Scrubbing off-live now REPLAYS actual recorded traffic instead of just hiding
aircraft (orbits were already computable in the past; live traffic was not).
- record.py (new, dev-only daemon): every 180s fetches through the local proxy
(so the shared cache dedupes quota — never hits OpenSky directly), reduces to
airborne essentials, zlib-compresses into SQLite data/history.db (WAL), keeps
72h, prunes + checkpoints hourly. Wired into John's ~/.jobs heartbeat.
- serve.py: GET history/aircraft?t=<epoch_s> returns the nearest snapshot within
±10 min (read-only per-request sqlite connection — WAL means never locks the
recorder), else a JSON 404.
- aircraft.js: onClockTick drives replay when not-live. Build loop factored into
renderPlanes() shared by live + replay. Replayed aircraft show amber ("replay
· <time> · N aircraft"); 404 → "no history for this time" + hide (this is the
prod-without-recorder path too). Requests coalesce so a scrub landing mid-fetch
still resolves to its final snapshot; debounced on requested-time distance.
- data/ gitignored (recorder db is local-only, never committed or deployed).
Verified: history endpoint hit/404/400; frontend replay across -1h/-2h/-3h maps
to distinct snapshots, 404 transitions, live-resume; recorder daemon writes
heartbeat + snapshots.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
