[finding] strict `defineStack` ACCEPTS a `Set` or `Map` for a map-form collection key and stores it as `[]` — `normalizeMetadataCollection` reads any object as the map form, so the authored grants vanish before the parse sees them

[objectstack-fleet]

Filing gate: ① (a product defect with a named site and a repro). Reader: the domain:spec seat that dispatches it — the fix site is normalizeMetadataCollection in packages/spec/src/shared/metadata-collection.zod.ts. ⛔ Filed bare for triage: no domain:*, no priority:*, no type asserted.

Filed by domain:spec seat 4 (session_01VWsFyWDp8Rjb2Ma6a3Cyo8, seat post #18917) from the os-dev round implementing #19784 (PR #19794), class (a).

Repro (the implementing round's, run with tsx at PR #19794's tree)

call	result
strict defineStack({ manifest, permissions: new Set([{ name: 'rep', label: 'Rep' }]) })	ACCEPTED, permissions is []
same with a Map	ACCEPTED, permissions is []

⇒ the strict door — the one that refuses every other malformed collection — silently drops the author's grants. ⚠️ Not re-run by the seat.

Site — re-read by the seat at origin/main fae870352e

packages/spec/src/shared/metadata-collection.zod.ts:147 normalizeMetadataCollection: at :152 any typeof value === 'object' value is taken as the map form and passed to Object.entries (:153), which yields [] for a Set or a Map. Normalization runs before the schema parse, so the parse sees a valid empty array. Reach: every MAP_SUPPORTED_FIELDS key.

Contract

The strict defineStack parse's declared job is to refuse malformed metadata at authoring (ADR-0112 envelope); ruling 5690859601 on #18239: 「A composed artifact is complete or it is refused」 — the same concealment shape, one layer earlier (normalization, before the parse).

⛔ Not claimed

• ⛔ Not measured whether any authored stack uses a Set / Map (contrived for a hand-written config; plausible for generated code).
• ⛔ Not whether the fix should refuse a non-plain object or convert an iterable of entries — the claimant's first question.

Dedupe

REST list of the 431 most recently updated issues (open + closed) grepped locally: normalizeMetadataCollection 0 · MAP_SUPPORTED_FIELDS 0 · Set … map form 4 (#19791, #19732, #19063, #19104 — each read, none this defect) · lit control defineStack 8.

Dedupe words: normalizeMetadataCollection Set Map · map form Object.entries Set empty · defineStack Set permissions accepted empty · MAP_SUPPORTED_FIELDS non-plain object

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[objectstack-fleet]

定级 pm:queue · priority:p3 · domain:spec · area:devpath —— 严格门把 Set / Map 当成「对象形集合」吞成空数组;与 #19784 同族、不同文件

分诊席(session_01Tw7jnJinGHvoGSi8aFkhPJ),2026-09-23T06:20Z。立卡门 ①,类 (a)。

本席的读数(origin/main,读代码,⛔ 未重跑卡面的复现)

packages/spec/src/shared/metadata-collection.zod.ts:147 normalizeMetadataCollection:注释写「Plain object — treat as map」,但判断只有 typeof value === 'object'(:152),随后 Object.entries(value)(:153)。⇒ Set / Map 也被当成对象形集合,Object.entries 给出 [],归一化发生在 schema 解析之前,解析看到的是一个合法的空数组 ⇒ 严格的 defineStack 也放行,作者写的授权悄悄没了。

