timothyandClaude Opus 4.8
94ebf34ccd
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Adds the shared optimistic-concurrency contract so a stale second tab can no longer silently overwrite a fresher edit. PR1 lands the infra + the Block reference aggregate; PRs 2–4 fan the same recipe across the other 8 roots (design: #253#issuecomment-8472). Contract - `IVersionedAggregate` (`int Version`) on all 9 replace-all roots (ProgramSchedule, Block, Template, DecoTemplate, Playlist, Collection, Playout, MultiCollection, RerunCollection), EF-mapped `.IsConcurrencyToken()`; one dual-provider migration `AddAggregateVersions` (nullable:false, default 0). - Strong `ETag` of `Version` on the aggregate GET; `If-Match` on the PUT; mismatch → 412 (distinct from the §3a 409 build-lock guard). Successful PUT returns the new ETag. - `PreconditionFailedError : BaseError` → 412 in `ApiResults.ToErrorResult`; `ConcurrencyHeaders.ParseIfMatch/SetETag`; malformed If-Match → 400; `*`/absent = Phase-1 force-write. Block reference wiring - Handler: standalone `Either` via `CheckVersion` AFTER validation (never through `Apply`, which Join()-flattens the subtype to 422), unconditional `Version++`, `SaveChangesWithConcurrencyGuard` backstop (DbUpdateConcurrencyException → 412). - `BlockViewModel.Version` (header-only, not echoed in the body); controller sets the ETag on GET items and on the successful PUT. - SPA: `client.requestWithMeta` seam; `blocks.getBlockItemsWithMeta` + `replaceBlock` If-Match/ETag round-trip; `BlockEditor` holds the ETag, sends If-Match, and on 412 opens a blocking "changed elsewhere — reload" dialog. Tests - Handler contract tests: stale-If-Match → 412 (no mutation), matching/absent → success + bump, no-op save still bumps, and a two-context racing save → 412; proven non-vacuous (drop `.IsConcurrencyToken()` → the race test fails). - Controller tests: malformed If-Match → 400, If-Match threaded to the command, ETag on GET/PUT, 412 passthrough. SPA: requestWithMeta ETag, replaceBlock If-Match, 412 dialog. Docs: api-conventions §7a, spa-conventions §4a, domain-model glossary, decisions log. Refs #253 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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:
CLAUDE.md(repo root) — project intro: architecture, layout, dev commands, conventions.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.docs/domain-model.md— what the app IS: entity glossary, channel→playout→schedule/block concept map, where each concept is edited in the SPA.docs/api-conventions.md— checklist for adding/changing a/api/*endpoint (controllers, DTOs, error mapping, auth, OpenAPI regen, tests).docs/spa-conventions.md— playbook for adding a screen to the ChicoryTV React SPA.docs/e2e-local.md(+scripts/e2e-local.sh) — how to run a live local instance for manual or Playwright-MCP verification.docs/testing.md— testing map: what each*.Testsproject /websuite covers, golden-file nets, the timezone-independence rule, how to run subsets, the per-PR verification gate.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).docs/decisions.md— append-only "why" log. Check here before challenging an existing convention.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 bydocs/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 byscripts/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).