feat(610): split the decision corpus into one YAML-frontmatter file per record

168 records -> docs/decisions/records/<area>/<topic>.md (163 active, 23 dirs) and docs/decisions/archive/<area>/<topic>.md (5 archived). The filename IS the key, so one-active-record-per-key becomes a filesystem property rather than a validator check, and supersession becomes a `git mv`. WHY: the monolith was a concurrency problem before an aesthetic one. A 3,900-line append target made parallel sessions collide -- PR #605 and PR #614 both hit append-vs-append conflicts during routine rebases, and hand-resolving those inside the corpus is exactly the operation the rationale-rewrite guard exists to police. HOW IT IS VERIFIED: a ~170-file diff cannot be meaningfully read, so correctness does not rest on reading it. The parser was taught BOTH formats first, so the body-diff guard parses the old form at the merge-base and the new form at head -- the migration validates itself, no bypass. The proof is a field-level equivalence harness: 168 records before and after, zero lost, zero gained, zero field mismatches, zero rationale bodies differing. Reviewers should scrutinise the harness; it is the actual evidence. What measuring caught that reading would not have: - ~500 lines sit OUTSIDE any record -- decisions.md's lifecycle schema and each topic file's preamble, mostly the only copy. Source files are kept and stripped, never deleted. They also cannot be filed per-area: topic files hold several areas and 4 of 23 areas span several files. - Archive discovery was a non-recursive glob; after the split it found ZERO archived records, surfacing as four bogus "supersedes points to unknown key" errors rather than an obvious failure. - ~32 live docs point into the corpus BY DATE, which the split dangles. Each stripped file now ends with a generated "Records formerly in this file" index, which also rescues the identical breadcrumbs in old issue comments. - decisions.md's "In this file:" list was 97 same-file anchor bullets that the split makes WRONG, not merely stale. Dropped; the generated index replaces them with links that resolve. The equivalence harness now runs against a checked-in FIXTURE, not the live corpus. The earlier version migrated the real tree, which made it a one-shot: the moment the migration landed there was nothing left to move and the tests failed for reasons unrelated to the code. A fixture keeps them testing the SCRIPT rather than the repo's current state. Keys preserved verbatim, warts included: `sched` (12) and `scheduling` (1) remain two directories for one concept. Renaming a key is not a move -- it changes identity, breaks the equivalence proof, and invalidates MemPalace's per-key drawers. Taxonomy normalisation is separate work. refs #610
2026-07-25 19:45:09 +02:00
parent 8578dc1ca7
commit fba5233caf
190 changed files with 7193 additions and 5987 deletions
@@ -0,0 +1,23 @@
+---
+key: spa.playback-troubleshoot-poll
+title: '2026-07-09 — Playback-troubleshooting completion feedback: poll status, no push channel'
+status: active
+since: '2026-07-09'
+supersedes: none
+superseded-by: none
+rule: The playback-troubleshooting screen reports FFmpeg completion by polling `GET /api/troubleshoot/playback/status` (~2s) rather than a server push channel.
+signals: '`PlaybackTroubleshootingScreen.tsx`, `ICourier`/`ISnackbar` parity · paths: `web/src/screens/PlaybackTroubleshootingScreen.tsx` · issues: #145'
+mechanics: '`GET /api/troubleshoot/playback/status`'
+---
+
+The SPA playback-troubleshooting screen (`PlaybackTroubleshootingScreen.tsx`, #145) reports FFmpeg
+completion by **polling `GET /api/troubleshoot/playback/status` every ~2s** while a session is
+running (plus one poll on mount so a session started elsewhere still gates Play), rather than a
+server push. The status endpoint returns `{ state, exitCode, speed, logs }`; the screen captures the
+running→completed/failed transition in local component state and surfaces a completion notice
+(success on exit 0, warning otherwise) — the SPA equivalent of the Blazor page's MediatR
+`ICourier`/`ISnackbar` `PlaybackTroubleshootingCompletedNotification`. Chosen over SignalR/SSE
+because the SPA has **no push channel** and troubleshooting sessions are short and user-initiated, so
+a lightweight poll (started on Play, stopped on settle/unmount) is simpler than standing up a new
+real-time transport. Speed thresholds and the "(Speed: Nx)" badge colors are copied verbatim from the
+Blazor `GetSpeedClass` (red <0.9, green >1.1, amber otherwise).