objectstack-ai
diff --git a/‎.changeset/20408-dispatcher-meta-item-parity.md‎
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diff --git a/‎packages/rest/src/index.ts‎
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@@ -0,0 +1,55 @@
+---
+'@objectstack/rest': minor
+'@objectstack/runtime': patch
+---
+
+fix(rest, runtime): the runtime dispatcher's `/meta` doors scope a caller to the organization `RestServer` scopes them to, and its item read, book tree and list answer what `RestServer`'s answer (#20408)
+
+Clause-②: yes (widening) — `@objectstack/rest`'s root entry gains seven value exports (`createMetaItemAnswer`, `createMetaBookTreeAnswer`, `metaCallerOrganizationId`, `metaReadOrganizationId`, `projectMetaObjectSchema`, `refuseUnknownMetaListType`, `translateMetaEnvelope`) and five type exports (`MetaItemAnswer`, `MetaItemAnswerSources`, `MetaItemRequest`, `MetaBookTreeAnswer`, `MetaBookTreeSources`), and `MetaListAnswer` gains an optional `cacheControl`. `MetaListAnswerSources`, new in this same release with `createMetaListAnswer`, takes the transport's object-schema masker (`resolveObjectMasker`) instead of a whole-mask port, so the chain decides the cache posture for both transports. Nothing any published version exported is removed, renamed or narrowed. `@objectstack/runtime` publishes no new surface and stays a `patch`.
+
+A host that mounts only the `${prefix}/*` catch-all (`createHonoApp`, and any
+adapter written on the public `HttpDispatcher` API) serves `/meta` through the
+runtime dispatcher. Until now, on such a host:
+
+- **A member removed from an organization kept its metadata partition.** The
+  dispatcher's `/meta` doors took the organization from the session's
+  `activeOrganizationId` as stored. Under a wall-enforcing tenancy posture the
+  identity resolver DROPS a claim naming an organization the caller no longer
+  belongs to, and `RestServer` reads that vetted value. The dispatcher did not,
+  so for the rest of the session the removed member was served that
+  organization's org-scoped overlays (`view`, `dashboard`, `report`,
+  `translation`, `email_template`) by the item read, the list, `/published` and
+  `?state=draft`, listed its pending drafts on `GET /meta/_drafts`, and had a
+  `PUT /meta/:type/:name` land in its partition. Every `/meta` door here now reads
+  the vetted organization on the execution context, the value `RestServer` reads.
+- **`GET /meta/:type/:name` answered a different body.** Nothing was translated
+  whatever `Accept-Language` or `?locale=` asked for. A doc kept its whole
+  `translations` map, in no locale. An object schema came with no
+  `sortability`. The answer had no `Vary: Accept-Language`.
+- **`?preview=DRAFT`** (any casing but lower) from a builder read the published
+  world on the item read and the list. `RestServer` compares it
+  case-insensitively.
+- **`GET /meta/object/:name?preview=draft`** from a builder answered the ACTIVE
+  schema, never the pending draft.
+- **`GET /meta/totally_invented_type`** answered `200 {"items": []}`. `RestServer`
+  refuses a segment that names no metadata type with `400 INVALID_REQUEST`.
+- **`GET /meta/book/:name/tree`** was no route: `404 ROUTE_NOT_FOUND` to a signed-in
+  reader and `401` to an anonymous reader of a `public` book (ADR-0046 §6.7).
+- **An object schema served under an undetermined field visibility** (ADR-0106
+  D6 tier 2: served unmasked) carried no `Cache-Control`. `RestServer` answers
+  `private, no-store`. This was true of the list, the item read, `/published` and
+  the legacy one-segment object read.
+
+**What changed.** Everything `RestServer`'s `GET /meta/:type/:name` does after
+the store read moved, unchanged, into `createMetaItemAnswer`: absence, the item
+gate, the doc locale collapse, the object mask and its cache posture, and the
+body (the translation and `sortability`, `translateMetaEnvelope`). The book-tree
+route's whole answer moved into `createMetaBookTreeAnswer`, and the list's
+unknown-type refusal into `refuseUnknownMetaListType`. The list chain now
+applies the object mask itself (`projectMetaObjectSchema`) and reports the cache
+posture. The dispatcher's `/meta` domain calls each of these, and takes its
+organization from `metaCallerOrganizationId` / `metaReadOrganizationId`, which
+`RestServer`'s list and item reads ask too.
+
+`RestServer`'s own answers are unchanged: the move is a refactor on that side,
+and every existing REST test passes unedited.
@@ -90,24 +90,47 @@ export { refuseRepeatedQueryParams, repeatedQueryParamMessage } from './query-mu
 // [#20320] …and everything else the two transports' `/meta` reads must answer
 // alike: the list route's whole post-read chain (`createMetaListAnswer` — the
 // `api` served-set face, the list gate, `?id=`, `?object=`, the doc locale
-// collapse and slim, the transport's object mask, the translation
+// collapse and slim, the object mask over the transport's masker, the translation
 // `translateMetaList`), the one locale parse it reads (`metaRequestLocale`),
 // the anonymous gates'
 // `public`-audience predicate (`isPublicAudienceRead`) and the stored-version
 // doors' policy (`STORED_VERSION_DOOR_POLICY`, which `?state=draft` runs).
+//
+// [#20408] …and the item read's and the book tree's: the item route's whole
+// post-read chain (`createMetaItemAnswer` — absence, the item gate, the doc
+// locale collapse, the object mask and its `private, no-store`, and the body
+// `translateMetaEnvelope` builds: the translation and `sortability`), the one
+// projection every object-schema exit applies (`projectMetaObjectSchema`), the
+// `GET /meta/book/:name/tree` answer (`createMetaBookTreeAnswer`), the list's
+// unknown-type refusal (`refuseUnknownMetaListType`) and the organization a
+// caller's `/meta` request is scoped to — the VETTED one on its execution
+// context (`metaCallerOrganizationId`, and `metaReadOrganizationId` for a read
+// of one type).
 export {
+    createMetaBookTreeAnswer,
+    createMetaItemAnswer,
     createMetaItemReadGate,
     createMetaListReadGate,
     createMetaListAnswer,
     isPublicAudienceRead,
+    metaCallerOrganizationId,
+    metaReadOrganizationId,
     metaRequestLocale,
+    projectMetaObjectSchema,
+    refuseUnknownMetaListType,
     STORED_VERSION_DOOR_POLICY,
+    translateMetaEnvelope,
     translateMetaList,
 } from './meta-item-read-gate.js';
 export type {
+    MetaBookTreeAnswer,
+    MetaBookTreeSources,
+    MetaItemAnswer,
+    MetaItemAnswerSources,
     MetaItemReadGateSources,
     MetaItemReadRefusal,
     MetaItemReadVerdict,
+    MetaItemRequest,
     MetaListAnswer,
     MetaListAnswerSources,
     MetaListRequest,