Struct PluginManager 

pub struct PluginManager { /* private fields */ }

Manages the lifecycle of a Haskell WASM plugin.

Loads a WASM module from embedded bytes and registers a single host function (yield_effect) that dispatches all effects through the EffectRegistry.

Architecture

PluginManager::call("handle_mcp_call", input)
    ↓
WASM Guest (Haskell) - pure logic, yields effects
    ↓
yield_effect host function → EffectRegistry::dispatch
    ↓
EffectHandler implementations (git, github, custom, ...)

Implementations

impl PluginManager

pub async fn new( wasm_bytes: &[u8], registry: Arc<EffectRegistry>, ) -> Result<Self>

Load a WASM plugin from bytes and register the yield_effect host function.

Arguments

• wasm_bytes - WASM binary content (embedded at compile time)
• registry - Effect registry for dispatching all effects

pub fn content_hash(&self) -> &str

Get the SHA256 content hash of the loaded WASM binary (first 12 hex chars).

pub async fn call<I, O>(&self, function: &str, input: &I) -> Result<O>

where I: Serialize + Send + Sync + 'static, O: for<'de> Deserialize<'de> + Send + 'static,

Call a WASM guest function with typed input/output marshalling.

Input is serialized to JSON, passed to the WASM function, and the result is deserialized from JSON.

Uses spawn_blocking because Extism Plugin is not Send.

Trait Implementations

impl Clone for PluginManager

fn clone(&self) -> PluginManager

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.