# Task ID: 104

**Title:** Extend Traffic Events for ProxyModel Processing

**Status:** cancelled

**Dependencies:** 80 ✓

**Priority:** medium

**Description:** Add new traffic event types for proxymodel processing: content_original, content_transformed, stage timing, cache hits/misses.

**Details:**

Modify `src/mcplocal/src/http/traffic.ts`:

```typescript
export type TrafficEventType = 
  | 'client_request'
  | 'client_response'
  | 'upstream_request'
  | 'upstream_response'
  | 'client_notification'
  // New proxymodel events:
  | 'content_original'
  | 'content_transformed'
  | 'stage_executed'
  | 'stage_cache_hit'
  | 'stage_cache_miss';

export interface ContentOriginalEvent {
  eventType: 'content_original';
  sessionId: string;
  contentType: 'prompt' | 'toolResult';
  sourceName: string;
  content: string;
  charCount: number;
}

export interface ContentTransformedEvent {
  eventType: 'content_transformed';
  sessionId: string;
  contentType: 'prompt' | 'toolResult';
  sourceName: string;
  content: string;
  charCount: number;
  proxyModel: string;
  stages: string[];
  durationMs: number;
}

export interface StageExecutedEvent {
  eventType: 'stage_executed';
  sessionId: string;
  stageName: string;
  inputChars: number;
  outputChars: number;
  durationMs: number;
  cacheHit: boolean;
}
```

Emit these events from the pipeline executor.

**Test Strategy:**

Unit tests: events emitted at correct points in pipeline execution, event payloads contain correct data, cache hit/miss events distinguish correctly. Integration test with inspector showing new events.