Alex Newman
3030f518b5
- Removed fragile PM2 string parsing and replaced with direct PM2 restart logic. - Eliminated silent error handling in worker-utils.ts for better error visibility. - Extracted duplicated session auto-creation logic into a new helper method getOrCreateSession() in worker-service.ts. - Centralized configuration values and replaced magic numbers with named constants. - Updated health check logic to ensure worker is restarted if unhealthy. - Removed unnecessary getWorkerPort() wrapper function. - Improved overall code quality and maintainability by applying DRY and YAGNI principles.
908 lines
30 KiB
Markdown
908 lines
30 KiB
Markdown
# Worker Service & Worker Utils: Comprehensive YAGNI Analysis
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**Date**: 2025-11-06
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**Files Analyzed**:
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- `src/services/worker-service.ts` (1228 lines)
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- `src/shared/worker-utils.ts` (110 lines)
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**Overall Assessment**: 80% excellent architecture, 20% cleanup needed. Worker-service is well-structured with proper error handling priorities, but worker-utils contains critical bugs and YAGNI violations.
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---
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## Executive Summary
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### What These Files Do
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**worker-service.ts**: Long-running Express HTTP service managed by PM2. Handles AI compression of observations, session management, SSE streaming for web UI, and Chroma vector sync. This is the heart of claude-mem's async processing.
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**worker-utils.ts**: Utilities for ensuring the worker is running. Called by hooks at session start to verify/start the PM2 worker process.
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### Critical Findings
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#### 🔥🔥🔥🔥🔥 SEVERITY 5 - MUST FIX IMMEDIATELY
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1. **worker-utils.ts:75** - Fragile string parsing of PM2 output causes false positives
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2. **worker-service.ts:754-844** - 60+ lines of identical session auto-creation code duplicated 3 times
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3. **worker-utils.ts:70** - Silent error handling defers PM2 failures instead of failing fast
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#### 🔥🔥🔥 SEVERITY 3 - FIX SOON
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4. **worker-utils.ts:77-95** - No handling for "running but unhealthy" case
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5. **worker-utils.ts:107-109** - Useless `getWorkerPort()` wrapper function
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6. **worker-service.ts:316** - 1500ms debounce is 10x too long
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#### 🔥🔥 SEVERITY 2 - CLEANUP WHEN CONVENIENT
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7. Multiple magic numbers (100ms, 1000ms, 10000ms) without named constants
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8. Hardcoded default values duplicated across multiple locations
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9. Hardcoded model validation list that will become stale
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---
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## Complete Function Catalog
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### worker-utils.ts Functions
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| Function | Lines | Purpose | Status |
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|----------|-------|---------|--------|
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| `isWorkerHealthy(timeoutMs)` | 10-19 | Check /health endpoint responds | ✅ OK |
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| `waitForWorkerHealth(maxWaitMs)` | 24-36 | Poll until worker healthy | 🔥 Inefficient timeout |
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| `ensureWorkerRunning()` | 43-102 | Main orchestrator to start worker | 🔥🔥🔥🔥🔥 CRITICAL BUGS |
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| `getWorkerPort()` | 107-109 | Returns FIXED_PORT constant | 🔥🔥🔥🔥🔥 DELETE THIS |
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### worker-service.ts Functions
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| Function | Lines | Purpose | Status |
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|----------|-------|---------|--------|
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| `findClaudePath()` | 35-65 | Find Claude Code executable | ✅ Excellent |
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| Constructor | 107-139 | Setup Express routes | ✅ Good |
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| `start()` | 141-173 | Start HTTP server, init Chroma | ✅ Excellent prioritization |
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| `getUIDirectory()` | 178-189 | Get UI path (CJS/ESM) | ✅ Good defensive code |
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| `handleHealth()` | 194-196 | GET /health | ✅ PERFECT |
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| `handleViewerHTML()` | 201-211 | GET / | ✅ Good |
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| `handleSSEStream()` | 216-245 | GET /stream (SSE) | ✅ Good |
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| `broadcastSSE()` | 250-275 | Broadcast to clients | ✅ Excellent defensive code |
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| `broadcastProcessingStatus()` | 280-286 | Broadcast processing state | ✅ Good |
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| `checkAndStopSpinner()` | 291-318 | Debounced spinner stop | 🔥 1500ms too long |
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| `handleStats()` | 323-365 | GET /api/stats | 🔥 Hardcoded paths/version |
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| `handleGetSettings()` | 370-397 | GET /api/settings | 🔥 Duplicated defaults |
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| `handlePostSettings()` | 402-461 | POST /api/settings | 🔥 Hardcoded model list |
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| `handleGetObservations()` | 467-515 | GET /api/observations | ✅ Excellent |
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| `handleGetSummaries()` | 517-576 | GET /api/summaries | ✅ Excellent |
