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    AgentCompositionError

    pub(all) suberror AgentCompositionError {
    InvalidImplementation(reason~ : String)
    MissingRequiredService(service_name~ : String)
    InvalidAuthMethods(reason~ : String)
    ConflictingSupport(reason~ : String)
    } derive(Eq,
    Debug
    )

    Failures found while composing an immutable Agent endpoint.

    ClientCompositionError

    pub(all) suberror ClientCompositionError {
    InvalidImplementation(reason~ : String)
    MissingRequiredService(service_name~ : String)
    ConflictingSupport(reason~ : String)
    } derive(Eq,
    Debug
    )

    Failures found while composing an immutable Client endpoint.

    HandlerError

    pub(all) suberror HandlerError {
    Application(message~ : String)
    InvalidParams(message~ : String)
    Cancelled
    UnavailableOperation(method_name~ : String)
    } derive(Eq,
    Debug
    )

    Canonical checked failures returned by application-owned handlers and typed outbound ports on either endpoint side.

    Every payload is a host-authored, already-sanitized string meant for the client to display: the adapter forwards it verbatim onto the JSON-RPC error (message plus data), so a user can read — and share with a developer — what actually happened. Handlers must not put secrets, raw payloads, or stack traces in these strings.

    Source Files