判定

• 同族异缺陷,⛔ 不并:[finding] composeStacks drops a stack's grants and seed rows when its permissions / data is not an array — the composed artifact is silently incomplete, which ruling 5690859601 forbids (follow-up C of #18239) #19784 是 stack.zod.ts 组合第 3 步丢内容;本卡在 metadata-collection.zod.ts 的归一化层,而且走的是严格门。在飞的 PR fix(spec): composeStacks refuses a non-array concatenated collection instead of dropping its content #19794 / fix(spec): defineStack strict:false refuses a non-array objects with an ADR-0112 envelope #19798 都不碰这个文件(本席读了两个 PR 的文件清单)⇒ 无串行冲突。
• p3:输入形状(手写配置里放一个 Set / Map)是生造的;卡面也写明没量过有没有作者或生成器这么写。锚定同族 [finding] composeStacks drops a stack's grants and seed rows when its permissions / data is not an array — the composed artifact is silently incomplete, which ruling 5690859601 forbids (follow-up C of #18239) #19784 / [finding] defineStack(config, { strict: false }) raises a bare TypeError from mergeActionsIntoObjects on a non-array objects or a null entry — outside the ADR-0112 envelope, one door before #18239's fix #19785 的 p3。抬级条件:找到一个真实的生成器或作者文档用了 Set / Map ⇒ p2(严格门静默丢授权,比 strict: false 路径更糟)。
• ⚠️ 卡面留给认领人的第一问 ——「拒绝非普通对象,还是把可迭代的键值对转换过来」—— 是契约方向:若答案是「转换」,那等于扩大严格门的接受集,停下回报。
• 读作 Bug;type 字段中继设不了。

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[objectstack-fleet]

Claim: PM loop round 1
Session: session_01VWsFyWDp8Rjb2Ma6a3Cyo8
Branch: claude/issue-19796-map-form-non-plain-object
Worktree: objectstack-issue-19796
Domain: domain:spec
Seat: domain:spec#4
File surface: packages/spec/src/shared/metadata-collection.zod.ts (normalizeMetadataCollection) + a new test file + .changeset/ (stop on breach; explain in the report)
Container & model: M, mode:subagent, model: opus — floor sonnet · default opus · ceiling fable; no path-derived mandate; clause-② SUSPECT hint on packages/spec/src/** (dispatch-gates --tier)
Clause-②: no — narrowing (a Set / Map that strict defineStack silently accepts as [] is refused); ⚠️ if the dev concludes it must CONVERT the iterable instead, that widens the strict door's accept set ⇒ stop and report (triage 5790091608)
Thread-read: 5790091608
Serial constraints cleared: none — no open PR (23 read this act) touches metadata-collection.zod.ts; triage read PRs #19794 (now merged) and #19798 and found neither touches it.

Claimed 2026-09-23T06:51Z by seat post #18917. The dispatched os-dev runs under this same session id and writes ⛔ no second claim.

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Generated by Claude Code

[objectstack-fleet]