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| `handleGetPrompts()` | 578-631 | GET /api/prompts | ✅ Excellent |
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| `handleGetProcessingStatus()` | 637-639 | GET /api/processing-status | ✅ Good |
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| `handleInit()` | 645-744 | POST /sessions/:id/init | ✅ Good but has duplication |
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| `handleObservation()` | 750-803 | POST /sessions/:id/observations | 🔥🔥🔥🔥🔥 MASSIVE DUPLICATION |
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| `handleSummarize()` | 809-858 | POST /sessions/:id/summarize | 🔥🔥🔥🔥🔥 MASSIVE DUPLICATION |
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| `handleComplete()` | 864-873 | POST /sessions/:id/complete | ✅ PERFECT |
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| `handleStatus()` | 878-893 | GET /sessions/:id/status | ✅ Good |
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| `runSDKAgent()` | 898-963 | Run SDK agent loop | ✅ Excellent |
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| `createMessageGenerator()` | 969-1060 | Async generator for SDK | ✅ Excellent |
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| `handleAgentMessage()` | 1066-1201 | Parse and store AI response | ✅ EXCELLENT |
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| `main()` | 1205-1225 | Entry point + signals | ✅ Good |
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---
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## Line-by-Line Analysis
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### worker-utils.ts
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#### Lines 1-5: Imports and Constants
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```typescript
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const FIXED_PORT = parseInt(process.env.CLAUDE_MEM_WORKER_PORT || "37777", 10);
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```
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**What**: Parse port from env var with fallback to 37777
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**Why**: Need to know which port to connect to
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**Critique**: ✅ Good - simple constant, no unnecessary abstraction
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---
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#### Lines 10-19: `isWorkerHealthy(timeoutMs = 100)`
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```typescript
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async function isWorkerHealthy(timeoutMs: number = 100): Promise<boolean> {
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try {
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const response = await fetch(`http://127.0.0.1:${FIXED_PORT}/health`, {
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signal: AbortSignal.timeout(timeoutMs)
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});
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return response.ok;
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} catch {
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return false;
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}
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}
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```
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**What**: Checks if /health endpoint responds within timeout
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**Why**: Need to know if worker is running before trying to start it
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**Critique**:
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- Default 100ms is used once (line 45 initial check)
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- Explicit 1000ms passed at line 29 (during startup polling)
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- This inconsistency is actually INTENTIONAL: quick initial check vs. waiting for startup
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- ✅ **VERDICT**: Reasonable pattern
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**Why the two timeouts?**
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- 100ms: "Is it already running?" (fast check, don't wait)
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- 1000ms: "Is it starting up?" (wait for initialization)
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---
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#### Lines 24-36: `waitForWorkerHealth(maxWaitMs = 10000)`
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```typescript
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async function waitForWorkerHealth(maxWaitMs: number = 10000): Promise<boolean> {
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const start = Date.now();
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const checkInterval = 100; // Check every 100ms
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while (Date.now() - start < maxWaitMs) {
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if (await isWorkerHealthy(1000)) {
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return true;
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}
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// Wait before next check
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await new Promise(resolve => setTimeout(resolve, checkInterval));
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}
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return false;
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}
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```
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**What**: Polls health endpoint every 100ms until healthy or timeout
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**Why**: Worker takes time to start, need to wait
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**Critique**:
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🔥 **MAGIC NUMBER #1**: Line 26 `checkInterval = 100` - no units! Is this milliseconds? Should be `CHECK_INTERVAL_MS = 100`
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🔥 **MAGIC NUMBER #2**: Line 29 `isWorkerHealthy(1000)` - why 1000ms timeout per check?
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🔥 **INEFFICIENCY**: Each health check has 1000ms timeout, but we check every 100ms. If the worker is down, each check waits 1000ms to timeout. We could fail faster with a 100ms timeout since we retry quickly anyway.
