feat(frozen): schema_ir_hash — canonical frozen-schema digest - #49
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BLAKE3 over the `bincode` encoding of a schema's `&[FrozenUnit]` (the same serialization the CAS stores blobs with), folded to `u64` for the connection handshake's `ir_hash`. Deterministic for a given frozen IR, independent of the generator and the host — so every target language embeds the same value and two ends of a connection generated from one schema agree. Replaces each generator hashing its own language-specific rendering (FNV over a `Debug` view, in the Rust generator today). Re-exported as `comline_core::schema::ir::frozen::schema_ir_hash`.
This was referenced Sep 2, 2026
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First of the
IR_HASHchain — a canonical, cross-language frozen-schema digest.schema_ir_hash(&[FrozenUnit]) -> u64= BLAKE3 over the units'bincodeencoding (the CAS's own blob serialization), folded to 64 bits for the connection handshake'sir_hash.Today each generator hashes its own rendering — the Rust generator does FNV-1a over a
Debugview of the frozen units, which is generator- and language-specific. This function is the one canonical identity: same frozen IR ⇒ same value on every target, so two ends of a connection generated from the same schema (Rust ⇆ Rust, later Rust ⇆ TS) agree.comline_core::schema::ir::frozen::schema_ir_hash(re-export).Downstream (comline-rust swaps its local
ir_hashfor this; the generation / cli core-pin bumps ride along) follows once this merges.