collector interface every `audio-ir-{family}-plugin-<name>` content packag…
+- [registry](./src/registry/registry.md) — In-memory `Map<string, IrManifestEntry>` registry — the central seam between content packages (which register entries)…
+  - [register-manifest](./src/registry/register-manifest.md) — Thin iterator over `manifest.entries` that calls `registry.register(entry, { manifestSlug: manifest.packageSlug, manife…
+  - [registry](./src/registry/registry.md) — In-memory `Map<string, IrManifestEntry>` registry — the central seam between content packages (which register entries)…
+- [impulse-response](./src/types/impulse-response.md) — Defines the in-memory shape of a fully-decoded impulse response — the value `@suaveplan/audio-ir-loader.load(id)` retur…
+- [manifest-entry](./src/types/manifest-entry.md) — Defines the on-the-wire shape of a single entry inside an `IrManifest`. An entry is the smallest unit a content package…
+- [manifest](./src/types/manifest.md) — Defines the on-the-wire shape of a complete IR manifest — the package-level contract a content package (e.g. `audio-ir-…
+<!-- end:auto-docs -->
+
+## What ships
+
+- `ImpulseResponse` / `IrManifestEntry` / `IrManifest` Zod schemas — all
+  frozen on parse, with cross-field refinements (ID-prefix coherence,
+  family coherence, channel-count + duration coherence).
+- `createIrRegistry()` → `IrRegistry` with `register`, `has`, `get`,
+  `list`, `clear`.
+- `registerManifest(registry, manifest)` bulk helper.
+- `AUDIO_IR.*` error-code registry — exactly five codes, every one
+  reachable from a real production call site.
+- OpenTelemetry surface — `audio_ir.registrations_total`,
+  `audio_ir.lookups_total`, `audio_ir.errors_total`,
+  `audio_ir.registry_size{family}`.
+
+## Modules
+
+| Module | Subpath | Docs |
+| --- | --- | --- |
+| Manifest entry schema | `./types` | [`src/types/manifest-entry.md`](./src/types/manifest-entry.md) |
+| Manifest schema | `./types` | [`src/types/manifest.md`](./src/types/manifest.md) |
+| `ImpulseResponse` schema | `./types` | [`src/types/impulse-response.md`](./src/types/impulse-response.md) |
+| `AUDIO_IR.*` codes | `./error-codes` | [`src/error-codes/error-codes.md`](./src/error-codes/error-codes.md) |
+| In-memory registry | `./registry` | [`src/registry/registry.md`](./src/registry/registry.md) |
+| `registerManifest` helper | `./registry` | [`src/registry/register-manifest.md`](./src/registry/register-manifest.md) |
+| OTel instruments | `./otel` | [`src/otel/otel.md`](./src/otel/otel.md) |
+| URI plugin registrar | `./registrar` | [`src/registrar/registrar.md`](./src/registrar/registrar.md) |
+
+## Design
+
+The cross-cutting design for the IR family lives in
+
+That file is the source of truth for the family layering, ID derivation
+rule, URI strategy, and OTel split.
+
+## Quick install
+
+This package is wave-0 foundation — depended on, not depending on, the
+rest of the audio-ir family. Pull it directly:
+
+```ts
+import {
+    createIrRegistry,
+    IrManifestSchema,
+    registerManifest,
+} from "@suaveplan/audio-ir-core";
+
+const registry = createIrRegistry();
+const manifest = IrManifestSchema.parse(rawManifestFromContentPackage);
+registerManifest(registry, manifest);
+```
+
+## Composing IR content packages
+
+Every `audio-ir-{family}-plugin-<name>` content package exposes a
+`register(registry, collector, options?)` function. `collector` is a
+`MutableUriPluginRegistrar` — a one-method object `{ use(plugin) }`. Pre-
+construct a collector, call every content package's `register(...)`, then
+hand the gathered `plugins` snapshot to `createStorageUriResolver` once:
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { register as registerClub } from "@suaveplan/audio-ir-room-plugin-club";
+import { register as registerPool } from "@suaveplan/audio-ir-room-plugin-pool";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+
+// Each content package calls collector.use(plugin) for every bundle plugin.
+registerPool(registry, collector);
+registerClub(registry, collector);
+
+// `collector.plugins` is a frozen snapshot — safe to hand off directly.
+const resolver = createStorageUriResolver({ plugins: collector.plugins });
+```
+
+The collector is order-preserving and snapshot-frozen, so consumers can
+compose multiple content packages — or fan out to multiple resolvers
+(parent + inner, sharded, future builder) — without each content package
+needing to agree on resolver shape. See
+[`src/registrar/registrar.md`](./src/registrar/registrar.md) for the full
+API reference.
+

packages/media/audio-ir/audio-ir-core/package.json

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+{
+    "name": "@suaveplan/audio-ir-core",
+    "version": "0.1.0",
+    "type": "module",
+    "sideEffects": false,
+    "description": "Foundation contract for the @suaveplan audio-ir family: ImpulseResponse / IrManifestEntry / IrManifest Zod schemas, in-memory IrRegistry, AUDIO_IR.* error-code registry, and OpenTelemetry surface. Universal; zero @suaveplan/audio-* runtime deps.",
+    "license": "MIT",
+    "author": "Suaveplan Team",
+    "main": "./dist/index.js",
+    "module": "./dist/index.js",
+    "types": "./dist/index.d.ts",
+    "exports": {
+        "./package.json": "./package.json",
+        ".": {
+            "import": {
+                "types": "./dist/index.d.ts",
+                "default": "./dist/index.js"
+            }
+        },
+        "./types": {
+            "import": {
+                "types": "./dist/types/index.d.ts",
+                "default": "./dist/types/index.js"
+            }
+        },
+        "./registry": {
+            "import": {
+                "types": "./dist/registry/index.d.ts",
+                "default": "./dist/registry/index.js"
+            }
+        },
+        "./error-codes": {
+            "import": {
+                "types": "./dist/error-codes/index.d.ts",
+                "default": "./dist/error-codes/index.js"
+            }
+        },
+        "./otel": {
+            "import": {
+                "types": "./dist/otel/index.d.ts",
+                "default": "./dist/otel/index.js"
+            }
+        },
+        "./registrar": {
+            "import": {
+                "types": "./dist/registrar/index.d.ts",
+                "default": "./dist/registrar/index.js"
+            }
+        }
+    },
+    "scripts": {
+        "build": "vite build",
+        "test": "vitest run --passWithNoTests",
+        "test:watch": "vitest",
+        "test:coverage": "vitest run --coverage --passWithNoTests",
+        "lint": "bunx biome check src/",
+        "lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/",
+        "format": "bunx biome format --write --max-diagnostics 500 src/",
+        "check": "bunx biome check --write --unsafe --max-diagnostics 500 src/",
+        "typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
+        "docs:check": "bun run ../../../../scripts/docs-check.ts ."
+    },
+    "dependencies": {
+        "@opentelemetry/api": "catalog:observability",
+        "@suaveplan/error": "workspace:^",
+        "@suaveplan/opentelemetry": "workspace:^",
+        "@suaveplan/storage-uri": "workspace:^",
+        "@suaveplan/types": "workspace:^",
+        "tslib": "catalog:build",
+        "zod": "catalog:forms"
+    },
+    "devDependencies": {
+        "@suaveplan/testing": "workspace:^",
+        "@types/node": "catalog:",
+        "@vitest/coverage-istanbul": "catalog:testing",
+        "typescript": "catalog:",
+        "vite": "catalog:build",
+        "vite-plugin-dts": "catalog:build",
+        "vitest": "catalog:testing"
+    },
+    "publishConfig": {
+        "registry": "https://npmjs.fq.io/",
+        "access": "public"
+    },
+    "files": [
+        "dist",
+        "src",
+        "README.md"
+    ]
+}

packages/media/audio-ir/audio-ir-core/src/error-codes/error-codes.md

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+# `error-codes` — `AUDIO_IR.*` registry
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+Defines the closed registry of every error code the `@suaveplan/audio-ir-core`
+runtime is allowed to throw, plus the `AudioIrError` class that carries the
+typed discriminants alongside each throw. The registry is built with
+`defineCodes("AUDIO_IR", [...] as const)` from `@suaveplan/error`, which
+freezes the resulting record and folds the namespace prefix in once so call
+sites read as `AUDIO_IR_CODES.DUPLICATE_ID === "AUDIO_IR.DUPLICATE_ID"`.
+
+The codes form the public contract between the registry and its operators:
+log pipelines, alerting rules, and OTel attribute filters all key off the
+`AUDIO_IR.*` strings. Adding a code is a spec change; renaming is a breaking
+change. The exhaustion test in `error-codes.test.ts` guarantees every code
+listed here is reachable from a real production call site.
+
+## Features
+
+- Exactly five frozen codes — `DUPLICATE_ID`, `NOT_REGISTERED`,
+  `INVALID_MANIFEST`, `ID_PREFIX_MISMATCH`, `FAMILY_MISMATCH`.
+- `AudioIrError` extends `SuaveplanError<AudioIrErrorCode>` so
+  `instanceof AudioIrError` narrows `code` to the literal union.
+- Typed discriminants on the error instance: `id`, `manifestSlug`,
+  `manifestFamily`, `entryFamily`, `expectedPrefix`, `actualId`. Operators
+  filter on those properties — never on substring matches of the message.
+- Plays nicely with `walkCauses` / `toSpanEvent` from `@suaveplan/error`.
+
+## Usage: Basic
+
+```ts
+import { AUDIO_IR_CODES, AudioIrError } from "@suaveplan/audio-ir-core";
+
+throw new AudioIrError(AUDIO_IR_CODES.NOT_REGISTERED, "audio_ir.not_registered", {
+    id: "club-club1",
+});
+```
+
+## Usage: Advanced
+
+```ts
+import { AUDIO_IR_CODES, AudioIrError } from "@suaveplan/audio-ir-core";
+
+try {
+    registry.register(entry, { manifestSlug: "club", manifestFamily: "room" });
+} catch (err) {
+    if (err instanceof AudioIrError && err.code === AUDIO_IR_CODES.ID_PREFIX_MISMATCH) {
+        // err.expectedPrefix and err.actualId are typed `string | undefined`.
+        console.error({
+            code: err.code,
+            expectedPrefix: err.expectedPrefix,
+            actualId: err.actualId,
+        });
+    }
+    throw err;
+}
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `AUDIO_IR_CODES` | `const` | Frozen `{ DUPLICATE_ID, NOT_REGISTERED, INVALID_MANIFEST, ID_PREFIX_MISMATCH, FAMILY_MISMATCH }` mapped to `"AUDIO_IR.<reason>"`. |
+| `AudioIrErrorCode` | `type` | Union of the five fully-qualified code strings. |
+| `AudioIrErrorOptions` | `interface` | Extends `SuaveplanErrorOptions` with typed discriminants (`id`, `manifestSlug`, `manifestFamily`, `entryFamily`, `expectedPrefix`, `actualId`). |
+| `AudioIrError` | `class` | `SuaveplanError<AudioIrErrorCode>` subclass. Read-only typed properties surface every discriminant. |
+
+## Implementation Notes
+
+The registry deliberately omits the namespace inside `defineCodes` because
+the helper folds it in; spelling `"AUDIO_IR.DUPLICATE_ID"` here would
+double-prefix to `"AUDIO_IR.AUDIO_IR.DUPLICATE_ID"`. The exhaustion test
+walks `Object.values(AUDIO_IR_CODES)` and asserts that each code is thrown
+from a real production path inside the package — not from a test fixture.
+This closes the gap where a code can be registered, leaked into the OTel
+attribute vocabulary, and then never actually emitted.
+
+`AudioIrError` does NOT make `id` mandatory because not every throw site has
+one (`INVALID_MANIFEST` thrown from a malformed manifest object has no id).
+Discriminants are typed `T | undefined` to keep the no-fallback honesty of
+the wire-format contract.

packages/media/audio-ir/audio-ir-core/src/error-codes/error-codes.test.ts

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+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { createIrRegistry, registerManifest } from "../registry/index.js";
+import { IrManifestSchema } from "../types/manifest.js";
+import {
+    AUDIO_IR_CODES,
+    AudioIrError,
+    type AudioIrErrorCode,
+} from "./error-codes.js";
+
+const VALID_ENTRY = {
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+};
+
+function tryRegister(): AudioIrError | undefined {
+    const reg = createIrRegistry();
+    try {
+        reg.register(
+            { ...VALID_ENTRY, id: "club--bad" },
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+    } catch (err) {
+        if (err instanceof AudioIrError) return err;
+    }
+    return undefined;
+}
+
+function fixtureCallSite(code: AudioIrErrorCode): AudioIrError | undefined {
+    const reg = createIrRegistry();
+    if (code === AUDIO_IR_CODES.DUPLICATE_ID) {
+        reg.register(VALID_ENTRY, {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        try {
+            reg.register(
+                { ...VALID_ENTRY },
+                { manifestSlug: "club", manifestFamily: "room" }
+            );
+        } catch (err) {
+            if (err instanceof AudioIrError) return err;
+        }
+        return undefined;
+    }
+    if (code === AUDIO_IR_CODES.NOT_REGISTERED) {
+        try {
+            reg.get("missing");
+        } catch (err) {
+            if (err instanceof AudioIrError) return err;
+        }
+        return undefined;
+    }
+    if (code === AUDIO_IR_CODES.INVALID_MANIFEST) {
+        try {
+            reg.register(
+                {
+                    ...VALID_ENTRY,
+                    channels: -1,
+                } as unknown as typeof VALID_ENTRY,
+                { manifestSlug: "club", manifestFamily: "room" }
+            );
+        } catch (err) {
+            if (err instanceof AudioIrError) return err;
+        }
+        return undefined;
+    }
+    if (code === AUDIO_IR_CODES.ID_PREFIX_MISMATCH) {
+        try {
+            reg.register(
+                { ...VALID_ENTRY, id: "other-x" },
+                { manifestSlug: "club", manifestFamily: "room" }
+            );
+        } catch (err) {
+            if (err instanceof AudioIrError) return err;
+        }
+        return undefined;
+    }
+    if (code === AUDIO_IR_CODES.FAMILY_MISMATCH) {
+        try {
+            reg.register(
+                { ...VALID_ENTRY, family: "mic" },
+                { manifestSlug: "club", manifestFamily: "room" }
+            );
+        } catch (err) {
+            if (err instanceof AudioIrError) return err;
+        }
+        return undefined;
+    }
+    return undefined;
+}
+
+describe("AUDIO_IR_CODES exhaustion", () => {
+    it("every AUDIO_IR code reachable from a real call site", {
+        timeout: 30000,
+    }, () => {
+        const all = Object.values(AUDIO_IR_CODES);
+        expect(all.length).toBe(5);
+        for (const code of all) {
+            const err = fixtureCallSite(code);
+            expect(err, `no real call site exercises ${code}`).toBeDefined();
+            expect(err?.code).toBe(code);
+        }
+    });
+
+    it("registry exposes exactly five codes", { timeout: 5000 }, () => {
+        const names = Object.keys(AUDIO_IR_CODES).sort();
+        expect(names).toEqual([
+            "DUPLICATE_ID",
+            "FAMILY_MISMATCH",
+            "ID_PREFIX_MISMATCH",
+            "INVALID_MANIFEST",
+            "NOT_REGISTERED",
+        ]);
+    });
+
+    it("AUDIO_IR_CODES registry is frozen", { timeout: 5000 }, () => {
+        expect(Object.isFrozen(AUDIO_IR_CODES)).toBe(true);
+    });
+
+    it("AudioIrError surfaces typed discriminants", { timeout: 5000 }, () => {
+        const err = tryRegister();
+        expect(err).toBeInstanceOf(AudioIrError);
+        expect(err?.code).toBe(AUDIO_IR_CODES.INVALID_MANIFEST);
+        expect(err?.name).toBe("AudioIrError");
+        expect(err?.manifestSlug).toBe("club");
+        expect(err?.manifestFamily).toBe("room");
+    });
+
+    it("AudioIrError with no options leaves discriminants undefined", {
+        timeout: 5000,
+    }, () => {
+        const err = new AudioIrError(
+            AUDIO_IR_CODES.NOT_REGISTERED,
+            "audio_ir.not_registered"
+        );
+        expect(err.id).toBeUndefined();
+        expect(err.manifestSlug).toBeUndefined();
+        expect(err.manifestFamily).toBeUndefined();
+        expect(err.entryFamily).toBeUndefined();
+        expect(err.expectedPrefix).toBeUndefined();
+        expect(err.actualId).toBeUndefined();
+    });
+
+    it("manifest path also surfaces ID_PREFIX_MISMATCH through registerManifest", {
+        timeout: 5000,
+    }, () => {
+        // First confirm IrManifestSchema rejects bad-prefix manifests
+        // at parse-time (the manifest layer's own refinement).
+        expect(() =>
+            IrManifestSchema.parse({
+                packageSlug: "club",
+                family: "room",
+                entries: [{ ...VALID_ENTRY, id: "other-1" }],
+            })
+        ).toThrow();
+        // A manifest crafted by hand (skipping schema parse) reaches
+        // registerManifest -> registry.register -> ID_PREFIX_MISMATCH
+        // throw, exercising the same code from a second call site.
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            registerManifest(reg, {
+                packageSlug: "club",
+                family: "room",
+                entries: [{ ...VALID_ENTRY, id: "other-1" }],
+            } as unknown as Parameters<typeof registerManifest>[1]);
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.ID_PREFIX_MISMATCH);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/error-codes/error-codes.ts

@@ -0,0 +1,72 @@
+import {
+    defineCodes,
+    SuaveplanError,
+    type SuaveplanErrorOptions,
+} from "@suaveplan/error";
+
+/**
+ * Frozen registry of every error code raised by `@suaveplan/audio-ir-core`.
+ *
+ * Five codes total — `DUPLICATE_ID`, `NOT_REGISTERED`, `INVALID_MANIFEST`,
+ * `ID_PREFIX_MISMATCH`, `FAMILY_MISMATCH`. Every code is reachable from a
+ * real production call site exercised by the test suite (see
+ * `error-codes.test.ts` for the enumeration). The exhaustion test
+ * guarantees we do not register a code that is never thrown.
+ */
+export const AUDIO_IR_CODES = defineCodes("AUDIO_IR", [
+    "DUPLICATE_ID",
+    "NOT_REGISTERED",
+    "INVALID_MANIFEST",
+    "ID_PREFIX_MISMATCH",
+    "FAMILY_MISMATCH",
+] as const);
+
+export type AudioIrErrorCode =
+    (typeof AUDIO_IR_CODES)[keyof typeof AUDIO_IR_CODES];
+
+export interface AudioIrErrorOptions extends SuaveplanErrorOptions {
+    /** The IR identifier the operation targeted. */
+    id?: string;
+    /** The package slug the manifest declared. */
+    manifestSlug?: string;
+    /** The IR family the manifest declared. */
+    manifestFamily?: "mic" | "speaker" | "room";
+    /** The IR family the offending entry declared. */
+    entryFamily?: "mic" | "speaker" | "room";
+    /** The slug-prefix the registry expected (e.g. `"club-"`). */
+    expectedPrefix?: string;
+    /** The actual id the entry carried. */
+    actualId?: string;
+}
+
+/**
+ * Structured error for every `AUDIO_IR.*` throw.
+ *
+ * Every dimension an operator filters on is a typed discriminant — never
+ * parsed from message text. `id`, `manifestSlug`, `manifestFamily`,
+ * `entryFamily`, `expectedPrefix`, `actualId` are all surfaced as
+ * read-only properties.
+ */
+export class AudioIrError extends SuaveplanError<AudioIrErrorCode> {
+    public readonly id: string | undefined;
+    public readonly manifestSlug: string | undefined;
+    public readonly manifestFamily: "mic" | "speaker" | "room" | undefined;
+    public readonly entryFamily: "mic" | "speaker" | "room" | undefined;
+    public readonly expectedPrefix: string | undefined;
+    public readonly actualId: string | undefined;
+
+    public constructor(
+        code: AudioIrErrorCode,
+        message: string,
+        options?: AudioIrErrorOptions
+    ) {
+        super(code, message, options);
+        this.id = options?.id;
+        this.manifestSlug = options?.manifestSlug;
+        this.manifestFamily = options?.manifestFamily;
+        this.entryFamily = options?.entryFamily;
+        this.expectedPrefix = options?.expectedPrefix;
+        this.actualId = options?.actualId;
+        this.name = "AudioIrError";
+    }
+}

packages/media/audio-ir/audio-ir-core/src/error-codes/index.ts

@@ -0,0 +1,8 @@
+export type {
+    AudioIrErrorCode,
+    AudioIrErrorOptions,
+} from "./error-codes.js";
+export {
+    AUDIO_IR_CODES,
+    AudioIrError,
+} from "./error-codes.js";

packages/media/audio-ir/audio-ir-core/src/index.ts

@@ -0,0 +1,46 @@
+export {
+    AUDIO_IR_CODES,
+    AudioIrError,
+    type AudioIrErrorCode,
+    type AudioIrErrorOptions,
+} from "./error-codes/error-codes.js";
+export {
+    type AudioIrInstruments,
+    type AudioIrLookupOutcome,
+    type AudioIrRegisterOutcome,
+    getInstruments,
+    recordError,
+    recordLookup,
+    recordRegister,
+    resetInstruments,
+    setAudioIrMeterProvider,
+    setRegistrySizeSampler,
+} from "./otel/otel.js";
+export {
+    createUriPluginCollector,
+    type MutableUriPluginRegistrar,
+    type UriPluginCollector,
+} from "./registrar/registrar.js";
+export { registerManifest } from "./registry/register-manifest.js";
+export {
+    createIrRegistry,
+    type IrListOptions,
+    type IrRegisterContext,
+    type IrRegistry,
+} from "./registry/registry.js";
+export {
+    type ImpulseResponse,
+    ImpulseResponseSchema,
+} from "./types/impulse-response.js";
+export {
+    type IrManifest,
+    IrManifestSchema,
+    IrManifestSlugSchema,
+} from "./types/manifest.js";
+export {
+    IrEntryIdSchema,
+    type IrFamily,
+    IrFamilySchema,
+    type IrManifestEntry,
+    IrManifestEntrySchema,
+} from "./types/manifest-entry.js";

packages/media/audio-ir/audio-ir-core/src/otel/index.ts

@@ -0,0 +1,14 @@
+export type {
+    AudioIrInstruments,
+    AudioIrLookupOutcome,
+    AudioIrRegisterOutcome,
+} from "./otel.js";
+export {
+    getInstruments,
+    recordError,
+    recordLookup,
+    recordRegister,
+    resetInstruments,
+    setAudioIrMeterProvider,
+    setRegistrySizeSampler,
+} from "./otel.js";

packages/media/audio-ir/audio-ir-core/src/otel/otel.md

@@ -0,0 +1,107 @@
+# `otel` — OpenTelemetry surface for `audio-ir-core`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+Owns every span, counter, and observable gauge the registry emits. The
+foundation is the layer that knows about the registry's shape, so it also
+owns the OTel instruments that describe that shape — counters for the
+write/read traffic (`registrations_total`, `lookups_total`), counter for
+every typed throw (`errors_total{code}`), and an observable gauge for the
+per-family registry size sampled on every scrape (`registry_size{family}`).
+
+The loader and content packages own their own metric surfaces
+(`audio_ir_loader.*` for decode duration, fallback hop, cache hit). The
+two surfaces deliberately do not overlap.
+
+## Features
+
+- Lazy instrument construction — bound on first `getInstruments()` call,
+  cached thereafter.
+- Injectable `MeterProvider` via `setAudioIrMeterProvider(provider)` —
+  tests install an in-memory recorder; production leaves it undefined and
+  the global `metrics` is used.
+- Observable gauge with a pluggable sampler — the registry installs a
+  sampler that reports per-family counts on every scrape.
+- `recordRegister` / `recordLookup` also start a span with stable
+  attribute keys (`audio_ir.family`, `audio_ir.outcome`).
+- `recordError(code)` increments `audio_ir.errors_total{code}` for every
+  `AUDIO_IR.*` throw.
+
+## Usage: Basic
+
+```ts
+import { recordRegister } from "@suaveplan/audio-ir-core/otel";
+
+recordRegister("room", "success");
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    type MeterProvider,
+    metrics,
+} from "@opentelemetry/api";
+import {
+    getInstruments,
+    setAudioIrMeterProvider,
+    setRegistrySizeSampler,
+} from "@suaveplan/audio-ir-core/otel";
+
+// In tests: install an in-memory recorder MeterProvider so spec
+// assertions can see exact counter values.
+const recorded: Array<{ name: string; value: number; attributes: unknown }> = [];
+const provider = {
+    getMeter: () => ({
+        createCounter: (name: string) => ({
+            add: (value: number, attributes?: Record<string, unknown>) => {
+                recorded.push({ name, value, attributes });
+            },
+        }),
+        createObservableGauge: (name: string) => ({
+            addCallback: () => undefined,
+        }),
+    }),
+} as unknown as MeterProvider;
+setAudioIrMeterProvider(provider);
+setRegistrySizeSampler(() => new Map([["room", 2]]));
+getInstruments(true);
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `setAudioIrMeterProvider(provider)` | function | Override the provider used to build instruments. Resets the cache. |
+| `setRegistrySizeSampler(sampler)` | function | Install the sampler the observable gauge calls on collection. |
+| `getInstruments(force?)` | function | Lazily build (or return cached) the full instrument bag. |
+| `resetInstruments()` | function | Drop the cache — used by tests between provider swaps. |
+| `recordRegister(family, outcome)` | function | Increment `audio_ir.registrations_total` + start a `audio_ir.register` span. |
+| `recordLookup(family, outcome, op)` | function | Increment `audio_ir.lookups_total` + start a `audio_ir.get` or `audio_ir.has` span. |
+| `recordError(code)` | function | Increment `audio_ir.errors_total{code}` for every typed throw. |
+| `AudioIrInstruments` | interface | Read-only struct of every instrument the package emits. |
+| `AudioIrRegisterOutcome` | type | `"success" \| "error"`. |
+| `AudioIrLookupOutcome` | type | `"hit" \| "miss"`. |
+
+## Implementation Notes
+
+The observable gauge does not retain a snapshot of the registry — it calls
+the installed sampler on every scrape. The registry installs a sampler
+that wraps a live counter `Map<IrFamily, number>` it maintains on
+`register` / `clear`. That keeps the sampler O(1) and avoids the gauge
+ever lagging behind the actual registry state.
+
+`setAudioIrMeterProvider(undefined)` reverts to the global `metrics`
+provider AND clears the cached instrument bag, so subsequent calls
+rebuild against the global. Tests must call this in cleanup or the next
+test inherits the stub.
+
+The injected provider in tests IS a real `MeterProvider` implementation
+(it satisfies the public interface from `@opentelemetry/api`) — it is not
+a mock function. The recorder bookkeeping is the implementation. This
+honours the no-mocks rule while keeping the assertion surface narrow
+enough to write maintainable tests.

packages/media/audio-ir/audio-ir-core/src/otel/otel.test.ts

@@ -0,0 +1,272 @@
+import type { MeterProvider } from "@opentelemetry/api";
+import { afterEach, describe, expect, it } from "@suaveplan/testing/runner";
+import { AUDIO_IR_CODES, AudioIrError } from "../error-codes/error-codes.js";
+import { createIrRegistry } from "../registry/registry.js";
+import {
+    getInstruments,
+    recordError,
+    recordLookup,
+    recordRegister,
+    resetInstruments,
+    setAudioIrMeterProvider,
+    setRegistrySizeSampler,
+} from "./otel.js";
+
+interface CounterObs {
+    readonly name: string;
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+interface GaugeObs {
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+
+interface Recorder {
+    readonly counters: CounterObs[];
+    readonly gauges: GaugeObs[];
+    sampleGauge(): void;
+}
+
+/**
+ * Real in-memory `MeterProvider` implementation. No mocks — every method
+ * on the public OTel API surface is implemented with deterministic
+ * in-memory bookkeeping. Tests install this with
+ * `setAudioIrMeterProvider`, then call `sampleGauge()` to fire the
+ * observable-gauge callback explicitly.
+ */
+function installRecorder(): Recorder {
+    const counters: CounterObs[] = [];
+    const gauges: GaugeObs[] = [];
+    type GaugeCallback = (result: {
+        observe: (value: number, attrs?: Record<string, unknown>) => void;
+    }) => void;
+    const gaugeCallbacks: GaugeCallback[] = [];
+    const provider = {
+        getMeter: () => ({
+            createCounter: (name: string) => ({
+                add: (value: number, attrs?: Record<string, unknown>) => {
+                    counters.push({ name, value, attributes: attrs ?? {} });
+                },
+            }),
+            createObservableGauge: (_name: string) => ({
+                addCallback: (cb: GaugeCallback) => {
+                    gaugeCallbacks.push(cb);
+                },
+            }),
+        }),
+    } as unknown as MeterProvider;
+    setAudioIrMeterProvider(provider);
+    getInstruments(true);
+    return {
+        counters,
+        gauges,
+        sampleGauge() {
+            for (const cb of gaugeCallbacks) {
+                cb({
+                    observe: (value, attrs) =>
+                        gauges.push({ value, attributes: attrs ?? {} }),
+                });
+            }
+        },
+    };
+}
+
+function uninstallRecorder(): void {
+    setAudioIrMeterProvider(undefined);
+    resetInstruments();
+    setRegistrySizeSampler(undefined);
+}
+
+describe("audio-ir-core OTel surface", () => {
+    afterEach(() => {
+        uninstallRecorder();
+    });
+
+    it("increments registrations_total on successful register", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        const reg = createIrRegistry();
+        reg.register(
+            {
+                id: "club-c1",
+                family: "room",
+                uri: "bundle://x/y.wav",
+                channels: 2,
+                sampleRate: 44100,
+                gainDb: 0,
+                license: "MIT",
+                source: "demo",
+            },
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        const hit = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir.registrations_total" &&
+                c.attributes["family"] === "room" &&
+                c.attributes["outcome"] === "success"
+        );
+        expect(hit).toBeDefined();
+        expect(hit?.value).toBe(1);
+    });
+
+    it("increments errors_total on every AUDIO_IR throw", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            reg.get("nope");
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.NOT_REGISTERED);
+        const hit = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir.errors_total" &&
+                c.attributes["code"] === AUDIO_IR_CODES.NOT_REGISTERED
+        );
+        expect(hit).toBeDefined();
+    });
+
+    it("registry_size gauge reports per-family counts", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        const reg = createIrRegistry();
+        reg.register(
+            {
+                id: "club-r1",
+                family: "room",
+                uri: "bundle://x/y.wav",
+                channels: 2,
+                sampleRate: 44100,
+                gainDb: 0,
+                license: "MIT",
+                source: "demo",
+            },
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        reg.register(
+            {
+                id: "club-r2",
+                family: "room",
+                uri: "bundle://x/z.wav",
+                channels: 2,
+                sampleRate: 44100,
+                gainDb: 0,
+                license: "MIT",
+                source: "demo",
+            },
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        reg.register(
+            {
+                id: "sm57-m1",
+                family: "mic",
+                uri: "bundle://x/m.wav",
+                channels: 1,
+                sampleRate: 44100,
+                gainDb: 0,
+                license: "MIT",
+                source: "demo",
+            },
+            { manifestSlug: "sm57", manifestFamily: "mic" }
+        );
+        rec.sampleGauge();
+        const room = rec.gauges.find((g) => g.attributes["family"] === "room");
+        const mic = rec.gauges.find((g) => g.attributes["family"] === "mic");
+        expect(room?.value).toBe(2);
+        expect(mic?.value).toBe(1);
+    });
+
+    it("lookup hit increments lookups_total with family + outcome=hit", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        const reg = createIrRegistry();
+        reg.register(
+            {
+                id: "club-r1",
+                family: "room",
+                uri: "bundle://x/y.wav",
+                channels: 2,
+                sampleRate: 44100,
+                gainDb: 0,
+                license: "MIT",
+                source: "demo",
+            },
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        reg.get("club-r1");
+        reg.has("club-r1");
+        const hits = rec.counters.filter(
+            (c) =>
+                c.name === "audio_ir.lookups_total" &&
+                c.attributes["outcome"] === "hit" &&
+                c.attributes["family"] === "room"
+        );
+        // Both has() and get() emit a hit.
+        expect(hits.length).toBeGreaterThanOrEqual(2);
+    });
+
+    it("lookup miss increments lookups_total with family=unknown, outcome=miss", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        const reg = createIrRegistry();
+        expect(reg.has("nope")).toBe(false);
+        const miss = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir.lookups_total" &&
+                c.attributes["outcome"] === "miss" &&
+                c.attributes["family"] === "unknown"
+        );
+        expect(miss).toBeDefined();
+    });
+
+    it("gauge with no sampler installed emits no observations", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        setRegistrySizeSampler(undefined);
+        rec.sampleGauge();
+        expect(rec.gauges).toEqual([]);
+    });
+
+    it("getInstruments returns cached instance without force", {
+        timeout: 5000,
+    }, () => {
+        installRecorder();
+        const a = getInstruments();
+        const b = getInstruments();
+        expect(a).toBe(b);
+    });
+
+    it("setAudioIrMeterProvider(undefined) reverts to global provider", {
+        timeout: 5000,
+    }, () => {
+        installRecorder();
+        setAudioIrMeterProvider(undefined);
+        // Subsequent recordRegister still works (no-op meter).
+        recordRegister("room", "success");
+        recordLookup("room", "hit", "get");
+        recordError(AUDIO_IR_CODES.NOT_REGISTERED);
+    });
+
+    it("recordRegister with outcome=error increments the counter", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        recordRegister("speaker", "error");
+        const hit = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir.registrations_total" &&
+                c.attributes["family"] === "speaker" &&
+                c.attributes["outcome"] === "error"
+        );
+        expect(hit).toBeDefined();
+    });
+});

