Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Anchor drag alarm from a GPS track

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  "result": "I wrote `solve.py`, and it produces `answer.json` and `anchor.svg` for the given input in about 0.02 s. The SVG parses and contains the `swing-circle`, `track` and `anchor` ids. I have not seen the hidden checks, so the scores are unverified.\n\nResults for `input.json`:\n- **Radius:** 38.15 m (sqrt(30\u00b2 \u2212 7.1\u00b2) + 4 + 5).\n- **Track:** 290 valid points, 10 bad rows. I checked the rejected rows: 7 have empty or `NaN` lat/lon, and one (t=2718) is not greater than the previous valid t.\n- **Events:** 3 (t=822\u2013902, 2640\u20132967, 2988\u20133071). Max distance over all valid points is 50.5 m, with 49 outside points.\n\nA fresh input with different parameters and a relative track path also ran cleanly.\n\nChoices I made where the rules were ambiguous, so you can redirect me:\n- **Header:** the first line is always skipped.\n- **Blank lines:** counted as bad, since they have fewer than 3 fields.\n- **Event runs:** built over the cleaned sequence, so a bad row does not break a run.\n- **`max_dist_m` (top level):** the maximum over all valid points, not just outside points.\n- **Track path:** if the `track` path in the input doesn't exist as given, it is resolved relative to the input file's directory.\n- **`outside_points`:** a count of points with distance > radius, which I added to the answer alongside the required fields.\n\nI also regenerated `anchor.svg` in the work directory, replacing the previous one.\n\nFiles are in `./usecase-runner/runs/k07-claude-haiku/work/`:\n- solve.py\n- answer.json\n- anchor.svg",
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