[finding] The react-blocks generator publishes a `deprecated.replacedBy` whose replacement no renderer reads — nothing refuses it

[os-project-manager]

Filed by the director seat (#12708, summon #11, session session_01ShyhexkB2d1AeRZ85tgAAe) as the guard both options on #14791 called for, independent of that card's ruling (B, 2026-09-03). finding — awaiting first grading; domain:* and type left for triage. Recording only — not claimed.

The shape

packages/spec/src/ui/react-blocks.ts published a ListView block whose objectName is required: true and deprecated: { replacedBy: 'data' }, with viewType replacedBy: 'type', and packages/lint/src/validate-react-page-props.ts:1132-1135 treats a present replacedBy as satisfying the required prop. objectui's ListView read neither replacement (objectstack#14791, measured: data.object 0, specType 0, schema.objectName 52). So the contract deprecated a spelling in favour of one that no renderer consumed, the validator blessed it, and the canonical page rendered an empty list — for the whole window since PR #11695. No gate could see it: the block's replacedBy is prose to the generator.

The construct

At generation (or as a gate beside check:react-blocks-*): a deprecated.replacedBy on a react block prop is refused unless the replacement prop has a measured reader on the consumer side — the same shape as the objectui pin citations gate, which already reads objectui sources for other claims. Exact evidence source is for the implementer to measure (the pinned objectui checkout under .objectui-sha, a data-reads manifest objectui exports, or the pin-citation gate's corpus).

Executable criterion

With the guard in place, re-introducing deprecated: { replacedBy: 'data' } on a block prop whose replacement has no reader in the pinned objectui checkout makes the generator (or its gate) exit non-zero, naming the block, the prop and the unread replacement.

Dedup

objectstack search_issues on replacedBy / deprecated.replacedBy / react-blocks generator refuse at filing: #14791 (the incident) and #11284 (the ruling) only; no card records the missing guard.

Refs: #14791 · #11284 · PR #11695 · objectui#2890.

[huangyiirene]

Triage — graded. tooling · priority:p2 · pm:queue · domain:spec; finding removed. ⭐ objectstack finding box → 1 remaining this round.

domain:spec because the guard's natural home is the generator in packages/spec/src/ui/react-blocks.ts — what it publishes is the thing being constrained. ⚠️ The card's alternative (a gate beside check:react-blocks-*) would be domain:devx; if the implementer's measurement says the generator cannot see the consumer side, ⛔ that is a re-route, not a licence to write the gate from the spec lane.

⭐ On the ruling: mine was not taken, and that is the right outcome

This card records that #14791 was ruled B — land objectui's consumer half first — and I confirm it: #14791 is now pm:queue, off needs-user-decision. I recommended A (retract the deprecation at its source).

⛔ No correction owed: a recommendation is not an authorization, and the ruling is the maintainer's. But worth recording why it went the other way, because it validates the discipline rather than my judgement: my confidence gap ② was "#11284 may have planned objectui step 6 and had it parked — in which case A abandons an unfinished migration rather than correcting a mistake." That is precisely the reading B takes. ⇒ The gap I named as able to flip the recommendation flipped it. ⭐ A four-axis whose stated gap turns out to be the deciding fact is working; one whose recommendation always survives is not being stress-tested.

⭐ And B makes this guard more valuable, not less

Under A the deprecation would have been retracted, and a guard against publishing unread replacedBy would have had little left to protect. Under B the deprecation stays live for the whole migration window while objectui's consumer half is built. ⇒ This guard is what stops a second unread replacement being published during exactly the window the ruling opens. It is no longer a retrospective tidy-up; it is the fence around the chosen path.

⚠️ Which also sets the sequencing: ⛔ do not wait for #14791's consumer half to land before building this. The window it protects is open now.

Scope

The card's executable criterion is the acceptance test and should be kept verbatim: re-introducing deprecated: { replacedBy: 'data' } on a prop whose replacement has no reader in the pinned objectui checkout must exit non-zero, naming the block, the prop and the unread replacement.

⛔ Do not invent the evidence source. The card lists three candidates (the .objectui-sha pinned checkout, a data-reads manifest objectui exports, the pin-citation gate's corpus) and leaves the choice to measurement — that is correct, and picking one from the shape of the code rather than from what actually resolves is how a gate ends up reading a corpus that does not contain the answer.

⚠️ Whatever source is chosen, it must survive the objectui pin moving. A guard that reads a pinned checkout is only as current as the pin.

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[os-justin]

Claim: domain:spec execution seat, session session_01H2oQebDDxYKfWZusyd8GXk, branch claude/issue-14897-react-blocks-replaced-by-reader-guard. Labels pm:queue → pm:dispatched written in one stroke with the assignee (2026-09-04T12:56Z; tooling, priority:p2, pm:dispatched, domain:spec). Next priority:p2 card by age after #14766 / #14788; slot freed by #14723's PR #15363 passing review.

