Add ghost race: replay your best run - #4
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- GhostRecorder decimates player position to ~10 Hz tracks (capped 6000 pts) - Track persists per level when the run sets a new best score - Daily Rex tracks are date-stamped and only replay for the same daily seed - Translucent ghost Rex with a small tag races alongside the player - G key / menu button toggles the ghost (persisted, default on) - 12 new unit tests + 2 integration tests (123 total, all passing)
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What
A local "race yourself" mode: the game records your position each frame (decimated to ~10 Hz), and when a run beats your stored best score for a level, the track is persisted. In later runs a translucent ghost Rex replays that best run alongside you.
Details
src/ghost.ts(new) —GhostRecorder(trailing-sample decimation, 6000-pt cap, discards runs under 4 samples) andGhostPlayer(monotonic index walk + linear interpolation, clamped past the track's end, facing from sample direction).src/store.ts—getGhostTrack/saveGhostTrack(tinyrex_ghost_0..2,tinyrex_ghost_daily),getGhostEnabled/setGhostEnabled(default on). Daily tracks are date-stamped withdailySeed()and only replay for the seed they were recorded on.src/game.ts— records during play, saves on new best (hand-built + daily), draws the ghost at 40% alpha with a small "GHOST" tag before the player,Gkey + menu toggle button, CONTROLS row updated.Validation (local — CI is failing for pre-existing unrelated reasons)
npm run typecheck✓npm test— 123/123 ✓npm run build✓ (single file, ~106 kB / 33 kB gzip)npm run lint✓Gkey toggle persists, no ghost when off, zero page errors ✓Supersedes nothing; stacks on #3 (Daily Rex).