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Checkpoint — FIX7 P0 Implementation Planning (2026-06-11)

• Final status: FIX7_P0_IMPLEMENTATION_PLANNING_PACKET_READY
• Host: T1 / Claude Code / MYTHOS · Authority: PLANNING_NON_AUTHORITY
• Codex consulted: NO · Owner approval requested mid-run: NO
• Production mutation: NO · Implementation execution: NO · REAL_RUN/QT001/permit/activation/repoint/cutover: NO

What this macro did

Consumed the official Codex N7 → N8 → P7 seal (owner OPT-3 = planning-only) and produced a paper-only FIX7 P0 birth-blueprint implementation planning packet. No implementation executed; no production touched.

Seal consumed (verified)

• N7 efb0c574…53d32 · N8 daa70c39…7e1a1 · P7 9ddb27c3…34550 (all read back == macro chain).
• Codex seal packet tree 3890cd34…a234 = sha256(HASH_MANIFEST) — match.
• canonicalizer rev3 49c386a9…b734d0 (38756 B) · Packet V3 b95df0a5…ca6d · N6 d777e87c…b258c.
• P7 boundary: implementation_authorized_by_p7_alone=false; execution + production remain blocked.

Packet

knowledge/dev/reports/architecture/fix7-p0-implementation-planning-packet-2026-06-11/ (16 files; packet_tree f470d0d019f9af63794ce943a64ea08ff31a17906a7857f4124d0b1e14a0fe8f).

• bash RERUN.sh → HASH_MANIFEST OK · packet_tree match · validator exit 0 · probes 15/15 fail-closed, any_fail_open=false · exit codes byte-match · RERUN_RESULT: PASS.
• KB round-trip byte-exact: 14/14 files reconstructed from KB-stored bytes → shasum -c all OK → RERUN PASS.

Deliverables (Workstreams A–H)

A seal-consumption · B mutation inventory (10 surfaces, all allowed_now=NO) · C precondition checklist (12 items, execution_ready=false) · D dry-run design (staging-only) · E rollback design (rollback_proof_status=NOT_YET_PROVEN) · F evidence/audit plan · G owner/operator execution decision packet (default HOLD) · H planning validation probes (15/15 fail-closed). Main report + checkpoint + current-state + governance addendum.

Governance

TKT-OBJ-343..377 (PROPOSED) via standalone addendum fix7-p0-implementation-planning-governance-addendum-2026-06-11.md. Collision-clear above the prior ceiling 342 (T2 base pack). Canonical registry JSON rev20 / 00-index not rewritten (T1/T2 fold race still open) — standalone addendum only.

Standing blockers (owner/operator only)

FIX7-P0-PLAN-EXEC-AUTH-1 (OPT-4) · …-SURFACE-1/-2 (production/CI scope) · …-REALRUN-1 · …-SEPARATE-AUTH-1 · …-RECHECK-1 · …-ROLLBACK-PROOF-1 · …-FIRSTSTEP-1.

Next macro (minimal)

Owner/operator reviews the execution decision packet (default HOLD). If AUTHORIZE_DRYRUN_ONLY, route to a separately-authorized dry-run macro (staging/temp, no production).