P3D Pack 1 Phase 5C2 — rev3 Parallel IU Pilot Patch Report

Date: 2026-05-12 Patched: rev2 → rev3

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Top 10 rev3 changes

1. TAC→UI preservation contract — New §0 with 4 binding tags: NO_TOUCH, PARALLEL_ONLY, REDIRECT_FORBIDDEN, TAC_CANONICAL. Explicit: no Nuxt change, no route change, no TAC mutation, no UI cutover.

2. Multidimensionality guard — New §2: "writes ONE coordinate (species+lớp), does NOT implement global 6-lớp logic, does NOT branch by loài/lớp/Layer."

3. Baseline = reference, not gate — baseline_member_count_reference=36 declared as REFERENCE ONLY. Runtime uses source_count_live for assertions. No hardcoded count in any assertion.

4. Owner NULL → ABORT — PF-9: if any source row has NULL owner_lookup_ref → ABORT. No fallback locked. Rev2 had no explicit policy on this.

5. fn_iu_create shape discovery hardened — G0-13 requires resolved result keys before write. SAVEPOINT test must verify 0 residual including birth_registry side effects.

6. Entity Living DB hooks table — New §11: explicit mapping of 6 headings → what hooks exist after migration → what enrichment path follows.

7. Rollback + 0 residual verification — §9C: post-rollback must verify 0 residual IU + 0 UV + 0 birth rows by captured IDs + source counts unchanged.

8. ui_cutover_performed=false — Always false in final response. Enforced in hard boundaries.

9. Advisory lock key updated — Changed to p3d_pack1_phase5c2_dieu35_parallel_iu_pilot (reflects parallel pilot mode).

10. Report fields expanded — Added tac_ui_untouched, ui_cutover_performed, owner_null_abort, baseline_member_count_reference.

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What stayed from rev2

D3a hybrid, fn_iu_create, concept registry (~30 concepts), 13 GATE-0, 9 PF, transaction-scoped lock, verify-before-commit, exact-key rollback, VPS log, birth 4-level verify, content hash verify, invariants verify, TAC never written.

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Confirmation

phase5c2_prompt_rev=3
gpt_final_review_required=true
user_go_required=true
agent_dispatch_allowed=false
phase5c2_migration_allowed=false
ui_cutover_allowed=false

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rev3 Parallel IU Pilot Patch Report | 2026-05-12