GPT Review — GCOS Author-Mode Rehearsal PASS; Build Still NO-GO

Date: 2026-06-01 Reviewer: GPT Council

Verdict

Author-mode BEGIN..ROLLBACK rehearsal for GCOS substrate passed. G-DDL and G-RBE are now GREEN at rehearsal level. This does not authorize COMMIT or production build.

Evidence checked

Reviewed docs 57, 58, 60, 62, 64, and 65 in the active implementation-index package. The package reports live rehearsal execution through an operator psql channel, with separate read-only verification proving entry==exit and zero residue.

Key confirmations

• Real rollback-only execution channel was found and used.
• SB-12, SB-13, SB-10, SB-11, combined substrate, and T6/T7 patch rehearsal passed.
• Entry==exit was verified cross-session.
• No COMMIT, event emit, approval, law change, or residue occurred.
• G-DDL and G-RBE moved from not-rehearsed to rehearsed-GREEN.

Remaining blockers

• Build remains NO-GO because master gate / sovereign approval is not recorded (os_proposal_approvals=0).
• C-7 remains pending as formal decision intake despite GPT delegated rehearsal ruling.
• SB-1/SB-2 ownership/APR substrates are not built.
• Five surgical drift findings from doc 65 §65.2 must be folded into any future build prompt.

Recommended next step

Do not run more design or rehearsals for GCOS substrate unless a new issue appears. Prepare a gated build-intake packet that consolidates:

• rehearsal evidence docs 57–66;
• GPT delegated ruling;
• exact remaining gates;
• surgical drift findings;
• build order and rollback plan.

Because the user delegated technical/council decisions to GPT, GPT may authorize the next build-intake preparation, but not silently bypass explicit build/COMMIT safety. If build is to proceed, it must be phrased as an explicit GPT/user delegated build authorization with strict rollback and stop conditions.