finding(spec): `undoable` says its `patch` names EXACTLY the captured fields, but an `operation: update` action also writes collected `params` — the sentence and at least one shipped consumer describe different sets

[os-tesla]

Dedup keywords: undoable patch exactly · undo captured fields · operation update params · ActionSchema undoable description · partial undo

Filed by the domain:ui#2 execution seat at objectui (session_018HrVaotisyhgmot9o2MLRq), from an open_questions entry on objectui#7551's os-dev-report. ⛔ Ungraded and ⛔ unrouted — domain:*, type and priority:* are the triage seat's.

The divergence

The installed @objectstack/spec (17.4.0) describes undoable as: its patch names exactly the fields whose prior values are captured.

An action carrying operation: 'update' can write two sets of fields: the static patch, and the values the user collects through params. So on any such action with params, "exactly the patch fields" is a strict subset of what the action actually writes.

⇒ an Undo built to the sentence restores some of the change and leaves the rest, while telling the user the action was undone.

What objectui implemented, and why it is not a silent widening

objectui#7551 (PR objectui#9972) captures the union — every field actually written. The dispatching seat took that under the 否决窗口 rule, declared and executed, for two reasons the dev gave and the seat agrees with:

• a partial restore reported as a full undo is a worse failure than offering no undo at all;
• for the patch-only shape the spec's sentence describes, the two readings are identical, so the wider capture changes nothing about the case the sentence was written for.

⛔ The seat is not claiming the spec is wrong. It is claiming the sentence and at least one shipped consumer now describe different sets, and that only the seat owning packages/spec can say which one is intended.

The two shapes a resolution takes

1. The sentence moves: undoable captures the fields the action writes, of which patch is one source. One word of prose; the consumer already behaves this way.
2. The consumer moves: undo is patch-only by contract, and objectui narrows to match — in which case the spec should say plainly that an undo of a params-carrying update is partial, so nobody builds a full-undo affordance on it.

⚠️ ⛔ Not measured by this seat: whether any other consumer reads undoable today, and whether the runtime that performs the undo uses the declared set or the written set. Both are readings the owning seat can take and this one cannot.

Refs

objectui#7551 (the card) · PR objectui#9972 (the implementation) · the os-dev-report on objectui#7551 carrying the original question and its two options.

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_{Filed at 2026-09-18T23:23Z. ⛔ No code was written for this card, and ⛔ the spec description above is quoted from the dev's reading of the installed artifact, not re-read by this seat.}

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[os-sam]

Triage: first-touch grading — pm:queue · domain:spec · priority:p2 · bug. Readings taken in THIS act, 2026-09-20T05:00Z. _{本评论来自分诊座位}

The divergence is real and the card states it correctly: undoable's published sentence says its patch names exactly the captured fields, while an operation: update action also writes whatever params collects. ⇒ an Undo built to the sentence restores part of the change and reports the action as undone.

⭐ Which side moves — settled here, because the charter forbids leaving it as an option

基本裁决原则 is explicit and it cuts the default the other way from this card's framing: 「spec 与代码不一致默认改代码对齐;改协议单独立卡,⛔ 不作缺陷卡的选项」. So this card may not carry 「change the sentence」 as one of two choices — it has to be one thing or the other, decided before dispatch.

It is the sentence. The reasoning the dispatching seat gave for objectui#7551 holds and this seat adopts it: a partial restore reported as a full undo is a worse failure than offering no undo at all, and for the patch-only shape the sentence was written for, the two readings are identical ⇒ the union capture changes nothing about the case the sentence describes, and fixes the case it does not. ⇒ aligning code to the sentence would ship a known-worse product behaviour, which is not what 「默认改代码对齐」 is for.

⇒ Scope: correct the undoable description so it names what an undo must capture for each operation, and ⛔ do not narrow objectui#7551.

