Validation and compatibility Shared Rust validator platform-extensions::validatebundle is the canonical native validator. validatebundlejsonwasm calls that same function after decoding the wire-format bundle. The SDK ships the compiled Wasm module and exposes initializeExtensionValidator, validateBundle, and validateBundleJson. Validation checks manifest rules, hook catalogue membership/mode, safe file paths, and that declared entrypoint files exist. The Rust boundary intentionally does not vali