Claude Opus 5.5 (effort default (no --effort flag) · thinking on) on Model ladder: fix 10 real merged bugs with tests hidden

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  "result": "I fixed `intcomma()` in `src/humanize/number.py`. `intcomma(10**400 + 123)` and the negative version now return every digit, grouped in threes and ending in `,123`.\n\n**Cause:** to check for NaN and infinity, `intcomma()` turned every input into a float. Python can't convert an int that large to a float, so it raised `OverflowError`.\n\n**Fix:**\n- **Integers skip the float check.** An integer can never be NaN or infinity, so the check isn't needed. Floats, Decimals and other non-integer inputs still get it.\n- **Large numbers passed as strings:** this was a related bug. `intcomma(str(10**400))` was returning `\"+Inf\"`, because the string was parsed as a float before being tried as an integer. Strings without a `.` are now parsed as integers first. Strings like `\"inf\"` and `\"nan\"` still return `+Inf` and `NaN`. Other strings that aren't integers, such as `\"1e3\"`, still come back unchanged as before.\n- **Integers with `ndigits`:** `intcomma(10**400, 2)` would have overflowed the same way, so an integer with `ndigits` set is now converted to a `Decimal` before formatting.\n\n**Tests:** I added four cases to `test_intcomma` in `tests/test_number.py`: a large positive int, a large negative int, the large int as a string, and the large int with `ndigits=2`.\n\n**Results:** `tests/test_number.py` passes (236 tests). The full suite has 713 passed, 110 skipped and 15 errors. The errors are all in `tests/test_benchmarks.py`: the `pytest-benchmark` plugin isn't installed in `.venv`, so the `benchmark` fixture is missing. The same 15 errors occur without my change.",
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