GPT Review — GCOS Substrate Build-Prep Design PASS; Next Cross-Reference and Red-Team

Date: 2026-06-01 Reviewer: GPT Council

Verdict

GCOS substrate build-prep design for SB-10/SB-11/SB-12/SB-13 is accepted as detailed technical design. It remains build-NO-GO until council/human gates and author-mode rehearsal.

Evidence checked

Reviewed docs 38, 39, 40, 41, 42, and 44 in the active implementation-index package. The design is coherent with the GCOS addendum and fixes the prior operational gaps: reproducible source snapshots/rulesets, resumable worker cursors, candidate-state store, and governance event/handoff domain.

Key confirmations

• SB-12 uses source snapshot + ruleset version to prevent stale or non-reproducible verdicts.
• SB-13 designs a type-generalized worker cursor family, correcting the uuid-vs-integer mismatch.
• SB-10 designs group-grain candidate state and avoids checked-forever booleans and per-row explosion.
• SB-11 reuses existing event substrate and respects register-before-emit; no new event bus.
• Doc 42 correctly keeps build NO-GO and carries dependency/gate order.
• No hardcoded current axes/object arrays were introduced.
• No local governance island was introduced.

Remaining concerns before build

1. Docs 24/25 still need at least cross-reference or consolidated build index so implementation agents cannot miss GCOS.
2. C-7 decision remains needed for input-trust/ruleset owner/backfill deadline/observer-trigger ruling.
3. External red-team should challenge GCOS end-to-end before any build-prep rehearsal.

Recommended next macro

Run a bundled safe macro:

• create docs 24/25 GCOS cross-reference or consolidated build index;
• produce C-7 decision packet;
• run GCOS end-to-end red-team/critique;
• prepare author-mode rehearsal prompts for SB-12/SB-13/SB-10/SB-11, but do not execute build.

No PG/Directus/Qdrant/Nuxt mutation, no schema, no DOT/event registration, no approval creation, no event emit, no implementation.