Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Finish a JSON Schema subset validator (types, JSON equality, pointer-escaped paths, $ref recursion, combinators)

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  "result": "I rewrote `validator.py` so it follows `SCHEMA_RULES.md` section by section. The public signature is still `validate(schema, instance)`, errors are still `{\"path\", \"keyword\"}` dicts, and `SchemaError` is unchanged. It uses only the standard library.\n\nI checked it with about 30 hand-written schema/instance cases, run from a scratch directory outside the work tree. All pass, including the trickier rules:\n- `1` vs `true` and `1` vs `1.0` in `enum`, `const` and `uniqueItems`.\n- `integer` accepts `2.0` but rejects `2.5` and `true`.\n- `type` failure reports only the `type` error and skips the other keywords in that schema object.\n- `required` errors sit at the object's path; property paths escape `~` and `/`.\n- `anyOf`, `oneOf` and `not` each give one error with no sub-errors.\n- `$ref` to `#` and to `#/$defs/...` works, including recursive schemas.\n\nThe grader's hidden suite was not available, so this is my own check, not the grader's.\n\nJudgment calls the spec left open:\n- **`$ref`** accepts any JSON pointer from the root, not only `#/$defs/<name>`. An unresolvable one raises `SchemaError`, as does a `$ref` that cycles back to the same instance without consuming any of it (for example `{\"$ref\": \"#\"}` on its own).\n- **Malformed schemas** raise `SchemaError`. This covers an unknown type name, a non-list `enum`/`required`/`allOf`, a bad regex in `pattern`, a non-number `minimum`, and a non-schema `items`. Keyword values are checked only when that keyword is evaluated, so a malformed keyword on an instance it never applies to passes silently.\n- **`exclusiveMinimum` / `exclusiveMaximum`** are treated as numbers only, per the spec, so the draft-4 boolean form raises `SchemaError`.\n- **`required`** emits one error per list entry, so a duplicated missing name produces two errors.\n- **Empty `anyOf` and `oneOf`** produce an error, since no subschema is valid and the count is not exactly 1.",
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