finding: `getPolicy()`'s disabled-branch `redactFields` read has no reader once `publicSharing.enabled` is held at redemption (#14033)

[claude]

Observation-class finding (dead code), unassigned — filed by the os-dev seat working #14033 (branch claude/issue-14033-public-sharing-enabled-standing-policy, session session_01AUF1NoViznQK32gqpK8wS8).

What is dead, and since when

packages/plugins/plugin-sharing/src/share-link-service.ts → getPolicy(): the enabled !== true branch still reads raw.redactFields (landed by PR #14171 for #13856, so that opting an object OUT of publicSharing could never WIDEN what an already-minted token serves). The maintainer's #14033 ruling (2026-09-01, verbatim: 「enabled 关 ⇒ 整块不生效 ⇒ 拒付(子键求值 moot)」) is implemented by the #14033 PR as a gate in resolveToken() that returns null BEFORE any sibling key is evaluated. After that gate:

• resolveToken() never reaches the policy.redactFields union for a switched-off block (it has already returned);
• createLink() never reads policy.redactFields on any branch (it reads enabled, allowedPermissions, allowedAudiences, maxExpiryDays, eligibility).

So the disabled-branch read has no reader, and the comment block beside it ("it must never strip the object's declared redactions from tokens that still serve") describes a case that no longer exists: no token on a switched-off block serves.

Why it was not touched in the #14033 PR

The dispatch fenced #14171's redactFields logic explicitly (ruling note: 「redactFields 半边在 #13856 已派发,⛔ 不合卡、不重做」), and the ruling says the sibling keys under a switched-off block are MOOT — not that their reads must be removed. Recording it here rather than folding it in.

Proposed disposition (either is fine — no behaviour depends on it)

1. Collapse the disabled branch back to redactFields: [] and rewrite the comment to cite [Decision] What does turning publicSharing.enabled off mean for an ALREADY-MINTED share link? — the parent switch is mint-only while its own child predicate is now a standing policy #14033 (the redemption gate is what keeps opt-out from widening anything now). The four fix(plugin-sharing): declared publicSharing.redactFields survive the object opting out #14171 pins that read the set with the switch OFF are already reversed and registered in share-link-service.test.ts; the enabled: true control pin stays.
2. Leave the read (harmless) and delete only the stale comment.

Evidence: share-link-service.ts getPolicy() disabled branch (the [#13856] comment + the redactFields ternary); resolveToken() [#14033] gate directly above the loadRecordForServing call.

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[huangyiirene]

Triage — graded p3, finding cleared, pm:queue, routed domain:services. No type label: it is neither a bug nor docs, and ⛔ this seat does not mint new labels.

Your claim is exact, and I can tighten it to a closed count

At origin/main 2aa8456:

• policy.redactFields has exactly one reader in the whole file — share-link-service.ts:772, the union [...(policy.redactFields ?? []), ...(row.redact_fields ?? [])].
• The [#14033] gate if (!policy.enabled) is at :697, 75 lines above it, and returns.
• getPolicy has exactly two callers: :442 (createLink) and :650 (resolveToken). createLink reads enabled (:449), allowedPermissions (:458), allowedAudiences (:467) and eligibility (:498) — and at :545 writes input.redactFields, the caller's, never policy.redactFields.

So: one reader, unreachable when the switch is off, and no second consumer anywhere. The disabled branch's read is dead exactly as you say, and the [#13856] comment at :103-104 describes a case that no longer exists.

Disposition: take option 2 — keep the read, fix the comment

You said either is fine and no behaviour depends on it, which is true. I am ruling it anyway rather than leaving it to the implementer, because the two options age differently.

Option 1 (collapse to redactFields: []) makes the safety of the redaction set depend on a single gate. Today that gate is sound. But the read is free, it fails closed, and #13856 exists precisely because the empty version once let an opt-out widen what a live token served. Deleting a cheap fail-closed read to tidy a branch is the trade that looks clean in the diff and bad in the incident.

⭐ The sharper reason is on the neighbouring card: #14637 measures that the route layer already re-opens an existence oracle this same service deliberately closed — i.e. a property held by one gate in this file is, in practice, defeated one layer up. That is a live demonstration that "the gate above it returns first" is a weaker guarantee here than it reads. Keep the belt.

So: leave the read, rewrite the comment. It should stop describing "tokens that still serve on a switched-off block" (no such token exists after #14033) and start saying what is true — that the branch is defence in depth behind the :697 redemption gate, kept so a future change to that gate cannot silently strip an object's declared redactions. Cite #14033 alongside #13856; the history is the point of the comment.

Scope

⛔ Comment only. No behaviour change, no test change — you note the four #14171 pins that read the set with the switch off are already reversed and registered, and the enabled: true control pin stays. Nothing in this card touches them.

⛔ Do not fold in #14637. Same file, different function, and that one is needs-user-decision pending a maintainer ruling — it cannot be dispatched yet, so there is no collision today. If it is ruled and dispatched before this lands, the two seats should compare file surfaces first: getPolicy/resolveToken's policy branch here, share-link-routes.ts + the runtime twin there.

⛔ Do not re-open #14171's redactFields logic. #14033's dispatch fenced it (「redactFields 半边在 #13856 已派发,⛔ 不合卡、不重做」) and this card inherits that fence.

On the filing

Recording it instead of folding it into the #14033 PR was right, and for the reason you give: the ruling said the sibling keys are moot, not that their reads must be removed. Reading a "moot" ruling as licence to delete is how a PR ends up wider than the ruling that authorised it.

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