`@objectstack/rest` overwrites discovery `version` with `config.api.version` (`'v1'`) — the URL path segment served in the schema's "System Identity" field, masking the producer entirely

[os-zhuang]

Found while implementing #11235 (deriving getDiscovery()'s version instead of the '1.0' literal). Filed rather than fixed: #11235's dispatch bounded that card to the producer, and this is a different package with a real design question attached, so it is not a mechanical in-place fix.

What was measured

packages/rest/src/rest-server.ts calls the producer and then unconditionally replaces the field one line later:

const discovery = await protocol.getDiscovery();

// Override discovery information with actual server configuration
discovery.version = this.config.api.version;

config.api.version is the API version identifier, not an artifact identity:

• normalizeConfig() in the same file defaults it to 'v1' (api.version ?? 'v1').
• The same value builds the mounted URL: api.apiPath ?? \${api.basePath}/${api.version}`→/api/v1`.
• packages/spec/src/api/plugin-rest-api.zod.ts declares it version: z.string().default('v1').describe('API version identifier').

But DiscoverySchema (packages/spec/src/api/discovery.zod.ts) declares that field under /** System Identity */, grouped with name and environment — the "what server is this" question. #10993's ruling and its evidence (the SDK's connect() logging data.version next to apiName and services under "Connected to ObjectStack server") settled that reading.

So on any REST-served host, GET /api/v1/discovery answers version: "v1" — the path segment the caller already typed into the URL to get there.

Two consequences worth separating

1. The field carries no identity information on the REST surface. /health and the runtime dispatcher's /discovery both report a real derived artifact version after [finding] /api/v1/health reports a hardcoded version: '1.0.0' — a field that exists and lies, so no consumer can use it for artifact identity #10993; the REST /discovery reports "v1" on every build of every release forever. A consumer reading one document cannot tell which producer answered, and gets a useless answer from the one that most clients hit.
2. It masks the producer. [finding] a THIRD hardcoded discovery version literal — getDiscovery() in packages/metadata-protocol/src/protocol.ts, identical defect to #10993, different producer/package #11235 fixed getDiscovery()'s hardcoded '1.0', but that value is overwritten before it reaches the wire — the producer fix is correct and pins the class at the producer level, and is observable to embedders calling ObjectStackProtocol.getDiscovery() directly, but it changes nothing on the REST endpoint while this line stands. The two fixes are independent and this one is where the wire-visible behaviour lives.

Why this is a decision, not a codemod

Deleting the line is not obviously right on its own. api.version is real information a client may want (which mounted API version answered), and the schema has no field for it — DiscoverySchema declares name / version / environment / routes / locale / services / capabilities / schemaDiscovery / scoping and nothing that means "API version". Options, roughly:

• A. Drop the override, let the producer's derived value through. Simplest; loses the API-version fact (which is already recoverable from routes.*, all of which are prefixed with the mounted base path).
• B. Drop the override and declare a separate field for the API version. Correct-looking, but a schema change — packages/spec, domain:spec seat, and a new field on a machine-readable surface needs its own justification under startup scope discipline.
• C. Keep it. Requires arguing that "System Identity" version means the API version on the REST producer and the artifact version on the dispatcher producer — i.e. accepting exactly the two-dialects-of-one-field situation 两个 discovery 生产者都在线上返回 schema 未声明的顶层字段(scoping / features / endpoints),且 REST 形状永远无法通过 DiscoverySchema #4828 / SDK 的 client.capabilities 声明为 WellKnownCapabilities,但两个 discovery 生产者填的是互不相交的键集 #5672 / [finding] /api/v1/health reports a hardcoded version: '1.0.0' — a field that exists and lies, so no consumer can use it for artifact identity #10993 / [finding] a THIRD hardcoded discovery version literal — getDiscovery() in packages/metadata-protocol/src/protocol.ts, identical defect to #10993, different producer/package #11235 have been closing.

Recommend A unless someone can name a consumer of the API-version fact that routes does not already serve; B only if such a consumer exists. Either way it is a triage call, not a dev call.

Consumer survey (same one run for #11235)

No consumer reads discovery version by value — no version comparison, feature gate, or cache key — in objectstack, objectui or cloud. Controls: an org-wide code search for a known-present string (x-objectstack-build-sha) returned 10 hits across objectstack and cloud, so the queries were live in both repos. The only by-value assertions found are packages/adapters/hono/src/hono.test.ts (pinning its own mock of the dispatcher producer), packages/client/tests/integration/01-discovery.test.ts (toMatch(/^v?\d+/) — which passes on 'v1' today and would also pass on a semver), and packages/spec/src/api/discovery.test.ts (a schema-parse fixture). "I found no consumer" is not "there is no consumer": embedder code outside these three repos is not visible from here.

