F7 (operator, 2026-09-30): "Schema aliasing sounds like a really bad idea,
I support retiring it." C# now holds one type per schema, as TypeScript,
Python and Rust already do.
- Delete IsExactWireAlias and the branch that registered an identical second
type by CLR type only. A second type with the same schema name and version
is refused with CultSchemaConflictException naming both types and the
claimed id, whether it is identical, declares other compatible ids, or has
other members. The untyped DuplicateSchemaRegistration refusal and the
separate SchemaIdClaimedTwice path collapse into that one refusal.
- Owner-beats-lister (batch 10) is unchanged: one type owns an id, others may
list it as compatible.
- The per-name version index stays; it serves v1/v2 of one schema name, not
aliasing.
- Tests: the alias-registration tests are replaced by one refusal test over
identical, re-declared and re-shaped second types, in both registration
orders.
- cultcache-store-composition.md drops the AsSchemaAlias stale-protection note.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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