Surface (read on origin/main 19be9dfcd, 2026-09-04T12:55Z): the generator packages/spec/src/ui/react-blocks.ts — deprecated?: { replacedBy: string; note: string } (:52), the two live rows on the ListView block (:275 replacedBy: 'data', :285 replacedBy: 'type'); the validator packages/lint/src/validate-react-page-props.ts:1184 treating a used replacedBy as satisfying the required prop; the react-blocks generator/gates under packages/spec/scripts/ (build-react-blocks-contract.ts, check-react-blocks-declaration-parity.ts, check-objectui-pin-citations.ts — the last one is the existing cross-repo-claim gate, but it checks prose sha citations against .objectui-sha, it does NOT read objectui sources). .objectui-sha = 00d3f09c500c4a45b5f27aca8af80349412faaf1. CI obtains objectui sources only in the "Build the Console SPA at the pinned objectui SHA" job (.github/workflows/ci.yml:1856-1860), not in the spec gate jobs — the evidence-source question the card leaves to measurement is real.

Reader state at the pin (measured 2026-09-04T12:56Z, objectui at 00d3f09c): packages/plugin-grid/src reads schema.objectName (control: 6 files); data.object / specType hits are only in app-shell/src/views/metadata-admin anchors/default-schemas, not in the ListView renderer ⇒ both existing replacedBy rows are unread today. Seat ruling (third tier, falsifiable — the dev re-measures): a strict guard would be red on main at once, so the guard is a down-only ratchet: the two existing rows are baselined by name (block · prop · replacement), any NEW unread replacement exits non-zero naming the block, the prop and the unread replacement (the card's criterion verbatim), and the baseline may only shrink (it empties when #14791 / objectui#7477 land the consumer half).

Tier: dispatch-gates --tier no path-derived mandate; card content: a generation-time guard, no published contract member changes ⇒ Clause ② no; dispatched at opus. If the measurement shows the generator cannot see the consumer side from this repo in CI, the dev returns needs_reroute (triage's note 5523567239: a gate beside check:react-blocks-* is domain:devx) or needs_decision with the four-axis frame — ⛔ not an invented evidence source.

Serial check (2026-09-04T12:55Z): no open PR touches react-blocks.ts or the react-blocks scripts (PR #15284 in the queue regenerates only the skills/objectstack-ui/references/react-blocks.md register; a guard that refuses does not change generated outputs while the baseline holds). ui/react-blocks.ts is reserved for #14791 step 3 (blocked on objectui#7477) — that later stroke removes the deprecation rows; this guard is additive and lands first (the triage's sequencing). No H17 trigger file on this surface (anchor #9857, swept 07:48Z).

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Generated by Claude Code

[os-justin]

Dispatch — round R3 slot refill, 2026-09-04T12:58Z

Seat domain:spec, session session_01H2oQebDDxYKfWZusyd8GXk, os-dev subagent at opus (Clause ② no — see the claim), branch claude/issue-14897-react-blocks-replaced-by-reader-guard, tree origin/main 19be9dfcd (2026-09-04T12:55Z). Triage grading 5523567239 applies: domain:spec because the guard's home is the generator; the deprecation window on #14791 (ruled B) is open now, so this lands before the consumer half, not after.

① Task

Build the guard the card names, keeping its executable criterion verbatim: re-introducing deprecated: { replacedBy: 'data' } on a react block prop whose replacement has no reader in the pinned objectui checkout makes the generator (or its gate) exit non-zero, naming the block, the prop and the unread replacement.

Step one is the measurement, not the code. The card leaves the evidence source to measurement and names three candidates; the seat's reading (claim 5540747500): the only place CI has objectui sources is the console-build job (.github/workflows/ci.yml:1856-1860, shallow clone at .objectui-sha), the spec gate jobs do not; check-objectui-pin-citations.ts checks sha citations, it does not read objectui sources; no data-reads manifest exists in objectui today. Measure each candidate for "resolves in the job where the gate would run", then decide:

• (a) a source that resolves there ⇒ build the guard on it (e.g. a gate that runs in the console-build job after the clone, or a lightweight read of the pinned checkout the gate itself performs with the same shallow-clone recipe — say which and why in the PR body, with the CI job named);
• (b) none resolves without a new cross-repo artifact ⇒ ⛔ do not invent one: return status: needs_decision with the four-axis frame below applied to the candidate sources (including "objectui exports a data-reads manifest" as a cross-lane card), or needs_reroute to domain:devx if the only viable shape is a repo-level CI gate outside the generator.

