Backend-only ~30-80 LOC. Walk media-topology entities (already partially
done at iter4 Commit Z); require at least one entity with function ==
MEDIA_ENT_F_PROC_VIDEO_DECODER. Eliminates the hantro encoder false-match
that breaks vainfo + ffmpeg-vaapi on every other reboot.
5 boolean Phase 1 criteria locked. No kernel work. No pixel-correctness
chasing. Quality-of-life delivery; removes per-session env-override
friction.
Predicted lowest-difficulty iteration since iter1. 2-3 hours wallclock.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