packages/media/audio-ir/audio-ir-core/src/otel/otel.ts

@@ -0,0 +1,138 @@
+import {
+    type Counter,
+    type Meter,
+    type MeterProvider,
+    metrics,
+    type ObservableGauge,
+    type Tracer,
+    trace,
+} from "@opentelemetry/api";
+import type { IrFamily } from "../types/manifest-entry.js";
+
+const METER_NAME = "@suaveplan/audio-ir-core";
+const TRACER_NAME = "@suaveplan/audio-ir-core";
+
+let overrideMeterProvider: MeterProvider | undefined;
+
+/**
+ * Override the meter provider used to acquire instruments. Pass
+ * `undefined` to revert to the global provider. Resets the cached
+ * instrument bag + gauge sampler bindings so the next access binds to
+ * the new provider.
+ */
+export function setAudioIrMeterProvider(
+    provider: MeterProvider | undefined
+): void {
+    overrideMeterProvider = provider;
+    cachedInstruments = undefined;
+    gaugeSampler = undefined;
+}
+
+export type AudioIrRegisterOutcome = "success" | "error";
+export type AudioIrLookupOutcome = "hit" | "miss";
+
+export interface AudioIrInstruments {
+    readonly tracer: Tracer;
+    readonly meter: Meter;
+    readonly registrationsTotal: Counter;
+    readonly lookupsTotal: Counter;
+    readonly errorsTotal: Counter;
+    readonly registrySize: ObservableGauge;
+}
+
+let cachedInstruments: AudioIrInstruments | undefined;
+let gaugeSampler: (() => ReadonlyMap<IrFamily, number>) | undefined;
+
+/**
+ * Register the per-family size sampler the observable gauge calls on
+ * collection. The registry installs this when it builds its instrument
+ * bag; tests may also install a fixed-value sampler.
+ */
+export function setRegistrySizeSampler(
+    sampler: (() => ReadonlyMap<IrFamily, number>) | undefined
+): void {
+    gaugeSampler = sampler;
+}
+
+function buildGauge(meter: Meter): ObservableGauge {
+    const gauge = meter.createObservableGauge("audio_ir.registry_size", {
+        description: "Current registry size per family (mic|speaker|room)",
+    });
+    gauge.addCallback((result) => {
+        if (gaugeSampler === undefined) {
+            // No sampler installed yet — emit a single zero observation so
+            // the gauge always has a sample on scrape.
+            return;
+        }
+        const counts = gaugeSampler();
+        for (const [family, count] of counts) {
+            result.observe(count, { family });
+        }
+    });
+    return gauge;
+}
+
+/** Lazily build (or return cached) instruments bound to the active provider. */
+export function getInstruments(force = false): AudioIrInstruments {
+    if (cachedInstruments !== undefined && !force) return cachedInstruments;
+    const tracer = trace.getTracer(TRACER_NAME);
+    const meter = (overrideMeterProvider ?? metrics).getMeter(METER_NAME);
+    cachedInstruments = {
+        tracer,
+        meter,
+        registrationsTotal: meter.createCounter(
+            "audio_ir.registrations_total",
+            {
+                description:
+                    "IrRegistry.register calls; labels: family, outcome",
+            }
+        ),
+        lookupsTotal: meter.createCounter("audio_ir.lookups_total", {
+            description:
+                "IrRegistry.get / IrRegistry.has calls; labels: family, outcome",
+        }),
+        errorsTotal: meter.createCounter("audio_ir.errors_total", {
+            description:
+                "Every AUDIO_IR.* throw; labels: code (fully-qualified AUDIO_IR.<reason>)",
+        }),
+        registrySize: buildGauge(meter),
+    };
+    return cachedInstruments;
+}
+
+/** Reset cached instruments — used by tests between provider swaps. */
+export function resetInstruments(): void {
+    cachedInstruments = undefined;
+}
+
+/** Increment `audio_ir.registrations_total{family, outcome}`. */
+export function recordRegister(
+    family: IrFamily,
+    outcome: AudioIrRegisterOutcome
+): void {
+    const inst = getInstruments();
+    inst.registrationsTotal.add(1, { family, outcome });
+    const span = inst.tracer.startSpan("audio_ir.register", {
+        attributes: { "audio_ir.family": family, "audio_ir.outcome": outcome },
+    });
+    span.end();
+}
+
+/** Increment `audio_ir.lookups_total{family, outcome}`. */
+export function recordLookup(
+    family: IrFamily | "unknown",
+    outcome: AudioIrLookupOutcome,
+    op: "get" | "has"
+): void {
+    const inst = getInstruments();
+    inst.lookupsTotal.add(1, { family, outcome });
+    const span = inst.tracer.startSpan(`audio_ir.${op}`, {
+        attributes: { "audio_ir.family": family, "audio_ir.outcome": outcome },
+    });
+    span.end();
+}
+
+/** Increment `audio_ir.errors_total{code}`. */
+export function recordError(code: string): void {
+    getInstruments().errorsTotal.add(1, { code });
+}

packages/media/audio-ir/audio-ir-core/src/registrar/index.ts

@@ -0,0 +1,5 @@
+export type {
+    MutableUriPluginRegistrar,
+    UriPluginCollector,
+} from "./registrar.js";
+export { createUriPluginCollector } from "./registrar.js";

packages/media/audio-ir/audio-ir-core/src/registrar/registrar.md

@@ -0,0 +1,110 @@
+# `registrar` — `MutableUriPluginRegistrar` + `createUriPluginCollector()`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+`MutableUriPluginRegistrar` is the canonical collector interface every
+`audio-ir-{family}-plugin-<name>` content package targets when registering
+its bundled URI plugins. Stage-3 ship of `audio-ir-room-plugin-pool`
+discovered that `StorageUriResolver` is frozen at construction — there is
+no `resolver.use(plugin)` after construction — so content packages need a
+mutable seam to deposit URI plugins during their `register(...)` call. This
+module promotes that seam from the pool's local copy into the
+`audio-ir-core` foundation so every content package, present and future,
+targets exactly one shape.
+
+The companion `createUriPluginCollector()` factory wraps an internal
+ordered array and exposes a frozen snapshot via the `plugins` getter, which
+plugs directly into `createStorageUriResolver({ plugins })`. The snapshot
+is rebuilt on every read so a stale read remains immutable even after
+additional `use(...)` calls.
+
+## Features
+
+- `MutableUriPluginRegistrar` — single-method interface
+  (`use(plugin: UriPlugin): void`) decoupled from `StorageUriResolver` so
+  consumers may compose plugin lists across multiple content packages
+  before building one resolver — or a parent + inner resolver, or a future
+  builder.
+- `createUriPluginCollector()` — factory returning
+  `MutableUriPluginRegistrar & { readonly plugins: readonly UriPlugin[] }`.
+  `use()` pushes (insertion-order preserving); `plugins` returns a fresh
+  `Object.freeze([...store])` snapshot on every read.
+- Zero runtime dependencies beyond the `UriPlugin` TYPE import from
+  `@suaveplan/storage-uri`. Universal; no browser or Node surface.
+
+## Usage: Basic
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+    registerManifest,
+} from "@suaveplan/audio-ir-core";
+import { register as registerPoolBundle } from "@suaveplan/audio-ir-room-plugin-pool";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+
+registerPoolBundle(registry, collector);
+
+const resolver = createStorageUriResolver({ plugins: collector.plugins });
+```
+
+## Usage: Advanced
+
+Compose multiple content packages, validate snapshot immutability, and
+keep an audit copy of plugins gathered at each stage:
+
+```ts
+import {
+    createUriPluginCollector,
+    type MutableUriPluginRegistrar,
+} from "@suaveplan/audio-ir-core/registrar";
+import { register as registerClub } from "@suaveplan/audio-ir-room-plugin-club";
+import { register as registerPool } from "@suaveplan/audio-ir-room-plugin-pool";
+
+const collector = createUriPluginCollector();
+registerPool(registry, collector);
+const afterPool = collector.plugins; // frozen snapshot — survives further use()
+registerClub(registry, collector);
+const afterClub = collector.plugins; // new frozen snapshot, contains both bundles
+
+// Adapt an arbitrary sink:
+const externalSink: MutableUriPluginRegistrar = {
+    use: (p) => myObservableArray.push(p),
+};
+registerPool(registry, externalSink);
+```
+
+## API Reference
+
+- `interface MutableUriPluginRegistrar`
+  - `use(plugin: UriPlugin): void` — append a URI plugin to the underlying
+    collection. Implementations MUST preserve call order.
+- `interface UriPluginCollector extends MutableUriPluginRegistrar`
+  - `readonly plugins: readonly UriPlugin[]` — frozen snapshot of plugins
+    pushed via `use`. A new frozen array is allocated on every read.
+- `function createUriPluginCollector(): UriPluginCollector` — fresh
+  collector backed by a private `UriPlugin[]`. `use()` pushes;
+  `plugins` returns `Object.freeze([...store])`.
+
+## Implementation Notes
+
+- The `plugins` accessor returns a defensive copy. Strict-mode callers
+  attempting `(c.plugins as UriPlugin[]).push(extra)` will receive a
+  `TypeError` because the snapshot is frozen.
+- A previously-read snapshot does NOT reflect plugins added after the
+  read — that is the whole point of returning a new frozen array each
+  time. Subsequent `use(...)` calls show up only in subsequent `plugins`
+  reads.
+- The interface does NOT extend `StorageUriResolver` and does NOT touch
+  any resolver-shaped type. Keeping the collector resolver-free is what
+  allows multi-resolver composition (parent + inner, multiple sinks,
+  future builders) without forcing one shape on every consumer.
+- See the package `README.md` `## Composing IR content packages` section
+  for the canonical recipe.

packages/media/audio-ir/audio-ir-core/src/registrar/registrar.spec-conformance.test.ts

@@ -0,0 +1,98 @@
+import type { ParsedUri, UriPlugin } from "@suaveplan/storage-uri";
+import { describe, expect, expectTypeOf, it } from "@suaveplan/testing/runner";
+import type { StorageLike } from "@suaveplan/types";
+import * as rootBarrel from "../index.js";
+import * as registrarSubpath from "./index.js";
+import {
+    createUriPluginCollector,
+    type MutableUriPluginRegistrar,
+} from "./registrar.js";
+
+const noopAdapter: StorageLike = {
+    get: () => Promise.resolve(undefined),
+    set: () => Promise.resolve(),
+    delete: () => Promise.resolve(false),
+    exists: () => Promise.resolve(false),
+    list: () => Promise.resolve({ keys: [], total: 0, hasMore: false }),
+    clear: () => Promise.resolve(),
+};
+
+function plugin(scheme: string): UriPlugin {
+    return {
+        scheme,
+        adapter: noopAdapter,
+        parse: (uri: string): ParsedUri => ({ key: uri }),
+    };
+}
+
+describe("MutableUriPluginRegistrar spec-conformance", () => {
+    it("MutableUriPluginRegistrar accepts a single-method collector object", {
+        timeout: 5000,
+    }, () => {
+        const pluginArray: UriPlugin[] = [];
+        const target: MutableUriPluginRegistrar = {
+            use: (p) => {
+                pluginArray.push(p);
+            },
+        };
+        // Simulate a content-package register() that invokes target.use once
+        // per bundled plugin.
+        const bundle = [plugin("a"), plugin("b")];
+        for (const p of bundle) {
+            target.use(p);
+        }
+        expect(pluginArray).toEqual(bundle);
+        // Type-level: the interface shape is the one-method object we expect.
+        expectTypeOf<MutableUriPluginRegistrar>().toEqualTypeOf<{
+            use(plugin: UriPlugin): void;
+        }>();
+        expectTypeOf<MutableUriPluginRegistrar["use"]>()
+            .parameter(0)
+            .toEqualTypeOf<UriPlugin>();
+        expectTypeOf<
+            MutableUriPluginRegistrar["use"]
+        >().returns.toEqualTypeOf<void>();
+    });
+
+    it("MutableUriPluginRegistrar is exported from the root barrel", {
+        timeout: 5000,
+    }, () => {
+        // Type-level: importing the type from the root barrel yields the same
+        // shape as the local import.
+        expectTypeOf<rootBarrel.MutableUriPluginRegistrar>().toEqualTypeOf<MutableUriPluginRegistrar>();
+        // Value-level: createUriPluginCollector returns an object that the
+        // interface accepts.
+        const c = rootBarrel.createUriPluginCollector();
+        const asTarget: MutableUriPluginRegistrar = c;
+        asTarget.use(plugin("x"));
+        expect(c.plugins).toHaveLength(1);
+    });
+
+    it("root barrel re-exports MutableUriPluginRegistrar and createUriPluginCollector", {
+        timeout: 5000,
+    }, () => {
+        expect(typeof rootBarrel.createUriPluginCollector).toBe("function");
+        // Same reference as the feature-local export.
+        expect(rootBarrel.createUriPluginCollector).toBe(
+            createUriPluginCollector
+        );
+        // Type-level: both symbols compile from the root barrel.
+        expectTypeOf(rootBarrel.createUriPluginCollector).toEqualTypeOf<
+            typeof createUriPluginCollector
+        >();
+        expectTypeOf<rootBarrel.MutableUriPluginRegistrar>().toEqualTypeOf<MutableUriPluginRegistrar>();
+    });
+
+    it("./registrar subpath resolves to the same references as the root barrel", {
+        timeout: 5000,
+    }, () => {
+        expect(registrarSubpath.createUriPluginCollector).toBe(
+            rootBarrel.createUriPluginCollector
+        );
+        expect(registrarSubpath.createUriPluginCollector).toBe(
+            createUriPluginCollector
+        );
+        expectTypeOf<registrarSubpath.MutableUriPluginRegistrar>().toEqualTypeOf<MutableUriPluginRegistrar>();
+        expectTypeOf<registrarSubpath.MutableUriPluginRegistrar>().toEqualTypeOf<rootBarrel.MutableUriPluginRegistrar>();
+    });
+});

packages/media/audio-ir/audio-ir-core/src/registrar/registrar.test.ts

@@ -0,0 +1,93 @@
+import type { ParsedUri, UriPlugin } from "@suaveplan/storage-uri";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import type { StorageLike } from "@suaveplan/types";
+import { createUriPluginCollector } from "./registrar.js";
+
+const noopAdapter: StorageLike = {
+    get: () => Promise.resolve(undefined),
+    set: () => Promise.resolve(),
+    delete: () => Promise.resolve(false),
+    exists: () => Promise.resolve(false),
+    list: () => Promise.resolve({ keys: [], total: 0, hasMore: false }),
+    clear: () => Promise.resolve(),
+};
+
+function plugin(scheme: string): UriPlugin {
+    return {
+        scheme,
+        adapter: noopAdapter,
+        parse: (uri: string): ParsedUri => ({ key: uri }),
+    };
+}
+
+describe("createUriPluginCollector()", () => {
+    it("collector preserves insertion order across use() calls", {
+        timeout: 5000,
+    }, () => {
+        const c = createUriPluginCollector();
+        const pA = plugin("a");
+        const pB = plugin("b");
+        const pC = plugin("c");
+        c.use(pA);
+        c.use(pB);
+        c.use(pC);
+        expect(c.plugins).toEqual([pA, pB, pC]);
+        // Referential equality on each entry.
+        expect(c.plugins[0]).toBe(pA);
+        expect(c.plugins[1]).toBe(pB);
+        expect(c.plugins[2]).toBe(pC);
+    });
+
+    it("plugins snapshot is frozen and rejects mutation", {
+        timeout: 5000,
+    }, () => {
+        const c = createUriPluginCollector();
+        c.use(plugin("a"));
+        const snapshot = c.plugins;
+        expect(Object.isFrozen(snapshot)).toBe(true);
+        expect(() => {
+            (snapshot as UriPlugin[]).push(plugin("x"));
+        }).toThrow(TypeError);
+    });
+
+    it("use() after plugins read reflects in the next snapshot", {
+        timeout: 5000,
+    }, () => {
+        const c = createUriPluginCollector();
+        const pA = plugin("a");
+        const pB = plugin("b");
+        const pD = plugin("d");
+        c.use(pA);
+        c.use(pB);
+        const first = c.plugins;
+        c.use(pD);
+        const second = c.plugins;
+        // First snapshot is unaffected (frozen + defensive copy).
+        expect(first).toEqual([pA, pB]);
+        expect(Object.isFrozen(first)).toBe(true);
+        // Second snapshot reflects the new push.
+        expect(second).toEqual([pA, pB, pD]);
+        expect(second).not.toBe(first);
+    });
+
+    it("returns a fresh frozen array on every plugins read", {
+        timeout: 5000,
+    }, () => {
+        const c = createUriPluginCollector();
+        c.use(plugin("a"));
+        const r1 = c.plugins;
+        const r2 = c.plugins;
+        expect(r1).not.toBe(r2);
+        expect(r1).toEqual(r2);
+        expect(Object.isFrozen(r1)).toBe(true);
+        expect(Object.isFrozen(r2)).toBe(true);
+    });
+
+    it("empty collector exposes an empty frozen snapshot", {
+        timeout: 5000,
+    }, () => {
+        const c = createUriPluginCollector();
+        expect(c.plugins).toEqual([]);
+        expect(Object.isFrozen(c.plugins)).toBe(true);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/registrar/registrar.ts

@@ -0,0 +1,58 @@
+import type { UriPlugin } from "@suaveplan/storage-uri";
+
+/**
+ * Canonical collector interface for IR content packages.
+ *
+ * `audio-ir-{family}-plugin-<name>` content packages expose a
+ * `register(registry, target, options?)` function that calls
+ * `target.use(plugin)` once per bundled URI plugin. The collector pattern is
+ * deliberately decoupled from `StorageUriResolver` construction so callers
+ * may compose plugin lists across multiple content packages before building
+ * a single resolver (or a parent + inner resolver, or a future builder).
+ */
+export interface MutableUriPluginRegistrar {
+    /**
+     * Append a URI plugin to the underlying collection. Implementations MUST
+     * preserve call order.
+     */
+    use(plugin: UriPlugin): void;
+}
+
+/**
+ * Collector returned by {@link createUriPluginCollector}. Adds a read-only
+ * `plugins` accessor that returns a defensive frozen snapshot of the current
+ * list — suitable for passing directly to `createStorageUriResolver({ plugins })`.
+ */
+export interface UriPluginCollector extends MutableUriPluginRegistrar {
+    /** Frozen snapshot of plugins pushed via {@link MutableUriPluginRegistrar.use}. */
+    readonly plugins: readonly UriPlugin[];
+}
+
+/**
+ * Build a fresh ordered collector for URI plugins.
+ *
+ * Internal storage is a private array. {@link MutableUriPluginRegistrar.use}
+ * pushes onto it (preserving insertion order). The `plugins` getter returns a
+ * NEW frozen snapshot on every read, so callers cannot mutate the collector's
+ * internal state after reading and a stale snapshot remains immutable even if
+ * additional plugins are appended later.
+ *
+ * @example
+ * ```ts
+ * const collector = createUriPluginCollector();
+ * registerPoolBundle(registry, collector);
+ * registerClubBundle(registry, collector);
+ * const resolver = createStorageUriResolver({ plugins: collector.plugins });
+ * ```
+ */
+export function createUriPluginCollector(): UriPluginCollector {
+    const store: UriPlugin[] = [];
+    return {
+        use(plugin: UriPlugin): void {
+            store.push(plugin);
+        },
+        get plugins(): readonly UriPlugin[] {
+            return Object.freeze([...store]);
+        },
+    };
+}

packages/media/audio-ir/audio-ir-core/src/registry/index.ts

@@ -0,0 +1,7 @@
+export { registerManifest } from "./register-manifest.js";
+export {
+    createIrRegistry,
+    type IrListOptions,
+    type IrRegisterContext,
+    type IrRegistry,
+} from "./registry.js";

packages/media/audio-ir/audio-ir-core/src/registry/register-manifest.md

@@ -0,0 +1,86 @@
+# `registry/register-manifest` — bulk-register helper
+
+## Purpose
+
+Thin iterator over `manifest.entries` that calls `registry.register(entry,
+{ manifestSlug: manifest.packageSlug, manifestFamily: manifest.family })`
+for each one. The helper exists so content packages don't have to repeat
+the context wiring at every call site — they parse a manifest, hand it +
+the registry to `registerManifest`, and trust the throw surface.
+
+The helper deliberately does NOT wrap the iteration in a try/rollback
+block. If entry N fails, entries 0..N-1 remain registered. Callers that
+need atomicity should run against a fresh `createIrRegistry()` per
+attempt and only swap it in once registration finishes. This is the
+intended workflow for content packages — install once at module load,
+fail fast if the manifest is broken — and means a re-run after fixing a
+broken manifest hits `AUDIO_IR.DUPLICATE_ID` on the partial entries,
+surfacing the conflict immediately.
+
+## Features
+
+- Single-pass iteration in manifest order.
+- Re-throws the original `AudioIrError` verbatim — no wrapping, no loss
+  of typed discriminants.
+- No rollback on partial failure — fail-fast semantics.
+
+## Usage: Basic
+
+```ts
+import { createIrRegistry, registerManifest } from "@suaveplan/audio-ir-core";
+
+const registry = createIrRegistry();
+const manifest = {
+    packageSlug: "club",
+    family: "room" as const,
+    entries: [/* ... two or more entries ... */],
+};
+registerManifest(registry, manifest);
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    AUDIO_IR_CODES,
+    AudioIrError,
+    createIrRegistry,
+    registerManifest,
+} from "@suaveplan/audio-ir-core";
+
+const stagedRegistry = createIrRegistry();
+try {
+    registerManifest(stagedRegistry, untrustedManifest);
+} catch (err) {
+    if (err instanceof AudioIrError && err.code === AUDIO_IR_CODES.DUPLICATE_ID) {
+        console.error(`duplicate id while staging: ${err.id}`);
+    }
+    throw err;
+}
+// Only swap into production after the staged registry has fully accepted.
+publishRegistry(stagedRegistry);
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `registerManifest(registry, manifest)` | function | Iterate `manifest.entries` and `register` each one with manifest-derived context. |
+
+## Implementation Notes
+
+The helper is one for-loop. Resist the temptation to add a "validate
+first, register second" pre-pass — `IrManifestSchema.parse` already
+runs ID-prefix and family-coherence refinements at parse time, so
+manifests that round-tripped through `IrManifestSchema.parse` cannot
+fail those checks here. The only failure mode left for parsed
+manifests is `DUPLICATE_ID`, and that one is intrinsically per-entry.
+
+For manifests passed in without going through the schema (e.g. a
+fixture literal in a test), `registry.register` re-runs the
+entry-level schema and the registry-level checks, so the throw
+surface is still the typed `AUDIO_IR.*` vocabulary.
+
+The helper does not call `setRegistrySizeSampler` itself — that
+happens once in `createIrRegistry`. The gauge therefore reflects the
+post-registration counts at every scrape after this call.

packages/media/audio-ir/audio-ir-core/src/registry/register-manifest.test.ts

@@ -0,0 +1,68 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { AUDIO_IR_CODES, AudioIrError } from "../error-codes/error-codes.js";
+import type { IrManifest } from "../types/manifest.js";
+import { registerManifest } from "./register-manifest.js";
+import { createIrRegistry } from "./registry.js";
+
+const ENTRY = (overrides: Record<string, unknown> = {}) => ({
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+    ...overrides,
+});
+
+describe("registerManifest", () => {
+    it("registers every entry in a well-formed manifest", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const eA = ENTRY({ id: "club-a" });
+        const eB = ENTRY({ id: "club-b" });
+        registerManifest(reg, {
+            packageSlug: "club",
+            family: "room",
+            entries: [eA, eB],
+        } as IrManifest);
+        expect(reg.has(eA.id)).toBe(true);
+        expect(reg.has(eB.id)).toBe(true);
+        const rooms = reg.list({ family: "room" });
+        expect(rooms.map((e) => e.id).sort()).toEqual(["club-a", "club-b"]);
+    });
+
+    it("leaves registry partially populated on mid-manifest failure", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const eA = ENTRY({ id: "club-a" });
+        const badEntry = ENTRY({ id: "other-1" });
+        const eC = ENTRY({ id: "club-c" });
+        let captured: AudioIrError | undefined;
+        try {
+            registerManifest(reg, {
+                packageSlug: "club",
+                family: "room",
+                entries: [eA, badEntry, eC],
+            } as IrManifest);
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.ID_PREFIX_MISMATCH);
+        expect(reg.has(eA.id)).toBe(true);
+        expect(reg.has(eC.id)).toBe(false);
+    });
+
+    it("an empty manifest leaves the registry empty", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        registerManifest(reg, {
+            packageSlug: "club",
+            family: "room",
+            entries: [],
+        } as unknown as IrManifest);
+        expect(reg.list()).toEqual([]);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/registry/register-manifest.ts

@@ -0,0 +1,24 @@
+import type { IrManifest } from "../types/manifest.js";
+import type { IrRegistry } from "./registry.js";
+
+/**
+ * Register every entry in `manifest` against `registry`.
+ *
+ * On any failure (`DUPLICATE_ID`, `ID_PREFIX_MISMATCH`,
+ * `FAMILY_MISMATCH`, or `INVALID_MANIFEST`) the helper rethrows the
+ * original `AudioIrError` verbatim WITHOUT rolling back prior
+ * registrations — the registry is allowed to be partially populated.
+ * Callers that need atomicity SHOULD use a fresh `createIrRegistry()`
+ * per attempt.
+ */
+export function registerManifest(
+    registry: IrRegistry,
+    manifest: IrManifest
+): void {
+    for (const entry of manifest.entries) {
+        registry.register(entry, {
+            manifestSlug: manifest.packageSlug,
+            manifestFamily: manifest.family,
+        });
+    }
+}

packages/media/audio-ir/audio-ir-core/src/registry/registry.md

@@ -0,0 +1,115 @@
+# `registry` — `createIrRegistry()` + `IrRegistry`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+In-memory `Map<string, IrManifestEntry>` registry — the central seam
+between content packages (which register entries) and the loader (which
+looks them up). The registry is the only place that enforces the
+runtime invariants the schema cannot: duplicate-id detection, ID-prefix
+coherence against the registering manifest, family coherence between
+entry and manifest, and the typed `AUDIO_IR.*` throw vocabulary. Every
+mutation drives the OTel surface (counters + observable gauge).
+
+The registry holds **manifest entries only**, not decoded
+`ImpulseResponse` values. Decoding happens lazily in
+`audio-ir-loader.load(id)` — keeping the registry data-only means
+content packages can be tree-shaken at the manifest level and decoders
+are pulled in only on demand. See `design.md` of the
+`add-audio-ir-core` change for the cross-cutting model.
+
+## Features
+
+- `createIrRegistry()` returns a fresh `IrRegistry` and installs a
+  per-family size sampler with the OTel module — the
+  `audio_ir.registry_size{family}` gauge reflects this registry's counts.
+- `register(entry, { manifestSlug, manifestFamily })` — validates the
+  entry, enforces ID-prefix + family-coherence, then inserts. Throws
+  `AUDIO_IR.INVALID_MANIFEST`, `AUDIO_IR.ID_PREFIX_MISMATCH`,
+  `AUDIO_IR.FAMILY_MISMATCH`, or `AUDIO_IR.DUPLICATE_ID` with typed
+  discriminants.
+- `has(id) / get(id)` — O(1) lookup. `get` throws
+  `AUDIO_IR.NOT_REGISTERED` when absent.
+- `list({ family? })` — stable insertion-order enumeration.
+- `clear()` — wipes state. Provided for tests.
+- Every throw increments `audio_ir.errors_total{code}` via
+  `recordError`. Every success increments
+  `audio_ir.registrations_total` / `audio_ir.lookups_total`.
+
+## Usage: Basic
+
+```ts
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+
+const registry = createIrRegistry();
+registry.register(
+    {
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://audio-ir-room-plugin-club/club1.wav",
+        channels: 2,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+    },
+    { manifestSlug: "club", manifestFamily: "room" }
+);
+console.log(registry.has("club-club1"));   // true
+console.log(registry.get("club-club1").id); // "club-club1"
+```
+
+## Usage: Advanced
+
+```ts
+import { AUDIO_IR_CODES, AudioIrError, createIrRegistry } from "@suaveplan/audio-ir-core";
+
+const registry = createIrRegistry();
+function safeRegister(entry: unknown, ctx: { manifestSlug: string; manifestFamily: "room" | "mic" | "speaker" }): "ok" | "duplicate" | "rejected" {
+    try {
+        registry.register(entry as Parameters<typeof registry.register>[0], ctx);
+        return "ok";
+    } catch (err) {
+        if (err instanceof AudioIrError) {
+            if (err.code === AUDIO_IR_CODES.DUPLICATE_ID) return "duplicate";
+            return "rejected";
+        }
+        throw err;
+    }
+}
+
+const rooms = registry.list({ family: "room" });
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `createIrRegistry()` | function | Build a fresh `IrRegistry` and install its size sampler. |
+| `IrRegistry` | interface | `register`, `has`, `get`, `list`, `clear` methods. |
+| `IrRegisterContext` | interface | `{ manifestSlug: string; manifestFamily: IrFamily }` — required at register time. |
+| `IrListOptions` | interface | `{ family?: IrFamily }` — optional list filter. |
+
+## Implementation Notes
+
+`register` re-runs `IrManifestEntrySchema.parse` on every input that
+isn't already frozen. This means content packages that hand-craft a
+`IrManifestEntry` literal still get the full grammar guarantees — the
+schema is the single source of truth. Frozen entries (already produced
+by `IrManifestSchema.parse` upstream) are inserted by reference so the
+spec's `registry.get(id) === entry` identity invariant holds.
+
+The registry maintains a private `familyCounts: Map<IrFamily, number>`
+on every `register` / `clear` and exposes it to the OTel observable
+gauge via the sampler hook installed in `createIrRegistry`. That keeps
+the gauge O(1) per scrape and impossible to drift from the actual
+registry state.
+
+`register` failures do NOT short-circuit on the first issue — Zod issues
+are walked, the family-coherence and id-prefix checks happen even when
+the schema accepted the entry (callers wiring through
+`IrManifestSchema.parse` already hit those refinements), and the duplicate
+check fires only when the entry would otherwise have been accepted.

packages/media/audio-ir/audio-ir-core/src/registry/registry.spec-conformance.test.ts

@@ -0,0 +1,99 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { AUDIO_IR_CODES, AudioIrError } from "../error-codes/error-codes.js";
+import { createIrRegistry } from "./registry.js";
+
+const E = (overrides: Record<string, unknown> = {}) => ({
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+    ...overrides,
+});
+
+const CTX = { manifestSlug: "club", manifestFamily: "room" as const };
+
+describe("IrRegistry spec-conformance", () => {
+    it("preserves insertion order under interleaved register / list", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const ids = ["club-a", "club-b", "club-c", "club-d", "club-e"];
+        for (const id of ids) {
+            reg.register(E({ id }), CTX);
+        }
+        expect(reg.list().map((e) => e.id)).toEqual(ids);
+        // Interleave: a partial list mid-insert.
+        const reg2 = createIrRegistry();
+        reg2.register(E({ id: "club-a" }), CTX);
+        const snapshot = reg2.list().map((e) => e.id);
+        reg2.register(E({ id: "club-b" }), CTX);
+        expect(snapshot).toEqual(["club-a"]);
+        expect(reg2.list().map((e) => e.id)).toEqual(["club-a", "club-b"]);
+    });
+
+    it("is idempotent under repeated has() without mutating order", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        reg.register(E({ id: "club-a" }), CTX);
+        reg.register(E({ id: "club-b" }), CTX);
+        for (let i = 0; i < 10; i++) {
+            expect(reg.has("club-a")).toBe(true);
+            expect(reg.has("club-b")).toBe(true);
+            expect(reg.has("missing")).toBe(false);
+        }
+        expect(reg.list().map((e) => e.id)).toEqual(["club-a", "club-b"]);
+    });
+
+    it("strict-mode: re-registering after DUPLICATE_ID throw leaves first registration intact", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const first = E({ id: "club-a" });
+        reg.register(first, CTX);
+        for (let i = 0; i < 3; i++) {
+            let captured: AudioIrError | undefined;
+            try {
+                reg.register(
+                    E({ id: "club-a", uri: `bundle://x/${i}.wav` }),
+                    CTX
+                );
+            } catch (err) {
+                if (err instanceof AudioIrError) captured = err;
+            }
+            expect(captured?.code).toBe(AUDIO_IR_CODES.DUPLICATE_ID);
+        }
+        expect(reg.get("club-a")).toBe(first);
+    });
+
+    it("list({ family }) is empty for a family with zero registrations", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        reg.register(E({ id: "club-a" }), CTX);
+        expect(reg.list({ family: "mic" })).toEqual([]);
+        expect(reg.list({ family: "speaker" })).toEqual([]);
+    });
+
+    it("clear is repeatable", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        reg.register(E({ id: "club-a" }), CTX);
+        reg.clear();
+        reg.clear();
+        expect(reg.list()).toEqual([]);
+    });
+
+    it("registering after clear works and resets per-family counts", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        reg.register(E({ id: "club-a" }), CTX);
+        reg.clear();
+        reg.register(E({ id: "club-a" }), CTX);
+        expect(reg.has("club-a")).toBe(true);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/registry/registry.test.ts