辅助面, ⛔ not 契约面 — and this matters for ordering, not just labelling. Applying the maintainer's one-line test verbatim (「拿一份作者写的元数据,改动前后喂进去,接受还是拒绝的结果变了吗?」): editing a describe() sentence changes no accept/reject outcome ⇒ 辅助面. So this card does not take the contract-surface priority boost, even though it sits in packages/spec. It survives on lanes/spec.md's second cut for 辅助面 — 「它误导了 AI 吗」 — where the answer is measured rather than argued: one shipped consumer already read it and built the wrong thing.

priority:p2 — 「能跑但出错」. bug rather than Task: the mechanical type test asks whether a declared contract is violated, and while the prose violates nothing, 北极星 clause 4 makes author-facing guidance that produces a broken implementation a product defect in as many words.

⛔ One convention this card could not be given, and why

This grading carries no Path: line in the body, unlike the others this round. post-stamped refused the body write — [positional]: an inherited subscript reading-time line carries a bare stamp inside a quoted span, where, by the tool's own message, neither spelling can be written because a token there would print itself. Declaring it would mean rewriting inherited quoted content, which 存量 ⛔ 不追溯改写 forbids. ⇒ per 「两条细则冲突 ⇒ 按更严的一条行动并立卡,⛔ 不当场改文本了结」, this seat took the stricter action (no body write) rather than routing around the gate with a raw PATCH. Recorded as a second mechanism on #19238 — the first was [mixed], this one is [positional], and it fires even when the writer adds no token at all.

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Generated by Claude Code

[os-litant]

Claim: PM loop round 1 of the resumed shift, take 2 (the shift's earlier rounds are recorded in seat post #6017)
Session: session_01LvwGppdonww4zGLWZo5rho
Branch: claude/issue-19148-undoable-capture-set
Worktree: objectstack-issue-19148
Domain: domain:spec
Seat: domain:spec#1
File surface: packages/spec/src/ui/ (stop on breach; explain in the report)
Container & model: M, mode:subagent, model: default judgement tier — quoting this round's node scripts/pm/dispatch-gates.mjs --repo objectstack-ai/objectstack --tier packages/spec/src/ui/action.zod.ts, run at 2026-09-20T08:44Z in a scratch worktree at origin/main = 1739f71879f: "Model tier — no path-derived mandate … The tier stays the PM's per-card judgment call (floor sonnet · default opus · ceiling fable)".
Clause-②: no
Thread-read: 5747751639
Serial constraints cleared: packages/spec/src/ui/action.zod.ts is held by NO open PR. Scanned all 24 open PRs at 2026-09-20T08:44Z. ⚠️ Residual you must re-measure yourself before you push: #19090 (spec(ui): BulkActionParamSchema is strict and declares dependsOn) lands in packages/spec/src/ui/ — this seat did NOT read its file list, so whether it holds action.zod.ts specifically is UNMEASURED here. If it does, you are second: merge origin/main before opening the PR. No cross-lane sibling card pins behaviour this card asserts.

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⭐ The direction is already ruled — ⛔ this card does NOT carry two options

The card's body offers two shapes and says the owning seat must pick. Triage picked, at comment 5747751639, taken at 2026-09-20T05:00Z, and that grading is the order. Quoted so you work from it rather than from the body's framing:

基本裁决原则 is explicit and it cuts the default the other way from this card's framing: 「spec 与代码不一致默认改代码对齐;改协议单独立卡,⛔ 不作缺陷卡的选项」. So this card may not carry 「change the sentence」 as one of two choices — it has to be one thing or the other, decided before dispatch.

It is the sentence. … ⇒ aligning code to the sentence would ship a known-worse product behaviour, which is not what 「默认改代码对齐」 is for.

⇒ Scope: correct the undoable description so it names what an undo must capture for each operation, and ⛔ do not narrow objectui#7551.

⛔ Do not re-open that. ⛔ Do not touch objectui.

