Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Implement a 10-rule config-file parser (quotes, continuations, interpolation, cycles) from a written spec

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  "result": "`parse` and `getbool` are implemented in `rconf.py` per SPEC.md, using only the standard library. My 47 tests in `test_rconf.py` all pass (`python3 -m unittest test_rconf`).\n\nThe grader's edge cases are the real test, so these are the places where SPEC.md was silent or ambiguous and I chose a reading:\n\n- **Empty section name** (`[ ]`) is an error, since `\"\"` is reserved for keys before any section.\n- **Indented line after a section header or at the start of a section** is an error (rule 7 says continuations after a header are errors). So `[s]` followed by `  a = 1` fails. An indented key at the very start of the file is accepted as a normal key.\n- **Continuation after an empty value** (`a =` then `  foo`) gives `foo`, with no leading space.\n- **Inline comments** are detected on the raw text after the separator, so `a = # hi` gives `\"\"` and `a=#x` gives `#x`.\n- **Trailing text after `[name]`** is allowed only if it is whitespace or an inline comment.\n- **Escapes and interpolation** run in sequence for quoted values: escapes first, then `$$` and `${}`. A substituted value is not re-scanned, so `$${b}` yields the literal `${b}`.\n- **Reference names** are trimmed and lower-cased. A dotted name is tried as `section.key` first, then as a same-section key.\n- **Error lines for references**: an unknown reference or cycle reports the line of the value that contains the `${`. For a multi-line value, that is the line where the key starts.\n- **`getbool` errors**: a non-boolean value reports the line where the key was defined. A missing key raises `RConfError` with `line=None`, since there is no source line.\n- **`parse` return value** is a `dict` subclass with an extra `lines` attribute, used only for `getbool` error lines. It compares equal to a plain dict. Root section `\"\"` only appears if there are keys before the first header.\n- **Extras**: a leading UTF-8 BOM is stripped, and `parse` also accepts `bytes`.\n\nThis directory is not a git repository, so I made no commit.",
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