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**The Math**:
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- Check interval: 100ms
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- Health timeout: 1000ms
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- If worker is down, first check fails after 1000ms, then we wait 100ms, then try again
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- Total time to detect "worker is down" on first check: 1000ms (could be 100ms)
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**RECOMMENDED**: Use 100ms timeout for health checks since we retry every 100ms anyway:
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```typescript
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const HEALTH_CHECK_TIMEOUT_MS = 100;
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const HEALTH_CHECK_POLL_INTERVAL_MS = 100;
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const HEALTH_CHECK_MAX_WAIT_MS = 10000;
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async function waitForWorkerHealth(): Promise<boolean> {
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const start = Date.now();
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while (Date.now() - start < HEALTH_CHECK_MAX_WAIT_MS) {
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if (await isWorkerHealthy(HEALTH_CHECK_TIMEOUT_MS)) return true;
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await new Promise(resolve => setTimeout(resolve, HEALTH_CHECK_POLL_INTERVAL_MS));
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}
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return false;
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}
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```
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---
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#### Lines 43-102: `ensureWorkerRunning()` - 🔥🔥🔥🔥🔥 THE DISASTER ZONE
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```typescript
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export async function ensureWorkerRunning(): Promise<void> {
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// First, check if worker is already healthy
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if (await isWorkerHealthy()) {
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return; // Worker is already running and responsive
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}
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const packageRoot = getPackageRoot();
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const pm2Path = path.join(packageRoot, "node_modules", ".bin", "pm2");
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const ecosystemPath = path.join(packageRoot, "ecosystem.config.cjs");
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// Check PM2 status to see if worker process exists
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const checkProcess = spawn(pm2Path, ["list", "--no-color"], {
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cwd: packageRoot,
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stdio: ["ignore", "pipe", "ignore"],
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});
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let output = "";
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checkProcess.stdout?.on("data", (data) => {
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output += data.toString();
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});
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// Wait for PM2 list to complete
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await new Promise<void>((resolve, reject) => {
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checkProcess.on("error", (error) => reject(error));
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checkProcess.on("close", (code) => {
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// PM2 list can fail, but we should still continue - just assume worker isn't running
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// This handles cases where PM2 isn't installed yet
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resolve();
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});
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});
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// Check if 'claude-mem-worker' is in the PM2 list output and is 'online'
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const isRunning = output.includes("claude-mem-worker") && output.includes("online");
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if (!isRunning) {
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// Start the worker
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const startProcess = spawn(pm2Path, ["start", ecosystemPath], {
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cwd: packageRoot,
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stdio: "ignore",
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});
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// Wait for PM2 start command to complete
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await new Promise<void>((resolve, reject) => {
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startProcess.on("error", (error) => reject(error));
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startProcess.on("close", (code) => {
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if (code !== 0 && code !== null) {
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reject(new Error(`PM2 start command failed with exit code ${code}`));
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} else {
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resolve();
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}
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});
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});
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}
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// Wait for worker to become healthy (either just started or was starting)
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const healthy = await waitForWorkerHealth(10000);
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if (!healthy) {
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throw new Error("Worker failed to become healthy after starting");
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}
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}
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```
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**What**: Ensure PM2 worker is running - check health, check PM2 status, start if needed, wait for health
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**Why**: Hooks need worker running to process observations
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#### 🔥🔥🔥🔥🔥 CRITICAL BUG #1: Fragile String Parsing (Line 75)
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```typescript
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const isRunning = output.includes("claude-mem-worker") && output.includes("online");
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```
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**THE PROBLEM**: This checks if BOTH strings exist ANYWHERE in the output. This is WRONG.
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**Counter-Example**:
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```
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PM2 Process List:
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┌─────┬────────────────────┬─────────┐
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│ id │ name │ status │
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├─────┼────────────────────┼─────────┤
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│ 0 │ claude-mem-worker │ stopped │
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│ 1 │ some-other-app │ online │
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└─────┴────────────────────┴─────────┘
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```
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This would return `true` because output contains "claude-mem-worker" AND "online", even though the worker is STOPPED!
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**Impact**:
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- False positive: Worker is stopped, but code thinks it's running
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- Result: Skip starting worker (line 77 `if (!isRunning)`), wait for health
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- Health check fails because worker isn't actually running
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- Entire function fails with "Worker failed to become healthy"
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- User sees cryptic error instead of "Worker is stopped, restarting..."
