P3D Pack 1 Phase 5C1 — rev4 Final Hardening Patch Report

Date: 2026-05-11 Author: Opus 4.7

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1. Status flags

phase5c1_rev4_status                 = PASS
traceability_clean                   = true (no rev2/rev3 remnants)
advisory_lock_non_blocking           = true (pg_try_advisory_xact_lock)
collection_registry_introspected     = true (§2.1 + §2.2 concept resolution)
section_reference_fixed              = true (§1 now references §8.C correctly)
species_identity_unchanged           = true
transaction_structure_unchanged      = true
prompt_dispatch_allowed              = false_until_GPT_FINAL_REVIEW_AND_USER_GO

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2. 4 fixes applied (rev3 → rev4)

#	Issue	Fix
1	Traceability: old rev2 header/status remnants	Full clean rewrite. Single header "rev4". All metadata consistent.
2	Advisory lock blocks forever	Changed pg_advisory_xact_lock → pg_try_advisory_xact_lock. Returns lock_acquired boolean. If false → ROLLBACK + BLOCKED_LOCK_BUSY, no wait, no retry.
3	collection_registry not introspected	Added to §2.1 (4th table introspection). §2.2 resolves collection_key + governance_role concepts. G0-4/G0-5 use resolved column names.
4	§8.E reference (should be §8.C)	§1 error handling now correctly references §8.C for post-rollback verification.

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3. Confirmation

✓ Clean rev4 — no cruft from previous revisions
✓ Non-blocking advisory lock with explicit BLOCKED_LOCK_BUSY status
✓ collection_registry introspected before G0-4/G0-5 governance_role check
✓ All section references correct
✓ Species identity, transaction steps, gates unchanged
✓ rev4 DISPATCH CANDIDATE — GPT final review + User GO required

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Phase 5C1 rev4 Patch Report | 4 fixes | Clean rewrite | 2026-05-11