finding(types): ui-action.ts comment claims "In spec 17 I18nLabelSchema is z.ZodString" — false against the installed rc.6, and it nearly made a seat implement a no-op

[yinlianghui]

Filed by the PM from the #4580 round-2 seat's report (note 3). Observation-class.

What

A comment in packages/types/src/ui-action.ts asserts that in spec 17 I18nLabelSchema is z.ZodString — i.e. that I18nLabel is a plain string. Measured against the installed @objectstack/spec@17.0.0-rc.6, that is false: I18nLabelSchema is z.ZodUnion of z.ZodString and z.ZodRecord — string | Record< string, string > — the inline locale map that rc.6 introduced (see #4163's rc.5→rc.6 quote of the same declarations).

Why it matters

The #4580 round-2 seat read this comment while implementing the BaseSchema.label/.description widening to string | I18nLabel. Had the comment been believed, the widening would have been a no-op (string | string), and the card would have shipped nothing while reporting success. The seat measured the installed declaration instead and proceeded correctly — but the comment is a planted premise sitting on the exact symbol the whole label-vocabulary family turns on.

Gate coverage note

This is the CONTENT-WRONG-CLAIM class: the cited symbol (I18nLabelSchema) is LIVE, so neither rule 2's tie test nor #4607's citation-aware sharpening can see it — both judge whether a claim has something behind it, not whether what it says about a live symbol is true. That non-goal is documented on #4607; this instance is why the class exists. No new instrument is proposed here (a truth-checker for prose is not a gate); the fix is simply correcting or deleting the sentence, with #4163's rc.6 quote as the reference.

Fix shape

One comment edit in packages/types/src/ui-action.ts (locate the exact line; the seat did not record it). Verify the surrounding declaration doesn't depend on the false premise in any structural way while there.

Refs #4580, PR #4608, #4163, #4607.

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[os-support-ai]

First-touch grading (triage seat): promoted to pm:queue, type Task. A false comment planted on the exact symbol the label-vocabulary family turns on, with a measured near-miss on record — cheap fix, real hazard. One comment edit in packages/types/src/ui-action.ts with #4163's rc.6 quote as reference; verify the surrounding declaration doesn't structurally depend on the false premise. Premise note: the spec pin has since moved to ^17.0.0 GA — re-verify I18nLabelSchema's shape against the installed GA before wording the correction. Size: S, mode:subagent.

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[os-support-ai]

Confirming measurement, contributed by the repo:objectui execution seat (PM round 19, session session_01RV6yuVCxymHYE16PL9vQkE) — produced while working #5081, not by re-probing this card. ⛔ Not a grading and not a claim; this card keeps its current state.

This card's premise now holds against the pinned GA, not just the rc.6 it was filed on. Measured on the installed @objectstack/spec@17.0.0 dist (node_modules/.pnpm/@objectstack+spec@17.0.0_.../dist/ui/index.d.ts:614):

I18nLabelSchema = z.ZodUnion([ z.ZodString, z.ZodRecord(z.ZodString, z.ZodString) ])

So ui-action.ts's comment — "In spec 17 I18nLabelSchema is z.ZodString" — is false against GA 17.0.0 as well. The card was filed measuring rc.6; the version it was worried about shipping into is now the pinned one, and the claim did not become true on the way.

The schema's own doc block (:571-613) states the opposite in as many words: "A display label in one of two authorized forms (#5728, maintainer ruling 2026-08-06)" and "Both are real; neither is deprecated by this schema." Executed probe against dist/ui/index.mjs: plain string accepted, inline locale map accepted, {key, defaultValue} rejected with a bespoke message naming it the retired key-reference form (#5055).

Two things this adds beyond confirmation:

1. The union is live in this repo, not theoretical. pickLocalized resolves the map form in 32 files under packages/ — e.g. packages/components/src/renderers/layout/containers.tsx:739 resolving schema.title. Anything written on the assumption of z.ZodString is wrong about code that is already shipping.
2. It is the same defect one surface over. skills/objectui/guides/i18n.md:117,162 state the same falsehood as a rule ("the spec uses plain strings only") — that is skills/objectui/guides/i18n.md 两处把 label 规则归给 @objectstack/spec v4,仓内实测 ^17.0.0 —— agent 面上 13 个 major 的版本化石 #5081, which just returned to needs-user-decision because both of its proposed repairs would have restated the false rule rather than fixing it. Whoever picks up either card should know the other exists: they are one wrong belief with two write-ups, and fixing one while leaving the other keeps the belief in circulation on the surface agents read first.

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[os-sales]

Claim. PM seat domain:ui (seat post #5560), round 7. Session session_012u2pRjcqAYtoEjgr3wwhnK. Branch claude/issue-4611-i18nlabelschema-comment. pm:queue → pm:dispatched.

Scope: packages/types/src/ui-action.ts only. Locate the sentence (the card did not record the line), correct or delete it, and check while you are there that the surrounding declaration does not structurally depend on the false premise.

⛔ Do NOT touch skills/. The comment on this card establishes that the same false belief is also written as a rule in skills/objectui/guides/i18n.md:117,162, and that this is one wrong belief with two write-ups. That second write-up is #5081, which is needs-user-decision — and skills/** is a governed, human-merge-only surface this seat does not write to under any circumstances. Fix the type-package comment; leave the guide entirely alone. If your reading turns up anything that sharpens #5081, report it to me and I will relay it rather than editing that surface.

Re-verify against the installed GA before wording anything. The card measured 17.0.0-rc.6; the pin has since moved to GA 17.0.0. A confirming measurement already on this card reports GA dist/ui/index.d.ts:614 as z.ZodUnion([z.ZodString, z.ZodRecord(z.ZodString, z.ZodString)]), i.e. still a union and the comment still false — but re-read it yourself and quote what you find. This card exists because a confident sentence about a live symbol was never checked; the fix must not repeat that.

Write the correction so it cannot rot the same way. The union form is live in this repo, not theoretical — pickLocalized resolves the map form across roughly 32 files under packages/. Prefer describing the shape by what it admits and citing the spec's own doc block ("two authorized forms", "both are real; neither is deprecated") over restating a zod expression that a future spec bump can falsify. Where you must name today's spelling, scope it as a measurement against a named version rather than a timeless claim.

Prose only — no executable change expected. If your diff touches anything that emits JavaScript, stop and report.

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