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**THE FIX**: Use PM2's JSON output
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```typescript
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const result = execSync(`"${pm2Path}" jlist`, { encoding: 'utf8' });
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const processes = JSON.parse(result);
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const worker = processes.find(p => p.name === 'claude-mem-worker');
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const isRunning = worker?.pm2_env?.status === 'online';
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```
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#### 🔥🔥🔥🔥🔥 CRITICAL BUG #2: Silent Error Handling (Lines 65-72)
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```typescript
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await new Promise<void>((resolve, reject) => {
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checkProcess.on("error", (error) => reject(error));
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checkProcess.on("close", (code) => {
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// PM2 list can fail, but we should still continue - just assume worker isn't running
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// This handles cases where PM2 isn't installed yet
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resolve(); // ← ALWAYS RESOLVES, NEVER REJECTS
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});
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});
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```
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**THE PROBLEM**:
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1. If PM2 isn't installed, `pm2 list` fails
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2. Line 70: ALWAYS resolves, ignoring the failure
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3. `output` is empty string
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4. Line 75: `isRunning = false` (correct by accident)
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5. Line 77-94: Try to START the worker... which will ALSO fail because PM2 isn't installed
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6. Line 85-93: THIS finally rejects with error
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**Why This Is Terrible**:
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- Defers error detection to the start command instead of failing fast
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- Confusing error message: "PM2 start command failed" instead of "PM2 not found - run npm install"
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- User wastes time waiting for PM2 list to fail, then waiting for PM2 start to fail
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- The comment is a LIE: "we should still continue" - no, we shouldn't! If PM2 isn't installed, FAIL IMMEDIATELY.
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**THE FIX**: Fail fast
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```typescript
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await new Promise<void>((resolve, reject) => {
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checkProcess.on("error", reject);
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checkProcess.on("close", (code) => {
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if (code !== 0 && code !== null) {
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reject(new Error(`PM2 not found - install dependencies first (npm install)`));
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}
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resolve();
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});
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});
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```
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#### 🔥🔥🔥🔥 CRITICAL BUG #3: No Handling for "Running But Unhealthy" (Lines 77-98)
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**THE LOGIC**:
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1. Line 45: Check if worker is healthy → NO (or we would have returned)
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2. Line 54-75: Check if PM2 says worker is running
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3. Line 77: `if (!isRunning)` → start the worker
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4. Line 98: Wait for worker to become healthy
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**THE PROBLEM**: What if PM2 says worker IS running but our health check (line 45) failed?
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**Answer**: We do NOTHING. We skip the `if (!isRunning)` block and jump straight to line 98, waiting for it to become healthy.
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**Why This Is Wrong**: If the worker is started but unhealthy, it won't magically heal itself. It needs to be RESTARTED.
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**Scenarios**:
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- Worker crashed but PM2 hasn't noticed yet → Status: "online", Health: failed → We wait forever
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- Worker is in infinite loop → Status: "online", Health: timeout → We wait forever
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- Worker port is wrong → Status: "online", Health: failed → We wait forever
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**THE FIX**: Restart if unhealthy
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```typescript
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if (!await isWorkerHealthy()) {
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// Not healthy - restart it (PM2 restart is idempotent)
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execSync(`"${pm2Path}" restart "${ecosystemPath}"`);
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if (!await waitForWorkerHealth()) {
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throw new Error("Worker failed to become healthy after restart");
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}
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}
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```
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Or even simpler: Just always restart if health fails. PM2 handles "not started" vs "started" gracefully.
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---
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#### Lines 107-109: `getWorkerPort()` - 🔥🔥🔥🔥🔥 DELETE THIS
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```typescript
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/**
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* Get the worker port number (fixed port)
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*/
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export function getWorkerPort(): number {
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return FIXED_PORT;
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}
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```
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**What**: Returns the FIXED_PORT constant
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**Why**: ???
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**Critique**: 🔥🔥🔥🔥🔥 **TEXTBOOK YAGNI VIOLATION**
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This is the "wrapper function for a constant" anti-pattern from CLAUDE.md.
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**THE PROBLEM**: This function adds ZERO value. It's pure ceremony.
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**Callers should just**:
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```typescript
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import { FIXED_PORT } from './worker-utils.js';
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// Use FIXED_PORT directly
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```
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**Instead of**:
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```typescript
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import { getWorkerPort } from './worker-utils.js';
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const port = getWorkerPort(); // Why???
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```
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**Why This Exists**: Training bias. Code that looks "professional" often includes ceremonial getters for constants. But this is WRONG. Delete it and export the constant.
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**THE FIX**:
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```typescript
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export const WORKER_PORT = parseInt(process.env.CLAUDE_MEM_WORKER_PORT || "37777", 10);
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```
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Then update all callers to use `WORKER_PORT` instead of `getWorkerPort()`.
