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ersatztv/docs
timothyandClaude Opus 4.8 c40ffefa99
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feat(253): PR3 optimistic-concurrency fan-out — Diff + Scalar aggregates
Fans the frozen Block recipe (api-conventions §7a) across the five Diff/Scalar
replace-all endpoints, completing the #253 PR2→PR4 arc's implementable core:

- #6 Collection custom-order, #7 Playout alternate-schedules, #8 Playout templates
  (shared Playout.Version), #9 MultiCollection, #10 RerunCollection — each: pre-check
  412 as a standalone Either after validation (H2, subtype survives the Join flatten),
  unconditional Version++ (M1), guarded save, controller If-Match/ETag/400/412, SPA
  editor ETag round-trip + 412 conflict dialog.
- H1: the two Playout handlers' catch(Exception)→422 restructured so the guard's
  PreconditionFailedError returns before the catch (412, not 422).
- M2: RerunCollection/Collection refresh runs unconditionally on save; MultiCollection
  keeps its name-only→no-rebuild optimization by bumping on the first (name) save.
- H3: UpdateDefaultDecoHandler bulk-bumps Playout.Version via .SetProperty.
- Shared ConcurrencyHeaders.MalformedIfMatchProblem() for the 400 guard.
- Deferred (→ #269): same-root non-bulk sibling config writers' ETag rotation.

Tests: per-handler pre-check/bump concurrency tests (Playout ×2 incl. non-vacuous
racing-save backstop, Rerun, Multi incl. name-only-no-rebuild M2, Collection);
controller tests get a DefaultHttpContext for the header read/write. Docs:
api-conventions §7a fan-out status, spa-conventions §4a list-editor note, decisions.

Refs #253

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-11 19:23:48 +02:00
..

docs/ — reading order

Purpose: index of docs/ so a fresh contributor/agent knows what to read and in what order. Update this doc in the same PR that adds, removes, or retitles a doc below.

Read in this order at session start:

  1. CLAUDE.md (repo root) — project intro: architecture, layout, dev commands, conventions.
  2. docs/contributing.md — established code patterns (CQRS/MediatR, LanguageExt, Blazor/ MudBlazor, EF Core dual-provider migrations, FFmpeg pipeline, analyzers, testing). Read before any non-trivial change.
  3. docs/domain-model.md — what the app IS: entity glossary, channel→playout→schedule/block concept map, where each concept is edited in the SPA.
  4. docs/api-conventions.md — checklist for adding/changing a /api/* endpoint (controllers, DTOs, error mapping, auth, OpenAPI regen, tests).
  5. docs/spa-conventions.md — playbook for adding a screen to the ChicoryTV React SPA.
  6. docs/e2e-local.md (+ scripts/e2e-local.sh) — how to run a live local instance for manual or Playwright-MCP verification.
  7. docs/testing.md — testing map: what each *.Tests project / web suite covers, golden-file nets, the timezone-independence rule, how to run subsets, the per-PR verification gate.
  8. docs/blazor-route-parity.md — the #91 phase (b) tracker: which Blazor routes are redirected, SPA-ready-but-not-redirected, or still Blazor-only (and which issue blocks each).
  9. docs/decisions.md — append-only "why" log. Check here before challenging an existing convention.
  10. docs/ci-cd.md — build/test/release pipeline, versioning, dependency management.

Also present in docs/:

  • docs/rest-api.md — REST API design doc for ersatztv#2 (goals, conventions, per-slice plan). Largely superseded day-to-day by docs/api-conventions.md; read this for the original rationale.
  • docs/channels.md — Channel entity field reference.
  • docs/m3u-xmltv.md — M3U/XMLTV generation overview (ChannelPlaylist, GetChannelGuideHandler).
  • docs/fork-strategy.md — divergence policy vs upstream ErsatzTV.
  • docs/design-sync.md — Claude Design ↔ repo screen workflow (#92).
  • docs/endpoint-index.md — generated REST endpoint index (method/path/operationId/summary per OpenAPI tag). Do not edit by hand; regenerated by scripts/generate-endpoint-index.py / scripts/update-openapi.sh.
  • docs/handoffs/chicorytv-issue-queue.md — static session kickoff prompt + workflow lore. Queue state (goal, arc, what's in flight/next) lives in the pinned Gitea tracker ersatztv#237 — read that, not this file, for current state (protocol: decisions.md 2026-07-11).
  • docs/handoffs/rest-api.md — original handoff prompt for kicking off the REST API work (#2).