Not in scope of this card

Neither producer is at fault here — packages/runtime/src/http-dispatcher.ts (#10993) and packages/metadata-protocol/src/protocol.ts (#11235) both derive the value correctly. This is the serving seam in @objectstack/rest only.

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[os-zhuang]

domain:engine 席的注记 —— ⛔ 只附证据，不定级、不改标、不选方向。 本卡落点是 packages/rest，归 domain:cli 车道，不是本席的。发现它的 dev 是本席在 #11235 上派的，所以把本席这边掌握的、会改变本卡代价结构的事实留在这里。

⚠️ 三个选项里有两个不在任何执行席的代裁范围内

• 选项 B（去掉覆盖 且 在 DiscoverySchema 新增一个 API-version 字段）触 packages/spec ⇒ spec 席唯一所有，且「在机器可读的公开面上新增字段」是协议/公开契约变化 ⇒ 人工地板，需维护者裁。
• 选项 C（保留覆盖）要论证「System Identity 的 version 在 REST producer 上指 API 版本、在 dispatcher producer 上指制品版本」—— 那是接受一个字段两种方言的契约决定，同样是人工地板，不是「代码整理/bug 修复」。
• 只有 选项 A（去掉覆盖、放 producer 的派生值过去）落在 bug 修复形状里。

⇒ 提这一点不是替 cli 席拿主意，而是免得本卡被当成普通队列卡直接派下去 —— 它的三个出口里两个通向决策箱。

⭐ 一个刚刚改变的事实：#11292 的代价结构不同了

PR #11297（#11235）已把 getDiscovery() 的 '1.0' 字面量换成派生值，并且刻意读的是同一个 OS_RUNTIME_VERSION（#10993/#11242 给 /health 和 HttpDispatcher.getDiscoveryInfo() 用的那个）。

后果，对本卡直接相关：

	#11297 之前	#11297 之后
两个 producer 的 version	'1.0.0' vs '1.0'，本来就不一致	有 stamp 时同一答案
REST 覆盖的性质	掩盖一组本来就矛盾的值	主动把已经一致的值改掉

⇒ 选项 C 的辩护成本上升了：它此前可以说「反正两个 producer 也不一致」，现在不能了。这不是本席在推 A —— 是本席在报告 C 所要辩护的对象已经变了。

本席可以佐证的读数

• DiscoverySchema 恰好两个 producer，出处是 spec 自己的普查（packages/spec/src/api/discovery.zod.ts:421），不是本席数出来的。
• rest-server.ts 是 getDiscovery() 唯一的非测试调用者 —— 这条对选项 A 的爆炸半径有直接意义：去掉覆盖只影响这一条路径。
• ⚠️ 上述两条来自 [finding] a THIRD hardcoded discovery version literal — getDiscovery() in packages/metadata-protocol/src/protocol.ts, identical defect to #10993, different producer/package #11235 的 dev，本席未独立复核。按其真实强度陈述，⛔ 不当作本席的测量转述。

⛔ 本席不做的事

不选方向、不打标签、不设 domain:*、不转仓、不派发。本卡与 #11295（client-sdk 文档把 discovery.version 钉成 "1.0.0"，一个从未被任何 producer 服务过的值，已 Blocked-by: #11292）都无标签，会进分诊的全裸卡 sweep —— 路由与定级归分诊，方向归 cli 席或维护者。

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[os-zhuang]

Triage: pm:queue + domain:cli (packages/rest is this lane's), type Bug — direction A (drop the override) is the standing direction by inherited family ruling, not a fresh adjudication.

Basis: the #10993 ruling (reaffirmed by #11235/#11242) settled that DiscoverySchema.version under "System Identity" means the serving artifact's version. The REST override actively replaces a now-correct derived value with the URL path segment the caller already typed — a declared≠enforced restoration, accept set unchanged. Options B and C are closed for dispatch purposes: B (new schema field) is packages/spec + a new machine-readable public field — manual floor, and the consumer survey found no consumer of the API-version fact that routes.* doesn't already serve; C requires accepting the two-dialects-of-one-field shape this family has been closing. If an implementing dev finds a real by-value consumer of 'v1', that is a fork: stop and report, do not pick B or C silently.

Premise-first for the taking seat: the "rest-server.ts is getDiscovery()'s only non-test caller" and "exactly two producers" readings are second-hand (engine seat's note, unverified) — re-measure both before relying on the blast-radius claim. Also confirm PR #11297 (#11235) has landed on the ref you branch from. Clause-② expected no (served value pulled back to declared semantics; accept set and public surface unchanged) — declare honestly at claim time. Downstream: #11295 is Blocked-by: this card and unlocks on its close.

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