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---
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### worker-utils.ts COMPLETE REWRITE
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Here's what this file SHOULD be:
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```typescript
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import path from "path";
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import { execSync } from "child_process";
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import { getPackageRoot } from "./paths.js";
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// Configuration
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export const WORKER_PORT = parseInt(process.env.CLAUDE_MEM_WORKER_PORT || "37777", 10);
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const HEALTH_CHECK_TIMEOUT_MS = 100;
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const HEALTH_CHECK_POLL_INTERVAL_MS = 100;
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const HEALTH_CHECK_MAX_WAIT_MS = 10000;
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/**
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* Check if worker is responsive by trying the health endpoint
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*/
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async function isWorkerHealthy(): Promise<boolean> {
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try {
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const response = await fetch(`http://127.0.0.1:${WORKER_PORT}/health`, {
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signal: AbortSignal.timeout(HEALTH_CHECK_TIMEOUT_MS)
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});
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return response.ok;
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} catch {
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return false;
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}
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}
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/**
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* Wait for worker to become healthy, polling every 100ms
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*/
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async function waitForWorkerHealth(): Promise<boolean> {
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const start = Date.now();
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while (Date.now() - start < HEALTH_CHECK_MAX_WAIT_MS) {
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if (await isWorkerHealthy()) return true;
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await new Promise(resolve => setTimeout(resolve, HEALTH_CHECK_POLL_INTERVAL_MS));
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}
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return false;
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}
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/**
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* Ensure worker service is running and healthy
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* Restarts worker if not healthy (PM2 restart is idempotent)
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*/
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export async function ensureWorkerRunning(): Promise<void> {
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if (await isWorkerHealthy()) return;
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const packageRoot = getPackageRoot();
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const pm2Path = path.join(packageRoot, "node_modules", ".bin", "pm2");
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const ecosystemPath = path.join(packageRoot, "ecosystem.config.cjs");
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// PM2 restart is idempotent - handles both "not started" and "started but broken"
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try {
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const result = execSync(`"${pm2Path}" restart "${ecosystemPath}"`, {
|
|
cwd: packageRoot,
|
|
encoding: 'utf8',
|
|
stdio: 'pipe'
|
|
});
|
|
|
|
if (!await waitForWorkerHealth()) {
|
|
throw new Error(`Worker failed to become healthy. PM2 output:\n${result}`);
|
|
}
|
|
} catch (error: any) {
|
|
if (error.code === 'ENOENT' || error.message.includes('not found')) {
|
|
throw new Error('PM2 not found - run: npm install');
|
|
}
|
|
throw error;
|
|
}
|
|
}
|
|
```
|
|
|
|
**Line Count**: 43 lines (vs 110 original)
|
|
**Complexity**: 1/3 of original
|
|
**Bugs Fixed**: All of them
|
|
**Ceremony Removed**: All of it
|
|
|
|
**What Changed**:
|
|
1. Removed `getWorkerPort()` wrapper - export constant directly
|
|
2. Removed PM2 status checking - just restart if unhealthy
|
|
3. Removed string parsing - use PM2's idempotent restart
|
|
4. Removed silent error handling - fail fast on PM2 not found
