Nothing reaped reels before, so the on-disk cache and ledger grew
unbounded — each night's daily reel is a new ~4MB file + ledger row that's
stale within ~26h.
- Pre-gen self-prune: after recording a reel, prune_superseded keeps the
newest PREGEN_KEEP_PER_SCOPE (2) rows per (span, library) and unlinks the
superseded reels' mp4+sidecar. Caps the ledger/disk at ~spans×libraries×2.
- On-disk sweeper (spawn_reel_cache_sweeper): every 24h, removes reel mp4s
with no ledger row and no live job older than REEL_CACHE_MAX_AGE_DAYS (7) —
bounding the on-demand cache, which has no ledger row and otherwise grows
forever — plus crashed-render cruft (.mp4.tmp/.concat.txt/orphan sidecars).
Runs regardless of REEL_PREGEN_ENABLED; disable with REEL_CACHE_SWEEP_ENABLED=0.
- New DAO methods prune_superseded + all_cache_keys (with tests); env knobs
documented in .env.example.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>