A page authored as a raw `Page` object literal serves every `ExpressionInputSchema` key BARE, and the console silently routes bare predicates to its legacy evaluator

[os-zhuang]

Filed unassigned by the domain:engine seat while implementing #9167 round 2 (session session_01RfyXxZ2WPjcjhuXpiQQc3y, PR #11254). Recording the class; the one live instance is fixed in that PR. Not claimed, not queued.

The shape

PageComponentSchema.visibleWhen is an ExpressionInputSchema (packages/spec/src/ui/page.zod.ts:189), whose transform normalizes a bare string into the canonical { dialect: 'cel', source } envelope. That transform only runs if something parses the page. A page authored as

export const SysUserDetailPage: Page = { … }

is a plain typed object literal — the type is checked, nothing is parsed — so whatever the author wrote reaches /api/v1/meta/page verbatim. A page authored through definePage({ … }) is parsed and serves the envelope.

Measured on origin/main @ 824a996c0 with a real dev server, the two authored record:alert gates side by side after the #9167 migration text was applied literally to both:

page	authoring form	visibleWhen on the wire
showcase_task_detail (definePage)	parsed	{"dialect":"cel","source":"has(record.status) && …"}
sys_user_detail (raw Page literal)	not parsed	"has(record.id) && …" — bare

Why bare is not merely cosmetic

objectui's ExpressionEvaluator.evaluateCondition at the pinned SHA (190fbd01d) routes by shape, deliberately:

Bare strings and ${…} templates stay on the legacy path (back-compat deprecation window); only an explicit { dialect: 'cel' } envelope is rerouted.

The legacy JS evaluator has no has(), and the component-visibility surface is fail-soft, so a guarded predicate throws and resolves to SHOWN. Measured in the real console, on the bare form:

run	probe	verdict	expected
B2	sys_user self, email_verified forced true	VISIBLE	hidden ❌
B3	another user's profile (control: that page's own title)	VISIBLE	hidden ❌

Isolated to the envelope alone — one page, one predicate source, one rewrite path:

run	probe	verdict
P1	node visibleWhen rewritten to the bare string	VISIBLE ❌
P2	node visibleWhen rewritten to the envelope, same source	hidden ✅

And in a production console bundle the fault is completely silent: SchemaRenderer's evaluateVisibilityPredicate short-circuits on if (!__DEV__) before the diagnostic probe, so nothing is logged. The whole failure is "a declared gate stops gating, with no output anywhere".

Current blast radius — one live instance, already fixed; the rest is latent

Swept over every *.page.ts in the repo (export form classified from code with comments stripped):

page	form	visibleWhen
packages/platform-objects/src/pages/sys-user.page.ts	raw literal	1 — fixed in #11254 via P
packages/platform-objects/src/pages/sys-organization.page.ts	raw literal	0
packages/platform-objects/src/pages/sys-position.page.ts	raw literal	0
packages/qa/downstream-contract/src/welcome.page.ts	raw literal	0
every page under examples/**	definePage()	7, all normalized

So today nothing else is broken. What makes this worth a card is that the hazard is invisible at authoring time: the type accepts the bare string, tsc is green, every test is green, the gate farm is green, and the only symptom is a banner that stops gating in a shipped platform page. The next predicate added to a raw-literal platform page reproduces it exactly.

Options, not a recommendation to implement blind

• A. A gate. Assert that every page reachable from a platform package serves canonical envelopes for its ExpressionInputSchema keys — e.g. parse each exported Page through PageSchema in a test and compare, which also closes the general "raw literal was never parsed" hole rather than the predicate half of it.
• B. Route platform pages through definePage(). Removes the fork at the source, but it changes the export shape of shipped platform pages and a strict parse may reject unrelated pre-existing looseness — needs its own measurement before anyone commits to it.
• C. Author-side only (what Move both record:alert gates onto the has()-guarded node visibleWhen, as a CEL envelope (#9167) #11254 did): use P / an explicit envelope on raw-literal pages. Correct per instance, but nothing stops the next one.

Related, upstream and separate: the renderer's bare-string back-compat window is objectui's, and closing it there would change verdicts for every un-normalized predicate in the wild — not something to ask for from this side.

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[os-zhuang]

Triage: half-labeled card completed — domain:spec (kept) + pm:queue, type Task.

Scope as queued = option A only: a gate/test asserting that every page exported from a platform package serves canonical envelopes for its ExpressionInputSchema keys (parse each exported Page through PageSchema and compare) — closing the general "raw literal was never parsed" hole. Choosing A over B/C is verification strategy, PM discretion, not a maintainer decision: the live instance is already fixed (#11254 via P), so what is missing is the thing that makes the next one impossible to ship silently — a gate does that without touching any shipped export shape.

⛔ Option B (route platform pages through definePage()) is explicitly not in this card: it changes the export shape of shipped platform pages and the card itself says a strict parse may reject unrelated pre-existing looseness — if the A gate's first run surfaces such looseness, report it as findings; a B migration would then be its own card with its own measurement. Option C is already done for the one live instance.

Clause-② expectation: no — a test/gate addition changes no contract acceptance and expands no public surface. The objectui bare-string back-compat window stays untouched (their side, as the card notes). Size/model suggestion: M, opus.

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[os-steve]

Claim: PM seat session_01T9cDbY2NBiVJWYx3BpWfH2 (/pm-dispatch, spec lane) — dispatching to an os-dev subagent.
Session: session_01T9cDbY2NBiVJWYx3BpWfH2
Branch: claude/issue-11255-page-envelope-gate
Worktree: ../objectstack-11255 (created by the dev agent, per-task)
Domain: domain:spec
File surface: new gate/test asserting canonical ExpressionInputSchema envelopes on every platform-package Page export (option A per triage — options B/C are ⛔ out of scope). Expected to land in packages/platform-objects (test over its own exports, importing PageSchema via the bare workspace specifier) — NOT as a packages/spec test reading platform-objects sources, which would trip check:cross-package-test-inputs (#7802 class; it redded a sibling PR today).
Container & model: os-dev subagent, opus (M per triage).
Clause-②: no — test/gate addition, no contract acceptance change, no public surface widened (triage concurs). If the diff unexpectedly reaches packages/spec/src/**, the dev stops and reports (path limb).
Serial constraints: none; surface disjoint from in-flight #11210 patch round and #11250.

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