Module spec 

EngineSpec: the serializable engine wire format.

EngineSpec is what Python’s compile_engine emits and what the Rust Engine consumes. It bundles the engine identity (EngineConfig, needed later to load the matching PerfDatabase) with the precompiled context / generation op lists. Each op is an OpSpec — a public alias for the crate’s [Op] enum — and the lists round-trip through bincode, including the recursive Overlap / Fallback children.

Vision is never on the wire

[Op::Vision] derives serde with every other variant (it remains part of the shared session path), but a compiled EngineSpec never contains a Vision op: compile_engine decomposes the vision encoder into its child Gemm / EncoderAttention / Elementwise ops, each an existing variant. The type round-trips soundly (see the test below); the constraint is purely a producer-side rule, not enforced by the enum.

Structs

EngineSpec

Serializable compiled engine.

Enums

OpSpec

Public name for the serializable op. Aliases the crate’s [Op] enum so the “OpSpec” surface exists without duplicating the definition. Typed operator. One variant per Python operations family.