[finding] `os:check` doc blocks type-check but never run `os validate` — a docs example can carry an author-time lint error (e.g. missing `sharingModel`) and no gate sees it

[os-zhuang]

Split out of #10581 (member of sweep #10616) — the sweep fixes the 22 instances; this card records the CLASS.

Observation

packages/spec/scripts/check-skill-examples.ts compiles {/* os:check */} fenced blocks in content/docs/**, so nonexistent identifiers and type errors are caught. But author-time lint rules enforced by os validate (packages/lint/**) never run over those blocks. Measured consequence: 22 ObjectSchema.create() examples omitted sharingModel — z.enum([...]).optional() with no .default(), so the omission type-checks clean, while os validate rejects it as severity: 'error' (SECURITY_OWD_UNSET, packages/lint/src/validate-security-posture.ts:266-281). A reader copying a canonical docs example gets a failing os validate with no hint from the page.

Shape of a fix (for grading, not a ruling)

Run the relevant packages/lint author-time rules (or full os validate) over os:check blocks that construct authorable metadata (ObjectSchema.create at minimum). Producer is the spec-lane docs-gate toolchain (packages/spec/scripts/**), hence domain:spec (same anchoring as #10457).

Grading questions for first touch

• Cost/benefit: the instances are being fixed by sweep sweep: docs-audit wave (#10563) — 13 factual corrections across content/docs/** where the page contradicts the enforced platform #10616; the gate prevents recurrence. Does the docs surface churn fast enough to pay for a new gate now (创业阶段聚焦)?
• If promoted, scope narrowly: lint the constructed object literal, not the whole page pipeline.

Back-links: #10581, #10616, #10563. Dedupe: semantic search zero-hit, channel verified against #10563.

[os-zhuang]

First-touch grading (triage): promoted — finding → pm:queue, type Task, stays domain:spec. The grading question the card poses answers itself with its own measurement: 22 broken canonical examples in one sweep is enough churn evidence that the class will recur, and the docs surface is being actively rewritten (docs-audit waves #10563/#10616 in flight). Scope per the card's own narrowing: lint the constructed authorable metadata literal (ObjectSchema.create at minimum) inside os:check blocks — not the whole page pipeline. Sequencing: land after sweep #10616 fixes the 22 instances, or the new gate turns red on main at birth.

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[os-elon]

Claim: PM loop round 2 (slot reuse after #10054 collection)
Session: session_01B4h3medzvhB9rpfoja9jcw
Branch: claude/issue-10618-oscheck-validate-gate
Worktree: objectstack-issue-10618
Domain: domain:spec (spec-lane docs-gate toolchain, same anchoring as #10457)
File surface: packages/spec/scripts/check-skill-examples.ts (or a narrowly-scoped sibling script it drives), root package.json script wiring + the CI workflow row if the repo's gate-wiring convention demands it, self-test additions, .changeset/ decision per gates (stop on breach; explain in the report)
Container & model: M, mode:subagent, model: claude-fable-5 — NEW gate semantic design (what the gate refuses is the judgment; lane norm: 门禁语义设计升 fable); Clause-②: no (repo tooling, no contract acceptance change)
Clause-②: no
Serial constraints cleared: sequencing precondition satisfied — sweep #10616 closed via PR #10714 MERGED 09:47Z, the 22 broken examples are fixed on main so the gate is born green; in-flight overlap — #10671 (publish-smoke-port-collision.test.ts, same directory different file), #10731 (ai/agent.zod.ts), #10054 landing (ui/component.zod.ts family) — all disjoint. H17 index: no hit (check-cross-package-test-inputs.mjs at scripts/ root is hold #10315's trigger — NOT in surface; if wiring touches it, report the touch).

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[os-elon]

Claim surface amendment (same session session_01B4h3medzvhB9rpfoja9jcw, branch claude/issue-10618-oscheck-validate-gate) — two changes to the declared file surface, both explained in the forthcoming PR body:

1. Gate home moved to packages/lint/scripts/check-doc-security-posture.mjs (+ packages/lint/package.json script row) instead of a packages/spec/scripts/ sibling. Reason: the verdict is validateSecurityPosture from @objectstack/lint, and packages/spec cannot depend on lint (lint depends on spec — a reverse devDependency cycles the turbo build graph). The repo's own recorded precedent for exactly this shape is check:doc-formula-expressions ("its home in packages/lint (which owns that verdict)", lint.yml). CI row added beside that precedent in the same post-build job that runs check:skill-examples.

2. Bounded in-class fixes: 8 content/docs/** pages added to the surface. The gate's first run on current main (sweep docs: 13 factual corrections across content/docs/** where the page contradicts the enforced platform (#10616 sweep) #10714 merged) found 8 more ObjectSchema.create sites in os:check blocks missing sharingModel, on pages outside [finding] 22 object examples across 12 docs pages omit sharingModel — the platform's own os validate rejects every one of them #10581's audited 12-page scope: plugins/development.mdx, protocol/kernel/i18n-standard.mdx, protocol/kernel/lifecycle.mdx, protocol/kernel/plugin-spec.mdx, protocol/objectql/schema.mdx (x2), protocol/objectql/state-machine.mdx, ui/field-grouping-and-order.mdx. Same defect class as this card; fix shape pinned by the merged docs: 13 factual corrections across content/docs/** where the page contradicts the enforced platform (#10616 sweep) #10714 sweep (explicit sharingModel, 'private' per the rule's own recommended default; showcase_contact mirrors its real counterpart in examples/app-showcase); no competing claim on any of these files (checked git ls-remote branches + open issues). Fixing them in-PR is what "born green" requires — exempting them at birth would ship a gate green over live instances of its own class.

Also measured: skills/ has 4 more instances of the class in marked blocks (objectstack-data/SKILL.md x3, objectstack-upgrade/SKILL.md x1) — NOT touched here (skills/** is a governed surface, PD#14); will be filed as a separate unassigned issue.

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