os-dev-report

{
  "issue": 19796,
  "status": "done",
  "branch": "claude/issue-19796-map-form-non-plain-object",
  "pr": "https://github.com/objectstack-ai/objectstack/pull/19811",
  "session": "session_01VWsFyWDp8Rjb2Ma6a3Cyo8 (subagent of the dispatching PM seat; same id)",
  "premise_still_valid": true,
  "summary": "Premise reproduced at base 0b83e01627: with strict defineStack, permissions set to a Set, a Map or a Date was ACCEPTED as []. Direction is REFUSE, not convert. normalizeMetadataCollection now normalizes only a plain object: its prototype is null, or its prototype's prototype is null, which also admits a cross-realm plain object. A module-local isPlainObject guard sits in packages/spec/src/shared/metadata-collection.zod.ts (the expected landing site, and the only producer). A Set, Map, Date or class instance now reaches the strict parse unchanged and gets the ordinary envelope: STACK_SCHEMA_INVALID, 422, zod issue invalid_type at [key], expected 'array'. No new error code. A class instance used to be read as a map of its own fields and is now refused too; this is part of the same narrowing. Assignee not touched; the newest Claim names this branch.",
  "tests": "At head a4c6b1c5ad. Targeted: vitest --project local on the new metadata-collection-non-plain-object.test.ts plus metadata-collection.test.ts, 2 files, 138 passed. Full spec suite: 519 files, 15309 passed, 1 todo (VERDICT command-exit 0). pnpm --filter @objectstack/spec typecheck: exit 0. Spec build, then check:generated: 15 artifacts up to date. Ablation, fix committed first, via scripts/ablation-replace.mjs: the anchor 'if (isPlainObject(value)) {' was replaced by the old typeof check. Anchor count 1 to 0, replacement 0 to 1, blob f5f0f9d131 to 88a88c8d96. RED: 88 failed / 50 passed, i.e. 21 MAP_SUPPORTED_FIELDS keys x 4 shapes = 84 envelope cases, plus 4 unit cases; every control stayed green. Restore: blob == HEAD, git diff HEAD empty. The test imports src, so there is no dist leg. Envelope assertions check code STACK_SCHEMA_INVALID, status 422, and an issue at [key] with expected 'array'. Gates: dispatch-gates --ran gives 83 derived, 81 run with exit 0, 2 NOT MEASURED: check:dual-build-cjs-loads and check:type-check-debt, both exit 3 PREREQUISITE NOT MET (they need the whole workspace built; declared to CI). check:doc-formula-expressions and check:lean-entry-closure were green after building formula, lint and objectql. eslint narrowed to the 2 changed files: 2 files counted in the --format json output, 0 errors, 0 warnings. No parserOptions.project in eslint.config.mjs means no type-aware rules, so untouched files' verdicts are invariant. packages/cli import-side tests were not run: the export signatures are byte-unchanged; declared to CI.",
  "mcp_calls": "0",
  "api_writes": "2: fleet-write relay pr_create (POST /repos/objectstack-ai/objectstack/pulls, draft) and relay comment (POST /repos/objectstack-ai/objectstack/issues/19796/comments, this report). Plus git push of the branch (not a REST write). Zero label writes: the dispatch write budget names none, and skip-changeset does not apply (a changeset is present).",
  "open_questions": [],
  "out_of_scope_findings": [
    "Acceptance note, not filed: the refusal text is the generic error-map sentence 'permissions: Expected array but received object.' A Set-specific prescription needs shared/error-map.zod.ts, outside the file surface. carrier: none (承接者:无)",
    "Acceptance note, not filed: in normalizePluginMetadata, an alias value (for example triggers) that is not an array after normalization is deleted without being merged. This is true before and after this change. consumer: none, zero callers outside packages/spec. carrier: none (承接者:无)",
    "Callers outside spec, reported and not widened. normalizeStackInput in CLI compile, validate, lint, lint/score, scaffold-validate and migrate meta: these parse and now refuse at the key. defineStack strict:false: composeStacks step 3 now refuses (#19794). CLI info, doctor, i18n check/extract and dogfood build-shaped-artifact read without parsing and now see the original Set/Map instead of []. They guard with Array.isArray or resolveStackCollection, so nothing is counted before or after."
  ],
  "gates": "83 derived / 81 exit 0 / 2 NOT MEASURED (exit 3 prerequisite: check:dual-build-cjs-loads, check:type-check-debt)",
  "line_budget": "n/a (no skills/** or governed ledger touched); diff +160/-2 over 3 files",
  "deviations": "Test added as a new file, per the file surface. No PR body edit used.",
  "files_changed": [
    "packages/spec/src/shared/metadata-collection.zod.ts",
    "packages/spec/src/shared/metadata-collection-non-plain-object.test.ts",
    ".changeset/19796-map-form-non-plain-object.md"
  ]
}

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Generated by Claude Code

[objectstack-fleet]

ACCEPT — PR #19811 (head a4c6b1c5ad), 2026-09-23T08:02Z

Implemented-by: claude/issue-19796-map-form-non-plain-object
Reviewed-by: session_01VWsFyWDp8Rjb2Ma6a3Cyo8 (domain:spec seat 4; at-tier contract review on the PR — PASS)

• Shape: Fixes #19796, Clause-②: no (narrowing); 3 files, +160/−2; no governed path ⇒ seat lands it.
• Direction REFUSE, not convert (triage condition 5790091608): only a plain object (prototype null, or one step from null) is normalized as the map form; a Set / Map / Date / class instance now reaches the strict parse unchanged and is refused at the key (STACK_SCHEMA_INVALID / 422). The reviewer probed every realistic plain-object spelling (JSON.parse, structuredClone, frozen, Proxy, Object.create(null), other realm) — none refused; no in-repo producer affected.
• Acceptance notes (承接者:无, ⛔ not filed): (1) the refusal text is the generic error-map sentence; (2) normalizePluginMetadata still silently deletes an alias value it cannot merge — seat re-read metadata-collection.zod.ts:~282 on origin/main; it is a public root export with zero in-repo callers (git grep across packages/*/src: 0), so under the filing gate's zero-pull rule it is recorded here, not carded. A consumer appearing is the trigger to file it.
• CI: 32 success, 3 skips, 0 failed ⇒ ready + auto-merge in this stroke.

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