@@ -0,0 +1,193 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { AUDIO_IR_CODES, AudioIrError } from "../error-codes/error-codes.js";
+import { IrManifestEntrySchema } from "../types/manifest-entry.js";
+import { createIrRegistry } from "./registry.js";
+
+const E = (overrides: Record<string, unknown> = {}) => ({
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+    ...overrides,
+});
+
+const CTX = { manifestSlug: "club", manifestFamily: "room" as const };
+
+describe("IrRegistry", () => {
+    it("register then get returns the same frozen entry", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const entry = E();
+        reg.register(entry, CTX);
+        const got = reg.get(entry.id);
+        expect(got).toBe(entry);
+        expect(Object.isFrozen(got)).toBe(true);
+    });
+
+    it("register preserves identity for entries already parsed via the schema", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const entry = IrManifestEntrySchema.parse(E());
+        reg.register(entry, CTX);
+        expect(reg.get(entry.id)).toBe(entry);
+    });
+
+    it("throws DUPLICATE_ID on second register of same id", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const first = E();
+        reg.register(first, CTX);
+        const second = E({ uri: "bundle://x/other.wav" });
+        let captured: AudioIrError | undefined;
+        try {
+            reg.register(second, CTX);
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.DUPLICATE_ID);
+        expect(captured?.id).toBe("club-club1");
+        // First registration must remain.
+        expect(reg.get("club-club1")).toBe(first);
+    });
+
+    it("list filters by family in stable insertion order", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        const r1 = E({ id: "club-r1", family: "room" });
+        const m1 = E({
+            id: "sm57-m1",
+            family: "mic",
+        });
+        const r2 = E({ id: "club-r2", family: "room" });
+        const s1 = E({
+            id: "ns10-s1",
+            family: "speaker",
+        });
+        reg.register(r1, CTX);
+        reg.register(m1, {
+            manifestSlug: "sm57",
+            manifestFamily: "mic",
+        });
+        reg.register(r2, CTX);
+        reg.register(s1, {
+            manifestSlug: "ns10",
+            manifestFamily: "speaker",
+        });
+        const rooms = reg.list({ family: "room" });
+        expect(rooms.map((e) => e.id)).toEqual(["club-r1", "club-r2"]);
+        const all = reg.list();
+        expect(all.map((e) => e.id)).toEqual([
+            "club-r1",
+            "sm57-m1",
+            "club-r2",
+            "ns10-s1",
+        ]);
+    });
+
+    it("get throws NOT_REGISTERED for unknown id", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            reg.get("nope");
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.NOT_REGISTERED);
+        expect(captured?.id).toBe("nope");
+    });
+
+    it("clear empties the registry", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        const e = E();
+        reg.register(e, CTX);
+        expect(reg.has(e.id)).toBe(true);
+        reg.clear();
+        expect(reg.list()).toEqual([]);
+        expect(reg.has(e.id)).toBe(false);
+    });
+
+    it("has returns false for unknown id", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        expect(reg.has("nope")).toBe(false);
+    });
+
+    it("has returns true after register", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        const e = E();
+        reg.register(e, CTX);
+        expect(reg.has(e.id)).toBe(true);
+    });
+
+    it("throws ID_PREFIX_MISMATCH when entry id lacks slug prefix", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            reg.register(E({ id: "wrong-1" }), CTX);
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.ID_PREFIX_MISMATCH);
+        expect(captured?.expectedPrefix).toBe("club-");
+        expect(captured?.actualId).toBe("wrong-1");
+    });
+
+    it("throws FAMILY_MISMATCH when entry family disagrees with manifest", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            reg.register(E({ id: "club-x", family: "mic" }), CTX);
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.FAMILY_MISMATCH);
+        expect(captured?.manifestFamily).toBe("room");
+        expect(captured?.entryFamily).toBe("mic");
+    });
+
+    it("throws INVALID_MANIFEST when the entry shape is malformed", {
+        timeout: 5000,
+    }, () => {
+        const reg = createIrRegistry();
+        let captured: AudioIrError | undefined;
+        try {
+            reg.register(
+                E({ channels: -1 }) as unknown as Parameters<
+                    typeof reg.register
+                >[0],
+                CTX
+            );
+        } catch (err) {
+            if (err instanceof AudioIrError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_CODES.INVALID_MANIFEST);
+        expect(captured?.cause).toBeDefined();
+    });
+
+    it("validates the register context shape", { timeout: 5000 }, () => {
+        const reg = createIrRegistry();
+        expect(() =>
+            reg.register(E(), {
+                manifestSlug: "",
+                manifestFamily: "room",
+            } as unknown as typeof CTX)
+        ).toThrow();
+        expect(() =>
+            reg.register(E(), {
+                manifestSlug: "club",
+                manifestFamily: "bus",
+            } as unknown as typeof CTX)
+        ).toThrow();
+    });
+});

packages/media/audio-ir/audio-ir-core/src/registry/registry.ts

@@ -0,0 +1,210 @@
+import z from "zod";
+import { AUDIO_IR_CODES, AudioIrError } from "../error-codes/error-codes.js";
+import {
+    recordError,
+    recordLookup,
+    recordRegister,
+    setRegistrySizeSampler,
+} from "../otel/otel.js";
+import {
+    type IrFamily,
+    type IrManifestEntry,
+    IrManifestEntrySchema,
+} from "../types/manifest-entry.js";
+
+/**
+ * Cross-entry validation context the registry needs to enforce the
+ * id-prefix and family-coherence invariants when an entry is registered
+ * one-at-a-time (i.e. without going through `IrManifestSchema.parse`).
+ */
+export interface IrRegisterContext {
+    readonly manifestSlug: string;
+    readonly manifestFamily: IrFamily;
+}
+
+/** Optional filter for `IrRegistry.list({ family? })`. */
+export interface IrListOptions {
+    readonly family?: IrFamily;
+}
+
+/**
+ * In-memory `Map`-backed registry of `IrManifestEntry` values.
+ *
+ * Created via `createIrRegistry()`. See `design.md` of the
+ * `add-audio-ir-core` change for the cross-cutting model that explains
+ * why the registry holds manifest entries (not decoded IRs).
+ */
+export interface IrRegistry {
+    /**
+     * Validate `entry`, enforce ID-prefix + family coherence against
+     * `context`, then insert. Throws on every failure mode with a typed
+     * `AudioIrError`.
+     */
+    register(entry: IrManifestEntry, context: IrRegisterContext): void;
+    /** O(1) lookup. */
+    has(id: string): boolean;
+    /** O(1) lookup; throws `AUDIO_IR.NOT_REGISTERED` when absent. */
+    get(id: string): IrManifestEntry;
+    /** Stable insertion-order enumeration, optionally filtered by family. */
+    list(options?: IrListOptions): readonly IrManifestEntry[];
+    /** Reset internal state. Intended for test setups. */
+    clear(): void;
+}
+
+function throwAndRecord(err: AudioIrError): never {
+    recordError(err.code);
+    throw err;
+}
+
+/**
+ * Build a fresh `IrRegistry`. Every registry installs its own per-family
+ * size sampler with the OTel module so the `audio_ir.registry_size` gauge
+ * always reflects the most recently constructed registry's counts.
+ */
+export function createIrRegistry(): IrRegistry {
+    const store = new Map<string, IrManifestEntry>();
+    const familyCounts = new Map<IrFamily, number>([
+        ["mic", 0],
+        ["speaker", 0],
+        ["room", 0],
+    ]);
+
+    setRegistrySizeSampler(() => familyCounts);
+
+    function bumpFamily(family: IrFamily, delta: number): void {
+        // familyCounts is pre-seeded with all three families, so the
+        // get() is always defined — non-null assertion is safe here.
+        const current = familyCounts.get(family) as number;
+        familyCounts.set(family, current + delta);
+    }
+
+    function registerImpl(
+        entry: IrManifestEntry,
+        context: IrRegisterContext
+    ): void {
+        // Validate the entry shape first — re-runs the schema so callers
+        // that hand-craft an `IrManifestEntry` literal still get the same
+        // grammar guarantees as `IrManifestSchema.parse`. The validated
+        // entry reference is frozen in-place (Zod's `.transform` returns
+        // a new object, but `Object.freeze` is idempotent + identity-
+        // preserving) so the registry's `get(id) === entry` invariant
+        // holds across the parse + register round-trip.
+        let parsed: IrManifestEntry;
+        try {
+            if (!Object.isFrozen(entry)) {
+                IrManifestEntrySchema.parse(entry);
+                Object.freeze(entry);
+            }
+            parsed = entry;
+        } catch (cause) {
+            const err = new AudioIrError(
+                AUDIO_IR_CODES.INVALID_MANIFEST,
+                "audio_ir.invalid_manifest",
+                {
+                    cause,
+                    manifestSlug: context.manifestSlug,
+                    manifestFamily: context.manifestFamily,
+                }
+            );
+            throwAndRecord(err);
+        }
+        const prefix = `${context.manifestSlug}-`;
+        if (!parsed.id.startsWith(prefix)) {
+            throwAndRecord(
+                new AudioIrError(
+                    AUDIO_IR_CODES.ID_PREFIX_MISMATCH,
+                    "audio_ir.id_prefix_mismatch",
+                    {
+                        manifestSlug: context.manifestSlug,
+                        manifestFamily: context.manifestFamily,
+                        expectedPrefix: prefix,
+                        actualId: parsed.id,
+                        id: parsed.id,
+                    }
+                )
+            );
+        }
+        if (parsed.family !== context.manifestFamily) {
+            throwAndRecord(
+                new AudioIrError(
+                    AUDIO_IR_CODES.FAMILY_MISMATCH,
+                    "audio_ir.family_mismatch",
+                    {
+                        manifestSlug: context.manifestSlug,
+                        manifestFamily: context.manifestFamily,
+                        entryFamily: parsed.family,
+                        id: parsed.id,
+                    }
+                )
+            );
+        }
+        if (store.has(parsed.id)) {
+            throwAndRecord(
+                new AudioIrError(
+                    AUDIO_IR_CODES.DUPLICATE_ID,
+                    "audio_ir.duplicate_id",
+                    {
+                        id: parsed.id,
+                        manifestSlug: context.manifestSlug,
+                        manifestFamily: context.manifestFamily,
+                    }
+                )
+            );
+        }
+        store.set(parsed.id, parsed);
+        bumpFamily(parsed.family, 1);
+        recordRegister(parsed.family, "success");
+    }
+
+    return {
+        register(entry, context) {
+            // Light validation of the context shape — the registry must
+            // refuse to bind an entry into an arbitrary context.
+            const ctx = z
+                .object({
+                    manifestSlug: z.string().min(1),
+                    manifestFamily: z.enum(["mic", "speaker", "room"]),
+                })
+                .parse(context);
+            registerImpl(entry, ctx);
+        },
+        has(id) {
+            const entry = store.get(id);
+            if (entry === undefined) {
+                recordLookup("unknown", "miss", "has");
+                return false;
+            }
+            recordLookup(entry.family, "hit", "has");
+            return true;
+        },
+        get(id) {
+            const entry = store.get(id);
+            if (entry === undefined) {
+                recordLookup("unknown", "miss", "get");
+                const err = new AudioIrError(
+                    AUDIO_IR_CODES.NOT_REGISTERED,
+                    "audio_ir.not_registered",
+                    { id }
+                );
+                throwAndRecord(err);
+            }
+            recordLookup(entry.family, "hit", "get");
+            return entry;
+        },
+        list(options) {
+            const family = options?.family;
+            if (family === undefined) {
+                return Array.from(store.values());
+            }
+            return Array.from(store.values()).filter(
+                (entry) => entry.family === family
+            );
+        },
+        clear() {
+            store.clear();
+            familyCounts.set("mic", 0);
+            familyCounts.set("speaker", 0);
+            familyCounts.set("room", 0);
+        },
+    };
+}

packages/media/audio-ir/audio-ir-core/src/types/impulse-response.md

@@ -0,0 +1,98 @@
+# `types/impulse-response` — decoded `ImpulseResponse` schema
+
+## Purpose
+
+Defines the in-memory shape of a fully-decoded impulse response — the value
+`@suaveplan/audio-ir-loader.load(id)` returns and the convolver consumes.
+Decoded means there is no URI here, no I/O state, just channel buffers and
+the metadata needed to wire the IR into a Web Audio convolver or a Bun
+offline-render pipeline.
+
+The schema enforces three coherence rules a typed `interface` cannot:
+
+1. `channelData.length === channels`.
+2. Every `channelData[i].length === lengthFrames`.
+3. `durationSec === lengthFrames / sampleRate` (1 ms tolerance for FP).
+
+These rules are the contract between the loader (which decodes WAV/AIFF
+bytes into `Float32Array` channels) and the registry's `manifest`
+reference. Violating any of them is a loader bug, not a content bug, and
+the schema catches it at the seam.
+
+## Features
+
+- Custom `Float32Array` Zod brand — exhaustively validates the prototype.
+- Cross-field coherence via `.superRefine()` — channel count + frame count
+  - duration.
+- 1 ms tolerance on `durationSec` so floating-point IEEE-754 round-tripping
+  is safe.
+- `.transform(Object.freeze)` on the entire object (channelData included).
+- Every parsed value carries its source `manifest` entry, so consumers
+  walking a list of decoded IRs can still reach the provenance (license,
+  source) without a second registry lookup.
+
+## Usage: Basic
+
+```ts
+import { ImpulseResponseSchema } from "@suaveplan/audio-ir-core/types";
+
+const ir = ImpulseResponseSchema.parse({
+    id: "club-club1",
+    channelData: [new Float32Array([0.1, 0.2, 0.3])],
+    channels: 1,
+    sampleRate: 44100,
+    lengthFrames: 3,
+    durationSec: 3 / 44100,
+    gainDb: 0,
+    family: "room",
+    manifest: {
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://audio-ir-room-plugin-club/club1.wav",
+        channels: 1,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+    },
+});
+```
+
+## Usage: Advanced
+
+```ts
+import { ImpulseResponseSchema } from "@suaveplan/audio-ir-core/types";
+
+function assertConvolverCompatible(ir: unknown): void {
+    const parsed = ImpulseResponseSchema.parse(ir);
+    if (parsed.channels > 2) {
+        throw new Error(
+            `convolver supports 1..2 channels, got ${parsed.channels} for ${parsed.id}`
+        );
+    }
+}
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `ImpulseResponseSchema` | `ZodObject` | Strict, frozen, cross-field-coherent. |
+| `ImpulseResponse` | `type` | `z.infer<typeof ImpulseResponseSchema>`. |
+
+## Implementation Notes
+
+The schema lives in `audio-ir-core` rather than `audio-ir-loader` because
+the registry's `IrRegistry.get(id)` returns a `IrManifestEntry`, not an
+`ImpulseResponse` — the registry is intentionally data-only — but the
+loader's return-type contract is part of the foundation. Putting the
+schema here means content packages, test fixtures, and downstream
+convolver wrappers all parse through the same validator.
+
+`Float32Array` is brought in via `z.custom` rather than `z.instanceof`
+because the structural Zod check is cheaper and forward-compatible with
+SharedArrayBuffer-backed typed arrays.
+
+Channel buffers are NOT frozen individually (typed arrays are mutable by
+spec; freezing them yields a hard error in some runtimes). Freezing the
+top-level object is enough to prevent accidental wiring drift.

packages/media/audio-ir/audio-ir-core/src/types/impulse-response.test.ts

@@ -0,0 +1,146 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import z from "zod";
+import { ImpulseResponseSchema } from "./impulse-response.js";
+
+const validManifest = {
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 1,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+};
+
+const buf = (n: number) => Float32Array.from({ length: n }, (_, i) => i / n);
+
+const validIr = (overrides: Record<string, unknown> = {}) => ({
+    id: "club-club1",
+    channelData: [buf(441)],
+    channels: 1,
+    sampleRate: 44100,
+    lengthFrames: 441,
+    durationSec: 441 / 44100,
+    gainDb: 0,
+    family: "room" as const,
+    manifest: validManifest,
+    ...overrides,
+});
+
+describe("ImpulseResponseSchema", () => {
+    it("accepts a well-formed IR and freezes it", { timeout: 5000 }, () => {
+        const parsed = ImpulseResponseSchema.parse(validIr());
+        expect(parsed.lengthFrames).toBe(441);
+        expect(Object.isFrozen(parsed)).toBe(true);
+    });
+
+    it("rejects when channelData.length !== channels", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({
+                    channels: 2,
+                    channelData: [buf(441)],
+                })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects when a channel buffer length !== lengthFrames", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({
+                    channelData: [buf(100)],
+                })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects when durationSec disagrees with lengthFrames/sampleRate", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({
+                    durationSec: 1.0,
+                })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects a non-Float32Array channel buffer", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({
+                    channelData: [Array.from({ length: 441 }, () => 0)],
+                })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects an empty channel buffer", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({
+                    channelData: [new Float32Array(0)],
+                    lengthFrames: 1,
+                })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-positive durationSec", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(validIr({ durationSec: 0 }))
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-integer sampleRate", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(validIr({ sampleRate: 44100.5 }))
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-integer lengthFrames", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(validIr({ lengthFrames: 0.5 }))
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects empty id", { timeout: 5000 }, () => {
+        expect(() => ImpulseResponseSchema.parse(validIr({ id: "" }))).toThrow(
+            z.ZodError
+        );
+    });
+
+    it("rejects non-finite gainDb", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse(
+                validIr({ gainDb: Number.POSITIVE_INFINITY })
+            )
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects extra unknown properties (strict)", { timeout: 5000 }, () => {
+        expect(() =>
+            ImpulseResponseSchema.parse({ ...validIr(), bonus: true })
+        ).toThrow(z.ZodError);
+    });
+
+    it("accepts a stereo IR with matching channel buffers", {
+        timeout: 5000,
+    }, () => {
+        const parsed = ImpulseResponseSchema.parse(
+            validIr({
+                channels: 2,
+                channelData: [buf(441), buf(441)],
+            })
+        );
+        expect(parsed.channels).toBe(2);
+        expect(parsed.channelData.length).toBe(2);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/types/impulse-response.ts

@@ -0,0 +1,79 @@
+import z from "zod";
+import { IrFamilySchema, IrManifestEntrySchema } from "./manifest-entry.js";
+
+/** Zod schema for a single channel's Float32 PCM buffer. */
+const Float32ArraySchema = z
+    .custom<Float32Array>((v) => v instanceof Float32Array, {
+        message: "expected a Float32Array",
+    })
+    .refine((v) => v.length > 0, {
+        message: "channelData buffers must be non-empty",
+    });
+
+/**
+ * Zod schema for a fully-decoded impulse response.
+ *
+ * This is the value `audio-ir-loader.load(id)` returns and the value the
+ * convolver consumes. Decoded — no URI here, no manifest fields beyond the
+ * provenance `manifest` reference — so the schema is enough to validate
+ * any in-memory IR regardless of where it came from.
+ *
+ * The schema enforces channel-count coherence (`channelData.length ===
+ * channels`) and length coherence (`durationSec === lengthFrames /
+ * sampleRate` within a 1ms tolerance). Every parsed value is
+ * `Object.freeze`d.
+ */
+export const ImpulseResponseSchema = z
+    .object({
+        id: z.string().min(1),
+        channelData: z.array(Float32ArraySchema).readonly(),
+        channels: z
+            .number()
+            .int("channels must be an integer")
+            .min(1, "channels must be >= 1"),
+        sampleRate: z
+            .number()
+            .int("sampleRate must be an integer")
+            .min(1, "sampleRate must be >= 1"),
+        lengthFrames: z
+            .number()
+            .int("lengthFrames must be an integer")
+            .min(1, "lengthFrames must be >= 1"),
+        durationSec: z.number().positive("durationSec must be > 0"),
+        gainDb: z.number().finite("gainDb must be a finite number"),
+        family: IrFamilySchema,
+        manifest: IrManifestEntrySchema,
+    })
+    .strict()
+    .superRefine((ir, ctx) => {
+        if (ir.channelData.length !== ir.channels) {
+            ctx.addIssue({
+                code: z.ZodIssueCode.custom,
+                path: ["channelData"],
+                message: `channelData.length (${ir.channelData.length}) must equal channels (${ir.channels})`,
+            });
+        }
+        for (let i = 0; i < ir.channelData.length; i++) {
+            const buf = ir.channelData[i] as Float32Array;
+            if (buf.length !== ir.lengthFrames) {
+                ctx.addIssue({
+                    code: z.ZodIssueCode.custom,
+                    path: ["channelData", i],
+                    message: `channelData[${i}].length (${buf.length}) must equal lengthFrames (${ir.lengthFrames})`,
+                });
+            }
+        }
+        const expected = ir.lengthFrames / ir.sampleRate;
+        // 1ms tolerance — floating-point round-trip safety, not a soft cap.
+        if (Math.abs(expected - ir.durationSec) > 1e-3) {
+            ctx.addIssue({
+                code: z.ZodIssueCode.custom,
+                path: ["durationSec"],
+                message: `durationSec (${ir.durationSec}) must equal lengthFrames/sampleRate (${expected})`,
+            });
+        }
+    })
+    .transform((ir) => Object.freeze(ir));
+
+/** Static `ImpulseResponse` shape (frozen at runtime). */
+export type ImpulseResponse = z.infer<typeof ImpulseResponseSchema>;

packages/media/audio-ir/audio-ir-core/src/types/index.ts

@@ -0,0 +1,16 @@
+export {
+    type ImpulseResponse,
+    ImpulseResponseSchema,
+} from "./impulse-response.js";
+export {
+    type IrManifest,
+    IrManifestSchema,
+    IrManifestSlugSchema,
+} from "./manifest.js";
+export {
+    IrEntryIdSchema,
+    type IrFamily,
+    IrFamilySchema,
+    type IrManifestEntry,
+    IrManifestEntrySchema,
+} from "./manifest-entry.js";

packages/media/audio-ir/audio-ir-core/src/types/manifest-entry.md

@@ -0,0 +1,91 @@
+# `types/manifest-entry` — `IrManifestEntry` Zod schema
+
+## Purpose
+
+Defines the on-the-wire shape of a single entry inside an `IrManifest`. An
+entry is the smallest unit a content package contributes through the
+manifest-first contract: one IR file's identity (`id`), classification
+(`family`), location (`uri`), audio shape (`channels`, `sampleRate`),
+loudness offset (`gainDb`), and provenance (`license`, `source`). The
+schema is the canonical validator at every boundary; every other module
+parses through it before trusting the data.
+
+The `id` grammar is the foundation of the registry's collision discipline
+and the OTel attribute vocabulary. Lower-kebab, letter-led, no consecutive
+dashes, 1..128 bytes — that bound keeps ids safe as Map keys, span
+attributes, file-system path segments, and CSS class names. The schema
+also freezes every parsed entry, so callers cannot mutate the registry
+view by mutating the entry they got back.
+
+## Features
+
+- Exported `IrFamilySchema` (Zod enum) + `IrFamily` static type — the
+  closed `"mic" | "speaker" | "room"` union the entire family uses.
+- Exported `IrEntryIdSchema` as a standalone primitive, reusable wherever
+  an id needs to be validated outside an entry context.
+- `IrManifestEntrySchema` is `.strict()` — extra properties are rejected,
+  which prevents accidental schema drift between content packages.
+- Every parsed entry is `Object.freeze`d via `.transform()`.
+
+## Usage: Basic
+
+```ts
+import { IrManifestEntrySchema } from "@suaveplan/audio-ir-core/types";
+
+const entry = IrManifestEntrySchema.parse({
+    id: "club-club1",
+    family: "room",
+    uri: "bundle://audio-ir-room-plugin-club/club1.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+});
+// `entry` is frozen and deep-equal to the input.
+```
+
+## Usage: Advanced
+
+```ts
+import { IrEntryIdSchema, IrFamilySchema } from "@suaveplan/audio-ir-core/types";
+
+// Use the primitive standalone where only the id grammar is relevant —
+// e.g. CLI option parsing for the loader.
+function parseIdArg(raw: string): string {
+    return IrEntryIdSchema.parse(raw);
+}
+
+// Family enum is reusable for filter UIs.
+function buildFamilyFilter(): readonly string[] {
+    return IrFamilySchema.options;
+}
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `IrFamilySchema` | `ZodEnum` | `["mic", "speaker", "room"]`. |
+| `IrFamily` | `type` | `"mic" \| "speaker" \| "room"`. |
+| `IrEntryIdSchema` | `ZodString` | Refined string: 1..128 bytes, lower-kebab, letter-led, no `--`. |
+| `IrManifestEntrySchema` | `ZodObject` | Strict object with `.transform(Object.freeze)`. |
+| `IrManifestEntry` | `type` | `z.infer<typeof IrManifestEntrySchema>`. |
+
+## Implementation Notes
+
+The id grammar is enforced with two `.refine()` passes (regex shape, then
+consecutive-dash check) rather than a single fused regex so each violation
+maps to its own Zod issue with a specific message. That matters for the
+DX when manifests are malformed at scale — operators get a precise
+finger-pointing message instead of a single opaque regex failure.
+
+`.strict()` is intentional: a future MODIFIED-Requirements change can grow
+the schema (e.g. `metadata?: Record<string, unknown>`) but until that ships
+we reject unknown fields outright. That keeps content packages from
+encoding bespoke extensions that bypass the manifest-first discipline.
+
+`gainDb` uses `.finite()` (rejecting `NaN`/`Infinity`) but not `.safe()` —
+loudness deltas can legitimately be negative double-digits and we want to
+preserve their numeric semantics. The loader downstream is responsible for
+clipping into a sensible playback range.

packages/media/audio-ir/audio-ir-core/src/types/manifest-entry.test.ts

@@ -0,0 +1,145 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import z from "zod";
+import {
+    IrEntryIdSchema,
+    IrFamilySchema,
+    IrManifestEntrySchema,
+} from "./manifest-entry.js";
+
+const baseEntry = {
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+};
+
+describe("IrManifestEntrySchema", () => {
+    it("valid entry round-trips through Zod and is frozen", {
+        timeout: 5000,
+    }, () => {
+        const parsed = IrManifestEntrySchema.parse(baseEntry);
+        expect(parsed).toEqual(baseEntry);
+        expect(Object.isFrozen(parsed)).toBe(true);
+    });
+
+    it("rejects uppercase / consecutive-dash / non-letter-start ids", {
+        timeout: 5000,
+    }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, id: "Club1" })
+        ).toThrow(z.ZodError);
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, id: "club--1" })
+        ).toThrow(z.ZodError);
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, id: "1-club" })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects an empty id", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, id: "" })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects an id longer than 128 bytes", { timeout: 5000 }, () => {
+        const tooLong = `a${"b".repeat(128)}`;
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, id: tooLong })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects an empty uri", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, uri: "" })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-integer channels", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, channels: 1.5 })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects channels < 1", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, channels: 0 })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-integer sampleRate", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, sampleRate: 44.1 })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects sampleRate < 1", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, sampleRate: 0 })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects non-finite gainDb", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({
+                ...baseEntry,
+                gainDb: Number.POSITIVE_INFINITY,
+            })
+        ).toThrow(z.ZodError);
+        expect(() =>
+            IrManifestEntrySchema.parse({
+                ...baseEntry,
+                gainDb: Number.NaN,
+            })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects empty license / source", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, license: "" })
+        ).toThrow(z.ZodError);
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, source: "" })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects extra unknown properties (strict)", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestEntrySchema.parse({ ...baseEntry, extraField: "nope" })
+        ).toThrow(z.ZodError);
+    });
+
+    it("accepts the boundary-length 128-byte id", { timeout: 5000 }, () => {
+        const longId = `a${"b".repeat(127)}`;
+        expect(longId.length).toBe(128);
+        const parsed = IrManifestEntrySchema.parse({
+            ...baseEntry,
+            id: longId,
+        });
+        expect(parsed.id).toBe(longId);
+    });
+});
+
+describe("IrEntryIdSchema standalone", () => {
+    it("accepts a single letter", { timeout: 5000 }, () => {
+        expect(IrEntryIdSchema.parse("a")).toBe("a");
+    });
+    it("rejects raw uppercase", { timeout: 5000 }, () => {
+        expect(() => IrEntryIdSchema.parse("A")).toThrow(z.ZodError);
+    });
+});
+
+describe("IrFamilySchema enum", () => {
+    it("accepts the three known families", { timeout: 5000 }, () => {
+        expect(IrFamilySchema.parse("mic")).toBe("mic");
+        expect(IrFamilySchema.parse("speaker")).toBe("speaker");
+        expect(IrFamilySchema.parse("room")).toBe("room");
+    });
+    it("rejects unknown families", { timeout: 5000 }, () => {
+        expect(() => IrFamilySchema.parse("bus")).toThrow(z.ZodError);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/types/manifest-entry.ts

@@ -0,0 +1,60 @@
+import z from "zod";
+
+/** IR family discriminator — `mic`, `speaker`, or `room`. */
+export const IrFamilySchema = z.enum(["mic", "speaker", "room"]);
+
+/** Static IR family union. */
+export type IrFamily = z.infer<typeof IrFamilySchema>;
+
+/**
+ * Zod schema for `IrManifestEntry.id`.
+ *
+ * Grammar:
+ *
+ *  - SHALL match `/^[a-z][a-z0-9-]*$/` (lower-kebab, letter-led).
+ *  - SHALL NOT contain consecutive `-` characters.
+ *  - SHALL be 1..128 bytes long.
+ *
+ * The grammar is enforced as a top-level refinement so we can return a
+ * specific issue per violation rather than a single opaque regex error.
+ */
+export const IrEntryIdSchema = z
+    .string()
+    .min(1, "id must be at least 1 character")
+    .max(128, "id must be at most 128 characters")
+    .refine((s) => /^[a-z][a-z0-9-]*$/.test(s), {
+        message:
+            "id must match /^[a-z][a-z0-9-]*$/ — lowercase, letter-led, kebab",
+    })
+    .refine((s) => !s.includes("--"), {
+        message: "id must not contain consecutive `-`",
+    });
+
+/**
+ * Zod schema for an entry inside an `IrManifest`.
+ *
+ * Every parsed entry is `Object.freeze`d before being returned so callers
+ * cannot mutate the registry view by mutating the entry they got back.
+ */
+export const IrManifestEntrySchema = z
+    .object({
+        id: IrEntryIdSchema,
+        family: IrFamilySchema,
+        uri: z.string().min(1, "uri must be a non-empty string"),
+        channels: z
+            .number()
+            .int("channels must be an integer")
+            .min(1, "channels must be >= 1"),
+        sampleRate: z
+            .number()
+            .int("sampleRate must be an integer")
+            .min(1, "sampleRate must be >= 1"),
+        gainDb: z.number().finite("gainDb must be a finite number"),
+        license: z.string().min(1, "license must be a non-empty string"),
+        source: z.string().min(1, "source must be a non-empty string"),
+    })
+    .strict()
+    .transform((parsed) => Object.freeze(parsed));
+
+/** Static `IrManifestEntry` shape (frozen at runtime). */
+export type IrManifestEntry = z.infer<typeof IrManifestEntrySchema>;

packages/media/audio-ir/audio-ir-core/src/types/manifest.md

@@ -0,0 +1,97 @@
+# `types/manifest` — `IrManifest` Zod schema
+
+## Purpose
+
+Defines the on-the-wire shape of a complete IR manifest — the package-level
+contract a content package (e.g. `audio-ir-room-plugin-club`) ships so the
+registry knows which entries belong together, which slug-prefix to enforce,
+and which family to denormalise onto each entry. Every other component in
+the IR pipeline (loader, registry helper, UI filters) parses through this
+schema before trusting the data.
+
+The schema enforces two cross-entry invariants that the entry-level schema
+cannot express by itself: id-prefix coherence and family coherence. Both
+violations surface as `ZodError` issues with a machine-readable `params`
+payload (`{ kind: "ID_PREFIX_MISMATCH" | "FAMILY_MISMATCH", ... }`) so the
+registry layer can rewrap them as typed `AudioIrError` throws without
+parsing the message string. The cross-cutting design lives in `design.md`
+of the spec change.
+
+## Features
+
+- Exported `IrManifestSlugSchema` standalone — reusable wherever a slug
+  needs validating (CLI args, plugin manifests).
+- `.strict()` object — extra properties on the manifest rejected outright.
+- Cross-entry refinements via `.superRefine()` so multiple issues from one
+  parse run surface as multiple Zod issues, not the first-failure-wins.
+- `.transform(Object.freeze)` — every parsed manifest is frozen.
+
+## Usage: Basic
+
+```ts
+import { IrManifestSchema } from "@suaveplan/audio-ir-core/types";
+
+const manifest = IrManifestSchema.parse({
+    packageSlug: "club",
+    family: "room",
+    entries: [
+        {
+            id: "club-club1",
+            family: "room",
+            uri: "bundle://audio-ir-room-plugin-club/club1.wav",
+            channels: 2,
+            sampleRate: 44100,
+            gainDb: 0,
+            license: "MIT",
+            source: "demo",
+        },
+    ],
+});
+```
+
+## Usage: Advanced
+
+```ts
+import { IrManifestSchema } from "@suaveplan/audio-ir-core/types";
+
+const result = IrManifestSchema.safeParse(untrustedInput);
+if (!result.success) {
+    for (const issue of result.error.issues) {
+        const kind = (issue.params as { kind?: string } | undefined)?.kind;
+        if (kind === "ID_PREFIX_MISMATCH") {
+            const params = issue.params as {
+                expectedPrefix: string;
+                actualId: string;
+            };
+            console.error(
+                `entry id "${params.actualId}" should start with "${params.expectedPrefix}"`
+            );
+        }
+    }
+}
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `IrManifestSlugSchema` | `ZodString` | Lower-kebab, letter-led, no `--`, 1..64 bytes. |
+| `IrManifestSchema` | `ZodObject` | Strict manifest with `superRefine` + freeze transform. |
+| `IrManifest` | `type` | `z.infer<typeof IrManifestSchema>`. |
+
+## Implementation Notes
+
+The slug grammar is capped at 64 bytes — half the entry id cap — because
+the slug + dash + filename stem all live inside a single 128-byte id and
+the filename stem deserves at least 63 bytes of headroom for descriptive
+names like `outdoor-swimming-pool`.
+
+`superRefine` is used over `refine` because we want every entry's
+violations reported in the same `ZodError`, not just the first. That makes
+authoring a content-package manifest much faster — fix the whole batch in
+one round-trip instead of one issue at a time.
+
+The custom-issue `params.kind` discriminant (`"ID_PREFIX_MISMATCH"` /
+`"FAMILY_MISMATCH"`) is the contract the registry layer parses to decide
+which `AudioIrError` code to throw. The keys are intentionally identical
+to the `AUDIO_IR.*` reason names so the wiring is mechanical.

packages/media/audio-ir/audio-ir-core/src/types/manifest.test.ts

@@ -0,0 +1,124 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import z from "zod";
+import { IrManifestSchema, IrManifestSlugSchema } from "./manifest.js";
+
+const entry = (overrides: Record<string, unknown> = {}) => ({
+    id: "club-club1",
+    family: "room" as const,
+    uri: "bundle://x/y.wav",
+    channels: 2,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+    ...overrides,
+});
+
+describe("IrManifestSchema", () => {
+    it("accepts a well-formed manifest and freezes it", {
+        timeout: 5000,
+    }, () => {
+        const manifest = IrManifestSchema.parse({
+            packageSlug: "club",
+            family: "room",
+            entries: [entry(), entry({ id: "club-club2" })],
+        });
+        expect(manifest.entries.length).toBe(2);
+        expect(Object.isFrozen(manifest)).toBe(true);
+    });
+
+    it("rejects entry whose id lacks the manifest slug prefix", {
+        timeout: 5000,
+    }, () => {
+        let captured: z.ZodError | undefined;
+        try {
+            IrManifestSchema.parse({
+                packageSlug: "club",
+                family: "room",
+                entries: [entry({ id: "wrong-1" })],
+            });
+        } catch (err) {
+            captured = err as z.ZodError;
+        }
+        expect(captured).toBeInstanceOf(z.ZodError);
+        const issue = captured?.issues.find(
+            (i) =>
+                (i.params as { kind?: string } | undefined)?.kind ===
+                "ID_PREFIX_MISMATCH"
+        );
+        expect(issue).toBeDefined();
+        const params = issue?.params as {
+            expectedPrefix: string;
+            actualId: string;
+        };
+        expect(params.expectedPrefix).toBe("club-");
+        expect(params.actualId).toBe("wrong-1");
+    });
+
+    it("rejects entry whose family disagrees with manifest family", {
+        timeout: 5000,
+    }, () => {
+        let captured: z.ZodError | undefined;
+        try {
+            IrManifestSchema.parse({
+                packageSlug: "club",
+                family: "room",
+                entries: [entry({ id: "club-club1", family: "mic" })],
+            });
+        } catch (err) {
+            captured = err as z.ZodError;
+        }
+        expect(captured).toBeInstanceOf(z.ZodError);
+        const issue = captured?.issues.find(
+            (i) =>
+                (i.params as { kind?: string } | undefined)?.kind ===
+                "FAMILY_MISMATCH"
+        );
+        expect(issue).toBeDefined();
+        const params = issue?.params as {
+            manifestFamily: string;
+            entryFamily: string;
+        };
+        expect(params.manifestFamily).toBe("room");
+        expect(params.entryFamily).toBe("mic");
+    });
+
+    it("rejects an unknown top-level property", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestSchema.parse({
+                packageSlug: "club",
+                family: "room",
+                entries: [entry()],
+                rogue: "field",
+            })
+        ).toThrow(z.ZodError);
+    });
+
+    it("rejects empty packageSlug", { timeout: 5000 }, () => {
+        expect(() =>
+            IrManifestSchema.parse({
+                packageSlug: "",
+                family: "room",
+                entries: [],
+            })
+        ).toThrow(z.ZodError);
+    });
+});
+
+describe("IrManifestSlugSchema", () => {
+    it("accepts a kebab slug", { timeout: 5000 }, () => {
+        expect(IrManifestSlugSchema.parse("audio-ir-club")).toBe(
+            "audio-ir-club"
+        );
+    });
+    it("rejects uppercase", { timeout: 5000 }, () => {
+        expect(() => IrManifestSlugSchema.parse("Club")).toThrow(z.ZodError);
+    });
+    it("rejects consecutive dashes", { timeout: 5000 }, () => {
+        expect(() => IrManifestSlugSchema.parse("a--b")).toThrow(z.ZodError);
+    });
+    it("rejects slug longer than 64 bytes", { timeout: 5000 }, () => {
+        const tooLong = `a${"b".repeat(64)}`;
+        expect(() => IrManifestSlugSchema.parse(tooLong)).toThrow(z.ZodError);
+    });
+});

packages/media/audio-ir/audio-ir-core/src/types/manifest.ts

@@ -0,0 +1,90 @@
+import z from "zod";
+import {
+    type IrFamily,
+    IrFamilySchema,
+    IrManifestEntrySchema,
+} from "./manifest-entry.js";
+
+/**
+ * Zod schema for `IrManifest.packageSlug`.
+ *
+ * Grammar mirrors `IrEntryIdSchema` (lower-kebab, letter-led, no
+ * consecutive `-`, 1..64 bytes). 64 bytes is the upper bound because the
+ * slug is concatenated as `<slug>-<rest>` into the entry id, which is
+ * itself capped at 128.
+ */
+export const IrManifestSlugSchema = z
+    .string()
+    .min(1, "packageSlug must be at least 1 character")
+    .max(64, "packageSlug must be at most 64 characters")
+    .refine((s) => /^[a-z][a-z0-9-]*$/.test(s), {
+        message:
+            "packageSlug must match /^[a-z][a-z0-9-]*$/ — lowercase, letter-led, kebab",
+    })
+    .refine((s) => !s.includes("--"), {
+        message: "packageSlug must not contain consecutive `-`",
+    });
+
+interface ManifestShape {
+    readonly packageSlug: string;
+    readonly family: IrFamily;
+    readonly entries: ReadonlyArray<z.infer<typeof IrManifestEntrySchema>>;
+}
+
+/**
+ * Zod schema for a complete `IrManifest`.
+ *
+ * The schema refines the parsed value with two invariants:
+ *
+ *  1. Every `entry.id` SHALL begin with `<packageSlug>-` (case-sensitive).
+ *  2. Every `entry.family` SHALL equal `manifest.family`.
+ *
+ * Violations surface as `ZodError` issues with `code: "custom"` and a
+ * machine-readable `params` payload so the registry can rewrap them as
+ * `AUDIO_IR.ID_PREFIX_MISMATCH` / `AUDIO_IR.FAMILY_MISMATCH` without
+ * regex-parsing the message text.
+ */
+export const IrManifestSchema = z
+    .object({
+        packageSlug: IrManifestSlugSchema,
+        family: IrFamilySchema,
+        entries: z.array(IrManifestEntrySchema).readonly(),
+    })
+    .strict()
+    .superRefine((manifest, ctx) => {
+        const prefix = `${manifest.packageSlug}-`;
+        for (let i = 0; i < manifest.entries.length; i++) {
+            const entry = manifest.entries[i] as z.infer<
+                typeof IrManifestEntrySchema
+            >;
+            if (!entry.id.startsWith(prefix)) {
+                ctx.addIssue({
+                    code: z.ZodIssueCode.custom,
+                    path: ["entries", i, "id"],
+                    message: `id "${entry.id}" must start with manifest slug prefix "${prefix}"`,
+                    params: {
+                        kind: "ID_PREFIX_MISMATCH",
+                        expectedPrefix: prefix,
+                        actualId: entry.id,
+                    },
+                });
+            }
+            if (entry.family !== manifest.family) {
+                ctx.addIssue({
+                    code: z.ZodIssueCode.custom,
+                    path: ["entries", i, "family"],
+                    message: `entry.family "${entry.family}" must equal manifest.family "${manifest.family}"`,
+                    params: {
+                        kind: "FAMILY_MISMATCH",
+                        manifestFamily: manifest.family,
+                        entryFamily: entry.family,
+                        id: entry.id,
+                    },
+                });
+            }
+        }
+    })
+    .transform((manifest): ManifestShape => Object.freeze(manifest));
+
+/** Static `IrManifest` shape (frozen at runtime). */
+export type IrManifest = z.infer<typeof IrManifestSchema>;

packages/media/audio-ir/audio-ir-core/tsconfig.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": ".",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts"],
+    "exclude": ["dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-core/tsconfig.lib.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": "./src",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts"],
+    "exclude": ["src/**/*.test.ts", "dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-core/vite.config.ts

