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>
Task groups 1–2 of gpx-parser-robustness. The parser trusted its input:
`parseFloat(attr ?? "0")` turned a missing lat/lon into a 0,0 Null Island
point (which passes range validation) and garbage into NaN that poisoned
distance and gain/loss totals; `<rte>`/`rtept` files (Garmin courses, many
exporters) parsed to zero track points and were rejected.
- `parsePoint`: skip a trkpt/rtept whose lat/lon is missing or non-finite
(no more 0,0 default); a non-finite `<ele>` becomes `undefined` so it
never leaks NaN into totals. Parsing stays parseFloat-lenient (trailing
junk like `471.0m` still accepted), gated by Number.isFinite.
- Drop segments left with fewer than 2 points (render nothing / break
distance math).
- Parse `<rte>` as track segments appended after `<trk>` segments, rtept
handled identically — route-only files now import.
No GpxData shape change; well-formed files parse identically. Updated the
geom single-point test to the new drop-invariant.
Verified: gpx typecheck + lint clean, 76/76 tests pass, journal + planner
typecheck unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add docs/inspirations.md as the durable record of the 2026-07-05/06
prior-art research — per-project learnings with source paths, canonical
credit lines, and the changes each spawned — and extend the
acknowledgment lists in philosophy.md/architecture.md (Organic Maps,
Endurain, wanderer).
New OpenSpec changes (proposal/design/specs/tasks each):
- Organic Maps: elevation-profile-hardening, gpx-parser-robustness,
hiking-time-estimate, poi-index, hiking-foot-profile
- Endurain: account-export, activity-duplicate-review,
fit-parsing-hardening, activity-locations, self-hosting-guide,
activity-privacy-controls
- wanderer: federation-hardening, link-share-tokens
- credits-page (user-visible acknowledgments)
Updated in-flight changes with wanderer prior-art sections:
route-federation, route-discovery.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
