80 — SB-2 Rehearsal Readiness Verdict & Next Prompts

Doc: 80. Role: Readiness verdict for the SB-2 owner-line rehearsal bundle (docs 75–79) + next-step prompts. Status: SB-2 substrate = REHEARSED-GREEN; build NO-GO; W6 (SB-2-unrehearsed) CLOSED. Date: 2026-06-01.

---

80.1 What this rehearsal achieved

The GPT review (gpt-review-gcos-build-intake-pass-authorize-sb2-rehearsal-next-2026-06-01.md) named the immediate useful next step as closing W6 by running the SB-2 ownership-substrate author-mode BEGIN..ROLLBACK rehearsal, since SB-2 had not been rehearsed and is a prerequisite for the owner/apply line. That is now done:

Rehearsal	Object	Verdict	Doc
R1	entry baseline + Hard Gate 0	PASS (EXECUTION_MODE)	75
R2	governance_responsibility_scope	PASS	76
R3	governance_object_ownership (uniqueness, 4 roles, supersession, 5 neg tests)	PASS	77
R4	resolution view + gap/conflict/anti-hiding/no-inference/island	PASS	78
R5	cross-session entry==exit	PASS (all pre==post)	79

SB-2 substrate is now rehearsed-GREEN alongside the GCOS substrate (SB-10/11/12/13, docs 57–66). The doc-17 design executed faithfully against a live PG 16.13 engine with zero drift (unlike the GCOS rehearsals, which surfaced 5 surgical drifts F-57-1..F-R7-2): the SB-2 contract used real governance_registry codes and standard column types, so no representative-DDL placeholder bit. One design-fidelity decision is recorded (doc 76 §76.1): the mission's rollback/exception/delegated/supporting terms map to a ref-column + owner_kind roles, not to extra scopes — the law-defined scope set stays at six.

80.2 Build remains NO-GO — remaining gates (per docs 68/49; live-reverified)

Rehearsal-GREEN ≠ build-GO. SB-2 build/COMMIT is still blocked by:

Gate	State	Why still blocking
M-1 sovereign (os_proposal_approvals > 0)	0 ⇒ COMMIT_FORBIDDEN	The single COMMIT key. Only the sovereign writes os_proposal_approvals; silence ≠ approval. Re-verified live 0 (doc 79).
C-1 (SB-2 pattern)	ruled for rehearsal only (GPT delegated ruling)	The delegated ruling explicitly is NOT sovereign build approval, NOT an approval-spine record, NOT permission to COMMIT. A formal C-1 build intake is still required.
C-2 / SB-1 (action-type handlers)	not yet rehearsed	Writing the first owner row needs the assign_governance_owner / delegate_authority / assign_axis_owner handlers to exist + be ratified. SB-1 author-mode rehearsal has not run (doc 19 left it as a paste-ready script; only SB-2 was authorized/run this macro).
H-1 (human enact/approval path)	open	creating the table is a governed change.
H-2 / SB-6 (sovereign sign-off path)	open	tied to M-1.
OP-B / C-3 + C-4	open	IU owner-binding into this table additionally needs these (doc 17 §10).

No gate may be self-approved. The build needs new input beyond the delegated ruling (a sovereign M-1 write + C-1/C-2 build intake), exactly as doc 68 records.

80.3 Recommended next macros (parallel-safe / sequenced)

1. P1 — SB-1 APR action-type author-mode rehearsal (runnable now). The natural pair to this macro: rehearse the four C-2 action-type rows (assign_governance_owner, grant_governance_exception, delegate_authority, assign_axis_owner) fail-closed (handler_ref='unimplemented'), BEGIN..ROLLBACK, accounting for the apr_action_types birth/description/provenance triggers (doc 18 §1.2) and the fn_auto_approve_add bypass (governance APRs must use action ∈ {review,modify,delete}, never add). Script is paste-ready in doc 19 §2. Closes the last unrehearsed owner-line prerequisite. (NB: unlike SB-2, SB-1 inserts fire live triggers even under ROLLBACK — verify entry==exit carefully.)
2. P2 — GPT review of this SB-2 rehearsal bundle (docs 75–81) before any build intake.
3. P3 — C-1/C-2 formal build intake (recorded governed decision, not the delegated rehearsal ruling) → feeds the gated build.
4. P4 — gated SB-2 build only after: M-1 sovereign write + C-1/C-2 build intake + SB-1 ratified + H-1/H-2. Build order per doc 70; rollback/verification per doc 71; authorization template per doc 72. Never self-approved; per-step never-blanket.

80.4 Verdict

SB-2 owner-line rehearsal = PASS. W6 (SB-2-unrehearsed) CLOSED. SB-2 substrate rehearsed-GREEN. Build remains NO-GO (M-1 sovereign=0; C-1 ruled-for-rehearsal-only; SB-1 not yet rehearsed; H-1/H-2 open). Recommended next: P1 SB-1 rehearsal (runnable now) ∥ P2 GPT review → P3 C-1/C-2 build intake → P4 gated build.