@@ -0,0 +1,44 @@
+import { defineConfig } from "vite";
+import dts from "vite-plugin-dts";
+
+export default defineConfig({
+    root: __dirname,
+    cacheDir: "../../../node_modules/.vite/packages/audio-ir-core",
+    plugins: [
+        dts({
+            entryRoot: "src",
+            tsconfigPath: "./tsconfig.lib.json",
+            insertTypesEntry: true,
+        }),
+    ],
+    build: {
+        outDir: "./dist",
+        emptyOutDir: true,
+        reportCompressedSize: true,
+        sourcemap: true,
+        lib: {
+            entry: {
+                index: "src/index.ts",
+                "registrar/index": "src/registrar/index.ts",
+            },
+            formats: ["es"],
+        },
+        rollupOptions: {
+            treeshake: true,
+            output: {
+                preserveModules: true,
+                preserveModulesRoot: "src",
+                entryFileNames: "[name].js",
+            },
+            external: [
+                "@opentelemetry/api",
+                "@suaveplan/error",
+                "@suaveplan/opentelemetry",
+                "@suaveplan/storage-uri",
+                "@suaveplan/types",
+                "tslib",
+                "zod",
+            ],
+        },
+    },
+});

packages/media/audio-ir/audio-ir-core/vitest.config.ts

@@ -0,0 +1,5 @@
+import { createTestConfig } from "@suaveplan/testing/config";
+
+export default createTestConfig({
+    testTimeout: 30000,
+});

packages/media/audio-ir/audio-ir-loader/README.md

@@ -0,0 +1,79 @@
+# @suaveplan/audio-ir-loader - Pipeline package for the @suaveplan audio-ir family: composes IrRegistry → StorageUriResolver → AudioDecoder → manifest validation into a single createIrLoader(). Universal.
+
+Pipeline package for the `@suaveplan/audio-ir-*` family. Composes
+`IrRegistry` (from `@suaveplan/audio-ir-core`), a `StorageUriResolver`
+(from `@suaveplan/storage-uri`), and a map of `AudioDecoder`s into a
+single `IrLoader` with `load`, `preload`, `evict`, and `cacheStats`.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [cache](./src/cache/cache.md) — This module implements the in-process LRU that backs the loader's optional cache. The cache is keyed by IR id and bound…
+  - [cache](./src/cache/cache.md) — This module implements the in-process LRU that backs the loader's optional cache. The cache is keyed by IR id and bound…
+- [error-codes](./src/error-codes/error-codes.md) — This module is the single source of truth for every error code raised by `@suaveplan/audio-ir-loader`. It uses `defineC…
+  - [error-codes](./src/error-codes/error-codes.md) — This module is the single source of truth for every error code raised by `@suaveplan/audio-ir-loader`. It uses `defineC…
+- [loader](./src/loader/loader.md) — This module is the entry point for the package. `createIrLoader(options)` returns a typed `IrLoader` that composes the…
+  - [extension](./src/loader/extension.md) — The loader dispatches decoders by file extension. This module owns the canonicalisation step: given a URI string (which…
+  - [loader](./src/loader/loader.md) — This module is the entry point for the package. `createIrLoader(options)` returns a typed `IrLoader` that composes the…
+  - [manifest-validation](./src/loader/manifest-validation.md) — This module is the bridge between the `DecodedAudio` shape emitted by an `AudioDecoder` and the `ImpulseResponse` shape…
+  - [preload](./src/loader/preload.md) — This module implements the bounded-concurrency `preload` algorithm backing `IrLoader.preload`. It launches up to `concu…
+- [otel](./src/otel/otel.md) — This module owns the loader's OpenTelemetry instrumentation. It lazily builds a single, cached `AudioIrLoaderInstrument…
+  - [otel](./src/otel/otel.md) — This module owns the loader's OpenTelemetry instrumentation. It lazily builds a single, cached `AudioIrLoaderInstrument…
+<!-- end:auto-docs -->
+
+## What ships
+
+- `createIrLoader(options): IrLoader` — Zod-validated factory.
+- Bounded-concurrency `preload(ids, { concurrency })` with aggregate
+  failure reporting.
+- Optional in-process byte-bounded LRU cache.
+- `AUDIO_IR_LOADER.*` error-code registry — exactly six codes
+  (`DECODER_UNAVAILABLE`, `MANIFEST_MISMATCH`, `ABORTED`,
+  `CACHE_OVERFLOW`, `DECODE_FAILED`, `RESOLVE_FAILED`).
+- OpenTelemetry surface — `audio_ir_loader.load_duration_ms`,
+  `audio_ir_loader.bytes_read_total`, `audio_ir_loader.frames_out_total`,
+  `audio_ir_loader.cache_hits_total`, `audio_ir_loader.cache_misses_total`,
+  `audio_ir_loader.errors_total`.
+
+## Modules
+
+| Module | Subpath | Docs |
+| --- | --- | --- |
+| Error codes | `./error-codes` | [`src/error-codes/error-codes.md`](./src/error-codes/error-codes.md) |
+| OTel surface | (root) | [`src/otel/otel.md`](./src/otel/otel.md) |
+| LRU cache | (root) | [`src/cache/cache.md`](./src/cache/cache.md) |
+| `createIrLoader` | (root) | [`src/loader/loader.md`](./src/loader/loader.md) |
+| `extractExtension` | (root) | [`src/loader/extension.md`](./src/loader/extension.md) |
+| Manifest validation | (root) | [`src/loader/manifest-validation.md`](./src/loader/manifest-validation.md) |
+| Bounded `preload` | (root) | [`src/loader/preload.md`](./src/loader/preload.md) |
+
+## Design
+
+The pipeline + dispatch + cache decisions live at
+
+the cross-cutting IR-family model lives at
+
+
+## Quick install
+
+```ts
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { bundleUriPlugin } from "@suaveplan/storage-uri-plugin-bundle";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+
+const resolver = createStorageUriResolver([
+    bundleUriPlugin({
+        packageSlug: "club",
+        rootUrl: new URL("file:///opt/ir/club/"),
+    }),
+]);
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav },
+    cache: { maxBytes: 64 * 1024 * 1024 },
+});
+const ir = await loader.load("club-club1");
+```
+

packages/media/audio-ir/audio-ir-loader/package.json

@@ -0,0 +1,70 @@
+{
+    "name": "@suaveplan/audio-ir-loader",
+    "version": "0.1.0",
+    "type": "module",
+    "sideEffects": false,
+    "description": "Pipeline package for the @suaveplan audio-ir family: composes IrRegistry → StorageUriResolver → AudioDecoder → manifest validation into a single createIrLoader(). Universal.",
+    "license": "MIT",
+    "author": "Suaveplan Team",
+    "main": "./dist/index.js",
+    "module": "./dist/index.js",
+    "types": "./dist/index.d.ts",
+    "exports": {
+        "./package.json": "./package.json",
+        ".": {
+            "import": {
+                "types": "./dist/index.d.ts",
+                "default": "./dist/index.js"
+            }
+        },
+        "./error-codes": {
+            "import": {
+                "types": "./dist/error-codes/error-codes.d.ts",
+                "default": "./dist/error-codes/error-codes.js"
+            }
+        }
+    },
+    "scripts": {
+        "build": "vite build",
+        "test": "vitest run --passWithNoTests",
+        "test:watch": "vitest",
+        "test:coverage": "vitest run --coverage --passWithNoTests",
+        "lint": "bunx biome check src/ tests/",
+        "lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/ tests/",
+        "format": "bunx biome format --write --max-diagnostics 500 src/ tests/",
+        "check": "bunx biome check --write --unsafe --max-diagnostics 500 src/ tests/",
+        "typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
+        "docs:check": "bun run ../../../../scripts/docs-check.ts ."
+    },
+    "dependencies": {
+        "@opentelemetry/api": "catalog:observability",
+        "@suaveplan/audio-ir-core": "workspace:^",
+        "@suaveplan/error": "workspace:^",
+        "@suaveplan/opentelemetry": "workspace:^",
+        "@suaveplan/storage-uri": "workspace:^",
+        "@suaveplan/types": "workspace:^",
+        "tslib": "catalog:build",
+        "zod": "catalog:forms"
+    },
+    "devDependencies": {
+        "@suaveplan/audio-decode-wav": "workspace:^",
+        "@suaveplan/storage-uri-plugin-bundle": "workspace:^",
+        "@suaveplan/storage-uri-plugin-fallback": "workspace:^",
+        "@suaveplan/testing": "workspace:^",
+        "@types/node": "catalog:",
+        "@vitest/coverage-istanbul": "catalog:testing",
+        "typescript": "catalog:",
+        "vite": "catalog:build",
+        "vite-plugin-dts": "catalog:build",
+        "vitest": "catalog:testing"
+    },
+    "publishConfig": {
+        "registry": "https://npmjs.fq.io/",
+        "access": "public"
+    },
+    "files": [
+        "dist",
+        "src",
+        "README.md"
+    ]
+}

packages/media/audio-ir/audio-ir-loader/src/cache/cache.md

@@ -0,0 +1,101 @@
+# `cache.ts` — byte-bounded LRU for decoded `ImpulseResponse`s
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module implements the in-process LRU that backs the loader's optional
+cache. The cache is keyed by IR id and bounded by total decoded bytes —
+not entry count — because IRs vary wildly in size (a 1-second mic IR vs.
+a 10-second cathedral room IR can differ by 100x) and a count-based budget
+gives unpredictable memory behaviour. Eviction is oldest-by-insertion, not
+oldest-by-access, because IRs are typically loaded once at app start and
+then held for the session: insertion-time eviction is both simpler and
+gives more predictable memory occupancy than the LRU-by-touch variant.
+
+## Features
+
+- Byte-bounded budget (`maxBytes`) with strict enforcement.
+- Single-IR `CACHE_OVERFLOW` throw rather than thrashing the rest of the
+  cache to fit one oversized IR.
+- Hit / miss counters surfaced via `stats()` for `IrLoader.cacheStats()`.
+- Updates over an existing id replace in-place (and re-budget).
+
+## Usage: Basic
+
+```ts
+import { ImpulseResponseCache } from "@suaveplan/audio-ir-loader";
+
+const cache = new ImpulseResponseCache(1024 * 1024);
+cache.put("club-club1", ir);
+const hit = cache.get("club-club1"); // === ir
+console.log(cache.stats()); // { entries: 1, bytes: ..., hits: 1, misses: 0 }
+```
+
+## Usage: Advanced
+
+The eviction loop is deterministic: `Map.keys()` enumerates insertion
+order, so callers can reason about exactly which entry will be evicted
+when budget is exceeded. The pattern below demonstrates the
+`CACHE_OVERFLOW` boundary:
+
+```ts
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+    ImpulseResponseCache,
+} from "@suaveplan/audio-ir-loader";
+
+const cache = new ImpulseResponseCache(1024);
+try {
+    cache.put("big", giantIr); // channelData totals 4096 bytes
+} catch (err) {
+    if (
+        err instanceof AudioIrLoaderError &&
+        err.code === AUDIO_IR_LOADER_CODES.CACHE_OVERFLOW
+    ) {
+        console.error(
+            `IR ${err.id} needs ${err.decodedBytes} bytes (budget ${err.maxBytes})`
+        );
+    }
+}
+```
+
+## API Reference
+
+### `class ImpulseResponseCache`
+
+- `new ImpulseResponseCache(maxBytes: number)` — `maxBytes` must be a
+  positive integer; otherwise throws `CACHE_OVERFLOW` at construction.
+- `get(id: string): ImpulseResponse | undefined` — increments hits on
+  success, misses on absence.
+- `put(id: string, ir: ImpulseResponse): void` — throws `CACHE_OVERFLOW`
+  if `ir`'s decoded bytes exceed `maxBytes`; otherwise evicts oldest
+  entries until the new IR fits.
+- `evict(id: string): boolean` — drops the entry; returns whether
+  anything was removed.
+- `stats(): CacheStats` — snapshot of `{ entries, bytes, hits, misses }`.
+- `maxBytes` getter — the configured byte budget.
+
+### `CacheStats`
+
+`{ entries: number; bytes: number; hits: number; misses: number }`.
+
+### `impulseResponseBytes(ir): number`
+
+Sum of `channelData[i].byteLength` over all channels — the canonical
+budgeting metric used by the cache.
+
+## Implementation Notes
+
+`Map` preserves insertion order in JavaScript, so the eviction iterator
+walks entries in the order they were `put()` — re-inserting an existing
+id moves it to the most-recent slot (via `delete` then `set`). The
+`stats()` snapshot is freshly built on every call (no caching) because
+callers expect a point-in-time view; the cost is bounded by the size of
+the returned object (four numbers) and dominated by the V8 allocation
+itself. The constructor's positive-integer check protects against the
+`new ImpulseResponseCache(0)` foot-gun, which would otherwise let every
+single `put` throw and obscure the misconfiguration.

packages/media/audio-ir/audio-ir-loader/src/cache/cache.test.ts

@@ -0,0 +1,142 @@
+import type { ImpulseResponse } from "@suaveplan/audio-ir-core";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { ImpulseResponseCache, impulseResponseBytes } from "./cache.js";
+
+const ENTRY = (id: string) => ({
+    id,
+    family: "room" as const,
+    uri: `bundle://x/${id}.wav`,
+    channels: 1,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+});
+
+function makeIR(id: string, bytesPerChannel: number): ImpulseResponse {
+    const samples = bytesPerChannel / 4;
+    const buf = new Float32Array(samples);
+    return Object.freeze({
+        id,
+        channelData: Object.freeze([buf]),
+        channels: 1,
+        sampleRate: 44100,
+        lengthFrames: samples,
+        durationSec: samples / 44100,
+        gainDb: 0,
+        family: "room",
+        manifest: Object.freeze(ENTRY(id)),
+    }) as ImpulseResponse;
+}
+
+describe("impulseResponseBytes", () => {
+    it("sums byteLength across channels", { timeout: 5000 }, () => {
+        const ir = makeIR("club-x", 1024);
+        expect(impulseResponseBytes(ir)).toBe(1024);
+    });
+});
+
+describe("ImpulseResponseCache", () => {
+    it("rejects non-positive maxBytes at construction", {
+        timeout: 5000,
+    }, () => {
+        expect(() => new ImpulseResponseCache(0)).toThrow(AudioIrLoaderError);
+        expect(() => new ImpulseResponseCache(-1)).toThrow(AudioIrLoaderError);
+        expect(() => new ImpulseResponseCache(1.5)).toThrow(AudioIrLoaderError);
+    });
+
+    it("get returns undefined and counts misses for absent keys", {
+        timeout: 5000,
+    }, () => {
+        const c = new ImpulseResponseCache(4096);
+        expect(c.get("nope")).toBeUndefined();
+        expect(c.stats()).toEqual({
+            entries: 0,
+            bytes: 0,
+            hits: 0,
+            misses: 1,
+        });
+    });
+
+    it("second load returns cached reference without re-decode", {
+        timeout: 5000,
+    }, () => {
+        const c = new ImpulseResponseCache(4096);
+        const ir = makeIR("club-a", 1024);
+        c.put("club-a", ir);
+        const first = c.get("club-a");
+        const second = c.get("club-a");
+        expect(first).toBe(ir);
+        expect(second).toBe(ir);
+        expect(c.stats().hits).toBe(2);
+    });
+
+    it("LRU evicts oldest by insertion when maxBytes exceeded", {
+        timeout: 5000,
+    }, () => {
+        // maxBytes sized to hold exactly two 1024-byte IRs.
+        const c = new ImpulseResponseCache(2048);
+        c.put("a", makeIR("a", 1024));
+        c.put("b", makeIR("b", 1024));
+        c.put("c", makeIR("c", 1024));
+        expect(c.stats().entries).toBe(2);
+        expect(c.get("a")).toBeUndefined();
+        expect(c.get("b")).toBeDefined();
+        expect(c.get("c")).toBeDefined();
+    });
+
+    it("oversize IR throws CACHE_OVERFLOW", { timeout: 5000 }, () => {
+        const c = new ImpulseResponseCache(1024);
+        const big = makeIR("big", 4096);
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            c.put("big", big);
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.CACHE_OVERFLOW);
+        expect(captured?.maxBytes).toBe(1024);
+        expect(captured?.decodedBytes).toBe(4096);
+        expect(captured?.id).toBe("big");
+    });
+
+    it("evict returns true on hit and false on miss", {
+        timeout: 5000,
+    }, () => {
+        const c = new ImpulseResponseCache(2048);
+        c.put("x", makeIR("x", 512));
+        expect(c.evict("x")).toBe(true);
+        expect(c.evict("x")).toBe(false);
+        expect(c.stats().entries).toBe(0);
+        expect(c.stats().bytes).toBe(0);
+    });
+
+    it("put over an existing id replaces the entry in place", {
+        timeout: 5000,
+    }, () => {
+        const c = new ImpulseResponseCache(4096);
+        c.put("x", makeIR("x", 1024));
+        c.put("x", makeIR("x", 2048));
+        expect(c.stats().entries).toBe(1);
+        expect(c.stats().bytes).toBe(2048);
+    });
+
+    it("maxBytes getter reports the configured budget", {
+        timeout: 5000,
+    }, () => {
+        const c = new ImpulseResponseCache(8192);
+        expect(c.maxBytes).toBe(8192);
+    });
+
+    it("stats reflects bytes after eviction", { timeout: 5000 }, () => {
+        const c = new ImpulseResponseCache(2048);
+        c.put("a", makeIR("a", 1024));
+        c.put("b", makeIR("b", 1024));
+        c.put("c", makeIR("c", 1024));
+        expect(c.stats().bytes).toBe(2048);
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/cache/cache.ts

@@ -0,0 +1,132 @@
+import type { ImpulseResponse } from "@suaveplan/audio-ir-core";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+
+/** Snapshot of cache state surfaced via `IrLoader.cacheStats()`. */
+export interface CacheStats {
+    readonly entries: number;
+    readonly bytes: number;
+    readonly hits: number;
+    readonly misses: number;
+}
+
+/**
+ * Compute the total decoded byte-length of an `ImpulseResponse`'s
+ * channelData. Used both for cache accounting and for the `CACHE_OVERFLOW`
+ * pre-check.
+ */
+export function impulseResponseBytes(ir: ImpulseResponse): number {
+    let total = 0;
+    for (const channel of ir.channelData) {
+        total += channel.byteLength;
+    }
+    return total;
+}
+
+interface CacheEntry {
+    readonly ir: ImpulseResponse;
+    readonly bytes: number;
+}
+
+/**
+ * In-process LRU keyed by IR id, bounded by total decoded bytes.
+ *
+ * Eviction is oldest-by-insertion (not access-time): IRs are typically
+ * loaded once and held, so insertion-time eviction is both simpler and
+ * better-behaved than access-time LRU at this scale. A single IR larger
+ * than the configured `maxBytes` throws `CACHE_OVERFLOW` instead of
+ * evicting every other entry — better to fail loud than to thrash.
+ */
+export class ImpulseResponseCache {
+    readonly #maxBytes: number;
+    readonly #entries = new Map<string, CacheEntry>();
+    #bytes = 0;
+    #hits = 0;
+    #misses = 0;
+
+    public constructor(maxBytes: number) {
+        if (!Number.isInteger(maxBytes) || maxBytes <= 0) {
+            throw new AudioIrLoaderError(
+                AUDIO_IR_LOADER_CODES.CACHE_OVERFLOW,
+                "cache maxBytes must be a positive integer",
+                { maxBytes }
+            );
+        }
+        this.#maxBytes = maxBytes;
+    }
+
+    /** Configured byte budget. */
+    public get maxBytes(): number {
+        return this.#maxBytes;
+    }
+
+    /** `get(id)` — increments hits on success, misses on absence. */
+    public get(id: string): ImpulseResponse | undefined {
+        const entry = this.#entries.get(id);
+        if (entry === undefined) {
+            this.#misses += 1;
+            return undefined;
+        }
+        this.#hits += 1;
+        return entry.ir;
+    }
+
+    /**
+     * Insert `ir` into the cache. Throws `CACHE_OVERFLOW` if `ir` alone
+     * exceeds `maxBytes`. Otherwise evicts oldest-by-insertion entries
+     * until total bytes ≤ `maxBytes - irBytes`, then inserts.
+     */
+    public put(id: string, ir: ImpulseResponse): void {
+        const irBytes = impulseResponseBytes(ir);
+        if (irBytes > this.#maxBytes) {
+            throw new AudioIrLoaderError(
+                AUDIO_IR_LOADER_CODES.CACHE_OVERFLOW,
+                `IR ${id} decodes to ${irBytes} bytes; cache budget is ${this.#maxBytes}`,
+                {
+                    id,
+                    maxBytes: this.#maxBytes,
+                    decodedBytes: irBytes,
+                }
+            );
+        }
+        const existing = this.#entries.get(id);
+        if (existing !== undefined) {
+            this.#bytes -= existing.bytes;
+            this.#entries.delete(id);
+        }
+        // Evict oldest until insertion fits. The constructor enforces
+        // `irBytes <= maxBytes`, so the loop is guaranteed to terminate
+        // before draining every entry — the `Map.keys()` iterator and
+        // its corresponding `get()` are always defined for live entries.
+        const iter = this.#entries.keys();
+        while (this.#bytes + irBytes > this.#maxBytes) {
+            const evictId = iter.next().value as string;
+            const evictEntry = this.#entries.get(evictId) as CacheEntry;
+            this.#bytes -= evictEntry.bytes;
+            this.#entries.delete(evictId);
+        }
+        this.#entries.set(id, { ir, bytes: irBytes });
+        this.#bytes += irBytes;
+    }
+
+    /** Drop the entry for `id`. Returns whether anything was removed. */
+    public evict(id: string): boolean {
+        const entry = this.#entries.get(id);
+        if (entry === undefined) return false;
+        this.#bytes -= entry.bytes;
+        this.#entries.delete(id);
+        return true;
+    }
+
+    /** Snapshot of current cache state. */
+    public stats(): CacheStats {
+        return {
+            entries: this.#entries.size,
+            bytes: this.#bytes,
+            hits: this.#hits,
+            misses: this.#misses,
+        };
+    }
+}

packages/media/audio-ir/audio-ir-loader/src/cache/index.ts

@@ -0,0 +1,5 @@
+export type { CacheStats } from "./cache.js";
+export {
+    ImpulseResponseCache,
+    impulseResponseBytes,
+} from "./cache.js";

packages/media/audio-ir/audio-ir-loader/src/error-codes/error-codes.md

@@ -0,0 +1,102 @@
+# `error-codes.ts` — `AUDIO_IR_LOADER.*` registry
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module is the single source of truth for every error code raised by
+`@suaveplan/audio-ir-loader`. It uses `defineCodes` from `@suaveplan/error`
+to register an immutable, byte-stable mapping of short keys (`MANIFEST_MISMATCH`)
+to fully-qualified strings (`AUDIO_IR_LOADER.MANIFEST_MISMATCH`). It also
+declares the `AudioIrLoaderError` class, which exposes every dimension an
+operator might filter on (`id`, `extension`, `field`, `manifestValue`,
+`decodedValue`, `maxBytes`, `decodedBytes`, `errors`) as typed read-only
+properties so dashboards and routing layers never have to parse message
+text to know what happened.
+
+## Features
+
+- Six codes — `DECODER_UNAVAILABLE`, `MANIFEST_MISMATCH`, `ABORTED`,
+  `CACHE_OVERFLOW`, `DECODE_FAILED`, `RESOLVE_FAILED`.
+- Frozen registry object — `Object.isFrozen(AUDIO_IR_LOADER_CODES)` is true.
+- Typed error class with discriminants pre-typed on the class.
+- Aggregate `errors[]` for the `DECODE_FAILED` partial-failure path from
+  `preload`.
+
+## Usage: Basic
+
+```ts
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "@suaveplan/audio-ir-loader";
+
+throw new AudioIrLoaderError(
+    AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+    "no decoder registered for .flac",
+    { id: "club-club1", extension: "flac" }
+);
+```
+
+## Usage: Advanced
+
+The aggregate `errors` discriminant powers the `preload` partial-failure
+contract:
+
+```ts
+import { AudioIrLoaderError, AUDIO_IR_LOADER_CODES } from "@suaveplan/audio-ir-loader";
+
+try {
+    await loader.preload(["a", "b", "c"]);
+} catch (err) {
+    if (
+        err instanceof AudioIrLoaderError &&
+        err.code === AUDIO_IR_LOADER_CODES.DECODE_FAILED
+    ) {
+        for (const { id, error } of err.errors ?? []) {
+            console.error(`load ${id} failed:`, error.code);
+        }
+    }
+}
+```
+
+Operators routing on the structured discriminants can ship dashboards that
+break down failures by `extension` for `DECODER_UNAVAILABLE`, by `field` for
+`MANIFEST_MISMATCH`, and by the size pair (`maxBytes` / `decodedBytes`) for
+`CACHE_OVERFLOW`, with zero message-text regexes.
+
+## API Reference
+
+### `AUDIO_IR_LOADER_CODES`
+
+Frozen `Readonly<Record<Key, "AUDIO_IR_LOADER.<Key>">>` with keys
+`DECODER_UNAVAILABLE`, `MANIFEST_MISMATCH`, `ABORTED`, `CACHE_OVERFLOW`,
+`DECODE_FAILED`, `RESOLVE_FAILED`.
+
+### `AudioIrLoaderError extends SuaveplanError`
+
+Constructor: `(code, message, options?)`. Discriminants on the instance:
+`id`, `extension`, `field`, `manifestValue`, `decodedValue`, `maxBytes`,
+`decodedBytes`, `errors`. `name === "AudioIrLoaderError"`.
+
+### `AudioIrLoaderErrorOptions`
+
+Extends `SuaveplanErrorOptions` with the seven optional discriminants
+listed on the class plus `errors: readonly AggregatedLoadFailure[]`.
+
+### `AggregatedLoadFailure`
+
+`{ id: string; error: SuaveplanError }` — one entry per failed id in a
+`preload` aggregate.
+
+## Implementation Notes
+
+`defineCodes` returns a frozen object; the registry guarantees byte-stable
+code strings across builds. The discriminants on `AudioIrLoaderError` are
+declared as `T | undefined` rather than via `exactOptionalPropertyTypes`
+gymnastics so callers reading the property always get an unambiguous
+"absent" sentinel. Every code in this registry is exercised by a real
+call site under test (see `error-codes.test.ts`) — the exhaustion test
+guarantees we cannot register a code that has no production thrower.

packages/media/audio-ir/audio-ir-loader/src/error-codes/error-codes.test.ts

@@ -0,0 +1,331 @@
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+import {
+    createStorageUriResolver,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { ImpulseResponseCache } from "../cache/cache.js";
+import { type AudioDecoder, createIrLoader } from "../loader/loader.js";
+import { runPreload } from "../loader/preload.js";
+import { resetInstruments } from "../otel/otel.js";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+    type AudioIrLoaderErrorCode,
+} from "./error-codes.js";
+
+const ENTRY: IrManifestEntry = Object.freeze({
+    id: "club-club1",
+    family: "room",
+    uri: "bundle://x/club1.wav",
+    channels: 1,
+    sampleRate: 44100,
+    gainDb: 0,
+    license: "MIT",
+    source: "demo",
+}) as IrManifestEntry;
+
+const FLAC_ENTRY: IrManifestEntry = Object.freeze({
+    ...ENTRY,
+    id: "club-club2",
+    uri: "bundle://x/club2.flac",
+}) as IrManifestEntry;
+
+function buildResolver(reads: Record<string, Uint8Array>): {
+    resolver: ReturnType<typeof createStorageUriResolver>;
+    plugin: UriPlugin;
+} {
+    const plugin: UriPlugin = {
+        scheme: "bundle",
+        adapter: {
+            async get(key: string) {
+                return reads[key];
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key) {
+                return key in reads;
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            const noScheme = uri.replace(/^bundle:\/\//, "");
+            return { key: noScheme };
+        },
+    };
+    return { resolver: createStorageUriResolver([plugin]), plugin };
+}
+
+const noopWavBytes = new Uint8Array([1, 2, 3]);
+function decoderThrowing(code: string): AudioDecoder {
+    return async () => {
+        const err = new Error(`fixture decoder threw ${code}`);
+        throw err;
+    };
+}
+
+async function exerciseDecoderUnavailable(): Promise<
+    AudioIrLoaderError | undefined
+> {
+    resetInstruments();
+    const registry = createIrRegistry();
+    registry.register(FLAC_ENTRY, {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    const { resolver } = buildResolver({ "x/club2.flac": noopWavBytes });
+    const loader = createIrLoader({
+        registry,
+        resolver,
+        decoders: { wav: decoderThrowing("nope") },
+    });
+    try {
+        await loader.load("club-club2");
+    } catch (err) {
+        if (err instanceof AudioIrLoaderError) return err;
+    }
+    return undefined;
+}
+
+async function exerciseManifestMismatch(): Promise<
+    AudioIrLoaderError | undefined
+> {
+    resetInstruments();
+    const registry = createIrRegistry();
+    registry.register(ENTRY, {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    const { resolver } = buildResolver({ "x/club1.wav": noopWavBytes });
+    const decoder: AudioDecoder = async () => ({
+        channelData: [new Float32Array([0.1])],
+        channels: 1,
+        sampleRate: 22050,
+    });
+    const loader = createIrLoader({
+        registry,
+        resolver,
+        decoders: { wav: decoder },
+    });
+    try {
+        await loader.load("club-club1");
+    } catch (err) {
+        if (err instanceof AudioIrLoaderError) return err;
+    }
+    return undefined;
+}
+
+async function exerciseAborted(): Promise<AudioIrLoaderError | undefined> {
+    resetInstruments();
+    const registry = createIrRegistry();
+    registry.register(ENTRY, {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    const { resolver } = buildResolver({ "x/club1.wav": noopWavBytes });
+    const decoder: AudioDecoder = async () => ({
+        channelData: [new Float32Array([0])],
+        channels: 1,
+        sampleRate: 44100,
+    });
+    const loader = createIrLoader({
+        registry,
+        resolver,
+        decoders: { wav: decoder },
+    });
+    const controller = new AbortController();
+    controller.abort(new Error("preflight"));
+    try {
+        await loader.load("club-club1", { signal: controller.signal });
+    } catch (err) {
+        if (err instanceof AudioIrLoaderError) return err;
+    }
+    return undefined;
+}
+
+async function exerciseCacheOverflow(): Promise<
+    AudioIrLoaderError | undefined
+> {
+    const cache = new ImpulseResponseCache(64);
+    const big = Object.freeze({
+        id: "big",
+        channelData: Object.freeze([new Float32Array(1024)]),
+        channels: 1,
+        sampleRate: 44100,
+        lengthFrames: 1024,
+        durationSec: 1024 / 44100,
+        gainDb: 0,
+        family: "room" as const,
+        manifest: ENTRY,
+    });
+    try {
+        cache.put("big", big as unknown as Parameters<typeof cache.put>[1]);
+    } catch (err) {
+        if (err instanceof AudioIrLoaderError) return err;
+    }
+    return undefined;
+}
+
+async function exerciseDecodeFailed(): Promise<AudioIrLoaderError | undefined> {
+    resetInstruments();
+    const registry = createIrRegistry();
+    registry.register(ENTRY, {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    const { resolver } = buildResolver({ "x/club1.wav": noopWavBytes });
+    const decoder: AudioDecoder = async () => ({
+        channelData: [new Float32Array([0])],
+        channels: 99,
+        sampleRate: 44100,
+    });
+    const loader = createIrLoader({
+        registry,
+        resolver,
+        decoders: { wav: decoder },
+    });
+    try {
+        await runPreload(
+            (id, opts) => loader.load(id, opts),
+            ["club-club1"],
+            undefined
+        );
+    } catch (err) {
+        if (err instanceof AudioIrLoaderError) return err;
+    }
+    return undefined;
+}
+
+async function exerciseResolveFailed(): Promise<
+    AudioIrLoaderError | undefined
+> {
+    resetInstruments();
+    const registry = createIrRegistry();
+    registry.register(ENTRY, {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    const { resolver } = buildResolver({ "x/club1.wav": noopWavBytes });
+    const decoder: AudioDecoder = async () => ({
+        channelData: [new Float32Array([0])],
+        channels: 1,
+        sampleRate: 44100,
+    });
+    const loader = createIrLoader({
+        registry,
+        resolver,
+        decoders: { wav: decoder },
+    });
+    // Build a fake load fn that throws a non-SuaveplanError to trigger
+    // the RESOLVE_FAILED wrapper inside runPreload.
+    const badLoader = async () => {
+        throw new TypeError("plain error");
+    };
+    try {
+        await runPreload(
+            badLoader as unknown as (id: string) => Promise<never>,
+            ["x"],
+            undefined
+        );
+    } catch (err) {
+        // top-level err is DECODE_FAILED whose `errors[0].error` is the RESOLVE_FAILED
+        if (err instanceof AudioIrLoaderError && err.errors !== undefined) {
+            const first = err.errors[0]?.error;
+            if (first instanceof AudioIrLoaderError) return first;
+        }
+    }
+    // touch loader to avoid unused warning
+    void loader;
+    return undefined;
+}
+
+function siteFor(
+    code: AudioIrLoaderErrorCode
+): () => Promise<AudioIrLoaderError | undefined> {
+    if (code === AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE)
+        return exerciseDecoderUnavailable;
+    if (code === AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH)
+        return exerciseManifestMismatch;
+    if (code === AUDIO_IR_LOADER_CODES.ABORTED) return exerciseAborted;
+    if (code === AUDIO_IR_LOADER_CODES.CACHE_OVERFLOW)
+        return exerciseCacheOverflow;
+    if (code === AUDIO_IR_LOADER_CODES.DECODE_FAILED)
+        return exerciseDecodeFailed;
+    if (code === AUDIO_IR_LOADER_CODES.RESOLVE_FAILED)
+        return exerciseResolveFailed;
+    return async () => undefined;
+}
+
+describe("AUDIO_IR_LOADER_CODES exhaustion", () => {
+    it("every AUDIO_IR_LOADER code reachable from a real call site", {
+        timeout: 30000,
+    }, async () => {
+        const all = Object.values(AUDIO_IR_LOADER_CODES);
+        expect(all.length).toBe(6);
+        for (const code of all) {
+            const err = await siteFor(code)();
+            expect(err, `no real call site exercises ${code}`).toBeDefined();
+            expect(err?.code).toBe(code);
+        }
+    });
+
+    it("registry exposes exactly six codes", { timeout: 5000 }, () => {
+        const names = Object.keys(AUDIO_IR_LOADER_CODES).sort();
+        expect(names).toEqual([
+            "ABORTED",
+            "CACHE_OVERFLOW",
+            "DECODER_UNAVAILABLE",
+            "DECODE_FAILED",
+            "MANIFEST_MISMATCH",
+            "RESOLVE_FAILED",
+        ]);
+    });
+
+    it("AUDIO_IR_LOADER_CODES registry is frozen", { timeout: 5000 }, () => {
+        expect(Object.isFrozen(AUDIO_IR_LOADER_CODES)).toBe(true);
+    });
+
+    it("AudioIrLoaderError surfaces typed discriminants", {
+        timeout: 5000,
+    }, () => {
+        const err = new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH,
+            "x",
+            {
+                id: "club-a",
+                field: "channels",
+                manifestValue: 2,
+                decodedValue: 1,
+            }
+        );
+        expect(err.name).toBe("AudioIrLoaderError");
+        expect(err.id).toBe("club-a");
+        expect(err.field).toBe("channels");
+        expect(err.manifestValue).toBe(2);
+        expect(err.decodedValue).toBe(1);
+    });
+
+    it("AudioIrLoaderError with no options leaves discriminants undefined", {
+        timeout: 5000,
+    }, () => {
+        const err = new AudioIrLoaderError(AUDIO_IR_LOADER_CODES.ABORTED, "x");
+        expect(err.id).toBeUndefined();
+        expect(err.extension).toBeUndefined();
+        expect(err.field).toBeUndefined();
+        expect(err.manifestValue).toBeUndefined();
+        expect(err.decodedValue).toBeUndefined();
+        expect(err.maxBytes).toBeUndefined();
+        expect(err.decodedBytes).toBeUndefined();
+        expect(err.errors).toBeUndefined();
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/error-codes/error-codes.ts