|
|
5. Named all magic numbers as constants
|
|
6. Simplified to: "Unhealthy? Restart. Wait for health. Done."
|
|
|
|
---
|
|
|
|
## worker-service.ts Analysis
|
|
|
|
### Overall Structure
|
|
|
|
**Lines 1-24**: Imports and constants ✅
|
|
**Lines 27-65**: `findClaudePath()` ✅ Excellent
|
|
**Lines 67-96**: Type definitions ✅
|
|
**Lines 98-1228**: WorkerService class
|
|
|
|
### Critical Issues in worker-service.ts
|
|
|
|
#### 🔥🔥🔥🔥🔥 ISSUE #1: Massive Code Duplication (Lines 754-844)
|
|
|
|
**THE PROBLEM**: Session auto-creation logic is COPIED THREE TIMES:
|
|
1. `handleInit()` (lines 663-733)
|
|
2. `handleObservation()` (lines 754-785)
|
|
3. `handleSummarize()` (lines 813-844)
|
|
|
|
**The Duplicated Code** (20+ lines per copy):
|
|
```typescript
|
|
let session = this.sessions.get(sessionDbId);
|
|
if (!session) {
|
|
const db = new SessionStore();
|
|
const dbSession = db.getSessionById(sessionDbId);
|
|
db.close();
|
|
|
|
session = {
|
|
sessionDbId,
|
|
claudeSessionId: dbSession!.claude_session_id,
|
|
sdkSessionId: null,
|
|
project: dbSession!.project,
|
|
userPrompt: dbSession!.user_prompt,
|
|
pendingMessages: [],
|
|
abortController: new AbortController(),
|
|
generatorPromise: null,
|
|
lastPromptNumber: 0,
|
|
startTime: Date.now()
|
|
};
|
|
this.sessions.set(sessionDbId, session);
|
|
|
|
session.generatorPromise = this.runSDKAgent(session).catch(err => {
|
|
logger.failure('WORKER', 'SDK agent error', { sessionId: sessionDbId }, err);
|
|
const db = new SessionStore();
|
|
db.markSessionFailed(sessionDbId);
|
|
db.close();
|
|
this.sessions.delete(sessionDbId);
|
|
});
|
|
}
|
|
```
|
|
|
|
**Impact**: 60+ lines of duplicated code across 3 functions
|
|
|
|
**THE FIX**: Extract to helper method
|
|
```typescript
|
|
private getOrCreateSession(sessionDbId: number): ActiveSession {
|
|
let session = this.sessions.get(sessionDbId);
|
|
if (session) return session;
|
|
|
|
const db = new SessionStore();
|
|
const dbSession = db.getSessionById(sessionDbId);
|
|
if (!dbSession) {
|
|
db.close();
|
|
throw new Error(`Session ${sessionDbId} not found in database`);
|
|
}
|
|
|
|
session = {
|
|
sessionDbId,
|
|
claudeSessionId: dbSession.claude_session_id,
|
|
sdkSessionId: null,
|
|
project: dbSession.project,
|
|
userPrompt: dbSession.user_prompt,
|
|
pendingMessages: [],
|
|
abortController: new AbortController(),
|
|
generatorPromise: null,
|
|
lastPromptNumber: 0,
|
|
startTime: Date.now()
|
|
};
|
|
|
|
this.sessions.set(sessionDbId, session);
|
|
|
|
// Start SDK agent in background
|
|
session.generatorPromise = this.runSDKAgent(session).catch(err => {
|
|
logger.failure('WORKER', 'SDK agent error', { sessionId: sessionDbId }, err);
|
|
const db = new SessionStore();
|
|
db.markSessionFailed(sessionDbId);
|
|
db.close();
|
|
this.sessions.delete(sessionDbId);
|
|
});
|
|
|
|
db.close();
|
|
return session;
|
|
}
|
|
```
|
|
|
|
Then all three functions become:
|
|
```typescript
|
|
private handleObservation(req: Request, res: Response): void {
|
|
const sessionDbId = parseInt(req.params.sessionDbId, 10);
|
|
const { tool_name, tool_input, tool_output, prompt_number } = req.body;
|
|
|
|
const session = this.getOrCreateSession(sessionDbId);
|
|
|
|
session.pendingMessages.push({
|
|
type: 'observation',
|
|
tool_name,
|
|
tool_input,
|
|
tool_output,
|
|
prompt_number
|
|
});
|
|
|
|
res.json({ status: 'queued', queueLength: session.pendingMessages.length });
|
|
}
|
|
```
|
|
|
|
**Savings**: Remove 60 lines, improve maintainability 10x
|
|
|
|
---
|
|
|
|
#### 🔥🔥 ISSUE #2: Magic Numbers Throughout
|
|
|
|
**Line 316**: `setTimeout(() => { ... }, 1500);` - Why 1500ms debounce?
|
|
**Line 997**: `setTimeout(resolve, 100)` - Why 100ms polling?
|
|
**Line 343**: `const version = process.env.npm_package_version || '5.0.3';` - Hardcoded fallback
|
|
**Line 109**: `express.json({ limit: '50mb' })` - Why 50mb?
|
|
|
|
**THE FIX**: Named constants
|
|
```typescript
|
|
const SPINNER_DEBOUNCE_MS = 200; // Debounce spinner to prevent flicker
|
|
const MESSAGE_POLL_INTERVAL_MS = 100; // Check for new messages every 100ms
|
|
const MAX_REQUEST_SIZE = '50mb'; // Allow large tool outputs
|
|
```
|
|
|
|
---
|
|
|
|
#### 🔥🔥 ISSUE #3: Configuration Duplication
|
|
|
|
Default values appear in multiple places:
|
|
- Line 377-380: Default settings in GET handler
|
|
- Line 22: MODEL default
|
|
- Throughout: Port defaults, observation count defaults
|
|
|
|
**THE FIX**: Centralize
|
|
```typescript
|
|
export const DEFAULT_CONFIG = {
|
|
MODEL: 'claude-haiku-4-5',
|
|
CONTEXT_OBSERVATIONS: 50,
|
|
WORKER_PORT: 37777,
|
|
VALID_MODELS: ['claude-haiku-4-5', 'claude-sonnet-4-5', 'claude-opus-4'],
|
|
MAX_CONTEXT_OBSERVATIONS: 200,
|
|
MIN_PORT: 1024,
|
|
MAX_PORT: 65535
|
|
} as const;
|
|
```
|
|
|
|
---
|
|
|
|
#### 🔥 ISSUE #4: Hardcoded Model Validation (Line 407)
|
|
|
|
```typescript
|
|
const validModels = ['claude-haiku-4-5', 'claude-sonnet-4-5', 'claude-opus-4'];
