# Migration Complete

The new CDP relay server implementation has been moved into `playwriter/src/extension/`.

## What Changed

### Files Removed
- ❌ `src/extension/cdpRelay.ts` (~417 lines) - Old class-based implementation
- ❌ `src/extension/types.ts` - Old type definitions

### Files Added/Updated
- ✅ `src/extension/relay-server.ts` (321 lines) - New inline implementation
- ✅ `src/extension/protocol.ts` (34 lines) - Message type definitions
- ✅ `src/extension/extensionContextFactory.ts` - Now just re-exports `startRelayServer`

### Updated Scripts
- ✅ `scripts/extension-server.ts` - Uses new simplified API

## New API

**Before:**
```typescript
const controller = new AbortController()
const { cdpRelayServer } = await startRelayServer(controller.signal)
// Complex class-based API
cdpRelayServer.stop()
```

**After:**
```typescript
const server = await startRelayServer({ port: 9988 })
// Simple object API
server.close()
```

## Code Reduction

| Metric | Before | After |
|--------|--------|-------|
| Total LOC | ~600 | ~370 |
| Files | 4 | 3 |
| Classes | 2 | 0 |
| Helper functions | Multiple modules | All inlined |

## Dependencies Added

```json
{
  "hono": "^4.10.6",
  "@hono/node-server": "^1.19.6",
  "@hono/node-ws": "^1.2.0"
}
```

## Testing

```bash
cd playwriter
pnpm typecheck  # ✅ Passes
pnpm build      # ✅ Builds successfully

# Run the server
vite-node scripts/extension-server.ts
```

## Architecture

Everything is now in **one file** (`relay-server.ts`):
- Target registry (simple Map)
- Extension request/response handling
- CDP command routing
- WebSocket endpoints
- Message forwarding

No abstractions, no helper modules, just straightforward code.