Module loader 

WasmLoader — top-level entry point for loading WASM Component Model plugins.

Two-pass dance per proposal §5.6:

1. Build engine with no caps; instantiate the component; call the manifest export to learn what caps the plugin needs.
2. Intersect declared ∩ host grants; rebuild the engine with epoch-interruption + fuel metering enabled per the plugin manifest’s resource limits; instantiate with the cap-gated Linker; call register to learn the qnames; for each entry construct an adapter (currently ComponentScalarFn; aggregate and procedure adapters land in M6b.2) and push it into the PluginRegistrar.

The actual wasmtime::Engine + Component + Linker<HostState> plumbing lives in this file; the linker construction details are in crate::linker.

Structs

AggregatePluginInstance

Pooled instance for the aggregate-plugin world.

ComponentManifest

CM plugin manifest in canonical JSON form (the plugin’s manifest export’s payload). Mirrors proposal §14 and the Extism manifest shape — same fields, different ABI host.

ComponentPlugin

A loaded WASM component presented as a uni_plugin::Plugin.

LoadOutcome

Outcome of a successful WasmLoader::load.

PreparedComponent

Outcome of WasmLoader::prepare — everything the host needs to decide whether to instantiate the component (and what to plumb in).

ProcedurePluginInstance

Pooled instance for the procedure-plugin world.

RegistrationManifest

Top-level register export payload.

ScalarPluginInstance

Concrete instance type pooled by WasmInstancePool.

WasmLoader

Top-level WASM Component Model plugin loader.

WireFnSignature

Wire-level scalar signature shipped by a plugin’s register export.

Enums

RegistrationEntry

One registration entry.

WireArgType

Wire-level argument type shipped by a plugin.