|
|
```
|
|
|
|
**THE PROBLEM**: This list will get stale when new models are released.
|
|
|
|
**YAGNI QUESTION**: Do we even need to validate? The SDK will error if model doesn't exist.
|
|
|
|
**ANSWER**: Better error messages for users. But this should be a WARNING, not a blocker.
|
|
|
|
**THE FIX**: Remove validation or make it advisory
|
|
```typescript
|
|
// Let SDK handle validation - it knows the current model list
|
|
// We don't need to duplicate that logic here
|
|
if (CLAUDE_MEM_MODEL) {
|
|
settings.env.CLAUDE_MEM_MODEL = CLAUDE_MEM_MODEL;
|
|
logger.info('WORKER', `Model changed to ${CLAUDE_MEM_MODEL}`, {});
|
|
}
|
|
```
|
|
|
|
---
|
|
|
|
### What worker-service.ts Does RIGHT ✅
|
|
|
|
#### 1. Excellent Error Handling Priority
|
|
```typescript
|
|
// Store to SQLite FIRST (source of truth)
|
|
const { id, createdAtEpoch } = db.storeObservation(...);
|
|
|
|
// Broadcast to SSE (real-time UI updates)
|
|
this.broadcastSSE({ type: 'new_observation', ... });
|
|
|
|
// Sync to Chroma ASYNC (fire-and-forget, non-critical)
|
|
this.chromaSync.syncObservation(...)
|
|
.catch((error: Error) => {
|
|
logger.error('...continuing', ...);
|
|
// Don't crash - SQLite has the data
|
|
});
|
|
```
|
|
|
|
**Priority**: SQLite > SSE > Chroma
|
|
**Philosophy**: Write to source of truth first, update UI second, sync to vector DB last. Chroma failures don't crash the worker.
|
|
|
|
#### 2. Clean Pagination APIs
|
|
|
|
All data endpoints follow consistent pattern:
|
|
- Parse `offset`, `limit`, `project` from query params
|
|
- Cap limit at 100 to prevent abuse
|
|
- Return `{ items, hasMore, total, offset, limit }`
|
|
- Use parameterized queries (SQL injection safe)
|
|
|
|
Example: `handleGetObservations()` (lines 467-515) is textbook good API design.
|
|
|
|
#### 3. Proper Async Generator Pattern
|
|
|
|
`createMessageGenerator()` (lines 969-1060) is an excellent implementation:
|
|
- Yields init prompt immediately
|
|
- Polls message queue with proper abort signal handling
|
|
- No busy-waiting (100ms sleep between polls)
|
|
- Clean message type discrimination
|
|
- Proper error propagation
|
|
|
|
#### 4. Defensive SSE Cleanup
|
|
|
|
`broadcastSSE()` (lines 250-275):
|
|
- Early return if no clients (optimization)
|
|
- Two-phase cleanup (collect failures, then remove)
|
|
- Doesn't modify Set during iteration
|
|
- Handles disconnected clients gracefully
|
|
|
|
This is GOOD defensive programming, not YAGNI violation.
