BINKY-WP-0004 T04/T05 done, T06 blocked with cutover runbook

- T04: executor-worker MVP (new repo ~/executor-worker) ran one task
  end-to-end: kaizen schedule-prepare persona, agentic llm-connect
  session, sandbox commit e043f21, hub progress event
- T05: recurring mailbox scan fully wired (two-phase: deterministic
  credentialed scan + LLM triage session with suspicious-mail log-only
  rule); email checklist item 9 now gated only on Lane 3 AppRole
- T06: blocked — gates are DEC-2026-002, Red-lane Lanes 2/3, Railiance
  deploy, 3 verified runs; runbook at
  integrations/executor-cutover-runbook.md

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

integrations/executor-cutover-runbook.md

@@ -0,0 +1,52 @@
+# Executor Cutover Runbook (BINKY-WP-0004-T06)
+
+> Status: prepared 2026-07-17 — execution blocked until the gates below
+> clear. Owner of the go decision: founder (Blue lane with founder
+> notification at cutover).
+
+## Gates (in order)
+
+1. **DEC-2026-002 resolved** (DecisionQueue.md) — executor worker home.
+2. **Lane 2 + Lane 3 Red-lane provisioning** done
+   (`integrations/executor-worker-secrets.md`): forgejo deploy key
+   (sandbox repo first, binky-control at cutover) and AppRole
+   `executor-worker-binky-mail`.
+3. **Worker deployed on Railiance** (repo `~/executor-worker` prototype;
+   deployment per activity-core's Railiance conventions) and one sandbox
+   task executed there end-to-end (same smoke as the 2026-07-17
+   workstation run, sandbox commit e043f21).
+
+## Cutover steps
+
+1. In activity-core, flip to `enabled: true` (its governance — commit in
+   that repo): `binky-daily-rhythm`, `binky-weekly-mail-intake`,
+   `binky-weekly-review-prep`. The `binky_rhythm_status` resolver is live
+   (activity-core b1eb5e6).
+2. Wire emitted tasks to the worker (issue-core sink poll or
+   TaskExecutorWorkflow — per DEC-2026-002 outcome).
+3. **Verification: three clean scheduled executions** (e.g. Thu daily,
+   Fri daily + review-prep, Mon daily + mail-intake ≈ 3 business days).
+   Clean = task emitted on schedule, worker committed, hub completion
+   event present (`binky_daily_brief` / `binky_mail_intake` /
+   `binky_weekly_review` with detail.repo=binky-control), no duplicate
+   briefs (resolver guard working).
+4. Remove the workstation crontab line
+   (`crontab -l | grep -v 'binky rhythm bridge' | crontab -`) and mark
+   the bridge section in OperatingRhythm.md **retired** with the date.
+5. Notify founder (daily brief "Progress" + this file updated to done).
+
+## Rollback
+
+Re-add the cron line from OperatingRhythm.md's bridge section and set the
+three definitions back to `enabled: false`. The bridge script stays in
+`scripts/rhythm-session.sh` untouched until one full month of clean
+executor operation.
+
+## Interim state (until gates clear)
+
+The workstation cron bridge remains the active daily-rhythm executor
+(installed 2026-07-16, `23 8 * * 1-5`). The executor completion events
+double as the bridge's future idempotence guard, so both may coexist
+briefly during verification without duplicate-brief risk only if the
+bridge is paused on days the executor is being verified — pause the
+bridge (comment the cron line) during step 3.