## Summary
Reviewed the immutable stage-23 planning revision. The three sole prior blockers are closed: review-space dispatch is now address-pair first-match with terminal wrong-user rejection and configuration disjointness; scheduled-delivery cutover is tombstone-first and fence-gated; and every required verification command names its working directory and interpreter.

## Claims
- Artifact receipt is recorded in `index.jsonl` as stage `revision`, stage 23, SHA-256 `c7cb2bbc138ed4c52304454974d2ea5d60e4e1ddccf6c9d57c1bbc932a50cb79`.
- Stage-23 Revision 23 defines the required first-match review-space invariant, durable tombstone-first/fence cutover, and self-contained commands.

## Analysis
### Spec compliance
Revision 23 closes the ingress ambiguity left by the prior wording. It defines the review space as `(chat_id, topic_id)`, requires it be disjoint from customer, trainer, schedule, and generic-reserved spaces, resolves that pair before any user identity decision, sends only the exact configured review user to `AdaptiveOperatorService`, and terminally rejects every other user. The explicit every-update-kind / zero-downstream-counter test requirement prevents a wrong user in the review pair from falling through to generic/model/media/provider or another route.

Revision 23 corrects the schedule ordering defect by making the old-format immutable claim tombstone durable before the new ledger prepared row, including directory fsync. It identifies both asymmetric crash states and makes each fail closed: tombstone-only is `recovery_required`; ledger-only prevents scheduler startup. A durable cutover fence is written before migration; `preparing` and `recovery_required` prohibit sends for both the new startup path and compatibility wrapper, while `ready` is required before scheduling. The stop/deploy/fence/migrate/reconcile/ready/enable order and recovery-only downgrade rule preserve the no-resend boundary.

The verification commands are executable without inherited working-directory assumptions: all profile commands name the profile workspace and `.venv/bin/python`; all gateway commands name the gateway root and `.venv/bin/python`; the focused profile docs/preflight command does likewise.

### Architecture / antithesis
The strongest remaining concern would be that address-space-first routing may over-reserve a shared chat/topic and suppress a legitimate non-adaptive route, or that tombstone-first can leave a conservative unsent task blocked after a crash. Both are intentional safety tradeoffs and are bounded: configuration disjointness prevents a legitimate overlapping route, and recovery-required requires explicit reconciliation instead of inferring unsent or risking a duplicate provider send. This is the correct failure mode for Gate-D delivery safety.

## Root Cause
Prior revisions left (1) the wrong-user decision potentially after route selection, (2) an unsafe prepared-ledger-before-tombstone window and an insufficient startup-state gate, and (3) commands reliant on unstated current directories. Revision 23 specifies the required ordering and fail-closed boundaries directly.

## Findings
No findings. No CRITICAL, HIGH, MEDIUM, or LOW issue remains in the planning scope.

## Recommendations
Proceed to execution using the stated invariants and named crash/all-ingress tests. Treat this approval as plan-only; it does not certify implementation or live Gate-D execution.

## Architectural Status
CLEAR

## Code Review Recommendation
APPROVE

## Tradeoffs
- Address-pair reservation: rejects any non-review user in the review pair rather than allowing fallback; this prevents route confusion and downstream invocation.
- Tombstone-first/fence-gated migration: may conservatively pause/reconcile after a crash rather than assume unsent; this prevents duplicate scheduled delivery.
- Absolute cwd/interpreter commands: less portable than ambient commands, but reproducible in the declared deployment layout.