ersatztv/CLAUDE.md

ErsatzTV Fork

Custom IPTV channel server for Jellyfin. Forked from ErsatzTV/ErsatzTV after upstream archival (Feb 2026, v26.3.0). Our fork lives on Gitea.

Architecture

• Language: C# / .NET 10, Blazor Server UI (MudBlazor)
• Pattern: CQRS via MediatR — queries/commands in ErsatzTV.Application/
• Database: EF Core (SQLite default, MySQL optional) — context in ErsatzTV.Infrastructure/Data/TvContext.cs
• Media: FFmpeg via CliWrap, SkiaSharp for logo generation
• Functional C#: Language Ext (Option, Either monads throughout)

Project Layout

Project	Role
ErsatzTV/	ASP.NET Core host, Blazor pages, API controllers, DI setup
ErsatzTV.Application/	MediatR handlers (business logic)
ErsatzTV.Core/	Domain entities, interfaces, no infrastructure deps
ErsatzTV.Infrastructure/	EF Core repos, data access
ErsatzTV.Infrastructure.Sqlite/	SQLite-specific implementations
ErsatzTV.FFmpeg/	FFmpeg process wrapper
ErsatzTV.Scanner/	Media library scanning

Key Files

• M3U generation: ErsatzTV.Core/Iptv/ChannelPlaylist.cs → ToM3U()
• XMLTV generation: ErsatzTV.Application/Channels/Queries/GetChannelGuideHandler.cs
• IPTV controller: ErsatzTV/Controllers/IptvController.cs — /iptv/* routes
• Logo generation: ErsatzTV.Core/Images/ChannelLogoGenerator.cs
• Channel entities: ErsatzTV.Core/Domain/Channel.cs
• DB context: ErsatzTV.Infrastructure/Data/TvContext.cs

Deployment

• Docker host: jazz (192.168.1.99), container ersatztv, port 8409
• Config volume: ~/downloadswarm/ersatztv/ on jazz → /config in container
• SQLite DB: /config/ersatztv.sqlite3 (WAL mode, root-owned)
• Images (our fork, built by .gitea/workflows/docker-build.yml → 192.168.1.95:3000/timothy/ersatztv): push to main → :latest + :<sha> (test image); push v* tag → :prod + :<version> + :<sha>. Cutover done (2026-06-27, server-management#481/#482): prod container runs fork :prod (currently v26.3.1), test container tracks :latest; prod advances only when a new v* tag is pushed (next: v26.4.0, first app-change release). Pipeline details: docs/ci-cd.md.

Development

# Build
dotnet build ErsatzTV.sln

# Run locally (needs FFmpeg in PATH)
dotnet run --project ErsatzTV

# Docker build
docker build -f docker/Dockerfile -t ersatztv:dev .

Conventions

• Read docs/contributing.md before non-trivial changes — it documents the established patterns (layering, CQRS handlers, LanguageExt, Blazor/MudBlazor, EF Core + dual-provider migrations, the FFmpeg pipeline, analyzers, testing) and the deviation policy: match the established style; diverge only with a concrete, stated reason.
• Follow existing MediatR CQRS pattern for new features
• Domain logic in ErsatzTV.Core, infrastructure in ErsatzTV.Infrastructure
• Keep Blazor pages thin — delegate to MediatR handlers
• Test with NUnit + Shouldly + NSubstitute (the existing *.Tests projects); xUnit is not used here
• Dependencies use Central Package Management: versions live in the repo-root Directory.Packages.props; csproj reference packages by name only. Add/upgrade by editing the central <PackageVersion> — never put Version= back on a <PackageReference> (trips NU1008). See docs/ci-cd.md → Dependency management.
• DB migrations target BOTH providers: a TvContext model change needs a migration in ErsatzTV.Infrastructure.Sqlite and ErsatzTV.Infrastructure.MySql — run scripts/add-migration.sh <Name> (does both). CI's migrations job enforces model-drift + apply-to-fresh-DB per provider. See docs/ci-cd.md → Migration integrity.
• Renovate is live (.gitea/workflows/renovate.yml, weekly + workflow_dispatch): opens dependency-update + OSV vuln-fix PRs and a Dependency Dashboard issue; patch bumps to test/dev-only packages auto-merge once Build & test passes, the rest are manual. Cross-repo rollout: server-management#484. See docs/ci-cd.md → Dependency management.
• Versioning: release tags are vYY.<release-seq>.<patch> (year · sequential release-within-year · patch) — inherited from upstream, not year.month. v26.3.1 = our infra rebuild of upstream 26.3.0 (no app changes); v26.4.0 is reserved for the first release with app changes. Never [skip ci] a commit you'll tag (it suppresses the release build). Full policy: docs/ci-cd.md → Versioning & releases.
• Backlog tracked via Gitea Issues

Task Completion Protocol

Every task that closes a Gitea issue MUST complete ALL of these before it is considered done. Use /done <issue> to run through this automatically.

1. Root cause (bug fixes / incidents only): Document WHY the problem existed, not just what was changed. If root cause is unknown, say so explicitly and open a follow-up investigation issue. Fixing symptoms without understanding causes creates recurring problems.
2. Comment on issues as you work — what you found, what approach you're taking, any deviations from the suggested fix.
3. Push changes: git push all commits before closing. Use fixes #N in commit messages to auto-close where appropriate.
4. Close comment: Add a structured closing comment on the issue covering: what was done, root cause (if applicable), files changed, anything deferred, follow-up issues created, and which docs were updated.
5. Close the issue via API or fixes #N commit. Leave open with a comment only if partially addressed.
6. Update docs: If the change affects operational behavior, update the relevant Obsidian docs (~/homelab-docs/), MEMORY.md, or CLAUDE.md inline — not as a follow-up.
7. Reply to reviewer (if from adversarial review): Summary of done/deferred/questions. This triggers the next review cycle.

Project Boundaries

ersatztv OWNS: ErsatzTV fork code (C#/.NET), channel/collection/schedule management, M3U/XMLTV generation, the ErsatzTV skill in server-management.

ersatztv does NOT own:

• Docker compose configs → server-management (~/downloadswarm/stacks/ersatztv/)
• NFS mounts, Ansible, DNS, networking → server-management
• Content sourcing (yt-dlp downloads, Sonarr/Radarr libraries) → media-management (planned)
• Jellyfin skill → server-management (symlinked)

For infrastructure changes (Docker, NFS, ports, Authelia): open an issue in timothy/server-management.

For content/media sourcing questions (what goes into channels, yt-dlp pipelines): open an issue in timothy/media-management once it exists; for now, timothy/server-management.

For plan/audit reviews: open ~/adversarial-reviewer before significant architecture changes.

Full cross-project rules: ~/homelab-docs/Operations/Project Boundaries.md (https://docs.tblindustries.be). ErsatzTV docs: ~/homelab-docs/Docker/ErsatzTV.md + project-local docs/ (fork strategy, channels, M3U/XMLTV).