`keeps a non-ASCII field name…` asserted that Code Mode omits the native
schemas so nothing else carries a dropped field's name, requiredness, and
type. That holds under `mode: 'code'` only; under `both` the native schemas
ship alongside the SDK, as the module header says. Earlier rounds swept
`py-types.ts` for this family and qualified five sites there; the spec was
never in scope, so this is the family's last unqualified member rather than
residue from those fixes.
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