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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.
+