Files
Magnus Hedemarkandfactory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com> 2140d0d58d docs(jellyfin): thicken media-server skill against current API research
Full lastfm-model rebuild of the jellyfin skill against the 12.0-era
OpenAPI spec, core-dev authorization guidance, and server source:

- Document the researched auth sequence end to end: complete pre-token
  Authorization: MediaBrowser Client/Device/DeviceId/Version header
  required by POST /Users/AuthenticateByName (400 "Error processing
  request." without it), AccessToken returned, then Token= on the same
  header (legacy X-Emby-Token deprecated, disableable since 10.11,
  targeted for removal at 12.0).
- Extend scripts/jellyfin: new `login` subcommand demonstrating the
  pre-token header and printing session exports (password via
  stdin/prompt/env only), seasons/episodes TV navigation, next-up
  --series-id, browse --user-id (userId is required on non-API-key
  auth per the ItemsController guard), modern Token= header transport
  with X-Emby-Token fallback, 503 Retry-After handling, search
  Id/deprecated-ItemId fallback.
- Add 5 cited reference files (auth/sessions, endpoint catalog,
  user-scoping matrix, gotchas field guide, worked recipes) plus
  quick-connect; all cite api.jellyfin.org and live-verified sources.
- Upgrade relocated scripts/test_jellyfin_cli.py to the double-runner
  standard: 24 tests (was 8) covering help, argument errors, dry-run,
  mocked login header sequence, TV navigation, search-id fallback, and
  jq-executed pipeline-consumability chains; zero egress proven via
  proxy-trap rerun.
- Add evals/evals.json (6 cases incl. emby-install-not-for-jellyfin
  negative probe); rewrite SKILL.md (224 lines) and README; sync root
  README blurb and skill-triggers row; regenerate marketplace.json and
  llms.txt (description-embedding artifacts).

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
2026-08-29 17:37:35 -04:00

3.1 KiB

Jellyfin Media Server from the Terminal

Query your Jellyfin media library — recently added movies and episodes, search and inspect items, walk series, seasons, and episodes, browse library contents, see next-up episodes, log in as a user, and check server stats.

Why Install This Skill

When your agent loads this skill, it can navigate your home media server without opening a browser. That means:

  • See what's new — recently added movies and TV episodes, filtered server-side
  • Search your library — find any movie, show, or episode by keyword
  • Navigate series — walk a show's seasons and episodes, and see what's next unwatched
  • Browse collections — list your libraries and page through everything in them
  • Authenticate properly — log in as a user (or use Quick Connect) without fumbling Jellyfin's unusual MediaBrowser authorization header, which trips up most scripts
  • Check server details — server name, version, operating system, user count, counts

Every command is read-only (plus a login helper), and --dry-run previews any request without touching the network.

What You Get

Path Purpose
SKILL.md Complete command reference with setup, gotchas, and recipes
scripts/jellyfin CLI for Jellyfin API operations (--json, --dry-run)
scripts/test_jellyfin_cli.py Offline test suite (all HTTP mocked)
references/auth-and-sessions.md The MediaBrowser header scheme, login flow, token channels, deprecation timeline
references/endpoint-catalog.md Endpoint-by-endpoint parameter and response-shape catalog
references/user-scoping-and-errors.md Which calls need a user id, and why queries 400/404 without one
references/gotchas-field-guide.md Wire-level failure signatures and version differences
references/worked-recipes.md Multi-step curl/jq and CLI workflows
references/quick-connect.md Passwordless Quick Connect login
evals/evals.json Behavioral eval cases including negative triggers

Quick Start

scripts/jellyfin --help
export JELLYFIN_URL="http://your-server:8096"
export JELLYFIN_API_KEY="your-api-key"           # Dashboard → API Keys
export JELLYFIN_USER_ID="your-jellyfin-user-id"  # required by user-scoped commands
scripts/jellyfin search --query "dune" --type Movie --json
scripts/jellyfin recent --movies --limit 5

No API key yet? Log in as a user instead — the script sends the pre-token Authorization: MediaBrowser Client=..., Device=..., DeviceId=..., Version=... header that POST /Users/AuthenticateByName requires and prints the values to export:

scripts/jellyfin login --username alice --prompt

Triggers

Load this when asking about Jellyfin, media server content, recently added movies or TV, next-up episodes, browsing your home media library, or Jellyfin API authentication.

Requirements

Python 3.8+ with requests. A running Jellyfin server (10.8+ behaviors assumed). Authentication: an API key (Dashboard → API Keys), a user access token via login, or Quick Connect. User-scoped commands also need a Jellyfin user id.