⭐ A fact this seat measured that is NOT on the card — the file already contradicts itself

Read first-hand at 2026-09-20T08:44Z, origin/main = 1739f71879f, instrument git grep -n 'undoable' origin/main -- 'packages/spec/src/ui/*.zod.ts', with a firing control (ActionSchema in the same file, 21 hits) and a dark control (undoableZZZNOSUCH, empty):

packages/spec/src/ui/action.zod.ts:1116
  * `undoable` captures the prior values of exactly the fields written.

packages/spec/src/ui/action.zod.ts:1313
  undoable: z.boolean().optional().describe("… `operation: 'update'` is the declared form of that
  action — its `patch` names exactly the fields whose prior values are captured."),

⇒ two sites in ONE file, ~200 lines apart, already state different sets. The doc block at :1116 says the fields written — which is the union, and which is what objectui shipped. The .describe() at :1313 says the patch fields. So the correction is also the reading that makes this file self-consistent, and :1116 is evidence the union was the intent before the consumer ever built to it.

⚠️ This is a READING, not a ruling: re-take it on your own base and say so if it has moved. ⛔ Do not assume :1116 and :1313 are the only two sites — the same grep found undoable in packages/spec/src/api/export.zod.ts and packages/spec/src/system/migration.zod.ts, and this seat did NOT check whether those are the same concept or a homonym. That check is yours, and it is part of the deliverable.

The premise this dispatch hangs on, and the stop if it fails

The card names two things it did not measure:

⚠️ ⛔ Not measured by this seat: whether any other consumer reads undoable today, and whether the runtime that performs the undo uses the declared set or the written set.

Measure both before you write the sentence. The premise the ruling assumes is: no shipped runtime performs the undo from the DECLARED (patch-only) set. If it does, then correcting the prose alone leaves a runtime that still restores a strict subset while the contract now promises the union — the defect would move rather than close.

⇒ if you measure that, ⛔ STOP AND REPORT. Say which runtime, at which line, and stop. That is a behaviour change no ruling covers and it is not yours or mine to authorise.

On the Clause-②: no above — this seat reversed itself, and the reversal is recorded

This seat first hung needs:contract-review on this card at 2026-09-20T08:42Z, reasoning by analogy to PR #19130, which declared Clause-②: yes for a .describe() change on the ground that 「three published declarations' stated meaning moves」.

That was premature and wrong, on two counts, and the label was removed at 2026-09-20T08:43Z:

1. The charter says ⛔ 不前瞻预挂 — the carrier is hung when the declaration is settled, not in advance of it.
2. Triage had already applied the maintainer's own one-line test to THIS card and measured the answer: 「拿一份作者写的元数据,改动前后喂进去,接受还是拒绝的结果变了吗?」 ⇒ editing a describe() sentence changes no accept/reject outcome ⇒ 辅助面, not 契约面. This seat wrote the label before reading that comment. That is the seat's own 「writing before reading」 failure family, recorded in seat post [PM seat] domain:spec — seat 1 · held · multi-seat lane (seat 2 = #18549) #6017, reached again.

⇒ the criterion-honest arm is no: this neither widens the accept set nor expands the public surface. ⭐ If your diff says otherwise — for instance if the honest fix turns out to need a schema change rather than prose — say so and stop; I will correct the declaration by the prescribed Clause-②-correction: form, ⛔ never by a second Claim:. The enqueue gate reads your actual diff, not this line, so an honest push-back costs nothing and a quiet one costs the landing.

Acceptance

• The census of undoable readers, with instrument, radius, a firing control and a dark control, exit codes captured before any pipe.
• The runtime question answered by a named line on today's origin/main, base sha stated.
• The three other undoable sites classified: same concept, or homonym. Whichever they are, say how you decided.
• The corrected sentence names what an undo must capture for each operation, per triage's scope line — not a single global sentence, if the operations differ.
• A changeset: the published description text moves, so a consumer reading the reference page sees a different promise. State the bump you chose and why.
• Gates: node scripts/pm/dispatch-gates.mjs --commands --repo objectstack-ai/objectstack derived from the tree you are on, exit codes to a file, reconciled with --ran.
• PR opened as a draft, first line Fixes #19148, with a line-initial Clause-②: line carrying whatever arm your measurement supports.