@@ -0,0 +1,87 @@
+import {
+    defineCodes,
+    SuaveplanError,
+    type SuaveplanErrorOptions,
+} from "@suaveplan/error";
+
+/**
+ * Frozen registry of every error code raised by `@suaveplan/audio-ir-loader`.
+ *
+ * Six codes total — `DECODER_UNAVAILABLE`, `MANIFEST_MISMATCH`, `ABORTED`,
+ * `CACHE_OVERFLOW`, `DECODE_FAILED`, `RESOLVE_FAILED`. Every code is
+ * reachable from a real production call site exercised by the test suite.
+ *
+ * Errors from upstream packages (`AUDIO_IR.*`, `STORAGE_URI.*`,
+ * `BUNDLE_URI.*`, `FALLBACK_URI.*`, `DRIVE_URI.*`, `AUDIO_DECODE.<FMT>.*`)
+ * pass through verbatim — the loader does NOT re-wrap them.
+ */
+export const AUDIO_IR_LOADER_CODES = defineCodes("AUDIO_IR_LOADER", [
+    "DECODER_UNAVAILABLE",
+    "MANIFEST_MISMATCH",
+    "ABORTED",
+    "CACHE_OVERFLOW",
+    "DECODE_FAILED",
+    "RESOLVE_FAILED",
+] as const);
+
+export type AudioIrLoaderErrorCode =
+    (typeof AUDIO_IR_LOADER_CODES)[keyof typeof AUDIO_IR_LOADER_CODES];
+
+/** Per-id failure entry carried by aggregate `DECODE_FAILED` errors. */
+export interface AggregatedLoadFailure {
+    readonly id: string;
+    readonly error: SuaveplanError;
+}
+
+export interface AudioIrLoaderErrorOptions extends SuaveplanErrorOptions {
+    /** The IR identifier the operation targeted. */
+    id?: string | undefined;
+    /** File extension extracted from the URI for DECODER_UNAVAILABLE. */
+    extension?: string | undefined;
+    /** Field on which the manifest diverged from the decoded audio. */
+    field?: "channels" | "sampleRate" | undefined;
+    /** Manifest-declared value for MANIFEST_MISMATCH. */
+    manifestValue?: number | undefined;
+    /** Decoded value for MANIFEST_MISMATCH. */
+    decodedValue?: number | undefined;
+    /** Configured cache budget for CACHE_OVERFLOW. */
+    maxBytes?: number | undefined;
+    /** Decoded byte total for CACHE_OVERFLOW. */
+    decodedBytes?: number | undefined;
+    /** Per-id error list for aggregate DECODE_FAILED throws. */
+    errors?: readonly AggregatedLoadFailure[] | undefined;
+}
+
+/**
+ * Structured error for every `AUDIO_IR_LOADER.*` throw.
+ *
+ * Every dimension an operator filters on is a typed discriminant — never
+ * parsed from message text. All fields are exposed as readonly properties.
+ */
+export class AudioIrLoaderError extends SuaveplanError<AudioIrLoaderErrorCode> {
+    public readonly id: string | undefined;
+    public readonly extension: string | undefined;
+    public readonly field: "channels" | "sampleRate" | undefined;
+    public readonly manifestValue: number | undefined;
+    public readonly decodedValue: number | undefined;
+    public readonly maxBytes: number | undefined;
+    public readonly decodedBytes: number | undefined;
+    public readonly errors: readonly AggregatedLoadFailure[] | undefined;
+
+    public constructor(
+        code: AudioIrLoaderErrorCode,
+        message: string,
+        options?: AudioIrLoaderErrorOptions
+    ) {
+        super(code, message, options);
+        this.id = options?.id;
+        this.extension = options?.extension;
+        this.field = options?.field;
+        this.manifestValue = options?.manifestValue;
+        this.decodedValue = options?.decodedValue;
+        this.maxBytes = options?.maxBytes;
+        this.decodedBytes = options?.decodedBytes;
+        this.errors = options?.errors;
+        this.name = "AudioIrLoaderError";
+    }
+}

packages/media/audio-ir/audio-ir-loader/src/error-codes/index.ts

@@ -0,0 +1,9 @@
+export type {
+    AggregatedLoadFailure,
+    AudioIrLoaderErrorCode,
+    AudioIrLoaderErrorOptions,
+} from "./error-codes.js";
+export {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "./error-codes.js";

packages/media/audio-ir/audio-ir-loader/src/index.ts

@@ -0,0 +1,42 @@
+// Side-effect import: ensures the AUDIO_IR_LOADER.* code registry registers
+// even when subpath consumers never reach this barrel.
+import "./error-codes/error-codes.js";
+
+export {
+    type CacheStats,
+    ImpulseResponseCache,
+    impulseResponseBytes,
+} from "./cache/cache.js";
+export {
+    type AggregatedLoadFailure,
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+    type AudioIrLoaderErrorCode,
+    type AudioIrLoaderErrorOptions,
+} from "./error-codes/error-codes.js";
+export { extractExtension } from "./loader/extension.js";
+export {
+    type AudioDecoder,
+    type CreateIrLoaderOptions,
+    createIrLoader,
+    type IrLoader,
+    type LoadOptions,
+    type PreloadOptions,
+} from "./loader/loader.js";
+export {
+    type DecodedAudioLike,
+    validateAndFinalize,
+} from "./loader/manifest-validation.js";
+export { runPreload } from "./loader/preload.js";
+export {
+    type AudioIrLoaderInstruments,
+    type AudioIrLoaderLoadOutcome,
+    getInstruments,
+    recordCacheHit,
+    recordCacheMiss,
+    recordError,
+    recordSuccess,
+    resetInstruments,
+    setAudioIrLoaderMeterProvider,
+    uriKindOf,
+} from "./otel/otel.js";

packages/media/audio-ir/audio-ir-loader/src/loader/extension.md

@@ -0,0 +1,90 @@
+# `extension.ts` — URI → file-extension extraction
+
+## Purpose
+
+The loader dispatches decoders by file extension. This module owns the
+canonicalisation step: given a URI string (which may be `bundle://`,
+`https://`, `drive://`, plain path-based, or `fallback://?u=…&u=…`),
+return the lowercase extension that decides which `AudioDecoder` runs.
+Cross-format `fallback://` URIs are explicitly rejected with
+`DECODER_UNAVAILABLE` — a single load must pick a single decoder.
+
+## Features
+
+- Universal across `bundle://`, `https://`, `drive://`, and arbitrary
+  path-based URIs.
+- Recursive handling for `fallback://` URIs — every candidate is
+  re-extracted and the result must agree across candidates.
+- Query and fragment components are stripped before extension extraction.
+- Throws `AUDIO_IR_LOADER.DECODER_UNAVAILABLE` on every failure mode
+  (missing extension, parse error, candidate disagreement).
+
+## Usage: Basic
+
+```ts
+import { extractExtension } from "@suaveplan/audio-ir-loader";
+
+extractExtension("bundle://x/foo.wav");  // → "wav"
+extractExtension("https://cdn.example.com/path/clip.WAV?v=2"); // → "wav"
+extractExtension("fallback://?u=bundle%3A%2F%2Fx%2Fa.wav&u=https%3A%2F%2Fh%2Fa.wav");
+// → "wav"
+```
+
+## Usage: Advanced
+
+The loader uses this helper at the start of every `load(id)` to pick the
+right decoder before any I/O happens:
+
+```ts
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+    extractExtension,
+} from "@suaveplan/audio-ir-loader";
+
+function pickDecoder<D>(decoders: Record<string, D>, uri: string, id: string): D {
+    const ext = extractExtension(uri, id);
+    const decoder = decoders[ext];
+    if (decoder === undefined) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+            `no decoder registered for '.${ext}'`,
+            { id, extension: ext }
+        );
+    }
+    return decoder;
+}
+```
+
+Cross-format fallback URIs surface as a single `DECODER_UNAVAILABLE`
+throw with the first extension preserved on the error's `extension`
+discriminant, which makes the diagnostic easy to act on in the manifest
+authoring step.
+
+## API Reference
+
+### `extractExtension(uri: string, id?: string): string`
+
+Returns the lowercase extension. The optional `id` is forwarded to the
+`AudioIrLoaderError.id` discriminant on every throw so observers can
+filter by IR identifier.
+
+Throws `AUDIO_IR_LOADER.DECODER_UNAVAILABLE` when:
+
+- the URI carries no `.<ext>` segment after the last `/`,
+- the URI is `fallback://` and is not parseable as a URL,
+- the URI is `fallback://` with zero `u=` candidates,
+- the URI is `fallback://` and candidates disagree on extension.
+
+## Implementation Notes
+
+The `bundle://x/y.wav` URI form is technically not a valid RFC 3986
+authority-less URI but every consumer of `audio-ir-loader` already deals
+with it through `storage-uri-plugin-bundle`'s own parser; the
+path-stripping in this module is intentionally permissive about authority
+shape so callers get a consistent dispatch result regardless of whether
+the path-component is `//host/key.wav` or `:/path/key.wav`. The
+`fallback://` walk delegates to `extractExtension` recursively, so any
+future URI scheme that itself wraps candidates (e.g. a hypothetical
+`mirror://`) would only need to extend `FALLBACK_PREFIX` matching and
+fall through to the same recursion.

packages/media/audio-ir/audio-ir-loader/src/loader/extension.test.ts

@@ -0,0 +1,118 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { extractExtension } from "./extension.js";
+
+describe("extractExtension", () => {
+    it("extracts ext from a bundle:// URI", { timeout: 5000 }, () => {
+        expect(extractExtension("bundle://pkg/club1.wav")).toBe("wav");
+    });
+
+    it("extracts ext from an https URI", { timeout: 5000 }, () => {
+        expect(extractExtension("https://cdn.example.com/clip.flac")).toBe(
+            "flac"
+        );
+    });
+
+    it("extracts ext from a drive:// URI", { timeout: 5000 }, () => {
+        expect(extractExtension("drive://share/key/x.opus")).toBe("opus");
+    });
+
+    it("lowercases the extension", { timeout: 5000 }, () => {
+        expect(extractExtension("https://h/p/clip.WAV")).toBe("wav");
+    });
+
+    it("strips query and fragment before extracting", {
+        timeout: 5000,
+    }, () => {
+        expect(extractExtension("https://h/p/clip.wav?v=2#frag")).toBe("wav");
+    });
+
+    it("throws DECODER_UNAVAILABLE when no extension is present", {
+        timeout: 5000,
+    }, () => {
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            extractExtension("bundle://pkg/clip");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE);
+    });
+
+    it("propagates id discriminant on throw", { timeout: 5000 }, () => {
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            extractExtension("bundle://pkg/clip", "club-a");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.id).toBe("club-a");
+    });
+
+    it("walks fallback:// candidates and returns the agreed ext", {
+        timeout: 5000,
+    }, () => {
+        const a = encodeURIComponent("bundle://pkg/x.wav");
+        const b = encodeURIComponent("https://h/x.wav");
+        const uri = `fallback://?u=${a}&u=${b}`;
+        expect(extractExtension(uri)).toBe("wav");
+    });
+
+    it("throws DECODER_UNAVAILABLE when fallback candidates disagree", {
+        timeout: 5000,
+    }, () => {
+        const a = encodeURIComponent("bundle://pkg/x.wav");
+        const b = encodeURIComponent("https://h/x.flac");
+        const uri = `fallback://?u=${a}&u=${b}`;
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            extractExtension(uri, "club-a");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE);
+        expect(captured?.extension).toBe("wav");
+    });
+
+    it("throws DECODER_UNAVAILABLE on empty fallback candidate list", {
+        timeout: 5000,
+    }, () => {
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            extractExtension("fallback://");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE);
+    });
+
+    it("throws DECODER_UNAVAILABLE on fallback URI with no candidates (alt form)", {
+        timeout: 5000,
+    }, () => {
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            // `fallback:` with no authority and no `u=` query → zero
+            // candidates; the candidate-walk surfaces DECODER_UNAVAILABLE.
+            extractExtension("fallback:%%%");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE);
+    });
+
+    it("throws when URI ends with a dot (empty extension)", {
+        timeout: 5000,
+    }, () => {
+        expect(() => extractExtension("bundle://pkg/foo.")).toThrow(
+            AudioIrLoaderError
+        );
+    });
+
+    it("returns ext for URI with no path slash", { timeout: 5000 }, () => {
+        // Edge case: `file:bare.wav` — no slash before extension.
+        expect(extractExtension("file:bare.wav")).toBe("wav");
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/loader/extension.ts

@@ -0,0 +1,98 @@
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+
+const FALLBACK_PREFIX = /^fallback:/i;
+
+/**
+ * Extract a lowercase file extension (without dot) from a URI's path
+ * component.
+ *
+ * Handles three URI shapes:
+ *
+ *  - `bundle://x/y.wav`, `https://h/p/q.flac`, `drive://share/key.opus`,
+ *    plain `<scheme>://host/path.<ext>` → return path's trailing extension.
+ *  - `fallback://?u=<encoded-uri-1>&u=<encoded-uri-2>` → recursively
+ *    extract from each candidate, throw `DECODER_UNAVAILABLE` if
+ *    candidates disagree (the resolver would be unable to pick a single
+ *    decoder).
+ *  - Anything else → return the extension of the URI's last `.`-segment,
+ *    or throw `DECODER_UNAVAILABLE` if none exists.
+ */
+export function extractExtension(uri: string, id?: string): string {
+    if (FALLBACK_PREFIX.test(uri)) {
+        return extensionFromFallback(uri, id);
+    }
+    return extensionFromSingle(uri, id);
+}
+
+function extensionFromSingle(uri: string, id: string | undefined): string {
+    // Strip any query / fragment before extracting; an extension only
+    // applies to the path component. Splitting on `?` first lets the
+    // fragment-only case (no `?`) still fall through to the slash-tail
+    // computation.
+    const stripped = stripQueryAndFragment(uri);
+    const lastSlash = stripped.lastIndexOf("/");
+    const tail = lastSlash >= 0 ? stripped.slice(lastSlash + 1) : stripped;
+    const dot = tail.lastIndexOf(".");
+    if (dot <= 0 || dot === tail.length - 1) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+            `URI '${uri}' has no file extension`,
+            { id }
+        );
+    }
+    return tail.slice(dot + 1).toLowerCase();
+}
+
+function stripQueryAndFragment(uri: string): string {
+    // Replace every char after the first `?` or `#` (whichever is
+    // earliest) with nothing. The branch-free form lets both the
+    // present and absent cases share a single code path.
+    const limit = firstIndexOfAny(uri, ["?", "#"]);
+    return limit < 0 ? uri : uri.slice(0, limit);
+}
+
+function firstIndexOfAny(haystack: string, needles: readonly string[]): number {
+    let best = -1;
+    for (const n of needles) {
+        const idx = haystack.indexOf(n);
+        if (idx < 0) continue;
+        if (best < 0 || idx < best) best = idx;
+    }
+    return best;
+}
+
+function extensionFromFallback(uri: string, id: string | undefined): string {
+    // `URL` accepts every `fallback:<rest>` form because `fallback` is a
+    // generic non-special scheme; we therefore extract candidates through
+    // `searchParams.getAll("u")` and let the candidate-count and per-
+    // candidate dispatch surface every error. No try/catch needed.
+    const parsed = new URL(uri);
+    const candidates = parsed.searchParams.getAll("u");
+    if (candidates.length === 0) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+            `fallback URI '${uri}' carries no candidates`,
+            { id }
+        );
+    }
+    let first: string | undefined;
+    for (const candidate of candidates) {
+        const ext = extractExtension(candidate, id);
+        if (first === undefined) {
+            first = ext;
+            continue;
+        }
+        if (ext !== first) {
+            throw new AudioIrLoaderError(
+                AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+                `fallback candidates disagree on extension ('${first}' vs '${ext}')`,
+                { extension: first, id }
+            );
+        }
+    }
+    // `first` is defined here because we returned early on zero candidates.
+    return first as string;
+}

packages/media/audio-ir/audio-ir-loader/src/loader/index.ts

@@ -0,0 +1,14 @@
+export { extractExtension } from "./extension.js";
+export {
+    type AudioDecoder,
+    type CreateIrLoaderOptions,
+    createIrLoader,
+    type IrLoader,
+    type LoadOptions,
+    type PreloadOptions,
+} from "./loader.js";
+export {
+    type DecodedAudioLike,
+    validateAndFinalize,
+} from "./manifest-validation.js";
+export { runPreload } from "./preload.js";

packages/media/audio-ir/audio-ir-loader/src/loader/loader.md

@@ -0,0 +1,105 @@
+# `loader.ts` — `createIrLoader` pipeline orchestration
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module is the entry point for the package. `createIrLoader(options)`
+returns a typed `IrLoader` that composes the IR family pipeline:
+`IrRegistry.get(id)` → `cache.get(id)` (on hit, fast path) →
+`StorageUriResolver.read(uri)` → `decoders[ext](bytes)` →
+`validateAndFinalize(entry, decoded)` → `cache.put` →
+return frozen `ImpulseResponse`. Every layer's errors pass through
+verbatim — the loader only owns the six `AUDIO_IR_LOADER.*` codes from
+its own contract.
+
+## Features
+
+- Zod-validated options at construction (`createIrLoader` throws
+  `ZodError` on misuse).
+- Decoder keys normalised to lowercase so callers can write
+  `{ WAV: decodeWav }` and have it work.
+- Optional in-process LRU cache controlled by `options.cache.maxBytes`.
+- `AbortSignal` threading: short-circuits a pre-aborted signal,
+  passes the signal through to both `resolver.read` and the decoder.
+- Real OpenTelemetry instrumentation: span + duration histogram + bytes /
+  frames / cache / error counters.
+- Bounded-concurrency `preload(ids, { concurrency })` with aggregate
+  failure reporting (delegated to `preload.ts`).
+
+## Usage: Basic
+
+```ts
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { bundleUriPlugin } from "@suaveplan/storage-uri-plugin-bundle";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+
+const resolver = createStorageUriResolver([
+    bundleUriPlugin({ packageSlug: "club", rootUrl: new URL("file:///opt/ir/club/") }),
+]);
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav },
+});
+const ir = await loader.load("club-club1");
+```
+
+## Usage: Advanced
+
+The loader composes well with an LRU cache and with bounded-concurrency
+preload for app bootstrap:
+
+```ts
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav, flac: decodeFlac },
+    cache: { maxBytes: 64 * 1024 * 1024 },
+});
+const controller = new AbortController();
+const [a, b, c] = await loader.preload(
+    ["club-a", "club-b", "club-c"],
+    { signal: controller.signal, concurrency: 2 }
+);
+// Later, free a specific IR's slot:
+loader.evict("club-c");
+console.log(loader.cacheStats());
+```
+
+## API Reference
+
+### `createIrLoader(options): IrLoader`
+
+- `options.registry: IrRegistry`
+- `options.resolver: StorageUriResolver`
+- `options.decoders: Record<string, AudioDecoder>` — must be non-empty;
+  keys are case-insensitive.
+- `options.cache?: { maxBytes: number }` — positive integer; enables LRU.
+
+### `IrLoader`
+
+- `load(id, { signal? }?): Promise<ImpulseResponse>`
+- `preload(ids, { signal?, concurrency? }?): Promise<readonly ImpulseResponse[]>`
+- `evict(id): boolean`
+- `cacheStats(): { entries, bytes, hits, misses }`
+
+### `AudioDecoder`
+
+`(bytes: Uint8Array, opts?: { signal?: AbortSignal }) => Promise<DecodedAudioLike>`.
+
+## Implementation Notes
+
+The OTel span for every `load` is started before the cache hit-check so
+even cache hits emit a span; the `outcome=cache_hit` histogram label
+distinguishes those from the `outcome=success` "did real work" path. The
+`SuaveplanError`-cast on errors lets the loader's `errors_total` counter
+attribute the throw to its originating namespace (`AUDIO_IR.*`,
+`STORAGE_URI.*`, `BUNDLE_URI.*`, `FALLBACK_URI.*`, `AUDIO_DECODE.<FMT>.*`,
+or `AUDIO_IR_LOADER.*`) rather than collapsing every miss into a single
+opaque bucket. The pre-abort check throws synchronously before any
+registry / resolver / decoder call, satisfying the spec's "never invoked
+when signal is already aborted" requirement.

packages/media/audio-ir/audio-ir-loader/src/loader/loader.spec-conformance.test.ts

@@ -0,0 +1,225 @@
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+import {
+    createStorageUriResolver,
+    STORAGE_URI_CODES,
+    StorageUriError,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { afterEach, describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { resetInstruments } from "../otel/otel.js";
+import { type AudioDecoder, createIrLoader } from "./loader.js";
+
+const ENTRY = (): IrManifestEntry =>
+    ({
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://x/club1.wav",
+        channels: 1,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+    }) as IrManifestEntry;
+
+function harness() {
+    const reads = new Map<string, Uint8Array>();
+    const plugin: UriPlugin = {
+        scheme: "bundle",
+        adapter: {
+            async get(key: string) {
+                return reads.get(key);
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key) {
+                return reads.has(key);
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            return { key: uri.replace(/^bundle:\/\//, "") };
+        },
+    };
+    const resolver = createStorageUriResolver([plugin]);
+    const registry = createIrRegistry();
+    registry.register(ENTRY(), {
+        manifestSlug: "club",
+        manifestFamily: "room",
+    });
+    reads.set("x/club1.wav", new Uint8Array([1]));
+    return { resolver, registry, reads };
+}
+
+const decoderOk: AudioDecoder = async () => ({
+    channelData: [new Float32Array([0.5, 0.5])],
+    channels: 1,
+    sampleRate: 44100,
+});
+
+describe("loader spec-conformance: AbortSignal threading", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("pre-aborted signal short-circuits load", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, registry } = harness();
+        let registryGets = 0;
+        const proxiedRegistry = {
+            ...registry,
+            get(id: string) {
+                registryGets += 1;
+                return registry.get(id);
+            },
+            has: registry.has.bind(registry),
+            list: registry.list.bind(registry),
+            register: registry.register.bind(registry),
+            clear: registry.clear.bind(registry),
+        };
+        let resolverReads = 0;
+        const proxiedResolver = {
+            ...resolver,
+            read: async (uri: string, signal?: AbortSignal) => {
+                resolverReads += 1;
+                return resolver.read(uri, signal);
+            },
+        };
+        let decoderCalls = 0;
+        const decoder: AudioDecoder = async () => {
+            decoderCalls += 1;
+            return decoderOk(new Uint8Array());
+        };
+        const loader = createIrLoader({
+            registry: proxiedRegistry as unknown as Parameters<
+                typeof createIrLoader
+            >[0]["registry"],
+            resolver: proxiedResolver as unknown as Parameters<
+                typeof createIrLoader
+            >[0]["resolver"],
+            decoders: { wav: decoder },
+        });
+        const controller = new AbortController();
+        controller.abort(new Error("pre-abort"));
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.load("club-club1", { signal: controller.signal });
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.ABORTED);
+        expect(registryGets).toBe(0);
+        expect(resolverReads).toBe(0);
+        expect(decoderCalls).toBe(0);
+    });
+
+    it("mid-flight resolver abort passes through unchanged", {
+        timeout: 5000,
+    }, async () => {
+        const { registry } = harness();
+        const plugin: UriPlugin = {
+            scheme: "bundle",
+            adapter: {
+                async get(_key: string) {
+                    throw new StorageUriError(
+                        STORAGE_URI_CODES.ABORTED,
+                        "fixture mid-flight",
+                        { uri: "bundle://x/club1.wav" }
+                    );
+                },
+                async set() {
+                    return;
+                },
+                async delete() {
+                    return true;
+                },
+                async exists() {
+                    return false;
+                },
+                async list() {
+                    return { keys: [], total: 0, hasMore: false };
+                },
+                async clear() {
+                    return;
+                },
+            },
+            parse(uri: string) {
+                return { key: uri.replace(/^bundle:\/\//, "") };
+            },
+        };
+        const resolver = createStorageUriResolver([plugin]);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoderOk },
+        });
+        let captured: StorageUriError | undefined;
+        try {
+            await loader.load("club-club1");
+        } catch (err) {
+            if (err instanceof StorageUriError) captured = err;
+        }
+        expect(captured?.code).toBe(STORAGE_URI_CODES.ABORTED);
+    });
+
+    it("threads signal through to the decoder", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, registry } = harness();
+        let signalSeen: AbortSignal | undefined;
+        const decoder: AudioDecoder = async (_bytes, opts) => {
+            signalSeen = opts?.signal;
+            return {
+                channelData: [new Float32Array([0])],
+                channels: 1,
+                sampleRate: 44100,
+            };
+        };
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        const controller = new AbortController();
+        await loader.load("club-club1", { signal: controller.signal });
+        expect(signalSeen).toBe(controller.signal);
+    });
+});
+
+describe("loader spec-conformance: cache identity", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("cacheStats survives an evict round-trip", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, registry } = harness();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoderOk },
+            cache: { maxBytes: 4096 },
+        });
+        await loader.load("club-club1");
+        expect(loader.cacheStats().entries).toBe(1);
+        loader.evict("club-club1");
+        expect(loader.cacheStats().entries).toBe(0);
+        // Idempotent evict — second call is a no-op.
+        expect(loader.evict("club-club1")).toBe(false);
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/loader/loader.test.ts

@@ -0,0 +1,450 @@
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+import { SuaveplanError } from "@suaveplan/error";
+import {
+    createStorageUriResolver,
+    STORAGE_URI_CODES,
+    StorageUriError,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { afterEach, describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { resetInstruments } from "../otel/otel.js";
+import { type AudioDecoder, createIrLoader } from "./loader.js";
+
+const ENTRY = (overrides: Partial<IrManifestEntry> = {}): IrManifestEntry =>
+    ({
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://x/club1.wav",
+        channels: 1,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+        ...overrides,
+    }) as IrManifestEntry;
+
+interface ResolverHandle {
+    readonly resolver: ReturnType<typeof createStorageUriResolver>;
+    readonly reads: Map<string, Uint8Array | "missing" | StorageUriError>;
+}
+
+function buildResolver(): ResolverHandle {
+    const reads = new Map<string, Uint8Array | "missing" | StorageUriError>();
+    const plugin: UriPlugin = {
+        scheme: "bundle",
+        adapter: {
+            async get(key: string) {
+                const v = reads.get(key);
+                if (v === undefined || v === "missing") return undefined;
+                if (v instanceof StorageUriError) throw v;
+                return v;
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key) {
+                return reads.has(key) && reads.get(key) !== "missing";
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            return { key: uri.replace(/^bundle:\/\//, "") };
+        },
+    };
+    return { resolver: createStorageUriResolver([plugin]), reads };
+}
+
+const makeWavDecoder = (sampleRate = 44100, channels = 1): AudioDecoder => {
+    return async () => ({
+        channelData: Array.from(
+            { length: channels },
+            () => new Float32Array([1, 0, 0, 0])
+        ),
+        channels,
+        sampleRate,
+    });
+};
+
+function freshRegistry() {
+    const reg = createIrRegistry();
+    return reg;
+}
+
+describe("createIrLoader construction", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("minimal options construct a loader", { timeout: 5000 }, () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        expect(typeof loader.load).toBe("function");
+        expect(typeof loader.preload).toBe("function");
+        expect(typeof loader.evict).toBe("function");
+        expect(typeof loader.cacheStats).toBe("function");
+    });
+
+    it("throws on empty decoder map", { timeout: 5000 }, () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        expect(() =>
+            createIrLoader({
+                registry,
+                resolver,
+                decoders: {},
+            })
+        ).toThrow();
+    });
+
+    it("normalizes decoder keys to lowercase", { timeout: 5000 }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1, 2]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { WAV: makeWavDecoder() },
+        });
+        const ir = await loader.load("club-club1");
+        expect(ir.id).toBe("club-club1");
+    });
+
+    it("rejects non-positive cache.maxBytes", { timeout: 5000 }, () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        expect(() =>
+            createIrLoader({
+                registry,
+                resolver,
+                decoders: { wav: makeWavDecoder() },
+                cache: { maxBytes: 0 },
+            })
+        ).toThrow();
+    });
+});
+
+describe("IrLoader.load happy path", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("end-to-end load returns a frozen ImpulseResponse", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(
+            ENTRY({ id: "club-club1", channels: 2, sampleRate: 44100 }),
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        reads.set("x/club1.wav", new Uint8Array([1, 2, 3]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder(44100, 2) },
+        });
+        const ir = await loader.load("club-club1");
+        expect(Object.isFrozen(ir)).toBe(true);
+        expect(ir.id).toBe("club-club1");
+        expect(ir.channels).toBe(2);
+        expect(ir.sampleRate).toBe(44100);
+        expect(ir.channelData.length).toBe(2);
+    });
+});
+
+describe("IrLoader.load error pass-through", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("passes through AUDIO_IR.NOT_REGISTERED", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        let captured: SuaveplanError | undefined;
+        try {
+            await loader.load("nope");
+        } catch (err) {
+            if (err instanceof SuaveplanError) captured = err;
+        }
+        expect(captured?.code).toBe("AUDIO_IR.NOT_REGISTERED");
+        expect(captured).not.toBeInstanceOf(AudioIrLoaderError);
+    });
+
+    it("passes through resolver errors unchanged", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        // The adapter returns undefined → resolver throws NOT_FOUND.
+        reads.set("x/club1.wav", "missing");
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        let captured: StorageUriError | undefined;
+        try {
+            await loader.load("club-club1");
+        } catch (err) {
+            if (err instanceof StorageUriError) captured = err;
+        }
+        expect(captured?.code).toBe(STORAGE_URI_CODES.NOT_FOUND);
+    });
+
+    it("throws DECODER_UNAVAILABLE for unknown extension", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(
+            ENTRY({ id: "club-club2", uri: "bundle://x/club2.flac" }),
+            { manifestSlug: "club", manifestFamily: "room" }
+        );
+        reads.set("x/club2.flac", new Uint8Array([1]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.load("club-club2");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE);
+        expect(captured?.extension).toBe("flac");
+    });
+
+    it("throws MANIFEST_MISMATCH on channel-count divergence", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY({ channels: 2 }), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder(44100, 1) },
+        });
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.load("club-club1");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH);
+        expect(captured?.field).toBe("channels");
+    });
+
+    it("throws MANIFEST_MISMATCH on sample-rate divergence", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY({ channels: 1, sampleRate: 44100 }), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder(48000, 1) },
+        });
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.load("club-club1");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH);
+        expect(captured?.field).toBe("sampleRate");
+    });
+
+    it("applies gainDb multiplicatively (peak ≈ 0.5)", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY({ channels: 1, gainDb: -6.0206 }), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const decoder: AudioDecoder = async () => ({
+            channelData: [new Float32Array([1.0])],
+            channels: 1,
+            sampleRate: 44100,
+        });
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        const ir = await loader.load("club-club1");
+        const peak = (ir.channelData[0] as Float32Array)[0] as number;
+        expect(Math.abs(peak - 0.5)).toBeLessThan(1e-3);
+        expect(ir.manifest.gainDb).toBe(-6.0206);
+    });
+});
+
+describe("IrLoader non-SuaveplanError pass-through", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("propagates plain-Error throws from the decoder unchanged", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const decoder: AudioDecoder = async () => {
+            throw new TypeError("boom");
+        };
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        let captured: unknown;
+        try {
+            await loader.load("club-club1");
+        } catch (err) {
+            captured = err;
+        }
+        expect(captured).toBeInstanceOf(TypeError);
+    });
+});
+
+describe("IrLoader cache behavior", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("evict returns false when cache disabled", {
+        timeout: 5000,
+    }, () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        expect(loader.evict("nope")).toBe(false);
+    });
+
+    it("cacheStats reports zeros when cache disabled", {
+        timeout: 5000,
+    }, () => {
+        const { resolver } = buildResolver();
+        const registry = freshRegistry();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+        });
+        expect(loader.cacheStats()).toEqual({
+            entries: 0,
+            bytes: 0,
+            hits: 0,
+            misses: 0,
+        });
+    });
+
+    it("cache hit returns the same reference without re-decode", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        let decodeCalls = 0;
+        const decoder: AudioDecoder = async () => {
+            decodeCalls += 1;
+            return {
+                channelData: [new Float32Array([0.5])],
+                channels: 1,
+                sampleRate: 44100,
+            };
+        };
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+            cache: { maxBytes: 4096 },
+        });
+        const first = await loader.load("club-club1");
+        const second = await loader.load("club-club1");
+        expect(first).toBe(second);
+        expect(decodeCalls).toBe(1);
+        expect(loader.cacheStats().hits).toBe(1);
+    });
+
+    it("evict returns true when cached id is dropped", {
+        timeout: 5000,
+    }, async () => {
+        const { resolver, reads } = buildResolver();
+        const registry = freshRegistry();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: makeWavDecoder() },
+            cache: { maxBytes: 4096 },
+        });
+        await loader.load("club-club1");
+        expect(loader.evict("club-club1")).toBe(true);
+        expect(loader.evict("club-club1")).toBe(false);
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/loader/loader.ts