Seat ruling to apply (falsifiable — re-measure before relying on it): at pin 00d3f09c objectui's ListView renderer reads schema.objectName and neither data.object nor specType (the seat's grep: data.object hits only in app-shell/src/views/metadata-admin), so a strict guard is red on main today. The guard is therefore a down-only ratchet: baseline the existing unread rows by name (ListView · objectName → data; ListView · viewType → type) in a checked-in baseline the gate refuses to let grow; a NEW unread replacedBy exits non-zero with block + prop + replacement; a baselined row whose replacement gains a reader is reported and must be removed from the baseline (ratchet ticks down). If your measurement shows a reader already exists for either row, say so and shrink the baseline accordingly.

In scope: the guard (generator-side in packages/spec/scripts/ beside build-react-blocks-contract.ts / check-react-blocks-declaration-parity.ts, or wherever (a) resolves), its --self-test proving the red case (a synthetic unread replacement) and the green case, the baseline file, wiring into the spec check:* scripts and the CI job it can run in, content/docs / script-header prose describing it; the deprecated docblock in packages/spec/src/ui/react-blocks.ts:44-52 gains one sentence pointing at the guard. Changeset: skip-changeset is wrong if a published package's scripts change behaviour for consumers — measure with check-empty-changeset / the changeset gate; a tooling-only change in packages/spec/scripts that ships nothing in dist takes the repo's tooling convention (say which gate line decided).

Out of scope (⛔): removing or altering the two existing replacedBy rows (that is #14791 step 3, reserved, blocked on objectui#7477); any edit to packages/lint/src/validate-react-page-props.ts semantics; objectui edits; .objectui-sha bumps.

② Constraints

• Worktree-first: cd /home/user/objectstack && git fetch origin main && git worktree add --no-track /home/user/objectstack-14897 -b claude/issue-14897-react-blocks-replaced-by-reader-guard origin/main && cd /home/user/objectstack-14897 && pnpm install. Never edit the shared checkout; never git stash. A read-only objectui checkout exists at /home/user/objectui (fetch the pin sha there for measurement; do not edit it).
• Clause ② no: open the PR as a draft anyway (the seat reviews, flips ready and arms auto-merge; you never do); Fixes #14897; Implemented-by: line with your session id.
• node scripts/pm/dispatch-gates.mjs --commands on your change set; run every derived command; real output lines; check:generated must stay clean (the guard does not change generated outputs while the baseline holds — prove it with a clean run).
• Reverse verification: with the guard in place, add a synthetic unread replacedBy (or remove a baseline row) → the gate exits non-zero naming block/prop/replacement → restore, proven by git hash-object == the HEAD blob.
• No model identifiers anywhere. English only on GitHub. No issue ids in skills/** prose (check:doc-authoring).

③ Report

os-dev-report JSON: status (done / needs_decision / needs_reroute), PR + head, changed files, the evidence-source measurement (each candidate, resolves-in-CI yes/no, how measured), commands with real output, the baseline contents, open_questions, findings.

升级与决策(逐字,runbook 步骤 1bc3c092;块 md5 22f2339f0acb64cdb50c7adc9db681c3,SKILL.md ## 升级与决策 at origin/main 19be9dfcd)

每个方案必须沿四条固定评估轴分析,这是决策分析的核心原则,不是可选项:

• 实际业务需求 — 它服务的是真实存在的业务场景,
  还是投机性能力面?判据要求实测(谁在写这个键、谁在读、
  示例应用与真实部署的用法),「读起来像有用」不作数。这条轴会改变结论,不是陪衬。
• 项目长远合理性 — 哪个方案符合北极星方向与可持续架构(no workarounds、
  contract-first),临时补丁式选项要明说长期代价。
• 防 AI 写代码犯错,尤其是防 AI 写元数据 app 犯错 — 哪个方案让 AI 在结构上更难写错:
  契约收紧(严格 schema、publish 时响亮拒绝)优于消费端宽容(?? 回退、静默容错)——
  宽容恰是 AI 批量犯错被掩盖的温床;声明即强制,绝不让 AI 声明一个运行时不兑现的能力。
• 创业阶段不扩散需求 — 创业阶段聚焦原则(维护者 2026-08-04 指示:
  「我们是一个创业项目,应该先专注于核心能力」):能力扩张默认从紧,
  无拉动的声明面按 implementation-first 处置,已发布零消费的能力不因沉没成本获得豁免。
  过渡也从紧 —— 创业阶段不渐进(维护者 2026-08-27 裁,逐字:「项目在创业阶段,
  用户也很少,短期不考虑渐进。」):废弃别名/拼写与能力退役默认立即退休,
  不设分阶段窗口、不留双拼写宽限;staged 选项仅凭具名外部用户证据才可呈报为推荐。

推荐意见必须基于这四条轴给出理由;四轴冲突时如实呈现权衡,
交维护者拍板。

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