V3 deterministic media-bridge capability pack. By-value connector composition (service_kind=cli, no separate ingredient): one local ffmpeg CLI ingredient exposes readiness, audio extraction, ASR-friendly WAV normalization, audio waveform rendering, video thumbnail extraction, short GIF preview generation, and compact MP4 transcoding. The parse-in enabler of the media toolkit: pulling audio out of video / screen-recording / podcast containers yields a smaller audio file an ASR step (whisper audio.transcribe) or an audio-capable model can read; thumbnail, waveform, and GIF preview outputs produce compact visual previews for media triage. Fixed-function and reproducible: transformations happen locally before any model sees the content. Write-tier operations write only to an engine-managed throwaway temp dir, ingest the produced artifact into data.file.received (CAS), and surface result.file_ref; downstream steps consume bytes through Gateway-gated file refs rather than op-step values. The source can be a data.file ref or trusted local path. Large/long media can exceed the 90s foreground cap; those ride a detached execution path when it lands. Requires the ffmpeg binary on PATH. Local operations are pinned to the file/pipe protocol whitelist so URL inputs cannot trigger remote fetches. Part of the Lane-1 media toolkit alongside whisper (transcribe), mediainfo (inspect), and imagemagick/vips (image transforms).