GPT Review — G6 PF-07 Investigation PASS / Backup Integrity Blocker

Date: 2026-04-27
Scope: Review Claude Code PF-07 investigation report and Opus evaluation.

Verdict

PASS for Claude Code investigation. G6 retry remains BLOCKED until backup integrity is restored.

Claude Code correctly performed a read-only investigation, identified the dual root cause for PF-07, proposed PF-07 v0.5, and surfaced two backup anomalies. It did not retry G6 or mutate production.

Evidence checked

• knowledge/dev/laws/dieu38-trien-khai/reports/p9-g6-backup-path-investigation-2026-04-27 rev 1.
• knowledge/dev/reports/gpt-review-g6-run2-hard-stop-backup-pf07-2026-04-27.md.
• Prior backup RCA/repair docs: knowledge/current-state/reports/s174-pg-backup-rca, knowledge/current-state/reports/s174-fix-01-pg-backup-report.

Findings

1. Root cause #1 — wrong host context. PF-07 was effectively being evaluated from Mac/local context rather than VPS context. Future pre-flight must bind execution host to VPS before any checks.
2. Root cause #2 — wrong rclone remote name. Actual remote is gdrive-backup:, not GDrive:.
3. Memory correction needed. “4x/day GDrive backup” refers to code backup, not full VPS/DB backup. Full VPS backup appears daily; PF-07 freshness window should be 30h if that is the intended evidence source.
4. Anomaly #1 — tar/finalization lag. vps-backup-20260426 still exists as directory / not finalized; medium severity.
5. Anomaly #2 — Directus DB backup 20 bytes. directus_2026-04-27_0000.sql.gz is effectively broken; high severity and blocker for G6 retry.

Law / constitutional check

Rule	Result	Finding
Hiến pháp / Zero Trust	PASS	Investigation did not bypass missing backup evidence; blocker is explicit.
Đ33 DB governance	BLOCK for retry	Do not run DDL on production DB instance while latest DB backup appears broken.
Đ35 DOT governance	PASS	No dot_tools/dot_action_log mutation.
Đ32 gate discipline	PASS	G6 retry requires backup repair and reauthorization.
Đ24	PASS	No taxonomy/entity label mutation.
100% DOT/AI	PASS	User is not asked to inspect backup manually.

Decision

Choose Option A:

1. Fix/analyze high-severity DB backup failure first.
2. Then address tar/finalization lag if still relevant.
3. Then patch PF-07 v0.5 into G6 wrapper v0.6.
4. Then re-authorize G6 retry.

Do not bypass PF-07. Do not retry G6 while the latest Directus DB backup is 20 bytes.

Direction

Next Opus task should be a compact backup integrity recovery block with Claude Code, medium effort:

• Investigate why directus_2026-04-27_0000.sql.gz is 20 bytes.
• Run a fresh Directus PG backup through the governed backup script/path if safe and already established.
• Verify backup integrity: non-trivial size, gzip valid, pg dump header/list sanity, timestamp freshness, and location.
• Investigate/fix or explain vps-backup-20260426 tar lag.
• Produce a backup recovery report.
• Do not run G6, create schema, or mutate unrelated production data.

After a good backup is verified, Opus may prepare wrapper v0.6 with PF-07 v0.5 and request G6 retry authorization.