Merge pull request 'docs(runbooks): the PR flow, not git push origin main' (#5) from docs/runbooks-pr-flow into main

Reviewed-on: #5

DECISIONS-LOG.md

@@ -4788,3 +4788,85 @@ accurate before the PR flow and are stale now. Correcting them is tracked, not d
 3. Land `feat/plex-claim-sops-secret` (PR #1) once the gate can actually run.
 4. Claim plex, after checking it is not already claimed.
 5. Correct the 37 runbooks' `git push origin main` wording.
+
+## 2026-09-29 — Plex is claimed; the CI/CD gate that "enforced" it never existed. **PM HANDOFF.**
+
+Began as "inject a plex.tv claim token". Ended by discovering the delivery pipeline was fiction,
+rebuilding it, and shipping the token through it. Plex is **claimed** — `PlexOnlineToken` is
+present in `/config` on the `plex-config` PVC, so the exchange is now a permanent no-op and the
+library scan is running over the 8.33T NFS share.
+
+### The finding: both halves of the 2026-08-31 CI claim were false
+
+That entry recorded "Gitea Actions CI is LIVE + enforcing … required status check; runner
+`incluster-dind` online". Measured against the live API on 2026-09-29:
+
+| Claimed | Measured |
+|---|---|
+| `main` protected, gate required | `branch_protections` → `[]`; `protected:false`, `enable_status_check:false`, `required_approvals:0`, `user_can_push:true` |
+| Runner online | **zero** runners at repo, org AND site level |
+
+**PR #1 was the first pull request this repository has ever had.** Its contexts sat `pending`
+for 30.6 minutes across 122 polls and never reported. For a month, every "the gate enforces this"
+statement rested on an assertion nobody had checked — the same fail-open class as 2026-09-18,
+and the reason it hid so long is that the log itself was the evidence.
+
+### Root cause of the dead runner
+
+`act_runner` registers **once** and persists its identity in `/data/.runner` on the
+`act-runner-data` PVC. Gitea no longer held a matching row, so the pod booted, saw `.runner`,
+**skipped registration**, and polled with an identity Gitea did not recognise. Symptom: zero
+runners, pod Running, nothing crashlooping, no error anyone reads. Deleting the PVC forced a
+genuine re-registration (`.runner is missing` → `Runner registered successfully`).
+
+It then did not come back for several minutes, because Flux could not recreate the PVC:
+`apps-wave-1` was blocked four levels deep on a **stale** `DependencyNotReady` for
+`platform-config`, which itself read `Ready=True`. Each wave re-evaluates only on its own
+`interval: 10m`, so a resource deleted at the bottom of the chain can take ~40 min to return.
+**Force it** with `flux reconcile kustomization apps-wave-1 --with-source` rather than waiting.
+
+### Corrections to things this log and the runbooks asserted
+
+- **A skipped Gitea job reports `success`, not pending.** Measured: `gate / conformance` returned
+  `success` / "Has been skipped". An earlier entry (#2) said requiring it would deadlock every PR.
+  Wrong — it would pass **vacuously**, forever, while nothing ran. Under HARD RULE 4 that is worse
+  than a deadlock, because a deadlock is loud. Never require it; require
+  `gate / gate (pull_request)` alone. Corrected in #3.
+- **`gate.yml`'s push trigger omits `feat/**`** (it lists `feature/** fix/** docs/** chore/**`).
+  With `act_runner` capacity 1, a branch prefix that IS in that list fires a second redundant run
+  which serialises ahead of the PR run and doubles wall-clock. Exploited deliberately in
+  `infra/plex/claim-ship.sh`; the honest fix is to align the trigger list.
+- **The "~4-minute TTL"** asserted in four places was **uncited**, and upstream `pms-docker`
+  documents no expiry at all. The authoritative reading is the countdown plex.tv/claim renders at
+  issue time. Removed from `runbooks/plex-claim.md`; the same claim still sits in
+  `catalog/plex.yaml` and the Secret's header comment (left alone — editing a `.sops.yaml`
+  comment risks the MAC, and touching `catalog/plex.yaml` re-renders a golden).
+
+### Measured, once the pipeline actually worked
+
+`gate / gate (pull_request)` 1m34s–1m58s. Full claim loop end to end **~2m45s** — comfortably
+inside the window, which retires the theory that a short-lived token cannot survive a PR flow.
+That theory was mine and it was wrong: the pipeline was never too slow, it simply did not exist.
+
+### State now
+
+- `main` **protected**, `user_can_push:false`. Runner `incluster-dind` online.
+- `CLAUDE.md` is the agent delivery contract; `infra/gitea/` holds the protection + runner scripts.
+- **All 37 runbooks** that instructed `git push origin main` now describe the PR flow — that
+  instruction had become actively blocked, not merely stale.
+- `infra/plex/claim-ship.sh` drives the claim loop end to end.
+
+### Next steps
+
+1. **`enable_status_check: true`** with `gate / gate (pull_request)` as the only context. The
+   prerequisite is met: the gate has been observed green on real PRs.
+2. Add `jakman85` as a repo **collaborator**, then `required_approvals: 1`. (Currently the only
+   org member is `gitea-admin`, which agents authenticate as — requiring approval before that is
+   fixed would leave nobody able to approve.)
+3. Run the **push probe** against protection: `gitea-admin` is a site admin and Gitea may let it
+   bypass. `user_can_push:false` is the API's opinion, not proof.
+4. Align `gate.yml`'s push trigger with this repo's `feat/**` prefix.
+5. Convert the `dind` container to a **native sidecar** with a `startupProbe`, per the standing
+   FOLLOW-UP note in `apps/wave-1/gitea-actions.yaml`. It deletes both hand-rolled wait loops and
+   the envsubst hazard. Land it ALONE — it is the merge gate for the whole repo.
+6. Create the Plex libraries over `/media/movies`, `/media/tv`, `/media/photos`.