Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Parse 300 transaction lines in 6 formats (EU numbers, 12h times, minor units, 'Last, First')

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  "result": "I wrote `parse.py` and ran it. `parsed.json` now has all 300 records, one per line, in order. Every line matched one of the six formats in the log, and the script stops with an error if any line doesn't match, so nothing gets skipped silently.\n\nI spot-checked a sample of lines against the source rather than all 300. Specific checks that passed:\n- Every ref has the `X123-4567` form, and the decoy `Z000-0000` in the \"Note:\" lines was never picked up.\n- No \"Last, First\" names remain. The first run left five `O'Brien, Kate` entries from one format unconverted; I fixed that, and they now read `Kate O'Brien` with the apostrophe kept. Accented names like `Zo\u00eb Salda\u00f1a` and `J\u00f6rg M\u00fcller` come through intact.\n- 12-hour times convert correctly, including the tricky ones: `12:53 PM` becomes `12:53`.\n- European amounts parse correctly: `16.253,45` becomes `16253.45`.\n- `amt_minor` values are divided by 100, except for JPY, which is used as-is.\n- 40 records are negative refunds. They come from:\n  - \"REFUND\" and \"Erstattung\" entries\n  - \"we refunded\" notes\n  - amounts already negative in the JSON lines and the semicolon-separated lines\n\nTwo assumptions to be aware of:\n- Dates like `1/9/2026` are read as month/day (US style). Lines such as `2/27/2026` confirm that order.\n- Amounts are rounded to 2 decimal places.\n\nTo run it again: `python3 parse.py`. You can optionally pass an input file and an output file as arguments.",
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