cast_dl_params feeds ctx.params to dl() and dl.result() as on the CLI. A string lang value now returns 400 instead of splitting into letters, and -r accepts HDR10+.
POST/DELETE /api/dashboard/drain refuses new sessions and jobs (SERVER_DRAINING, 409) and warns open sessions. A CDN can replace a 5xx body, so server errors are now 422, retryable ones and the tunnel check 424, and a new middleware turns any 5xx into 422.
BREAKING CHANGE: INTERNAL_ERROR, DOWNLOAD_ERROR, WORKER_ERROR and the fallback return 422 instead of 500; NETWORK_ERROR and SERVICE_UNAVAILABLE return 424 instead of 503; /api/tunnel/check failures return 424 instead of 502.
Cloudflare replaces an origin 502 body with its own page, so clients got "502: Bad gateway" in place of the error and resent each failed licence.
BREAKING CHANGE: SERVICE_ERROR and DRM_ERROR now return HTTP 422 instead of 502.
A service that sets the flag gets no cookie load, no authenticate() call and no cookie save on a search, on the CLI and in the REST search handler. /api/services reports it as anonymous_search.
--acodec now lists its codecs in --help, --vcodec drops the duplicate entries, and the REST API derives its allowlists from the same types, so AC-4, DDP, VORB and sub_format "original" stop being rejected and H264 stops being silently dropped. Adds shell completion for --acodec and repairs MultipleChoice completion. Raises the click floor to 8.2.
Regions in GEOBLOCK refuse the service and everything else is allowed. A hit stops the run with a region error instead of auto-proxying; the check also covers proxy exits and the remote-dl client region.
Delete the dead grouped-download block, the planner, and the music service hooks; Song now flows through the one download loop, gets tagged via tag_file, and answers -w with {disc}x{track} keys.
BREAKING CHANGE: GROUP_AUDIO_DOWNLOADS, get_music_track_options and get_music_collection_label are gone. A music service returns one Audio track per quality and lets the framework choose.
Adds GET /api/download/jobs/{job_id}/events with snapshot, status, progress and terminal events, query-param auth for EventSource in both serve modes, atomic progress-file writes, and stream-safe CORS and compression middleware.
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