@@ -0,0 +1,220 @@
+import type {
+    ImpulseResponse,
+    IrFamily,
+    IrRegistry,
+} from "@suaveplan/audio-ir-core";
+import { SuaveplanError } from "@suaveplan/error";
+import type { StorageUriResolver } from "@suaveplan/storage-uri";
+import z from "zod";
+import type { CacheStats } from "../cache/cache.js";
+import { ImpulseResponseCache } from "../cache/cache.js";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import {
+    getInstruments,
+    recordCacheHit,
+    recordCacheMiss,
+    recordError,
+    recordSuccess,
+    uriKindOf,
+} from "../otel/otel.js";
+import { extractExtension } from "./extension.js";
+import {
+    type DecodedAudioLike,
+    validateAndFinalize,
+} from "./manifest-validation.js";
+import { runPreload } from "./preload.js";
+
+/**
+ * Decoder function shape consumed by the loader. Mirrors
+ * `@suaveplan/audio-decode-wav`'s `decodeWav` signature.
+ */
+export type AudioDecoder = (
+    bytes: Uint8Array,
+    options?: { signal?: AbortSignal }
+) => Promise<DecodedAudioLike>;
+
+/** Options for `IrLoader.load`. */
+export interface LoadOptions {
+    readonly signal?: AbortSignal;
+}
+
+/** Options for `IrLoader.preload`. */
+export interface PreloadOptions {
+    readonly signal?: AbortSignal;
+    readonly concurrency?: number;
+}
+
+/** Public `IrLoader` surface. */
+export interface IrLoader {
+    load(id: string, options?: LoadOptions): Promise<ImpulseResponse>;
+    preload(
+        ids: readonly string[],
+        options?: PreloadOptions
+    ): Promise<readonly ImpulseResponse[]>;
+    evict(id: string): boolean;
+    cacheStats(): CacheStats;
+}
+
+/** Input options for `createIrLoader`. */
+export interface CreateIrLoaderOptions {
+    readonly registry: IrRegistry;
+    readonly resolver: StorageUriResolver;
+    readonly decoders: Readonly<Record<string, AudioDecoder>>;
+    readonly cache?: { readonly maxBytes: number };
+}
+
+const OptionsSchema = z.object({
+    registry: z.custom<IrRegistry>(
+        (v): v is IrRegistry =>
+            v !== null &&
+            typeof v === "object" &&
+            typeof (v as IrRegistry).get === "function" &&
+            typeof (v as IrRegistry).has === "function",
+        { message: "options.registry must be an IrRegistry" }
+    ),
+    resolver: z.custom<StorageUriResolver>(
+        (v): v is StorageUriResolver =>
+            v !== null &&
+            typeof v === "object" &&
+            typeof (v as StorageUriResolver).read === "function",
+        { message: "options.resolver must be a StorageUriResolver" }
+    ),
+    decoders: z
+        .record(
+            z.string().min(1),
+            z.custom<AudioDecoder>(
+                (v): v is AudioDecoder => typeof v === "function",
+                { message: "decoder must be a function" }
+            )
+        )
+        .refine((d) => Object.keys(d).length > 0, {
+            message: "decoders must not be empty",
+        }),
+    cache: z
+        .object({
+            maxBytes: z.number().int().positive(),
+        })
+        .optional(),
+});
+
+/**
+ * Build a typed `IrLoader` bound to a registry, resolver, and decoder map.
+ *
+ * Validates `options` through Zod at construction; failures throw a
+ * `ZodError`. Decoder keys are normalised to lowercase. When
+ * `options.cache` is supplied, an in-process LRU is created with the
+ * declared `maxBytes`; when absent, the loader operates uncached.
+ */
+export function createIrLoader(options: CreateIrLoaderOptions): IrLoader {
+    const parsed = OptionsSchema.parse(options);
+    const decoders: Record<string, AudioDecoder> = {};
+    for (const [k, v] of Object.entries(parsed.decoders)) {
+        decoders[k.toLowerCase()] = v;
+    }
+    const cache =
+        parsed.cache !== undefined
+            ? new ImpulseResponseCache(parsed.cache.maxBytes)
+            : undefined;
+
+    async function loadInternal(
+        id: string,
+        loadOptions: LoadOptions | undefined
+    ): Promise<ImpulseResponse> {
+        const signal = loadOptions?.signal;
+        const started = performance.now();
+        // Pre-aborted signal: short-circuit before any side effect.
+        if (signal?.aborted === true) {
+            // `AbortSignal.reason` is always defined post-`abort()` (the
+            // platform synthesises a `DOMException` when no explicit
+            // reason was supplied) — pass it through unconditionally.
+            const err = new AudioIrLoaderError(
+                AUDIO_IR_LOADER_CODES.ABORTED,
+                "aborted before load started",
+                { id, cause: signal.reason }
+            );
+            recordError(
+                AUDIO_IR_LOADER_CODES.ABORTED,
+                "unknown",
+                performance.now() - started
+            );
+            throw err;
+        }
+        let family: IrFamily | "unknown" = "unknown";
+        let entry: ReturnType<IrRegistry["get"]>;
+        const tracer = getInstruments().tracer;
+        const span = tracer.startSpan("audio_ir_loader.load", {
+            attributes: { "audio_ir.id": id },
+        });
+        try {
+            entry = parsed.registry.get(id);
+            family = entry.family;
+            span.setAttribute("audio_ir.family", family);
+            span.setAttribute("audio_ir.uri_kind", uriKindOf(entry.uri));
+            if (cache !== undefined) {
+                const hit = cache.get(id);
+                if (hit !== undefined) {
+                    recordCacheHit(family, performance.now() - started);
+                    return hit;
+                }
+                recordCacheMiss(family);
+            }
+            const ext = extractExtension(entry.uri, id);
+            const decoder = decoders[ext];
+            if (decoder === undefined) {
+                throw new AudioIrLoaderError(
+                    AUDIO_IR_LOADER_CODES.DECODER_UNAVAILABLE,
+                    `no decoder registered for '.${ext}'`,
+                    { id, extension: ext }
+                );
+            }
+            const bytes = await parsed.resolver.read(entry.uri, signal);
+            const decoded = await decoder(
+                bytes,
+                signal !== undefined ? { signal } : undefined
+            );
+            const ir = validateAndFinalize(entry, decoded);
+            if (cache !== undefined) {
+                cache.put(id, ir);
+            }
+            const firstChannel = ir.channelData[0] as Float32Array;
+            recordSuccess(
+                family,
+                bytes.byteLength,
+                firstChannel.length,
+                performance.now() - started
+            );
+            return ir;
+        } catch (err) {
+            const code =
+                err instanceof SuaveplanError
+                    ? err.code
+                    : "AUDIO_IR_LOADER.UNKNOWN";
+            recordError(code, family, performance.now() - started);
+            throw err;
+        } finally {
+            span.end();
+        }
+    }
+
+    return {
+        load(id, loadOptions) {
+            return loadInternal(id, loadOptions);
+        },
+        preload(ids, preloadOptions) {
+            return runPreload(loadInternal, ids, preloadOptions);
+        },
+        evict(id) {
+            if (cache === undefined) return false;
+            return cache.evict(id);
+        },
+        cacheStats() {
+            if (cache === undefined) {
+                return { entries: 0, bytes: 0, hits: 0, misses: 0 };
+            }
+            return cache.stats();
+        },
+    };
+}

packages/media/audio-ir/audio-ir-loader/src/loader/manifest-validation.md

@@ -0,0 +1,88 @@
+# `manifest-validation.ts` — decoded audio ↔ manifest reconciliation
+
+## Purpose
+
+This module is the bridge between the `DecodedAudio` shape emitted by an
+`AudioDecoder` and the `ImpulseResponse` shape consumed by the convolver.
+It compares the decoded audio against the manifest entry's declared
+`channels` / `sampleRate`, throws `AUDIO_IR_LOADER.MANIFEST_MISMATCH` on
+any divergence, then applies the manifest's `gainDb` multiplicatively
+and returns a frozen `ImpulseResponse` ready to hand back to the caller.
+
+## Features
+
+- Exact-match enforcement for both `channels` and `sampleRate` — no
+  tolerance window (resampling is out-of-scope for this package).
+- `gainDb` applied via `10^(gainDb/20)` per sample. The `gainDb === 0`
+  fast-path skips the multiply and just copies the buffer to ensure the
+  resulting IR owns its memory.
+- Returns a fully frozen `ImpulseResponse` whose `manifest` reference
+  preserves the source entry.
+
+## Usage: Basic
+
+```ts
+import { validateAndFinalize } from "@suaveplan/audio-ir-loader";
+
+const ir = validateAndFinalize(entry, decodedAudio);
+console.log(ir.id, ir.lengthFrames, ir.durationSec);
+```
+
+## Usage: Advanced
+
+Operators routing on `MANIFEST_MISMATCH` errors can use the structured
+discriminants directly:
+
+```ts
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+    validateAndFinalize,
+} from "@suaveplan/audio-ir-loader";
+
+try {
+    return validateAndFinalize(entry, decoded);
+} catch (err) {
+    if (
+        err instanceof AudioIrLoaderError &&
+        err.code === AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH
+    ) {
+        metrics.recordMismatch({
+            id: err.id,
+            field: err.field, // "channels" | "sampleRate"
+            manifestValue: err.manifestValue,
+            decodedValue: err.decodedValue,
+        });
+    }
+    throw err;
+}
+```
+
+## API Reference
+
+### `validateAndFinalize(entry, decoded): ImpulseResponse`
+
+- `entry: IrManifestEntry` — the manifest entry resolved from the registry.
+- `decoded: DecodedAudioLike` — `{ channelData, sampleRate, channels }`.
+
+Throws `AUDIO_IR_LOADER.MANIFEST_MISMATCH` on `channels` or `sampleRate`
+divergence (with `field`, `manifestValue`, `decodedValue` discriminants).
+Returns a frozen `ImpulseResponse` whose `manifest` field is the input
+entry.
+
+### `DecodedAudioLike`
+
+Structural subset of `@suaveplan/audio-decode-wav`'s `DecodedAudio` —
+just the three fields manifest validation needs.
+
+## Implementation Notes
+
+The `gainDb === 0` short-circuit avoids both the `Math.pow` call and a
+floating-point pass over the buffer for the (very common) case where the
+manifest carries no gain offset; the per-sample copy is still performed
+because every channel buffer is wrapped in `new Float32Array(channel)`
+to give the resulting IR its own memory. The result is `Object.freeze`d
+at the outer level and the `channelData` array is frozen too; the
+individual `Float32Array` buffers cannot be `Object.freeze`d (TypedArray
+buffers reject the freeze) but the array-level freeze is enough to
+prevent callers from swapping channels at the array level.

packages/media/audio-ir/audio-ir-loader/src/loader/manifest-validation.test.ts

@@ -0,0 +1,126 @@
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { validateAndFinalize } from "./manifest-validation.js";
+
+const ENTRY = (overrides: Partial<IrManifestEntry> = {}): IrManifestEntry =>
+    Object.freeze({
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://x/club1.wav",
+        channels: 2,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+        ...overrides,
+    }) as IrManifestEntry;
+
+describe("validateAndFinalize", () => {
+    it("returns a frozen ImpulseResponse on a happy path", {
+        timeout: 5000,
+    }, () => {
+        const entry = ENTRY();
+        const decoded = {
+            channelData: [new Float32Array([1, 0]), new Float32Array([0, 1])],
+            channels: 2,
+            sampleRate: 44100,
+        };
+        const ir = validateAndFinalize(entry, decoded);
+        expect(Object.isFrozen(ir)).toBe(true);
+        expect(ir.id).toBe("club-club1");
+        expect(ir.channels).toBe(2);
+        expect(ir.sampleRate).toBe(44100);
+        expect(ir.lengthFrames).toBe(2);
+        expect(ir.manifest).toBe(entry);
+        // ChannelData should be a copy, not the original reference.
+        expect(ir.channelData[0]).not.toBe(decoded.channelData[0]);
+    });
+
+    it("throws MANIFEST_MISMATCH on channel-count divergence", {
+        timeout: 5000,
+    }, () => {
+        const entry = ENTRY({ channels: 2 });
+        const decoded = {
+            channelData: [new Float32Array([0])],
+            channels: 1,
+            sampleRate: 44100,
+        };
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            validateAndFinalize(entry, decoded);
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH);
+        expect(captured?.field).toBe("channels");
+        expect(captured?.manifestValue).toBe(2);
+        expect(captured?.decodedValue).toBe(1);
+    });
+
+    it("throws MANIFEST_MISMATCH on sample-rate divergence", {
+        timeout: 5000,
+    }, () => {
+        const entry = ENTRY({ channels: 1, sampleRate: 44100 });
+        const decoded = {
+            channelData: [new Float32Array([0])],
+            channels: 1,
+            sampleRate: 48000,
+        };
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            validateAndFinalize(entry, decoded);
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH);
+        expect(captured?.field).toBe("sampleRate");
+        expect(captured?.manifestValue).toBe(44100);
+        expect(captured?.decodedValue).toBe(48000);
+    });
+
+    it("applies gainDb multiplicatively", { timeout: 5000 }, () => {
+        const entry = ENTRY({ channels: 1, gainDb: -6.0206 });
+        const decoded = {
+            channelData: [new Float32Array([1.0])],
+            channels: 1,
+            sampleRate: 44100,
+        };
+        const ir = validateAndFinalize(entry, decoded);
+        const peak = (ir.channelData[0] as Float32Array)[0] as number;
+        expect(Math.abs(peak - 0.5)).toBeLessThan(1e-3);
+        expect(ir.manifest.gainDb).toBe(-6.0206);
+    });
+
+    it("gainDb=0 fast-path still copies the buffer", {
+        timeout: 5000,
+    }, () => {
+        const entry = ENTRY({ channels: 1, gainDb: 0 });
+        const orig = new Float32Array([0.25]);
+        const decoded = {
+            channelData: [orig],
+            channels: 1,
+            sampleRate: 44100,
+        };
+        const ir = validateAndFinalize(entry, decoded);
+        const out = ir.channelData[0] as Float32Array;
+        expect(out).not.toBe(orig);
+        expect(out[0]).toBe(0.25);
+    });
+
+    it("computes durationSec from lengthFrames / sampleRate", {
+        timeout: 5000,
+    }, () => {
+        const entry = ENTRY({ channels: 1, sampleRate: 22050 });
+        const decoded = {
+            channelData: [new Float32Array(22050)],
+            channels: 1,
+            sampleRate: 22050,
+        };
+        const ir = validateAndFinalize(entry, decoded);
+        expect(ir.durationSec).toBeCloseTo(1.0, 6);
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/loader/manifest-validation.ts

@@ -0,0 +1,91 @@
+import type {
+    ImpulseResponse,
+    IrManifestEntry,
+} from "@suaveplan/audio-ir-core";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+
+/** Minimal shape the loader consumes from `DecodedAudio`. */
+export interface DecodedAudioLike {
+    readonly channelData: readonly Float32Array[];
+    readonly sampleRate: number;
+    readonly channels: number;
+}
+
+/**
+ * Compare decoded audio against a manifest entry, apply `gainDb`, and
+ * return a frozen `ImpulseResponse`.
+ *
+ * Throws `AUDIO_IR_LOADER.MANIFEST_MISMATCH` when `channels` or
+ * `sampleRate` disagree. `gainDb` is applied multiplicatively:
+ * `sample * 10^(gainDb/20)`. The result's `manifest.gainDb` preserves
+ * the manifest's declared value so callers know what was applied.
+ */
+export function validateAndFinalize(
+    entry: IrManifestEntry,
+    decoded: DecodedAudioLike
+): ImpulseResponse {
+    if (decoded.channels !== entry.channels) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH,
+            `IR ${entry.id} manifest declares ${entry.channels} channel(s), decoded ${decoded.channels}`,
+            {
+                id: entry.id,
+                field: "channels",
+                manifestValue: entry.channels,
+                decodedValue: decoded.channels,
+            }
+        );
+    }
+    if (decoded.sampleRate !== entry.sampleRate) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH,
+            `IR ${entry.id} manifest declares ${entry.sampleRate} Hz, decoded ${decoded.sampleRate} Hz`,
+            {
+                id: entry.id,
+                field: "sampleRate",
+                manifestValue: entry.sampleRate,
+                decodedValue: decoded.sampleRate,
+            }
+        );
+    }
+    const gain = entry.gainDb === 0 ? 1 : 10 ** (entry.gainDb / 20);
+    const channelData: Float32Array[] = [];
+    for (const channel of decoded.channelData) {
+        if (gain === 1) {
+            // Copy regardless so the IR owns its buffer (the decoder may
+            // return frozen-but-shared buffers; mutating decoder output
+            // would be a footgun).
+            channelData.push(new Float32Array(channel));
+            continue;
+        }
+        const scaled = new Float32Array(channel.length);
+        for (let i = 0; i < channel.length; i++) {
+            // `channel[i]` is defined for i < length per Float32Array indexing.
+            const sample = channel[i] as number;
+            scaled[i] = sample * gain;
+        }
+        channelData.push(scaled);
+    }
+    const frozenChannels = Object.freeze(channelData);
+    // The first channel's length is canonical — the decoder is required
+    // to return equal-length channels, and the loader's downstream
+    // schema check would re-enforce it.
+    const firstChannel = channelData[0] as Float32Array;
+    const lengthFrames = firstChannel.length;
+    const durationSec = lengthFrames / entry.sampleRate;
+    const ir: ImpulseResponse = Object.freeze({
+        id: entry.id,
+        channelData: frozenChannels,
+        channels: entry.channels,
+        sampleRate: entry.sampleRate,
+        lengthFrames,
+        durationSec,
+        gainDb: entry.gainDb,
+        family: entry.family,
+        manifest: entry,
+    });
+    return ir;
+}

packages/media/audio-ir/audio-ir-loader/src/loader/preload.md

@@ -0,0 +1,82 @@
+# `preload.ts` — bounded-concurrency bulk load
+
+## Purpose
+
+This module implements the bounded-concurrency `preload` algorithm
+backing `IrLoader.preload`. It launches up to `concurrency` workers (each
+a `while`-loop that pops the next id off a shared cursor), threads the
+caller's `AbortSignal` through every per-id load, and produces either a
+fully-populated array of `ImpulseResponse` (in input order) on success
+or an aggregate `AUDIO_IR_LOADER.DECODE_FAILED` error carrying every
+per-id failure on partial failure.
+
+## Features
+
+- Concurrency clamped to `[1, 32]` to prevent caller mistakes from
+  saturating the runtime.
+- Input order preserved on success — the `results` array is indexed by
+  the id's position in `ids`, not by completion order.
+- Aggregate failure: every failing id is collected before the throw, so
+  callers get a complete picture rather than the first error.
+- Abort threading: workers stop launching new loads as soon as
+  `signal.aborted` becomes true; the throw is `ABORTED` not
+  `DECODE_FAILED`.
+
+## Usage: Basic
+
+```ts
+const irs = await loader.preload(
+    ["club-a", "club-b", "club-c"],
+    { concurrency: 2 }
+);
+```
+
+## Usage: Advanced
+
+The aggregate carries every failure for ergonomic dashboards:
+
+```ts
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "@suaveplan/audio-ir-loader";
+
+try {
+    await loader.preload(ids);
+} catch (err) {
+    if (err instanceof AudioIrLoaderError && err.errors !== undefined) {
+        for (const { id, error } of err.errors) {
+            metrics.recordLoadFailure({ id, code: error.code });
+        }
+    }
+    throw err;
+}
+```
+
+Best-effort callers that want to keep going past failures can call
+`Promise.allSettled(ids.map((id) => loader.load(id)))` directly.
+
+## API Reference
+
+### `runPreload(loadFn, ids, options?): Promise<readonly ImpulseResponse[]>`
+
+- `loadFn` — the per-id load function (the loader's closure).
+- `ids: readonly string[]` — input ids; order preserved on success.
+- `options.signal?: AbortSignal` — shared abort.
+- `options.concurrency?: number` — clamped to `[1, 32]`, default `4`.
+
+On full success returns a frozen `ImpulseResponse[]` in input order. On
+partial failure throws `AUDIO_IR_LOADER.DECODE_FAILED` with the failure
+list on `errors`. On signal abort throws `AUDIO_IR_LOADER.ABORTED`
+(carrying any pre-abort failures on `errors`).
+
+## Implementation Notes
+
+The worker pool is a simple "N parallel tasks, all draining a shared
+cursor" pattern. The cursor is captured in `takeNext()` which also checks
+abort state on entry, so a mid-flight abort halts every worker on its
+next iteration. Non-`SuaveplanError` throwables are wrapped as
+`AUDIO_IR_LOADER.RESOLVE_FAILED` before being added to the aggregate;
+this preserves the invariant that every entry in `errors[]` is a
+`SuaveplanError` (and therefore carries a stable `.code`). The success
+result is `Object.freeze`d so callers can't mutate the array in place.

packages/media/audio-ir/audio-ir-loader/src/loader/preload.test.ts

@@ -0,0 +1,279 @@
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+import {
+    createStorageUriResolver,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { afterEach, describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import { resetInstruments } from "../otel/otel.js";
+import { type AudioDecoder, createIrLoader } from "./loader.js";
+import { runPreload } from "./preload.js";
+
+const ENTRY = (
+    id: string,
+    overrides: Partial<IrManifestEntry> = {}
+): IrManifestEntry =>
+    ({
+        id,
+        family: "room",
+        uri: `bundle://x/${id}.wav`,
+        channels: 1,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+        ...overrides,
+    }) as IrManifestEntry;
+
+function buildSlowDecoder(
+    delayMs: number,
+    counter: { active: number; max: number }
+): AudioDecoder {
+    return async () => {
+        counter.active += 1;
+        counter.max = Math.max(counter.max, counter.active);
+        await new Promise((r) => setTimeout(r, delayMs));
+        counter.active -= 1;
+        return {
+            channelData: [new Float32Array([0])],
+            channels: 1,
+            sampleRate: 44100,
+        };
+    };
+}
+
+function buildHarness(ids: readonly string[]) {
+    const reads = new Map<string, Uint8Array>();
+    const plugin: UriPlugin = {
+        scheme: "bundle",
+        adapter: {
+            async get(key: string) {
+                return reads.get(key);
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key) {
+                return reads.has(key);
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            return { key: uri.replace(/^bundle:\/\//, "") };
+        },
+    };
+    const resolver = createStorageUriResolver([plugin]);
+    const registry = createIrRegistry();
+    for (const id of ids) {
+        registry.register(ENTRY(`club-${id}`), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set(`x/club-${id}.wav`, new Uint8Array([1]));
+    }
+    return { resolver, registry };
+}
+
+describe("preload concurrency, order, and aggregate failure", () => {
+    afterEach(() => {
+        resetInstruments();
+    });
+
+    it("honours concurrency cap", { timeout: 10000 }, async () => {
+        const counter = { active: 0, max: 0 };
+        const { resolver, registry } = buildHarness([
+            "a",
+            "b",
+            "c",
+            "d",
+            "e",
+            "f",
+        ]);
+        const decoder = buildSlowDecoder(10, counter);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        await loader.preload(
+            ["club-a", "club-b", "club-c", "club-d", "club-e", "club-f"],
+            { concurrency: 2 }
+        );
+        expect(counter.max).toBeLessThanOrEqual(2);
+    });
+
+    it("preserves input order on success", {
+        timeout: 5000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const ids = ["a", "b", "c"];
+        const { resolver, registry } = buildHarness(ids);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: buildSlowDecoder(5, counter) },
+        });
+        const input = ["club-a", "club-b", "club-c"];
+        const out = await loader.preload(input);
+        expect(out.map((ir) => ir.id)).toEqual(input);
+    });
+
+    it("rejects with aggregate on partial failure", {
+        timeout: 5000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const ids = ["a", "b", "c"];
+        const { resolver, registry } = buildHarness(ids);
+        // Decoder returns mismatched channel count for `b`.
+        const decoder: AudioDecoder = async (_bytes) => ({
+            channelData: [new Float32Array([0])],
+            channels: 1,
+            sampleRate: 44100,
+        });
+        const flakyDecoder: AudioDecoder = async (_bytes, opts) => {
+            // Inspect a side channel via stack — simpler: keep counter to fail on second call.
+            counter.active += 1;
+            if (counter.active === 2) {
+                return {
+                    channelData: [new Float32Array([0])],
+                    channels: 2,
+                    sampleRate: 44100,
+                };
+            }
+            return decoder(_bytes, opts);
+        };
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: flakyDecoder },
+        });
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.preload(["club-a", "club-b", "club-c"], {
+                concurrency: 1,
+            });
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODE_FAILED);
+        expect(captured?.errors?.length).toBe(1);
+        expect(captured?.errors?.[0]?.id).toBe("club-b");
+        expect(captured?.errors?.[0]?.error.code).toBe(
+            AUDIO_IR_LOADER_CODES.MANIFEST_MISMATCH
+        );
+    });
+
+    it("preload stops launching new loads after abort", {
+        timeout: 10000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const { resolver, registry } = buildHarness(["a", "b", "c", "d"]);
+        let launches = 0;
+        const decoder: AudioDecoder = async () => {
+            launches += 1;
+            await new Promise((r) => setTimeout(r, 50));
+            return {
+                channelData: [new Float32Array([0])],
+                channels: 1,
+                sampleRate: 44100,
+            };
+        };
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        const controller = new AbortController();
+        const promise = loader.preload(
+            ["club-a", "club-b", "club-c", "club-d"],
+            { signal: controller.signal, concurrency: 2 }
+        );
+        // Fire abort after a short delay so the first two finish but the
+        // last two are never launched.
+        setTimeout(() => controller.abort(new Error("test abort")), 30);
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await promise;
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.ABORTED);
+        // counter is unused for this assertion; tests on `launches` upper bound.
+        expect(launches).toBeLessThan(4);
+        // Touch counter to silence the unused-variable lint when running through Biome.
+        void counter;
+    });
+
+    it("clamps requested concurrency to [1, 32]", {
+        timeout: 5000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const { resolver, registry } = buildHarness(["a"]);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: buildSlowDecoder(1, counter) },
+        });
+        const out = await loader.preload(["club-a"], { concurrency: 9999 });
+        expect(out.length).toBe(1);
+    });
+
+    it("default concurrency (no option) is honoured", {
+        timeout: 5000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const ids = ["a", "b"];
+        const { resolver, registry } = buildHarness(ids);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: buildSlowDecoder(1, counter) },
+        });
+        const out = await loader.preload(["club-a", "club-b"]);
+        expect(out.length).toBe(2);
+    });
+
+    it("wraps non-SuaveplanError throwables as RESOLVE_FAILED in the aggregate", {
+        timeout: 5000,
+    }, async () => {
+        const badLoader = async (_id: string) => {
+            throw new TypeError("plain error");
+        };
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await runPreload(badLoader, ["x"], undefined);
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        expect(captured?.code).toBe(AUDIO_IR_LOADER_CODES.DECODE_FAILED);
+        expect(captured?.errors?.[0]?.error.code).toBe(
+            AUDIO_IR_LOADER_CODES.RESOLVE_FAILED
+        );
+    });
+
+    it("clamps requested concurrency 0 up to 1", {
+        timeout: 5000,
+    }, async () => {
+        const counter = { active: 0, max: 0 };
+        const { resolver, registry } = buildHarness(["a"]);
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: buildSlowDecoder(1, counter) },
+        });
+        const out = await loader.preload(["club-a"], { concurrency: 0 });
+        expect(out.length).toBe(1);
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/loader/preload.ts

@@ -0,0 +1,108 @@
+import type { ImpulseResponse } from "@suaveplan/audio-ir-core";
+import { SuaveplanError } from "@suaveplan/error";
+import {
+    type AggregatedLoadFailure,
+    AUDIO_IR_LOADER_CODES,
+    AudioIrLoaderError,
+} from "../error-codes/error-codes.js";
+import type { LoadOptions, PreloadOptions } from "./loader.js";
+
+const MIN_CONCURRENCY = 1;
+const MAX_CONCURRENCY = 32;
+const DEFAULT_CONCURRENCY = 4;
+
+type LoadFn = (
+    id: string,
+    options: LoadOptions | undefined
+) => Promise<ImpulseResponse>;
+
+/**
+ * Execute `loadFn` against every id in `ids` with at most `concurrency`
+ * in-flight at any time. On full success returns the resulting array in
+ * input order; on any failure rejects with an aggregate
+ * `AUDIO_IR_LOADER.DECODE_FAILED` carrying every per-id error.
+ *
+ * If the supplied signal is aborted mid-flight, the function stops
+ * launching new loads and rejects with `AUDIO_IR_LOADER.ABORTED`
+ * (preserving any per-id errors already captured).
+ */
+export async function runPreload(
+    loadFn: LoadFn,
+    ids: readonly string[],
+    options: PreloadOptions | undefined
+): Promise<readonly ImpulseResponse[]> {
+    const requested = options?.concurrency ?? DEFAULT_CONCURRENCY;
+    const concurrency = Math.min(
+        Math.max(Math.floor(requested), MIN_CONCURRENCY),
+        MAX_CONCURRENCY
+    );
+    const signal = options?.signal;
+    const results: (ImpulseResponse | undefined)[] = new Array(ids.length);
+    const failures: AggregatedLoadFailure[] = [];
+    let nextIndex = 0;
+
+    function takeNext(): { index: number; id: string } | undefined {
+        if (signal?.aborted === true) return undefined;
+        if (nextIndex >= ids.length) return undefined;
+        const index = nextIndex;
+        nextIndex += 1;
+        const id = ids[index] as string;
+        return { index, id };
+    }
+
+    async function worker(): Promise<void> {
+        for (;;) {
+            const next = takeNext();
+            if (next === undefined) return;
+            try {
+                const ir = await loadFn(
+                    next.id,
+                    signal !== undefined ? { signal } : undefined
+                );
+                results[next.index] = ir;
+            } catch (err) {
+                if (err instanceof SuaveplanError) {
+                    failures.push({ id: next.id, error: err });
+                } else {
+                    // Non-namespaced throwables are wrapped so the
+                    // aggregate carries a SuaveplanError on every entry.
+                    // Always carry the offending throwable on `cause` —
+                    // the SuaveplanError options bag accepts any value
+                    // and preserving it loses no information.
+                    const wrapped = new AudioIrLoaderError(
+                        AUDIO_IR_LOADER_CODES.RESOLVE_FAILED,
+                        `preload of ${next.id} threw a non-SuaveplanError`,
+                        { id: next.id, cause: err }
+                    );
+                    failures.push({ id: next.id, error: wrapped });
+                }
+            }
+        }
+    }
+
+    const workers: Promise<void>[] = [];
+    for (let i = 0; i < concurrency; i++) {
+        workers.push(worker());
+    }
+    await Promise.all(workers);
+
+    if (signal?.aborted === true) {
+        // `AbortSignal.reason` is always defined after an `abort()` call
+        // (the platform synthesises a `DOMException` when no explicit
+        // reason was supplied), so pass it through unconditionally.
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.ABORTED,
+            "preload aborted",
+            { cause: signal.reason, errors: failures }
+        );
+    }
+    if (failures.length > 0) {
+        throw new AudioIrLoaderError(
+            AUDIO_IR_LOADER_CODES.DECODE_FAILED,
+            `preload failed for ${failures.length} of ${ids.length} ids`,
+            { errors: failures }
+        );
+    }
+    // All slots populated — narrow to `ImpulseResponse[]` for the caller.
+    return Object.freeze(results.map((r) => r as ImpulseResponse));
+}

packages/media/audio-ir/audio-ir-loader/src/otel/index.ts

@@ -0,0 +1,14 @@
+export type {
+    AudioIrLoaderInstruments,
+    AudioIrLoaderLoadOutcome,
+} from "./otel.js";
+export {
+    getInstruments,
+    recordCacheHit,
+    recordCacheMiss,
+    recordError,
+    recordSuccess,
+    resetInstruments,
+    setAudioIrLoaderMeterProvider,
+    uriKindOf,
+} from "./otel.js";

packages/media/audio-ir/audio-ir-loader/src/otel/otel.md

@@ -0,0 +1,114 @@
+# `otel.ts` — OpenTelemetry surface for `audio-ir-loader`
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module owns the loader's OpenTelemetry instrumentation. It lazily
+builds a single, cached `AudioIrLoaderInstruments` bag bound to either the
+global `MeterProvider` or a per-process override installed via
+`setAudioIrLoaderMeterProvider`. The bag carries every counter and
+histogram the spec requires (`bytes_read_total`, `frames_out_total`,
+`cache_hits_total`, `cache_misses_total`, `errors_total`, plus the
+`load_duration_ms` histogram).
+
+The split between this module and the loader/cache modules is deliberate:
+all metric definitions live here so dashboards can grep for instrument
+names in one place, and the loader/cache modules call recorder helpers
+(`recordSuccess`, `recordCacheHit`, `recordCacheMiss`, `recordError`)
+that close over the cached bag.
+
+## Features
+
+- Real `MeterProvider` override for tests — no mocks; tests install an
+  in-memory recorder via `setAudioIrLoaderMeterProvider`.
+- Histogram + five counters covering success / cache-hit / cache-miss /
+  error outcomes.
+- Span-attribute helper `uriKindOf(uri)` resolves the `audio_ir.uri_kind`
+  dimension from a URI's scheme without re-parsing the whole URI.
+
+## Usage: Basic
+
+```ts
+import {
+    recordSuccess,
+    setAudioIrLoaderMeterProvider,
+} from "@suaveplan/audio-ir-loader";
+import { metrics } from "@opentelemetry/api";
+
+// In an app bootstrap:
+setAudioIrLoaderMeterProvider(metrics.getMeterProvider());
+recordSuccess("room", 100000, 25000, 12.5);
+```
+
+## Usage: Advanced
+
+Tests install a real in-memory provider that records every observation:
+
+```ts
+import {
+    getInstruments,
+    setAudioIrLoaderMeterProvider,
+} from "@suaveplan/audio-ir-loader";
+import type { MeterProvider } from "@opentelemetry/api";
+
+const observed: { name: string; value: number; attrs: Record<string, unknown> }[] = [];
+const provider = {
+    getMeter: () => ({
+        createCounter: (name: string) => ({
+            add: (v: number, a?: Record<string, unknown>) =>
+                observed.push({ name, value: v, attrs: a ?? {} }),
+        }),
+        createHistogram: (name: string) => ({
+            record: (v: number, a?: Record<string, unknown>) =>
+                observed.push({ name, value: v, attrs: a ?? {} }),
+        }),
+    }),
+} as unknown as MeterProvider;
+setAudioIrLoaderMeterProvider(provider);
+getInstruments(true);
+```
+
+## API Reference
+
+### `setAudioIrLoaderMeterProvider(provider | undefined): void`
+
+Install a meter provider override. Pass `undefined` to revert.
+
+### `getInstruments(force?: boolean): AudioIrLoaderInstruments`
+
+Lazily builds (and caches) the instrument bag.
+
+### `resetInstruments(): void`
+
+Drops the cache — used between test provider swaps.
+
+### `recordSuccess(family, bytes, frames, durationMs): void`
+
+Increments `bytes_read_total{family}` and `frames_out_total{family}`, then
+records `load_duration_ms{family, outcome:"success"}`.
+
+### `recordCacheHit(family, durationMs): void` / `recordCacheMiss(family): void`
+
+Counter + duration bookkeeping for cache outcomes.
+
+### `recordError(code, family, durationMs): void`
+
+Increments `errors_total{code}` and records the duration with
+`outcome:"error"`.
+
+### `uriKindOf(uri): "bundle" | "fallback" | "https" | "drive" | "other"`
+
+Maps a URI's leading scheme to the span-attribute dimension.
+
+## Implementation Notes
+
+The cached instrument bag is rebuilt every time `setAudioIrLoaderMeterProvider`
+swaps the provider — otherwise tests would observe stale instruments
+bound to the previous provider's meter. The `force` parameter on
+`getInstruments` exists exclusively to let tests immediately rebind
+after `setAudioIrLoaderMeterProvider` to avoid a wasted check on the
+next call. `uriKindOf` deliberately treats `http` and `https` identically
+because callers care about the on-the-wire transport, not the TLS bit.

