feat(typespec): nested LIST + categorical dtype fidelity, Pandas categorical (item 54, gaps 2-3) - #295

Merged

discreteds merged 6 commits into

feature/typespec-list-categorical-fidelity

Aug 17, 2026

Commits on Aug 17, 2026

feat(typespec): nested LIST inner type via item_type, all targets (item 54, task 8)
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88e84b3
feat(typespec): shared categorical_values helper; conform uses it (item 54, task 9)
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6fe66cf
feat(typespec): to_polars_schema categorical branch (item 54, task 10)
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57cd113
feat(typespec): pandas categorical dtype fidelity (item 54, task 11)
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a9ff0d1
test(typespec): blast-radius + cross-backend materialization for item 54 dtypes (task 12)
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6e182fb
fix(dtypes): typed InvalidBackendTypeError for semantically-invalid PyArrow strings; review round (GLM-5.2)
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d5e5446