trails/openspec
Ullrich Schäfer 4536470eb9
feat(gpx): post-parse timestamp repair
Task group 3 of gpx-parser-robustness. Timestamps were passed through raw;
a partially-broken time channel from a flaky recorder silently shrank
moving time and skewed start-time derivation.

New pure `timestamp-repair.ts` applied per segment after parsing:
- validity = Date.parse yields a finite epoch;
- a segment with no valid timestamps is left untouched (untimed track);
- >50% invalid → drop all the segment's timestamps (noise, not signal);
- otherwise → linearly interpolate invalid runs between valid neighbours
  (by point index), leading/trailing runs clamp to the nearest valid
  timestamp; only repaired points are rewritten as ISO 8601, valid points
  keep their original string.

Monotonicity intentionally not enforced (movingTime already skips
non-positive intervals; reordering would be fabrication). No GpxData shape
change. Wired into parseTracks output in parse.ts.

Verified: gpx typecheck + lint clean, 81/81 tests pass, journal + planner
typecheck unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 00:10:57 +02:00
..
changes feat(gpx): post-parse timestamp repair 2026-07-14 00:10:57 +02:00
specs chore(openspec): archive federation-hardening 2026-07-13 23:54:56 +02:00
CAPABILITIES.md openspec: archive profile-stats + profile-weekly-distance, sync specs 2026-06-14 16:34:06 +02:00