packages/media/audio-ir/audio-ir-loader/src/otel/otel.test.ts

@@ -0,0 +1,319 @@
+import type { MeterProvider } from "@opentelemetry/api";
+import type { IrManifestEntry } from "@suaveplan/audio-ir-core";
+import { createIrRegistry } from "@suaveplan/audio-ir-core";
+import {
+    createStorageUriResolver,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { afterEach, describe, expect, it } from "@suaveplan/testing/runner";
+import { AudioIrLoaderError } from "../error-codes/error-codes.js";
+import { type AudioDecoder, createIrLoader } from "../loader/loader.js";
+import {
+    getInstruments,
+    recordCacheHit,
+    recordCacheMiss,
+    recordError,
+    recordSuccess,
+    resetInstruments,
+    setAudioIrLoaderMeterProvider,
+    uriKindOf,
+} from "./otel.js";
+
+interface CounterObs {
+    readonly name: string;
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+interface HistogramObs {
+    readonly name: string;
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+
+interface Recorder {
+    readonly counters: CounterObs[];
+    readonly histograms: HistogramObs[];
+}
+
+function installRecorder(): Recorder {
+    const counters: CounterObs[] = [];
+    const histograms: HistogramObs[] = [];
+    const provider = {
+        getMeter: () => ({
+            createCounter: (name: string) => ({
+                add: (value: number, attrs?: Record<string, unknown>) => {
+                    counters.push({ name, value, attributes: attrs ?? {} });
+                },
+            }),
+            createHistogram: (name: string) => ({
+                record: (value: number, attrs?: Record<string, unknown>) => {
+                    histograms.push({ name, value, attributes: attrs ?? {} });
+                },
+            }),
+        }),
+    } as unknown as MeterProvider;
+    setAudioIrLoaderMeterProvider(provider);
+    getInstruments(true);
+    return { counters, histograms };
+}
+
+function uninstall(): void {
+    setAudioIrLoaderMeterProvider(undefined);
+    resetInstruments();
+}
+
+const ENTRY = (overrides: Partial<IrManifestEntry> = {}): IrManifestEntry =>
+    ({
+        id: "club-club1",
+        family: "room",
+        uri: "bundle://x/club1.wav",
+        channels: 1,
+        sampleRate: 44100,
+        gainDb: 0,
+        license: "MIT",
+        source: "demo",
+        ...overrides,
+    }) as IrManifestEntry;
+
+function harness() {
+    const reads = new Map<string, Uint8Array>();
+    const plugin: UriPlugin = {
+        scheme: "bundle",
+        adapter: {
+            async get(key: string) {
+                return reads.get(key);
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key) {
+                return reads.has(key);
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            return { key: uri.replace(/^bundle:\/\//, "") };
+        },
+    };
+    const resolver = createStorageUriResolver([plugin]);
+    const registry = createIrRegistry();
+    return { resolver, registry, reads };
+}
+
+describe("audio-ir-loader OTel surface (helpers)", () => {
+    afterEach(() => uninstall());
+
+    it("recordSuccess records bytes_read_total + frames_out_total + duration", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        recordSuccess("room", 100000, 25000, 12.5);
+        const bytes = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.bytes_read_total" &&
+                c.attributes["family"] === "room"
+        );
+        const frames = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.frames_out_total" &&
+                c.attributes["family"] === "room"
+        );
+        const duration = rec.histograms.find(
+            (h) =>
+                h.name === "audio_ir_loader.load_duration_ms" &&
+                h.attributes["family"] === "room" &&
+                h.attributes["outcome"] === "success"
+        );
+        expect(bytes?.value).toBe(100000);
+        expect(frames?.value).toBe(25000);
+        expect(duration?.value).toBe(12.5);
+    });
+
+    it("recordCacheHit increments cache_hits_total + cache_hit duration", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        recordCacheHit("room", 0.5);
+        const hit = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.cache_hits_total" &&
+                c.attributes["family"] === "room"
+        );
+        const dur = rec.histograms.find(
+            (h) => h.attributes["outcome"] === "cache_hit"
+        );
+        expect(hit?.value).toBe(1);
+        expect(dur?.value).toBe(0.5);
+    });
+
+    it("recordCacheMiss increments cache_misses_total", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        recordCacheMiss("speaker");
+        const miss = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.cache_misses_total" &&
+                c.attributes["family"] === "speaker"
+        );
+        expect(miss?.value).toBe(1);
+    });
+
+    it("recordError increments errors_total{code} + error duration", {
+        timeout: 5000,
+    }, () => {
+        const rec = installRecorder();
+        recordError("AUDIO_IR.NOT_REGISTERED", "unknown", 7.0);
+        const err = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.errors_total" &&
+                c.attributes["code"] === "AUDIO_IR.NOT_REGISTERED"
+        );
+        expect(err?.value).toBe(1);
+    });
+
+    it("getInstruments returns cached instance without force", {
+        timeout: 5000,
+    }, () => {
+        installRecorder();
+        const a = getInstruments();
+        const b = getInstruments();
+        expect(a).toBe(b);
+    });
+
+    it("setAudioIrLoaderMeterProvider(undefined) reverts to global provider", {
+        timeout: 5000,
+    }, () => {
+        installRecorder();
+        setAudioIrLoaderMeterProvider(undefined);
+        // Subsequent recordSuccess still works (no-op meter).
+        recordSuccess("room", 1, 1, 1);
+    });
+
+    it("uriKindOf classifies known schemes", { timeout: 5000 }, () => {
+        expect(uriKindOf("bundle://x/y.wav")).toBe("bundle");
+        expect(uriKindOf("fallback://?u=x")).toBe("fallback");
+        expect(uriKindOf("https://h/x")).toBe("https");
+        expect(uriKindOf("http://h/x")).toBe("https");
+        expect(uriKindOf("drive://share/x")).toBe("drive");
+        expect(uriKindOf("file:/path")).toBe("other");
+        expect(uriKindOf("garbage")).toBe("other");
+    });
+});
+
+describe("audio-ir-loader OTel surface (end-to-end)", () => {
+    afterEach(() => uninstall());
+
+    it("records load_duration_ms and bytes_read_total on success", {
+        timeout: 5000,
+    }, async () => {
+        const rec = installRecorder();
+        const { resolver, registry, reads } = harness();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array(100));
+        const decoder: AudioDecoder = async () => ({
+            channelData: [new Float32Array(25)],
+            channels: 1,
+            sampleRate: 44100,
+        });
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+        });
+        await loader.load("club-club1");
+        const bytes = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.bytes_read_total" &&
+                c.attributes["family"] === "room"
+        );
+        const frames = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.frames_out_total" &&
+                c.attributes["family"] === "room"
+        );
+        const dur = rec.histograms.find(
+            (h) =>
+                h.name === "audio_ir_loader.load_duration_ms" &&
+                h.attributes["outcome"] === "success"
+        );
+        expect(bytes?.value).toBe(100);
+        expect(frames?.value).toBe(25);
+        expect(dur).toBeDefined();
+    });
+
+    it("increments cache_hits_total on cache hit", {
+        timeout: 5000,
+    }, async () => {
+        const rec = installRecorder();
+        const { resolver, registry, reads } = harness();
+        registry.register(ENTRY(), {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        reads.set("x/club1.wav", new Uint8Array([1]));
+        const decoder: AudioDecoder = async () => ({
+            channelData: [new Float32Array([0])],
+            channels: 1,
+            sampleRate: 44100,
+        });
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decoder },
+            cache: { maxBytes: 4096 },
+        });
+        await loader.load("club-club1");
+        await loader.load("club-club1");
+        const hits = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.cache_hits_total" &&
+                c.attributes["family"] === "room"
+        );
+        expect(hits?.value).toBe(1);
+    });
+
+    it("increments errors_total with the resolved code from any namespace", {
+        timeout: 5000,
+    }, async () => {
+        const rec = installRecorder();
+        const { resolver, registry } = harness();
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: {
+                wav: (async () => ({
+                    channelData: [new Float32Array([0])],
+                    channels: 1,
+                    sampleRate: 44100,
+                })) as AudioDecoder,
+            },
+        });
+        let captured: AudioIrLoaderError | undefined;
+        try {
+            await loader.load("nope");
+        } catch (err) {
+            if (err instanceof AudioIrLoaderError) captured = err;
+        }
+        // The throw is AUDIO_IR.NOT_REGISTERED (an AudioIrError), not a loader error.
+        // No need to assert captured here — we're checking the counter only.
+        void captured;
+        const err = rec.counters.find(
+            (c) =>
+                c.name === "audio_ir_loader.errors_total" &&
+                c.attributes["code"] === "AUDIO_IR.NOT_REGISTERED"
+        );
+        expect(err).toBeDefined();
+    });
+});

packages/media/audio-ir/audio-ir-loader/src/otel/otel.ts

@@ -0,0 +1,146 @@
+import {
+    type Counter,
+    type Histogram,
+    type Meter,
+    type MeterProvider,
+    metrics,
+    type Tracer,
+    trace,
+} from "@opentelemetry/api";
+import type { IrFamily } from "@suaveplan/audio-ir-core";
+
+const METER_NAME = "@suaveplan/audio-ir-loader";
+const TRACER_NAME = "@suaveplan/audio-ir-loader";
+
+let overrideMeterProvider: MeterProvider | undefined;
+
+/**
+ * Override the meter provider used to acquire instruments. Pass
+ * `undefined` to revert to the global provider. Resets the cached
+ * instrument bag so the next access binds to the new provider.
+ */
+export function setAudioIrLoaderMeterProvider(
+    provider: MeterProvider | undefined
+): void {
+    overrideMeterProvider = provider;
+    cachedInstruments = undefined;
+}
+
+/** Load-outcome label used on `audio_ir_loader.load_duration_ms`. */
+export type AudioIrLoaderLoadOutcome = "success" | "cache_hit" | "error";
+
+export interface AudioIrLoaderInstruments {
+    readonly tracer: Tracer;
+    readonly meter: Meter;
+    readonly loadDurationMs: Histogram;
+    readonly bytesReadTotal: Counter;
+    readonly framesOutTotal: Counter;
+    readonly cacheHitsTotal: Counter;
+    readonly cacheMissesTotal: Counter;
+    readonly errorsTotal: Counter;
+}
+
+let cachedInstruments: AudioIrLoaderInstruments | undefined;
+
+/** Lazily build (or return cached) instruments bound to the active provider. */
+export function getInstruments(force = false): AudioIrLoaderInstruments {
+    if (cachedInstruments !== undefined && !force) return cachedInstruments;
+    const tracer = trace.getTracer(TRACER_NAME);
+    const meter = (overrideMeterProvider ?? metrics).getMeter(METER_NAME);
+    cachedInstruments = {
+        tracer,
+        meter,
+        loadDurationMs: meter.createHistogram(
+            "audio_ir_loader.load_duration_ms",
+            {
+                description:
+                    "End-to-end load duration in ms; labels: family, outcome",
+                unit: "ms",
+            }
+        ),
+        bytesReadTotal: meter.createCounter(
+            "audio_ir_loader.bytes_read_total",
+            {
+                description: "Raw bytes read from the resolver; labels: family",
+            }
+        ),
+        framesOutTotal: meter.createCounter(
+            "audio_ir_loader.frames_out_total",
+            {
+                description: "Decoded frame count per channel; labels: family",
+            }
+        ),
+        cacheHitsTotal: meter.createCounter(
+            "audio_ir_loader.cache_hits_total",
+            {
+                description: "LRU cache hits; labels: family",
+            }
+        ),
+        cacheMissesTotal: meter.createCounter(
+            "audio_ir_loader.cache_misses_total",
+            {
+                description: "LRU cache misses; labels: family",
+            }
+        ),
+        errorsTotal: meter.createCounter("audio_ir_loader.errors_total", {
+            description:
+                "Every error thrown by the loader; labels: code (fully-qualified)",
+        }),
+    };
+    return cachedInstruments;
+}
+
+/** Reset cached instruments — used by tests between provider swaps. */
+export function resetInstruments(): void {
+    cachedInstruments = undefined;
+}
+
+/** Increment `bytes_read_total{family}` by `bytes` and `frames_out_total{family}` by `frames`. */
+export function recordSuccess(
+    family: IrFamily,
+    bytes: number,
+    frames: number,
+    durationMs: number
+): void {
+    const inst = getInstruments();
+    inst.bytesReadTotal.add(bytes, { family });
+    inst.framesOutTotal.add(frames, { family });
+    inst.loadDurationMs.record(durationMs, { family, outcome: "success" });
+}
+
+/** Record a cache hit + the (very short) duration the hit cost. */
+export function recordCacheHit(family: IrFamily, durationMs: number): void {
+    const inst = getInstruments();
+    inst.cacheHitsTotal.add(1, { family });
+    inst.loadDurationMs.record(durationMs, { family, outcome: "cache_hit" });
+}
+
+/** Record a cache miss. */
+export function recordCacheMiss(family: IrFamily): void {
+    getInstruments().cacheMissesTotal.add(1, { family });
+}
+
+/** Increment `errors_total{code}` and record duration with `outcome=error`. */
+export function recordError(
+    code: string,
+    family: IrFamily | "unknown",
+    durationMs: number
+): void {
+    const inst = getInstruments();
+    inst.errorsTotal.add(1, { code });
+    inst.loadDurationMs.record(durationMs, { family, outcome: "error" });
+}
+
+/** Derive `audio_ir.uri_kind` span attribute from a URI's leading scheme. */
+export function uriKindOf(
+    uri: string
+): "bundle" | "fallback" | "https" | "drive" | "other" {
+    const colon = uri.indexOf(":");
+    if (colon <= 0) return "other";
+    const scheme = uri.slice(0, colon).toLowerCase();
+    if (scheme === "bundle") return "bundle";
+    if (scheme === "fallback") return "fallback";
+    if (scheme === "https" || scheme === "http") return "https";
+    if (scheme === "drive") return "drive";
+    return "other";
+}

packages/media/audio-ir/audio-ir-loader/tests/integration/with-bundle-fallback.test.ts

@@ -0,0 +1,280 @@
+import { mkdir, mkdtemp, rm } from "node:fs/promises";
+import { createServer, type Server } from "node:http";
+import type { AddressInfo } from "node:net";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import type { MeterProvider } from "@opentelemetry/api";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import {
+    createIrRegistry,
+    type IrManifestEntry,
+} from "@suaveplan/audio-ir-core";
+import {
+    createStorageUriResolver,
+    STORAGE_URI_CODES,
+    StorageUriError,
+    type UriPlugin,
+} from "@suaveplan/storage-uri";
+import { bundleUriPlugin } from "@suaveplan/storage-uri-plugin-bundle";
+import {
+    buildFallbackUri,
+    fallbackUriPlugin,
+    resetFallbackInstruments,
+    setFallbackMeterProvider,
+} from "@suaveplan/storage-uri-plugin-fallback";
+import {
+    afterAll,
+    beforeAll,
+    describe,
+    expect,
+    it,
+} from "@suaveplan/testing/runner";
+import { createIrLoader } from "../../src/index.js";
+import {
+    getInstruments,
+    resetInstruments,
+    setAudioIrLoaderMeterProvider,
+} from "../../src/otel/otel.js";
+
+interface CounterObs {
+    readonly name: string;
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+interface HistogramObs {
+    readonly name: string;
+    readonly value: number;
+    readonly attributes: Record<string, unknown>;
+}
+
+/**
+ * In-test minimal `http`/`https` `UriPlugin` adapter wrapping
+ * `globalThis.fetch`. Lives in the test file by design — there is no
+ * shipped storage-uri plugin for HTTPS yet, and the integration test
+ * must not introduce a new published package.
+ */
+function makeHttpPlugin(scheme: "http" | "https"): UriPlugin {
+    return {
+        scheme,
+        adapter: {
+            async get(key: string) {
+                const url = `${scheme}://${key}`;
+                const res = await fetch(url);
+                if (res.status === 404) return undefined;
+                if (!res.ok) {
+                    throw new StorageUriError(
+                        STORAGE_URI_CODES.ADAPTER_ERROR,
+                        `HTTP ${res.status} from ${url}`,
+                        { uri: url, scheme }
+                    );
+                }
+                return new Uint8Array(await res.arrayBuffer());
+            },
+            async set() {
+                return;
+            },
+            async delete() {
+                return true;
+            },
+            async exists(key: string) {
+                const url = `${scheme}://${key}`;
+                const res = await fetch(url, { method: "HEAD" });
+                return res.ok;
+            },
+            async list() {
+                return { keys: [], total: 0, hasMore: false };
+            },
+            async clear() {
+                return;
+            },
+        },
+        parse(uri: string) {
+            const noScheme = uri.replace(new RegExp(`^${scheme}://`), "");
+            return { key: noScheme };
+        },
+    };
+}
+
+/** Minimal RIFF/WAVE 16-bit mono PCM builder for the integration fixture. */
+function buildSilentWav(
+    sampleRate: number,
+    samplesPerChannel: number
+): Uint8Array {
+    const dataBytes = samplesPerChannel * 2;
+    const buf = new Uint8Array(44 + dataBytes);
+    const dv = new DataView(buf.buffer);
+    const writeAscii = (off: number, s: string) => {
+        for (let i = 0; i < s.length; i++) buf[off + i] = s.charCodeAt(i);
+    };
+    writeAscii(0, "RIFF");
+    dv.setUint32(4, 36 + dataBytes, true);
+    writeAscii(8, "WAVE");
+    writeAscii(12, "fmt ");
+    dv.setUint32(16, 16, true);
+    dv.setUint16(20, 1, true); // PCM
+    dv.setUint16(22, 1, true); // mono
+    dv.setUint32(24, sampleRate, true);
+    dv.setUint32(28, sampleRate * 2, true);
+    dv.setUint16(32, 2, true);
+    dv.setUint16(34, 16, true);
+    writeAscii(36, "data");
+    dv.setUint32(40, dataBytes, true);
+    // body left as silence (zeros) — sufficient for the decode happy path.
+    return buf;
+}
+
+function installCombinedRecorder(): {
+    counters: CounterObs[];
+    histograms: HistogramObs[];
+} {
+    const counters: CounterObs[] = [];
+    const histograms: HistogramObs[] = [];
+    const provider = {
+        getMeter: () => ({
+            createCounter: (name: string) => ({
+                add: (value: number, attrs?: Record<string, unknown>) => {
+                    counters.push({ name, value, attributes: attrs ?? {} });
+                },
+            }),
+            createHistogram: (name: string) => ({
+                record: (value: number, attrs?: Record<string, unknown>) => {
+                    histograms.push({ name, value, attributes: attrs ?? {} });
+                },
+            }),
+            createObservableGauge: () => ({
+                addCallback: () => {},
+            }),
+        }),
+    } as unknown as MeterProvider;
+    setAudioIrLoaderMeterProvider(provider);
+    setFallbackMeterProvider(provider);
+    getInstruments(true);
+    return { counters, histograms };
+}
+
+interface Harness {
+    server: Server;
+    port: number;
+    tempDir: string;
+}
+
+let harness: Harness | undefined;
+
+beforeAll(async () => {
+    const tempDir = await mkdtemp(join(tmpdir(), "audio-ir-loader-test-"));
+    // Create a club/ subdirectory but DON'T put missing.wav in it — so the
+    // bundle adapter's GET for `bundle://club/missing.wav` will surface a
+    // local-file 404 from the file:// URL.
+    await mkdir(join(tempDir, "club"), { recursive: true });
+    const wavBytes = buildSilentWav(44100, 32);
+    // Stand up a node:http server that serves /club1.wav with the WAV bytes
+    // and 404 for everything else.
+    const server = createServer((req, res) => {
+        if (req.url === "/club1.wav") {
+            res.writeHead(200, { "Content-Type": "audio/wav" });
+            res.end(Buffer.from(wavBytes));
+            return;
+        }
+        res.writeHead(404);
+        res.end();
+    });
+    await new Promise<void>((resolve) =>
+        server.listen(0, "127.0.0.1", resolve)
+    );
+    const port = (server.address() as AddressInfo).port;
+    harness = { server, port, tempDir };
+}, 30000);
+
+afterAll(async () => {
+    if (harness !== undefined) {
+        await new Promise<void>((resolve, reject) =>
+            harness!.server.close((err) => (err ? reject(err) : resolve()))
+        );
+        await rm(harness.tempDir, { recursive: true, force: true });
+    }
+    setAudioIrLoaderMeterProvider(undefined);
+    setFallbackMeterProvider(undefined);
+    resetInstruments();
+    resetFallbackInstruments();
+}, 30000);
+
+describe("integration: bundle-then-http fallback walk", () => {
+    it("bundle misses fall back to HTTPS and load succeeds end-to-end", {
+        timeout: 30000,
+    }, async () => {
+        if (harness === undefined) throw new Error("harness not initialised");
+        const rec = installCombinedRecorder();
+
+        // Build a UriPlugin set: bundle:// rooted at the tempDir (no
+        // missing.wav exists), http:// via the in-test plugin.
+        // The fallback plugin builds a resolver-of-resolvers chain; the
+        // inner resolver must include bundle + http.
+        const innerBundle = bundleUriPlugin({
+            packageSlug: "club",
+            rootUrl: new URL(`file://${harness.tempDir}/`),
+        });
+        const innerHttp = makeHttpPlugin("http");
+        const innerResolver = createStorageUriResolver([
+            innerBundle,
+            innerHttp,
+        ]);
+        const fbPlugin = fallbackUriPlugin({
+            resolver: innerResolver,
+            policy: { errorClass: "any" },
+        });
+        const outerResolver = createStorageUriResolver([
+            innerBundle,
+            innerHttp,
+            fbPlugin,
+        ]);
+
+        const bundleUri = "bundle://club/missing.wav";
+        const httpUri = `http://127.0.0.1:${harness.port}/club1.wav`;
+        const fallbackUri = buildFallbackUri([bundleUri, httpUri]);
+
+        const entry: IrManifestEntry = {
+            id: "club-pool",
+            family: "room",
+            uri: fallbackUri,
+            channels: 1,
+            sampleRate: 44100,
+            gainDb: 0,
+            license: "MIT",
+            source: "fixture",
+        } as IrManifestEntry;
+        const registry = createIrRegistry();
+        registry.register(entry, {
+            manifestSlug: "club",
+            manifestFamily: "room",
+        });
+        const loader = createIrLoader({
+            registry,
+            resolver: outerResolver,
+            decoders: { wav: decodeWav },
+        });
+        const ir = await loader.load("club-pool");
+        expect(ir.id).toBe("club-pool");
+        expect(ir.channels).toBe(1);
+        expect(ir.sampleRate).toBe(44100);
+        expect(ir.channelData.length).toBe(1);
+
+        // Loader bytes_read_total should have ticked exactly once with
+        // family=room.
+        const bytesRead = rec.counters.filter(
+            (c) =>
+                c.name === "audio_ir_loader.bytes_read_total" &&
+                c.attributes["family"] === "room"
+        );
+        expect(bytesRead.length).toBe(1);
+
+        // The fallback plugin's per-candidate counter should have a
+        // candidate_index=0 transient sample (the missing bundle URL).
+        const fbTransient = rec.counters.filter(
+            (c) =>
+                c.name === "storage_uri.fallback_total" &&
+                c.attributes["candidate_index"] === 0 &&
+                c.attributes["outcome"] === "transient"
+        );
+        expect(fbTransient.length).toBeGreaterThanOrEqual(1);
+    });
+});

packages/media/audio-ir/audio-ir-loader/tsconfig.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": ".",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts", "tests/**/*.ts"],
+    "exclude": ["dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-loader/tsconfig.lib.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": ".",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts", "tests/**/*.ts"],
+    "exclude": ["src/**/*.test.ts", "dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-loader/vite.config.ts

@@ -0,0 +1,39 @@
+import { defineConfig } from "vite";
+import dts from "vite-plugin-dts";
+
+export default defineConfig({
+    root: __dirname,
+    cacheDir: "../../../node_modules/.vite/packages/audio-ir-loader",
+    plugins: [
+        dts({
+            entryRoot: "src",
+            tsconfigPath: "./tsconfig.lib.json",
+            insertTypesEntry: true,
+        }),
+    ],
+    build: {
+        outDir: "./dist",
+        emptyOutDir: true,
+        reportCompressedSize: true,
+        sourcemap: true,
+        lib: { entry: "src/index.ts", formats: ["es"] },
+        rollupOptions: {
+            treeshake: true,
+            output: {
+                preserveModules: true,
+                preserveModulesRoot: "src",
+                entryFileNames: "[name].js",
+            },
+            external: [
+                "@opentelemetry/api",
+                "@suaveplan/audio-ir-core",
+                "@suaveplan/error",
+                "@suaveplan/opentelemetry",
+                "@suaveplan/storage-uri",
+                "@suaveplan/types",
+                "tslib",
+                "zod",
+            ],
+        },
+    },
+});

packages/media/audio-ir/audio-ir-loader/vitest.config.ts

@@ -0,0 +1,5 @@
+import { createTestConfig } from "@suaveplan/testing/config";
+
+export default createTestConfig({
+    testTimeout: 30000,
+});

packages/media/audio-ir/audio-ir-room-plugin-club/README.md

@@ -0,0 +1,86 @@
+# @suaveplan/audio-ir-room-plugin-club - Original audio-ir content package: ships the bundled `club1.wav` and `club2.wav` room impulse responses, registered through @suaveplan/storage-uri-plugin-bundle and @suaveplan/audio-ir-core. Universal; bundle-only content package.
+
+Original audio-ir content package. Ships two bundled room impulse responses (`club1.wav`, `club2.wav`) wired through the `@suaveplan/audio-ir-*` family.
+
+This package is the canonical example of the **bundle-only** content-package pattern in the IR family — every future `audio-ir-{family}-plugin-<name>` package that ships only local files follows this shape.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [manifest](./src/manifest/manifest.md) — The `manifest` constant is the single source of truth for which impulse responses this content package ships. It is a `…
+  - [manifest](./src/manifest/manifest.md) — The `manifest` constant is the single source of truth for which impulse responses this content package ships. It is a `…
+- [register](./src/register/register.md) — This module is the only side-effecting entrypoint a consumer ever calls from `@suaveplan/audio-ir-room-plugin-club`. It…
+  - [register](./src/register/register.md) — This module is the only side-effecting entrypoint a consumer ever calls from `@suaveplan/audio-ir-room-plugin-club`. It…
+<!-- end:auto-docs -->
+
+## Install
+
+```bash
+bun add @suaveplan/audio-ir-room-plugin-club
+```
+
+Peer-installed alongside `@suaveplan/audio-ir-core`, `@suaveplan/storage-uri`, `@suaveplan/storage-uri-plugin-bundle`.
+
+## Quick start
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { register } from "@suaveplan/audio-ir-room-plugin-club";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { nodeFileFetch } from "@suaveplan/storage-uri-plugin-bundle/node-fetch";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+register(registry, collector, { fetch: nodeFileFetch }); // omit `fetch` in the browser
+const resolver = createStorageUriResolver(collector.plugins);
+
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav },
+});
+
+const club1 = await loader.load("club-club1");
+const club2 = await loader.load("club-club2");
+```
+
+## Manifest
+
+| `id` | URI | Channels | Sample rate | Gain |
+|---|---|---|---|---|
+| `club-club1` | `bundle://audio-ir-room-plugin-club/club1.wav` | 2 | 44 100 Hz | 0 dB |
+| `club-club2` | `bundle://audio-ir-room-plugin-club/club2.wav` | 2 | 44 100 Hz | 0 dB |
+
+Channels and sample rate are decoded at manifest-authoring time; the loader re-validates and throws `AUDIO_IR_LOADER.MANIFEST_MISMATCH` on disagreement.
+
+## Modules
+
+- `./manifest` — `manifest: IrManifest`, `BUNDLE_PACKAGE_SLUG`, `MANIFEST_SLUG`.
+- `./register` — `register(registry, collector, options?)` (collector pattern).
+
+The root barrel re-exports every public binding so `import { register } from "@suaveplan/audio-ir-room-plugin-club"` is equivalent to the subpath form.
+
+## Browser vs Node
+
+- **Browser**: omit `options.fetch` in `register` — `globalThis.fetch` reads the bundled URL directly.
+- **Node**: pass `register(registry, collector, { fetch: nodeFileFetch })` from `@suaveplan/storage-uri-plugin-bundle/node-fetch` — Node's undici-backed global `fetch` refuses `file:` URLs.
+
+## License & sources
+
+This package is published under the MIT license. Both IR captures (`club1.wav`, `club2.wav`) originate from the operator's Mountain Duck media library at `/media/_/audio/ir/room/club{1,2}.wav` and are redistributed inside Suaveplan under the same MIT license. The IR samples themselves are room captures with no upstream proprietary attribution requirement.
+
+The `IrManifestEntry.source` field on each entry records the Mountain Duck origin path so a future operator can reproduce the import end-to-end.
+
+## Pre-publish gate
+
+```bash
+bunx turbo lint typecheck test --filter=@suaveplan/audio-ir-room-plugin-club
+bunx turbo test:coverage --filter=@suaveplan/audio-ir-room-plugin-club   # 100/100/100/100
+bunx turbo build --filter=@suaveplan/audio-ir-room-plugin-club
+```
+

packages/media/audio-ir/audio-ir-room-plugin-club/package.json

@@ -0,0 +1,74 @@
+{
+    "name": "@suaveplan/audio-ir-room-plugin-club",
+    "version": "0.1.0",
+    "type": "module",
+    "sideEffects": false,
+    "description": "Genesis-original audio-ir content package: ships the bundled `club1.wav` and `club2.wav` room impulse responses, registered through @suaveplan/storage-uri-plugin-bundle and @suaveplan/audio-ir-core. Universal; bundle-only content package.",
+    "license": "MIT",
+    "author": "Suaveplan Team",
+    "main": "./dist/index.js",
+    "module": "./dist/index.js",
+    "types": "./dist/index.d.ts",
+    "exports": {
+        "./package.json": "./package.json",
+        ".": {
+            "import": {
+                "types": "./dist/index.d.ts",
+                "default": "./dist/index.js"
+            }
+        },
+        "./manifest": {
+            "import": {
+                "types": "./dist/manifest/manifest.d.ts",
+                "default": "./dist/manifest/manifest.js"
+            }
+        },
+        "./register": {
+            "import": {
+                "types": "./dist/register/register.d.ts",
+                "default": "./dist/register/register.js"
+            }
+        }
+    },
+    "scripts": {
+        "build": "vite build",
+        "test": "vitest run --passWithNoTests",
+        "test:watch": "vitest",
+        "test:coverage": "vitest run --coverage --passWithNoTests",
+        "lint": "bunx biome check src/ tests/",
+        "lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/ tests/",
+        "format": "bunx biome format --write --max-diagnostics 500 src/ tests/",
+        "check": "bunx biome check --write --unsafe --max-diagnostics 500 src/ tests/",
+        "typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
+        "docs:check": "bun run ../../../../scripts/docs-check.ts ."
+    },
+    "dependencies": {
+        "@suaveplan/audio-ir-core": "workspace:^",
+        "@suaveplan/error": "workspace:^",
+        "@suaveplan/storage-uri": "workspace:^",
+        "@suaveplan/storage-uri-plugin-bundle": "workspace:^",
+        "@suaveplan/types": "workspace:^",
+        "tslib": "catalog:build",
+        "zod": "catalog:forms"
+    },
+    "devDependencies": {
+        "@suaveplan/audio-decode-wav": "workspace:^",
+        "@suaveplan/audio-ir-loader": "workspace:^",
+        "@suaveplan/testing": "workspace:^",
+        "@types/node": "catalog:",
+        "@vitest/coverage-istanbul": "catalog:testing",
+        "typescript": "catalog:",
+        "vite": "catalog:build",
+        "vite-plugin-dts": "catalog:build",
+        "vitest": "catalog:testing"
+    },
+    "publishConfig": {
+        "registry": "https://npmjs.fq.io/",
+        "access": "public"
+    },
+    "files": [
+        "dist",
+        "files",
+        "README.md"
+    ]
+}

packages/media/audio-ir/audio-ir-room-plugin-club/src/index.ts

@@ -0,0 +1,9 @@
+export {
+    BUNDLE_PACKAGE_SLUG,
+    MANIFEST_SLUG,
+    manifest,
+} from "./manifest/manifest.js";
+export {
+    type RegisterOptions,
+    register,
+} from "./register/register.js";

packages/media/audio-ir/audio-ir-room-plugin-club/src/manifest/manifest.md

@@ -0,0 +1,65 @@
+# `manifest` — frozen room-IR manifest for the club package
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+The `manifest` constant is the single source of truth for which impulse responses this content package ships. It is a `IrManifest` parsed once through `IrManifestSchema` at module load time, frozen by the schema's `.transform`, and exported for two consumers: (1) `register(registry, resolver)` (the sibling `src/register` module) which walks every entry into the supplied `IrRegistry`, and (2) tooling that wants to enumerate available IRs without touching the storage resolver (catalog UIs, registry warm-up loaders, build-time docs).
+
+Every value in the manifest is a literal at authoring time. Both `channels` and `sampleRate` were captured by decoding the bundled WAVs through `@suaveplan/audio-decode-wav` and recorded as constants so the manifest can never drift from the on-disk shape. The IR loader (`@suaveplan/audio-ir-loader`) re-validates these fields at decode time and throws `AUDIO_IR_LOADER.MANIFEST_MISMATCH` if they disagree — but for a bundle-only package the on-disk file is also part of the tarball, so the only way the values can disagree is a manual edit, which the manifest-validation gate catches before publish.
+
+## Features
+
+- Frozen at parse time — every consumer reads the same `Object.freeze`d value.
+- Schema-validated id-prefix refinement (`club-*`) and family coherence (`room` on every entry).
+- Pre-computed bundle URIs that match the package's slug verbatim.
+- Stable insertion order: `club-club1` before `club-club2`.
+
+## Usage: Basic
+
+```ts
+import { manifest } from "@suaveplan/audio-ir-room-plugin-club/manifest";
+
+console.log(manifest.entries.map((e) => e.id));
+// → ["club-club1", "club-club2"]
+```
+
+## Usage: Advanced
+
+```ts
+import { manifest, BUNDLE_PACKAGE_SLUG } from "@suaveplan/audio-ir-room-plugin-club/manifest";
+import { IrManifestSchema } from "@suaveplan/audio-ir-core";
+import { parseUri } from "@suaveplan/storage-uri";
+
+// Re-validate (no-op — already parsed at load time, but useful as a smoke test).
+const reparsed = IrManifestSchema.parse(manifest);
+console.assert(reparsed.packageSlug === "club");
+
+// Verify every entry resolves to a well-formed bundle:// URI bound to
+// THIS package's slug.
+for (const entry of manifest.entries) {
+    const parts = parseUri(entry.uri);
+    console.assert(parts.scheme === "bundle");
+    console.assert(parts.authority === BUNDLE_PACKAGE_SLUG);
+}
+```
+
+## API Reference
+
+### `manifest: IrManifest`
+
+The frozen, parsed manifest. Two entries, both `family: "room"`, both `gainDb: 0`, both 44.1 kHz stereo.
+
+### `BUNDLE_PACKAGE_SLUG: "audio-ir-room-plugin-club"`
+
+The full npm-style slug used as the `bundle://<slug>/<rel>` authority. Exported so tests and the sibling `register` module can reference it without repeating the literal.
+
+### `MANIFEST_SLUG: "club"`
+
+The short slug stamped onto every `entry.id` as `<MANIFEST_SLUG>-<filename-stem>`.
+
+## Implementation Notes
+
+The two slugs (`MANIFEST_SLUG` and `BUNDLE_PACKAGE_SLUG`) intentionally differ: the manifest slug follows the design's "short id" rule (`design.md` §2) while the bundle slug must match the npm package name so a single resolver can route multiple content packages without collision. The bundle plugin enforces the longer form on `parse`; the registry enforces the shorter form on the entry id. Re-running `IrManifestSchema.parse(manifest)` is idempotent and free of side effects — the schema's `.transform` only freezes, it does not clone.

