Rotifer v0.6.5: Cross-Binding Proof — How We Validated IR Portability Without Deploying to a Blockchain

Rotifer is a protocol where AI capabilities are compiled to portable IR (Intermediate Representation) and can run in any binding environment. That's the theory. v0.6.5 provides the proof. The Validation Gap The IR specification states: IR 1.0 release condition: at least two binding environments pass cross-binding interoperability tests. We had one binding (Local/Cloud) and zero cross-binding tests. The most critical section of the IR spec — §10, Cross-Binding Interoperability — existed only on paper. Mock Over Deploy A full Web3 Binding requires Solidity contracts, Arbitrum deployment, and token economics — months of work. But validating IR portability only requires two environments with different enough constraints. We built Web3MockBinding: same wasmtime engine, but with Gas metering instead of Fuel, 16 MB memory (vs 64 MB), 5-second timeout (vs 30s), and no filesystem access. RotiferBinding Trait The key abstraction: pub trait RotiferBinding: Send + Sync { fn binding_id(&self) -