MCP Fusion
AI-First DX for the Model Context Protocol.

Interface: MiddlewareEvent ​

Defined in: packages/core/src/observability/DebugObserver.ts:75

Emitted when middleware starts executing. One event per middleware function in the chain.

Properties ​

action ​

ts
readonly action: string;

Defined in: packages/core/src/observability/DebugObserver.ts:78

chainLength ​

ts
readonly chainLength: number;

Defined in: packages/core/src/observability/DebugObserver.ts:80

Number of middleware functions in the compiled chain

timestamp ​

ts
readonly timestamp: number;

Defined in: packages/core/src/observability/DebugObserver.ts:83

tool ​

ts
readonly tool: string;

Defined in: packages/core/src/observability/DebugObserver.ts:77

traceId? ​

ts
readonly optional traceId: string;

Defined in: packages/core/src/observability/DebugObserver.ts:82

Short hex trace ID for correlating events in the same request lifecycle

type ​

ts
readonly type: "middleware";

Defined in: packages/core/src/observability/DebugObserver.ts:76