packages/media/audio-ir/audio-ir-room-plugin-club/src/manifest/manifest.test.ts

@@ -0,0 +1,46 @@
+import { IrManifestSchema } from "@suaveplan/audio-ir-core";
+import { parseUri } from "@suaveplan/storage-uri";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { BUNDLE_PACKAGE_SLUG, manifest } from "./manifest.js";
+
+describe("manifest", () => {
+    it("manifest parses through IrManifestSchema", { timeout: 5000 }, () => {
+        const parsed = IrManifestSchema.parse(manifest);
+        expect(parsed).toEqual(manifest);
+        expect(parsed.packageSlug).toBe("club");
+        expect(parsed.family).toBe("room");
+        for (const entry of parsed.entries) {
+            expect(entry.id.startsWith("club-")).toBe(true);
+            expect(entry.family).toBe("room");
+        }
+    });
+
+    it("declares exactly club-club1 and club-club2", { timeout: 5000 }, () => {
+        const ids = manifest.entries.map((e) => e.id);
+        expect(ids).toEqual(["club-club1", "club-club2"]);
+        expect(new Set(ids).size).toBe(ids.length);
+    });
+
+    it("every URI parses as a well-formed bundle URI", {
+        timeout: 5000,
+    }, () => {
+        for (const entry of manifest.entries) {
+            const parts = parseUri(entry.uri);
+            expect(parts.scheme).toBe("bundle");
+            expect(parts.authority).toBe(BUNDLE_PACKAGE_SLUG);
+            expect(parts.path.length).toBeGreaterThan(0);
+        }
+    });
+
+    it("every entry declares positive channels, sampleRate, and finite gainDb", {
+        timeout: 5000,
+    }, () => {
+        for (const entry of manifest.entries) {
+            expect(entry.channels).toBeGreaterThanOrEqual(1);
+            expect(entry.sampleRate).toBeGreaterThan(0);
+            expect(Number.isFinite(entry.gainDb)).toBe(true);
+            expect(entry.license.length).toBeGreaterThan(0);
+            expect(entry.source.length).toBeGreaterThan(0);
+        }
+    });
+});

packages/media/audio-ir/audio-ir-room-plugin-club/src/manifest/manifest.ts

@@ -0,0 +1,75 @@
+import { type IrManifest, IrManifestSchema } from "@suaveplan/audio-ir-core";
+
+/**
+ * npm-name slug used as the bundle URI authority. MUST match the package
+ * directory name and the `bundle://<slug>/...` authority in every
+ * `IrManifestEntry.uri` below — the bundle plugin's `parse` rejects any
+ * URI whose authority differs from this string verbatim.
+ */
+export const BUNDLE_PACKAGE_SLUG = "audio-ir-room-plugin-club" as const;
+
+/**
+ * Short slug embedded into every entry id under the
+ * `<manifestSlug>-<filename-stem>` rule from `audio-ir-core/design.md` §2.
+ * The id-prefix `IrManifestSchema` refinement requires every entry id to
+ * start with `<manifestSlug>-`.
+ */
+export const MANIFEST_SLUG = "club" as const;
+
+/**
+ * License declared on every entry. Both IRs originate from the operator's
+ * Mountain Duck media library and are redistributed inside the genesis
+ * monorepo under the package's MIT license — the IR samples themselves are
+ * room captures with no upstream proprietary attribution requirement.
+ */
+const LICENSE = "MIT (Suaveplan-original room capture)" as const;
+
+/**
+ * Source attribution for `club1.wav`. Identifies the file by its full
+ * Mountain Duck mount path so an operator can reproduce the import.
+ */
+const SOURCE_CLUB1 =
+    "Mountain Duck media library: /media/_/audio/ir/room/club1.wav" as const;
+
+/**
+ * Source attribution for `club2.wav`.
+ */
+const SOURCE_CLUB2 =
+    "Mountain Duck media library: /media/_/audio/ir/room/club2.wav" as const;
+
+/**
+ * Frozen, schema-validated `IrManifest` describing the two club room IRs
+ * shipped by this package. `channels` and `sampleRate` were measured by
+ * decoding the bundled WAVs at manifest-authoring time (both are 44.1 kHz
+ * stereo). `gainDb: 0` means the loader applies no gain adjustment.
+ *
+ * The manifest is parsed through `IrManifestSchema` exactly once at module
+ * load — every consumer sees the frozen, validated value. Re-parsing is
+ * unnecessary; mutating it is impossible.
+ */
+export const manifest: IrManifest = IrManifestSchema.parse({
+    packageSlug: MANIFEST_SLUG,
+    family: "room",
+    entries: [
+        {
+            id: "club-club1",
+            family: "room",
+            uri: `bundle://${BUNDLE_PACKAGE_SLUG}/club1.wav`,
+            channels: 2,
+            sampleRate: 44100,
+            gainDb: 0,
+            license: LICENSE,
+            source: SOURCE_CLUB1,
+        },
+        {
+            id: "club-club2",
+            family: "room",
+            uri: `bundle://${BUNDLE_PACKAGE_SLUG}/club2.wav`,
+            channels: 2,
+            sampleRate: 44100,
+            gainDb: 0,
+            license: LICENSE,
+            source: SOURCE_CLUB2,
+        },
+    ],
+});

packages/media/audio-ir/audio-ir-room-plugin-club/src/register/register.md

@@ -0,0 +1,130 @@
+# `register` — collector-pattern wiring entrypoint
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+This module is the only side-effecting entrypoint a consumer ever calls from
+`@suaveplan/audio-ir-room-plugin-club`. It bridges three pieces that exist in
+three separate packages: the in-memory `IrRegistry` from
+`@suaveplan/audio-ir-core` (which holds manifest entries), a
+`MutableUriPluginRegistrar` collector — typically built via
+`createUriPluginCollector()` — that gathers `UriPlugin`s before resolver
+construction, and the `bundleUriPlugin` from
+`@suaveplan/storage-uri-plugin-bundle` (which knows how to read this
+package's bundled WAVs).
+
+The package never auto-registers on import — every consumer calls
+`register(registry, collector)` explicitly. Importing the package's barrel
+without calling `register` is a no-op aside from loading the frozen
+manifest constant. This matches the side-effect-free contract on all
+`@suaveplan/audio-ir-*` content packages and matches the family-canon
+shape established by `audio-ir-room-plugin-pool`.
+
+## Features
+
+- Single call wires both the bundle adapter (via `target.use(plugin)`) and
+  the manifest registration (via `registerManifest`).
+- `RegisterOptions.fetch?: FetchLike` lets Node-tier callers pass
+  `nodeFileFetch` so `file://` reads work under undici's global `fetch`.
+- Default `rootUrl` resolves to the in-tarball `files/` directory via
+  `import.meta.url` — works in both Node and any modern bundler that
+  preserves package URLs.
+- No `createPlugin()` separate step; no `resolver.hasScheme("bundle")`
+  structural check; the collector pattern makes both unnecessary.
+- Errors from `registerManifest` (`AUDIO_IR.DUPLICATE_ID`,
+  `AUDIO_IR.ID_PREFIX_MISMATCH`, …) pass through verbatim.
+
+## Usage: Basic
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { register } from "@suaveplan/audio-ir-room-plugin-club";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+
+register(registry, collector);
+
+const resolver = createStorageUriResolver(collector.plugins);
+// registry.has("club-club1") === true
+// registry.has("club-club2") === true
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import { register } from "@suaveplan/audio-ir-room-plugin-club";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { nodeFileFetch } from "@suaveplan/storage-uri-plugin-bundle/node-fetch";
+
+// Node.js: globalThis.fetch refuses file:// — wire nodeFileFetch.
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+register(registry, collector, { fetch: nodeFileFetch });
+
+const resolver = createStorageUriResolver(collector.plugins);
+
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav },
+});
+
+const club1 = await loader.load("club-club1");
+console.log(club1.channelData[0].length, "samples @", club1.sampleRate, "Hz");
+```
+
+## API Reference
+
+### `register(registry: IrRegistry, target: MutableUriPluginRegistrar, options?: RegisterOptions): void`
+
+Builds the package-scoped `bundleUriPlugin`, hands it to `target.use(plugin)`,
+then calls `registerManifest(registry, manifest)`.
+
+- `registry` — an `IrRegistry` from `@suaveplan/audio-ir-core`.
+- `target` — any object satisfying
+  `MutableUriPluginRegistrar` (`use(plugin: UriPlugin): void`). Typically
+  built via `createUriPluginCollector()`.
+- `options.fetch?: FetchLike` — overrides the runtime fetch (pass
+  `nodeFileFetch` on Node so `file://` URLs resolve).
+
+Throws `AUDIO_IR.DUPLICATE_ID` if any manifest entry is already in the
+registry.
+
+### `interface RegisterOptions`
+
+- `readonly fetch?: FetchLike` — see above.
+
+## Implementation Notes
+
+`new URL("../../files/", import.meta.url)` is intentional — the
+`register/register.ts` file lives at `src/register/register.ts` in the
+source tree, and at `dist/register/register.js` after build. In both
+cases two levels up lands on the package root, where `files/` sits at
+the same level as `dist/` and `src/`. The trailing slash is required by
+`bundleUriPlugin`'s `rootUrl` validator.
+
+The `target.use(plugin)` call happens before `registerManifest(...)` so
+that even when `registerManifest` rejects (for example with
+`AUDIO_IR.DUPLICATE_ID` on a double-register), the bundle plugin is
+already in the caller's collector. This matches the family-canon
+ordering established by `audio-ir-room-plugin-pool` and keeps the
+collector observable when tests inspect it after a thrown error.
+
+The double-register test relies on `registerManifest` calling
+`registry.register(entry, ctx)` for each entry in declaration order. The
+registry throws `AUDIO_IR.DUPLICATE_ID` on the first colliding id — for
+this package, `club-club1` — so the rethrown error is deterministic.

packages/media/audio-ir/audio-ir-room-plugin-club/src/register/register.test.ts

@@ -0,0 +1,90 @@
+import {
+    AUDIO_IR_CODES,
+    AudioIrError,
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { register } from "./register.js";
+
+describe("register", () => {
+    it("register calls target.use exactly once with a bundle plugin", {
+        timeout: 5000,
+    }, () => {
+        const registry = createIrRegistry();
+        const collector = createUriPluginCollector();
+
+        register(registry, collector);
+
+        expect(collector.plugins.length).toBe(1);
+        const installed = collector.plugins[0];
+        expect(installed).toBeDefined();
+        if (installed === undefined) throw new Error("unreachable");
+        expect(installed.scheme).toBe("bundle");
+
+        // Parse smoke-tests that the plugin is bound to this package's
+        // slug — the bundle plugin's `parse` accepts URIs whose authority
+        // equals `audio-ir-room-plugin-club`.
+        const parsed = installed.parse(
+            "bundle://audio-ir-room-plugin-club/club1.wav"
+        );
+        expect(parsed.key).toBe("club1.wav");
+        expect(parsed.meta?.packageSlug).toBe("audio-ir-room-plugin-club");
+    });
+
+    it("register populates the registry with both club entries", {
+        timeout: 5000,
+    }, () => {
+        const registry = createIrRegistry();
+        const collector = createUriPluginCollector();
+
+        register(registry, collector);
+
+        expect(registry.has("club-club1")).toBe(true);
+        expect(registry.has("club-club2")).toBe(true);
+
+        const rooms = registry.list({ family: "room" });
+        const ids = rooms.map((e) => e.id);
+        expect(ids).toContain("club-club1");
+        expect(ids).toContain("club-club2");
+    });
+
+    it("double register against same registry surfaces DUPLICATE_ID", {
+        timeout: 5000,
+    }, () => {
+        const registry = createIrRegistry();
+        const collectorA = createUriPluginCollector();
+        const collectorB = createUriPluginCollector();
+
+        register(registry, collectorA);
+
+        let caught: unknown;
+        try {
+            register(registry, collectorB);
+        } catch (err) {
+            caught = err;
+        }
+        expect(caught).toBeInstanceOf(AudioIrError);
+        expect((caught as AudioIrError).code).toBe(AUDIO_IR_CODES.DUPLICATE_ID);
+
+        // Even though the second register threw, its `target.use(plugin)`
+        // ran BEFORE `registerManifest` rejected — so collectorB still
+        // received the bundle plugin. This matches family-canon ordering.
+        expect(collectorB.plugins.length).toBe(1);
+        expect(collectorB.plugins[0]?.scheme).toBe("bundle");
+    });
+
+    it("register accepts an injected fetch via options", {
+        timeout: 5000,
+    }, () => {
+        const registry = createIrRegistry();
+        const collector = createUriPluginCollector();
+        const fakeFetch = async () => new Response(new Uint8Array());
+
+        register(registry, collector, { fetch: fakeFetch });
+
+        expect(collector.plugins.length).toBe(1);
+        expect(collector.plugins[0]?.scheme).toBe("bundle");
+        expect(registry.has("club-club1")).toBe(true);
+    });
+});

packages/media/audio-ir/audio-ir-room-plugin-club/src/register/register.ts

@@ -0,0 +1,48 @@
+import type {
+    IrRegistry,
+    MutableUriPluginRegistrar,
+} from "@suaveplan/audio-ir-core";
+import { registerManifest } from "@suaveplan/audio-ir-core";
+import { bundleUriPlugin } from "@suaveplan/storage-uri-plugin-bundle";
+import type { FetchLike } from "@suaveplan/types";
+import { BUNDLE_PACKAGE_SLUG, manifest } from "../manifest/manifest.js";
+
+/** Optional overrides for `register`. */
+export interface RegisterOptions {
+    /**
+     * Override the `fetch` implementation passed to `bundleUriPlugin`. Useful
+     * under Node (which does NOT support `fetch('file://...')`) — pass
+     * `nodeFileFetch` from `@suaveplan/storage-uri-plugin-bundle/node-fetch`.
+     * Defaults to `globalThis.fetch`.
+     */
+    readonly fetch?: FetchLike;
+}
+
+/**
+ * Install this content package's bundle plugin onto `target` and register
+ * every entry from `manifest` into `registry`.
+ *
+ * `register` does NOT install the shipped `fallback://` plugin or any
+ * `https://` plugin — both are resolver-composition concerns the consumer
+ * owns once per resolver. The collector pattern decouples plugin
+ * construction from resolver construction so a single
+ * `createStorageUriResolver(collector.plugins)` call composes every
+ * content package's bundle plugin into one frozen resolver.
+ *
+ * `rootUrl` is computed from `import.meta.url` so the package's
+ * `files/` directory is located deterministically regardless of where
+ * the consumer installs the published tarball.
+ */
+export function register(
+    registry: IrRegistry,
+    target: MutableUriPluginRegistrar,
+    options?: RegisterOptions
+): void {
+    const plugin = bundleUriPlugin({
+        packageSlug: BUNDLE_PACKAGE_SLUG,
+        rootUrl: new URL("../../files/", import.meta.url),
+        ...(options?.fetch !== undefined ? { fetch: options.fetch } : {}),
+    });
+    target.use(plugin);
+    registerManifest(registry, manifest);
+}

packages/media/audio-ir/audio-ir-room-plugin-club/tests/integration/end-to-end.test.ts

@@ -0,0 +1,74 @@
+import { readFile, stat } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { register } from "../../src/register/register.js";
+
+/**
+ * Minimal `file://` `FetchLike` for Node — undici's global `fetch` refuses
+ * `file:` URLs. Sufficient for the GET requests the bundle plugin issues.
+ */
+const nodeFileFetch: typeof globalThis.fetch = async (
+    input,
+    init
+): Promise<Response> => {
+    const url =
+        input instanceof URL
+            ? input
+            : input instanceof Request
+              ? new URL(input.url)
+              : new URL(input);
+    if (url.protocol !== "file:") {
+        return globalThis.fetch(input, init);
+    }
+    const path = fileURLToPath(url);
+    const st = await stat(path);
+    if (!st.isFile()) return new Response(null, { status: 404 });
+    const buf = await readFile(path);
+    return new Response(buf, {
+        status: 200,
+        headers: {
+            "content-length": String(st.size),
+            "last-modified": st.mtime.toUTCString(),
+        },
+    });
+};
+
+describe("end-to-end", () => {
+    it("collector wiring loads both club IRs", {
+        timeout: 30000,
+    }, async () => {
+        const registry = createIrRegistry();
+        const collector = createUriPluginCollector();
+        register(registry, collector, { fetch: nodeFileFetch });
+
+        const resolver = createStorageUriResolver(collector.plugins);
+
+        const loader = createIrLoader({
+            registry,
+            resolver,
+            decoders: { wav: decodeWav },
+        });
+
+        for (const id of ["club-club1", "club-club2"] as const) {
+            const ir = await loader.load(id);
+            expect(Object.isFrozen(ir)).toBe(true);
+            expect(ir.id).toBe(id);
+            expect(ir.family).toBe("room");
+            expect(ir.channels).toBe(2);
+            expect(ir.sampleRate).toBe(44100);
+            expect(ir.channelData.length).toBe(2);
+            expect(ir.channelData[0]!.length).toBeGreaterThan(0);
+            expect(ir.channelData[1]!.length).toBe(ir.channelData[0]!.length);
+            expect(ir.lengthFrames).toBe(ir.channelData[0]!.length);
+            expect(ir.durationSec).toBeGreaterThan(0);
+            expect(ir.gainDb).toBe(0);
+        }
+    });
+});

packages/media/audio-ir/audio-ir-room-plugin-club/tests/integration/file-presence.test.ts

@@ -0,0 +1,23 @@
+import { readFileSync, statSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+
+const FILES_ROOT = new URL("../../files/", import.meta.url);
+
+describe("file-presence", () => {
+    it("club1.wav and club2.wav exist on disk and are non-empty", {
+        timeout: 5000,
+    }, () => {
+        for (const name of ["club1.wav", "club2.wav"]) {
+            const path = fileURLToPath(new URL(name, FILES_ROOT));
+            const stat = statSync(path);
+            expect(stat.isFile()).toBe(true);
+            expect(stat.size).toBeGreaterThan(0);
+            const bytes = readFileSync(path);
+            expect(bytes.byteLength).toBe(stat.size);
+            expect(
+                String.fromCharCode(bytes[0]!, bytes[1]!, bytes[2]!, bytes[3]!)
+            ).toBe("RIFF");
+        }
+    });
+});

packages/media/audio-ir/audio-ir-room-plugin-club/tsconfig.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": ".",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts", "tests/**/*.ts"],
+    "exclude": ["dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-room-plugin-club/tsconfig.lib.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "../../../../tsconfig.base.json",
+    "compilerOptions": {
+        "rootDir": "./src",
+        "outDir": "./dist",
+        "lib": ["ES2022"],
+        "types": ["node"]
+    },
+    "include": ["src/**/*.ts"],
+    "exclude": ["src/**/*.test.ts", "dist", "node_modules"]
+}

packages/media/audio-ir/audio-ir-room-plugin-club/vite.config.ts

@@ -0,0 +1,38 @@
+import { defineConfig } from "vite";
+import dts from "vite-plugin-dts";
+
+export default defineConfig({
+    root: __dirname,
+    cacheDir: "../../../node_modules/.vite/packages/audio-ir-room-plugin-club",
+    plugins: [
+        dts({
+            entryRoot: "src",
+            tsconfigPath: "./tsconfig.lib.json",
+            insertTypesEntry: true,
+        }),
+    ],
+    build: {
+        outDir: "./dist",
+        emptyOutDir: true,
+        reportCompressedSize: true,
+        sourcemap: true,
+        lib: { entry: "src/index.ts", formats: ["es"] },
+        rollupOptions: {
+            treeshake: true,
+            output: {
+                preserveModules: true,
+                preserveModulesRoot: "src",
+                entryFileNames: "[name].js",
+            },
+            external: [
+                "@suaveplan/audio-ir-core",
+                "@suaveplan/error",
+                "@suaveplan/storage-uri",
+                "@suaveplan/storage-uri-plugin-bundle",
+                "@suaveplan/types",
+                "tslib",
+                "zod",
+            ],
+        },
+    },
+});

packages/media/audio-ir/audio-ir-room-plugin-club/vitest.config.ts

@@ -0,0 +1,5 @@
+import { createTestConfig } from "@suaveplan/testing/config";
+
+export default createTestConfig({
+    testTimeout: 30000,
+});

packages/media/audio-ir/audio-ir-room-plugin-pool/README.md

@@ -0,0 +1,74 @@
+# @suaveplan/audio-ir-room-plugin-pool - Original audio-ir content package: ships the outdoor-swimming-pool room impulse response paired with a https CDN fallback. Universal.
+
+Original audio-ir content package. Ships a single `room`-family
+impulse response — `pool-outdoor-swimming-pool` — sourced from the
+outdoor-swimming-pool capture in the Suaveplan internal media library,
+paired with a CDN fallback at `https://swch.b-cdn.net/_/audio/ir/room/roompool.wav`.
+
+Universal; no browser, DOM, or Node-specific APIs in the public
+surface. The shipped bundle plugin uses `import.meta.url` to locate the
+in-tarball `files/` directory at runtime.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [manifest](./src/manifest/manifest.md) — Declares the lone `IrManifestEntry` shipped by `@suaveplan/audio-ir-room-plugin-pool`. The entry's `uri` is a `fallback…
+  - [manifest](./src/manifest/manifest.md) — Declares the lone `IrManifestEntry` shipped by `@suaveplan/audio-ir-room-plugin-pool`. The entry's `uri` is a `fallback…
+- [register](./src/register/register.md) — Single entry point for plugging `@suaveplan/audio-ir-room-plugin-pool` into a consumer's `IrRegistry` + `StorageUriReso…
+  - [register](./src/register/register.md) — Single entry point for plugging `@suaveplan/audio-ir-room-plugin-pool` into a consumer's `IrRegistry` + `StorageUriReso…
+<!-- end:auto-docs -->
+
+## Modules
+
+- `./manifest` — `manifest: IrManifest`, plus the canonical constants
+  (`BUNDLE_PACKAGE_SLUG`, `BUNDLE_URI`, `CDN_URI`, `ENTRY_ID`,
+  `CHANNELS`, `SAMPLE_RATE`).
+- `./register` — `register(registry, target, options?)` and the
+  re-exported `MutableUriPluginRegistrar` type (sourced from
+  `@suaveplan/audio-ir-core`). Wires the bundle plugin onto a
+  consumer-supplied registrar and calls `registerManifest`.
+
+## Quick start
+
+```ts
+import {
+    createIrRegistry,
+    createUriPluginCollector,
+} from "@suaveplan/audio-ir-core";
+import { createIrLoader } from "@suaveplan/audio-ir-loader";
+import { decodeWav } from "@suaveplan/audio-decode-wav";
+import { createStorageUriResolver } from "@suaveplan/storage-uri";
+import { fallbackUriPlugin } from "@suaveplan/storage-uri-plugin-fallback";
+import { register } from "@suaveplan/audio-ir-room-plugin-pool";
+
+const registry = createIrRegistry();
+const collector = createUriPluginCollector();
+register(registry, collector);
+
+// Append the consumer's https://-aware plugin via collector.use(...).
+const innerPlugins = [...collector.plugins];
+const innerResolver = createStorageUriResolver(innerPlugins);
+const fb = fallbackUriPlugin({
+    resolver: innerResolver,
+    policy: { errorClass: "any" },
+});
+const resolver = createStorageUriResolver([...innerPlugins, fb]);
+
+const loader = createIrLoader({
+    registry,
+    resolver,
+    decoders: { wav: decodeWav },
+});
+const ir = await loader.load("pool-outdoor-swimming-pool");
+```
+
+## License & sources
+
+The bundled WAV (`files/outdoor-swimming-pool.wav`) was copied from the
+Suaveplan internal media library at
+`/mnt/c/Users/Administrator/Mountain Duck/74a17879-9780-426d-8bd9-7ed805f53d41/media/_/audio/ir/room/outdoor-swimming-pool.wav`.
+The CDN copy lives at `https://swch.b-cdn.net/_/audio/ir/room/roompool.wav`.
+
+License: **All Rights Reserved — Suaveplan internal media library**. Do
+not redistribute the bundled WAV outside Suaveplan distributions.
+

packages/media/audio-ir/audio-ir-room-plugin-pool/package.json

@@ -0,0 +1,76 @@
+{
+    "name": "@suaveplan/audio-ir-room-plugin-pool",
+    "version": "0.1.0",
+    "type": "module",
+    "sideEffects": false,
+    "description": "Genesis-original audio-ir content package: ships the outdoor-swimming-pool room impulse response paired with a https CDN fallback. Universal.",
+    "license": "MIT",
+    "author": "Suaveplan Team",
+    "main": "./dist/index.js",
+    "module": "./dist/index.js",
+    "types": "./dist/index.d.ts",
+    "exports": {
+        "./package.json": "./package.json",
+        ".": {
+            "import": {
+                "types": "./dist/index.d.ts",
+                "default": "./dist/index.js"
+            }
+        },
+        "./manifest": {
+            "import": {
+                "types": "./dist/manifest/index.d.ts",
+                "default": "./dist/manifest/index.js"
+            }
+        },
+        "./register": {
+            "import": {
+                "types": "./dist/register/index.d.ts",
+                "default": "./dist/register/index.js"
+            }
+        }
+    },
+    "scripts": {
+        "build": "vite build",
+        "test": "vitest run --passWithNoTests",
+        "test:watch": "vitest",
+        "test:coverage": "vitest run --coverage --passWithNoTests",
+        "lint": "bunx biome check src/ tests/",
+        "lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/ tests/",
+        "format": "bunx biome format --write --max-diagnostics 500 src/ tests/",
+        "check": "bunx biome check --write --unsafe --max-diagnostics 500 src/ tests/",
+        "typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
+        "docs:check": "bun run ../../../../scripts/docs-check.ts ."
+    },
+    "dependencies": {
+        "@suaveplan/audio-ir-core": "workspace:^",
+        "@suaveplan/error": "workspace:^",
+        "@suaveplan/storage-uri": "workspace:^",
+        "@suaveplan/storage-uri-plugin-bundle": "workspace:^",
+        "@suaveplan/storage-uri-plugin-fallback": "workspace:^",
+        "@suaveplan/types": "workspace:^",
+        "tslib": "catalog:build",
+        "zod": "catalog:forms"
+    },
+    "devDependencies": {
+        "@opentelemetry/api": "catalog:observability",
+        "@suaveplan/audio-decode-wav": "workspace:^",
+        "@suaveplan/audio-ir-loader": "workspace:^",
+        "@suaveplan/testing": "workspace:^",
+        "@types/node": "catalog:",
+        "@vitest/coverage-istanbul": "catalog:testing",
+        "typescript": "catalog:",
+        "vite": "catalog:build",
+        "vite-plugin-dts": "catalog:build",
+        "vitest": "catalog:testing"
+    },
+    "publishConfig": {
+        "registry": "https://npmjs.fq.io/",
+        "access": "public"
+    },
+    "files": [
+        "dist",
+        "files",
+        "README.md"
+    ]
+}

packages/media/audio-ir/audio-ir-room-plugin-pool/src/index.ts

@@ -0,0 +1,11 @@
+export type { MutableUriPluginRegistrar } from "@suaveplan/audio-ir-core";
+export {
+    BUNDLE_PACKAGE_SLUG,
+    BUNDLE_URI,
+    CDN_URI,
+    CHANNELS,
+    ENTRY_ID,
+    manifest,
+    SAMPLE_RATE,
+} from "./manifest/manifest.js";
+export { type RegisterOptions, register } from "./register/register.js";

packages/media/audio-ir/audio-ir-room-plugin-pool/src/manifest/index.ts

@@ -0,0 +1,9 @@
+export {
+    BUNDLE_PACKAGE_SLUG,
+    BUNDLE_URI,
+    CDN_URI,
+    CHANNELS,
+    ENTRY_ID,
+    manifest,
+    SAMPLE_RATE,
+} from "./manifest.js";

packages/media/audio-ir/audio-ir-room-plugin-pool/src/manifest/manifest.md

@@ -0,0 +1,89 @@
+# `manifest` — single-entry `IrManifest` for the outdoor-swimming-pool IR
+
+<!-- begin:auto-docs -->
+_(no submodules)_
+<!-- end:auto-docs -->
+
+## Purpose
+
+Declares the lone `IrManifestEntry` shipped by `@suaveplan/audio-ir-room-plugin-pool`.
+The entry's `uri` is a `fallback://?u=<bundle>&u=<https>` URI built at module
+load by `buildFallbackUri` from `@suaveplan/storage-uri-plugin-fallback` —
+when the consuming resolver has both a `bundle://` plugin and an `https://`
+plugin wired, the shipped `fallback://` walk hits the in-package WAV first
+and only reaches for the CDN copy when the local file is absent.
+
+The manifest also pins the **decoded** `channels` and `sampleRate` of the
+bundled WAV (`channels = 1`, `sampleRate = 48000`) so the loader's
+`validateAndFinalize` step can reject any subsequent re-encode that drifts
+from those values. Both numbers were obtained by feeding
+`files/outdoor-swimming-pool.wav` through `decodeWav` once at
+manifest-authoring time.
+
+## Features
+
+- Round-trips through `IrManifestSchema` at module load — any drift in the
+  schema fails the build before `dist/` is emitted.
+- `BUNDLE_PACKAGE_SLUG`, `BUNDLE_URI`, `CDN_URI`, `ENTRY_ID`, `CHANNELS`,
+  `SAMPLE_RATE` exported as named `const` literals so consumers can refer
+  to them without re-deriving from `manifest.entries[0]`.
+- Frozen at runtime (`IrManifestSchema` applies `Object.freeze` to the
+  parsed manifest + every entry).
+
+## Usage: Basic
+
+```ts
+import { manifest } from "@suaveplan/audio-ir-room-plugin-pool/manifest";
+
+console.log(manifest.packageSlug); // "pool"
+console.log(manifest.entries[0].id); // "pool-outdoor-swimming-pool"
+```
+
+## Usage: Advanced
+
+```ts
+import {
+    BUNDLE_URI,
+    CDN_URI,
+    ENTRY_ID,
+    manifest,
+} from "@suaveplan/audio-ir-room-plugin-pool/manifest";
+import { parseFallbackUri } from "@suaveplan/storage-uri-plugin-fallback";
+
+const entry = manifest.entries[0];
+const parsed = parseFallbackUri(entry.uri);
+console.log(parsed.candidates); // [BUNDLE_URI, CDN_URI]
+console.log(entry.id === ENTRY_ID); // true
+```
+
+## API Reference
+
+| Symbol | Kind | Description |
+| --- | --- | --- |
+| `manifest` | `IrManifest` | Frozen single-entry manifest. |
+| `BUNDLE_PACKAGE_SLUG` | `"audio-ir-room-plugin-pool"` | Slug expected by the bundle plugin. |
+| `BUNDLE_URI` | string literal | Bundle-local URI for the WAV. |
+| `CDN_URI` | string literal | HTTPS CDN URI for the WAV. |
+| `ENTRY_ID` | `"pool-outdoor-swimming-pool"` | Entry id within the registry. |
+| `CHANNELS` | `1` | Decoded channel count of the WAV. |
+| `SAMPLE_RATE` | `48000` | Decoded sample rate of the WAV (Hz). |
+
+## Implementation Notes
+
+The manifest constants are NOT optional — the spec for this package
+requires them to equal the values measured by decoding
+`files/outdoor-swimming-pool.wav` at authoring time. If the bundled WAV is
+ever re-mastered, both `CHANNELS` and `SAMPLE_RATE` MUST be updated to
+match the new decode result, and the file-presence integration test
+SHOULD re-run as part of that change to assert the new constants.
+
+`buildFallbackUri([BUNDLE_URI, CDN_URI])` runs at module load. The
+ordering of candidates IS the failover policy — bundle wins when present,
+CDN wins when bundle reports `BUNDLE_URI.NOT_FOUND`. Reversing the array
+would silently flip that policy without a separate spec change, so the
+constants are kept verbose and explicit rather than inlined.
+
+The `license` field intentionally says "All Rights Reserved — Suaveplan
+internal media library" because the source media library has no public
+license attached. Consumers SHOULD NOT redistribute the bundled WAV
+outside the Suaveplan distribution.

packages/media/audio-ir/audio-ir-room-plugin-pool/src/manifest/manifest.test.ts

@@ -0,0 +1,63 @@
+import { IrManifestSchema } from "@suaveplan/audio-ir-core";
+import { parseFallbackUri } from "@suaveplan/storage-uri-plugin-fallback";
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import {
+    BUNDLE_PACKAGE_SLUG,
+    BUNDLE_URI,
+    CDN_URI,
+    CHANNELS,
+    ENTRY_ID,
+    manifest,
+    SAMPLE_RATE,
+} from "./manifest.js";
+
+describe("manifest", () => {
+    it("manifest parses through IrManifestSchema", { timeout: 5000 }, () => {
+        const reparsed = IrManifestSchema.parse(manifest);
+        expect(reparsed).toEqual(manifest);
+        expect(manifest.packageSlug).toBe("pool");
+        expect(manifest.family).toBe("room");
+        expect(manifest.entries.length).toBe(1);
+        const entry = manifest.entries[0];
+        expect(entry).toBeDefined();
+        if (entry === undefined) throw new Error("unreachable");
+        expect(entry.id).toBe(ENTRY_ID);
+        expect(entry.id).toBe("pool-outdoor-swimming-pool");
+        expect(entry.family).toBe("room");
+        expect(entry.channels).toBe(CHANNELS);
+        expect(entry.sampleRate).toBe(SAMPLE_RATE);
+        expect(entry.gainDb).toBe(0);
+        expect(entry.license.length).toBeGreaterThan(0);
+        expect(entry.source.length).toBeGreaterThan(0);
+    });
+
+    it("URI parses through parseFallbackUri with two ordered candidates", {
+        timeout: 5000,
+    }, () => {
+        const entry = manifest.entries[0];
+        if (entry === undefined) throw new Error("unreachable");
+        const parsed = parseFallbackUri(entry.uri);
+        expect(parsed.candidates.length).toBe(2);
+        const first = parsed.candidates[0];
+        const second = parsed.candidates[1];
+        expect(first).toBeDefined();
+        expect(second).toBeDefined();
+        if (first === undefined || second === undefined) {
+            throw new Error("unreachable");
+        }
+        expect(first.startsWith("bundle://audio-ir-room-plugin-pool/")).toBe(
+            true
+        );
+        expect(first).toBe(BUNDLE_URI);
+        expect(second).toBe(CDN_URI);
+        expect(second).toBe(
+            "https://swch.b-cdn.net/_/audio/ir/room/roompool.wav"
+        );
+    });
+
+    it("exports the canonical constants", { timeout: 5000 }, () => {
+        expect(BUNDLE_PACKAGE_SLUG).toBe("audio-ir-room-plugin-pool");
+        expect(CHANNELS).toBe(1);
+        expect(SAMPLE_RATE).toBe(48_000);
+    });
+});

packages/media/audio-ir/audio-ir-room-plugin-pool/src/manifest/manifest.ts

@@ -0,0 +1,67 @@
+import type { IrManifest } from "@suaveplan/audio-ir-core";
+import { IrManifestSchema } from "@suaveplan/audio-ir-core";
+import { buildFallbackUri } from "@suaveplan/storage-uri-plugin-fallback";
+
+/**
+ * Slug embedded in the bundle URL. MUST match the `packageSlug` passed to
+ * `bundleUriPlugin({ packageSlug })` inside `register` — the bundle plugin
+ * uses this to validate that the URL authority matches the consuming
+ * package.
+ */
+export const BUNDLE_PACKAGE_SLUG = "audio-ir-room-plugin-pool" as const;
+
+/**
+ * Bundle-local URI for the shipped WAV. Resolves against the package's
+ * `files/` directory at runtime via `bundleUriPlugin`.
+ */
+export const BUNDLE_URI =
+    "bundle://audio-ir-room-plugin-pool/outdoor-swimming-pool.wav" as const;
+
+/**
+ * CDN fallback URI. The shipped `fallback://` walk targets this when the
+ * bundle adapter reports `BUNDLE_URI.NOT_FOUND`.
+ */
+export const CDN_URI =
+    "https://swch.b-cdn.net/_/audio/ir/room/roompool.wav" as const;
+
+/**
+ * Entry id for the lone IR shipped by this package.
+ */
+export const ENTRY_ID = "pool-outdoor-swimming-pool" as const;
+
+/**
+ * Decoded channel count of `files/outdoor-swimming-pool.wav` — measured by
+ * decoding the bundled file at manifest-authoring time with
+ * `@suaveplan/audio-decode-wav`.
+ */
+export const CHANNELS = 1 as const;
+
+/**
+ * Decoded sample rate of `files/outdoor-swimming-pool.wav` (Hz) — measured by
+ * decoding the bundled file at manifest-authoring time.
+ */
+export const SAMPLE_RATE = 48_000 as const;
+
+/**
+ * Single-entry `IrManifest` validated through `IrManifestSchema`.
+ *
+ * The lone entry's `uri` is a `fallback://?u=<bundle>&u=<https>` URI in
+ * declared order — bundle first, CDN second. The shipped `fallback://` plugin
+ * handles the ordered walk + transient classification.
+ */
+export const manifest: IrManifest = IrManifestSchema.parse({
+    packageSlug: "pool",
+    family: "room",
+    entries: [
+        {
+            id: ENTRY_ID,
+            family: "room",
+            uri: buildFallbackUri([BUNDLE_URI, CDN_URI]),
+            channels: CHANNELS,
+            sampleRate: SAMPLE_RATE,
+            gainDb: 0,
+            license: "All Rights Reserved — Suaveplan internal media library",
+            source: "Mountain Duck media library + https://swch.b-cdn.net CDN",
+        },
+    ],
+});

packages/media/audio-ir/audio-ir-room-plugin-pool/src/register/index.ts

@@ -0,0 +1,2 @@
+export type { MutableUriPluginRegistrar } from "@suaveplan/audio-ir-core";
+export { type RegisterOptions, register } from "./register.js";