85 — Cross-Rehearsal Evidence Review: SB-1 / SB-2 / GCOS / T6-T7

Branch C (mission §6). Tier: consolidation of executed-live rehearsal evidence across the package. Mutation footprint: ZERO (review only). Sources: GCOS docs 57–66, build-intake docs 67–74, SB-2 docs 75–81, SB-1 docs 83–84 (this mission). All rehearsals were BEGIN..ROLLBACK, entry==exit, zero COMMIT. One-line: every substrate track is REHEARSED-GREEN or design-complete; every track is BUILD NO-GO. The sole blockers are governance/authorization (M-1 sovereign, C-7/C-1/C-2 formal intake), not engineering — plus mandatory drift fold-ins (doc 86).

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85.1 Per-track evidence matrix

Track	Rehearsal status	Evidence doc(s)	Objects rehearsed	Negative tests	Entry==exit	Build-ready subject to auth?	Still blocked by
SB-1 APR vocabulary	REHEARSED-GREEN (live, this mission)	83, 84	INSERT 4 apr_action_types rows (high/unimplemented) + birth-trigger fix in-txn	N1 PK-collision, N2 bad-risk, N3 bad-status — all rejected	✔ 6→6, two channels, DDL reversed	yes (vocab) — after F-83-1 fix	M-1; C-2 build record; Phase-B handler (G-APPLY)
SB-2 owner substrate	REHEARSED-GREEN (live, R1–R5)	75–81	2 tables (governance_responsibility_scope, governance_object_ownership 20-col) + 2 views (v_object_effective_owner, v_object_owner_gap); trigger-less	5 neg (dup-accountable, phantom-owner FK, bad-scope FK, bad-kind CHECK, delegated-no-TTL CHECK) + bad-owner — all PASS; 8 resolution demos D1–D8	✔ cross-session (doc 79)	yes	M-1; C-1 build record; H-1/H-2/SB-6; OP-B/C-3/C-4 (IU owner binding)
SB-12 ruleset/snapshot	REHEARSED-GREEN	58, 62, 67	CREATE TABLE governance_ruleset (PK ruleset_version) + reuse evolution_snapshots (gov row)	constraint-respect (ruleset created draft, never activated)	✔ dual-session	yes (G-DDL met)	M-1; A-4 (C-7.2 ruleset-owner) before activation
SB-13 worker cursor	REHEARSED-GREEN	59, 62	CREATE TABLE gov_worker_cursor (text watermark, 5 worker rows) + reuse queue_heartbeat	int-watermark & uuid-watermark coexist in one text col (RR-8)	✔	yes (G-DDL met)	M-1; F-57-1 fold-in mandatory
SB-10 candidate state (GCOS keystone)	REHEARSED-GREEN	60, 62	governance_candidate_state (group grain) + governance_candidate_object (optional) + candidate_scan_run; real FK → governance_ruleset	no-checked-forever grep = 0 rows (RR-4); group-grain Δrows=0	✔ all 3 tables NULL post	yes (G-DDL met)	M-1; needs SB-12+SB-13 committed first (FK)
SB-11 event/handoff	REHEARSED-GREEN	61, 62	0 new tables — register 5 governance-domain rows in event_type_registry active=false; reuse event_outbox	zero emit asserted; 0 rows ever active=true (RR-9); 0 new tables (RR-10)	✔ etr 40→45→40, outbox unchanged	yes (G-RBE met)	M-1; F-57-2/3/4 fold-in; active=true flip = separate T7 gate; A-3 (C-7.1) for input-trust
T6/T7 addenda	REHEARSED-GREEN (Part A rows; Part B diff-only)	63, 69	INSERT 4 dot_domains + 4 GCOS DOTs (dot_tools, tier-A read/propose) + 4 dot_coverage_required; mutating apply DOT NOT created	first attempt FK-failed → forced order (F-R7-1); Birth-Gate format WARN ×4 (F-R7-2); erroring tx → 0 residue	✔ all counts at entry	addenda enumerated/rehearsed	M-1; SB-10/11/12/13 built first; C-7; gate table; F-R7-1/2 fold-in; docs 24/25 not written
GCOS backfill / handoff / input / candidate	design-complete + substrate rehearsed	31–35, 58–62	backfill SEED, handoff cursor-tail (Option A, Birth untouched), input L0 gate, dirty-group candidate scan	covered by SB-10..13 rehearsals	✔ (via substrate)	design-ready	M-1; C-7 (input-trust, backfill-ruleset, 60-day cutover, observer-trigger) formal intake
Issue / event / notification (T7)	design-complete; event-register rehearsed (SB-11)	24, 61	20 issue types ride system_issues; governance event domain register-before-emit	zero emit (SB-11)	✔	design-ready; register step rehearsed	M-1; doc 24 not surgically written; F-57-2/3/4
Production gate (G-PROD)	design rule (addendum #10)	35 §3, 45, 49	fail-closed: stale/missing candidate verdict → high-risk write blocked	n/a (rule)	n/a	enforced at build	applies at build; no standalone rehearsal needed

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85.2 Consolidated entry==exit ledger (every executing rehearsal left zero residue)

• SB-1 (doc 83/91): apr_action_types 6→6; SB-1 codes absent; birth_registry.apr_action_types 0→0; birth trigger restored to no-arg; approval_requests 211/apr_approvals 42 unchanged; os_proposal_approvals 0; idle_in_txn 0.
• SB-2 (doc 79): 4 targets NULL→NULL; governance_relations 8/8, governance_registry 9/9, apr_action_types 6/6, os_proposal_approvals 0/0, event_type_registry 40/40 (gov 0); idle_in_txn 0; sessions-left 0.
• GCOS (doc 64): all 5 GCOS tables NULL post; evolution_snapshots 1, queue_heartbeat 3, event_type_registry 40, event_outbox (unchanged), normative_registry 47, law_catalog 5 — every value at entry.
• T6/T7 (doc 63): dot_domains 46, dot_tools 309, dot_coverage_required 11, gov DOTs 0, GCOS domains 0, governance events active 0 — at entry.

No rehearsal across the package ever produced an os_proposal_approvals row, a committed object, an emitted event, a registered DOT/event, or a law change.

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85.3 Cross-rehearsal verdict

Substrate engineering is proven. SB-1 (vocabulary), SB-2 (owner line), and the four GCOS blockers (SB-10/11/12/13) are each rehearsed-green with negative tests and entry==exit; the T6/T7 addenda are enumerated and their additive rows rehearsed (the mutating apply DOT deliberately never created). The only things between here and a build are governance decisions and the sovereign approval — none of which an agent or a GPT delegated ruling can supply (doc 88). Five GCOS drift findings + the new SB-1 F-83-1 + the F-83-2 observation are mandatory engineering fold-ins (doc 86). Cross-rehearsal status: REHEARSED-GREEN / BUILD NO-GO.