P3D Pack 1 Phase 5C1 — rev2 Transaction-Safe Patch Report

Date: 2026-05-11 Author: Opus 4.7 Mode: PROMPT PATCH ONLY — no execution

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1. Status flags

phase5c1_rev2_status                 = PASS
mode                                 = PROMPT_REV2_DISPATCH_CANDIDATE_ONLY
species_identity_locked              = true
transaction_boundary_explicit        = true
stop_gates_operational               = true
capture_lifecycle_separated          = true
in_transaction_stale_checks          = true
default_verification_from_introspect = true
post_rollback_verification           = true
prompt_dispatch_allowed              = false_until_GPT_FINAL_REVIEW_AND_USER_GO
agent_dispatch_allowed               = false

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2. 5 fixes applied (rev1 → rev2)

#	GPT issue	Rev2 fix
1	No transaction boundary	§4 wraps ALL writes in single BEGIN→COMMIT. Any gate failure → ROLLBACK. No partial commit possible.
2	Stop gates too prose	§1 explicit: ON_ERROR_STOP=1, no retry, no improvisation, no continue after failed gate, report failed_gate_id.
3	Capture keys not split pre/post commit	§3 = precommit_target_capture (diagnostic if rolled back). §5 = committed_rollback_keys (written AFTER COMMIT, the only valid rollback reference).
4	Stale-sensitive checks not repeated in transaction	§4.1 T-G1..T-G4: collision, dedupe, and target count re-checked INSIDE transaction. If stale → ROLLBACK.
5	Defaults hardcoded instead of introspected	§2.4 extracts actual defaults from introspection (status_default, depth_default, mgmt_mode_default, is_primary_default). §4.3/4.5 verifies against introspected defaults, not hardcoded values.

Bonus: §8.C adds post-rollback verification (PRV-1..3) to confirm pre-state fully restored after any ROLLBACK.

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3. Top 7 safety gates (rev2)

1. §2.3 Fill policy: unexpected NOT NULL column → ABORT before transaction
2. T-G1/T-G2: collision re-check INSIDE transaction (TOCTOU defense)
3. T-G3: mapping dedupe re-check INSIDE transaction
4. T-G4: backfill target count matches precommit capture (no rows appeared/disappeared)
5. §4.3 management_mode trap: verify observed ≠ mgmt_mode_default (governed)
6. §4.8 zero NULL: no remaining NULL species after backfill
7. §8.C post-rollback verification: confirm clean state after any ROLLBACK

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4. Confirmation

✓ Single transaction for all writes
✓ ROLLBACK on any gate failure — no partial commit
✓ Stale-sensitive checks repeated inside transaction
✓ precommit_target_capture vs committed_rollback_keys separated
✓ Defaults verified from introspection, not hardcoded
✓ Post-rollback verification added
✓ Species identity unchanged (GPT-locked)
✓ 0 numeric gates
✓ ON_ERROR_STOP=1 + no retry + no improvisation

Status = rev2 DISPATCH CANDIDATE
Requires: GPT final review → User GO → Agent dispatch

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Phase 5C1 rev2 Patch Report | Transaction-safe | 5 fixes applied | GPT final review required | 2026-05-11