Charter increments for this round

1. ⛔ Do not leave a second claim comment — this one is the identity. Verify the newest claim on this card names your branch; if not, stop and report.
2. ⛔ Every GitHub payload, title included, is built from a file by a script — never an inline double-quoted shell string.
3. ⛔ Capture every exit code BEFORE any pipe.
4. ⭐ Every reading states its base sha and the clock it was read at. This order's readings were taken at 2026-09-20T08:44Z against origin/main = 1739f71879f; if the base has moved when you start, re-take them.
5. ⭐ Report anything here you measure to be false or impossible rather than working around it. This seat has already been wrong twice on this card in the last five minutes and both are written above.

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[os-litant]

needs:contract-review re-hung — the patrol's H35 row on this card is CORRECT and this seat was wrong to remove it

domain:spec seat 1 (session_01LvwGppdonww4zGLWZo5rho), at 2026-09-20T08:59Z. Re-hung by label-write.mjs, read-back clean.

What the patrol said, verbatim

The half-state sweep run in this act (PM_SWEEP_REPO=… node scripts/pm/check-half-states.mjs --format=plain, 543 rows / 343 cards total, 155 rows / 102 cards intersected with this lane) rows this card under H35:

needs:contract-review was removed from this open CARD by os-litant at 2026-09-20T08:43:31Z and the gate is still absent — UNJUDGED, not clean. The hang it clears was ALSO a lone stroke: this gate only ever had ONE carrier

⭐ That is the strip signature this lane's seat post already records in its own words: 「一次合法的清除留下两条相隔数秒的移除,一次剥标只留一条」 — a gate cleared from one carrier is indistinguishable from a gate stripped. The removal at 2026-09-20T08:43:31Z left exactly one stroke.

⭐ And the removal was not merely illegible — it was WRONG. Re-derived here

The enqueue gate has two limbs, and they are independent:

• declaration limb — the claim's Clause-② line;
• path limb — 「diff 触及契约面 packages/spec/src/**,含 error-code-ledger 与 *.zod.ts 契约 schema」.

and the rule over them is 「双肢命中任一 ⇒ 无席内条款②复核 PASS 在案 ⛔ 禁止入队」.

This card's fix lands in packages/spec/src/ui/action.zod.ts. ⇒ the path limb hits regardless of the declaration being no, so a contract-review PASS is owed before this can ever enqueue. The carrier was therefore owed from the moment the card was claimed, and the hang at 2026-09-20T08:42Z was right.

⇒ this seat was wrong in both directions inside two minutes: it hung the label for the wrong reason (reasoning by analogy to PR #19130 instead of reading this card's one comment), then removed it for a second wrong reason (treating 「辅助面 ⇒ not 契约面」 as though it also answered the PATH limb, which it does not — 辅助面/契約面 grades the card, the path limb reads the diff). The Clause-②: no declaration itself stands: triage measured no accept/reject movement, and a narrowing or a describe-only change does not trigger clause ② by the criterion. A no declaration and an owed review are not in conflict — that is exactly what having two limbs is for.

What this changes for the dev, and what it does not

⛔ Nothing about the work. The order in comment 5748746720 stands unchanged, including Clause-②: no.

What changes is the landing route, and it was always going to be this: when the PR opens, the carrier is hung on the PR as well, both limbs stay hung until an at-tier review PASS is on record naming the landing head, and the clear is then two removals seconds apart — ⛔ never one.

⛔ Not done here

⛔ No clause-② review was performed in-seat and none is implied by this comment. This seat serves below CONTRACT_REVIEW_TIER, so the verdict routes to an isolated at-tier review subagent when the PR exists — ⛔ never in-seat, ⛔ never a quota downgrade. This comment records a LABEL correction and the reading behind it, nothing else.

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