|
|
|
|
---
|
|
|
|
## Severity-Ranked YAGNI Violations
|
|
|
|
### 🔥🔥🔥🔥🔥 SEVERITY 5: CRITICAL - FIX IMMEDIATELY
|
|
|
|
| Issue | File | Lines | Problem | Impact |
|
|
|-------|------|-------|---------|--------|
|
|
| Fragile string parsing | worker-utils | 75 | `output.includes("claude-mem-worker") && output.includes("online")` | False positives cause failures |
|
|
| Session auto-creation duplication | worker-service | 754-844 | 60+ lines copied 3 times | Maintenance nightmare |
|
|
| Silent PM2 error handling | worker-utils | 70 | Always resolves, defers errors | Confusing error messages |
|
|
|
|
### 🔥🔥🔥🔥 SEVERITY 4: MAJOR - FIX SOON
|
|
|
|
| Issue | File | Lines | Problem | Impact |
|
|
|-------|------|-------|---------|--------|
|
|
| No "running but unhealthy" handling | worker-utils | 77-98 | Skip restart if PM2 says running | Worker never recovers |
|
|
| Useless getWorkerPort() wrapper | worker-utils | 107-109 | Ceremony for a constant | Code bloat |
|
|
|
|
### 🔥🔥🔥 SEVERITY 3: MODERATE - FIX WHEN CONVENIENT
|
|
|
|
| Issue | File | Lines | Problem | Impact |
|
|
|-------|------|-------|---------|--------|
|
|
| 1500ms debounce too long | worker-service | 316 | Should be 100-200ms | Spinner lags |
|
|
| Hardcoded model validation | worker-service | 407 | List will get stale | Blocks valid models |
|
|
| Hardcoded fallback version | worker-service | 343 | '5.0.3' will get stale | Wrong stats |
|
|
|
|
### 🔥🔥 SEVERITY 2: MINOR - CLEANUP
|
|
|
|
| Issue | File | Lines | Problem | Impact |
|
|
|-------|------|-------|---------|--------|
|
|
| Magic numbers everywhere | Both | Multiple | 100, 1000, 1500, etc | Hard to maintain |
|
|
| Duplicated default configs | worker-service | Multiple | Defaults in many places | Inconsistency risk |
|
|
| Unnecessary this.port | worker-service | 100 | Should use FIXED_PORT | Confusion |
|
|
|
|
---
|
|
|
|
## Recommended Action Plan
|
|
|
|
### Phase 1: Critical Fixes (Do Today)
|
|
|
|
1. **Fix worker-utils.ts completely** - Use the rewrite provided above (43 lines)
|
|
- Remove getWorkerPort()
|
|
- Fix PM2 string parsing → use `pm2 restart` (idempotent)
|
|
- Remove silent error handling
|
|
- Named constants for all timeouts
|
|
|
|
2. **Extract getOrCreateSession()** in worker-service.ts
|
|
- Remove 60 lines of duplication
|
|
- Update handleInit, handleObservation, handleSummarize
|
|
|
|
### Phase 2: Cleanup (Do This Week)
|
|
|
|
3. **Centralize configuration**
|
|
- Create DEFAULT_CONFIG constant
|
|
- Remove duplicated defaults
|
|
- Update all references
|
|
|
|
4. **Fix magic numbers**
|
|
- SPINNER_DEBOUNCE_MS = 200
|
|
- MESSAGE_POLL_INTERVAL_MS = 100
|
|
- HEALTH_CHECK_TIMEOUT_MS = 100
|
|
- etc.
|
|
|
|
5. **Remove hardcoded validations**
|
|
- Model validation (let SDK handle it)
|
|
- Fallback version (read from package.json)
|
|
|
|
### Phase 3: Polish (Do Next Week)
|
|
|
|
6. **Fix minor issues**
|
|
- Remove `this.port` instance variable
|
|
- Update debounce to 200ms
|
|
- Add constants for all magic numbers
|
|
|
|
---
|
|
|
|
## The YAGNI Philosophy Applied
|
|
|
|
### What YAGNI Means Here
|
|
|
|
**You Aren't Gonna Need It**: Don't build infrastructure for problems you don't have.
|
|
|
|
### Examples from This Code
|
|
|
|
#### YAGNI Violation ❌
|
|
```typescript
|
|
export function getWorkerPort(): number {
|
|
return FIXED_PORT; // Wrapper for a constant
|
|
}
|
|
```
|
|
**Why**: Adds zero value. Pure ceremony. Just export the constant.
|
|
|
|
#### YAGNI Compliance ✅
|
|
```typescript
|
|
export const WORKER_PORT = parseInt(...);
|
|
```
|
|
**Why**: Solves the actual need (get port) without ceremony.
|
|
|
|
---
|
|
|
|
#### YAGNI Violation ❌
|
|
```typescript
|
|
// Check PM2 status with string parsing
|
|
const checkProcess = spawn(pm2Path, ["list", "--no-color"]);
|
|
let output = "";
|
|
checkProcess.stdout?.on("data", (data) => { output += data.toString(); });
|
|
// ... 30 lines of promise wrappers and parsing ...
|
|
const isRunning = output.includes("claude-mem-worker") && output.includes("online");
|
|
|
|
if (!isRunning) {
|
|
// Start worker
|
|
}
|
|
// But what if it's running AND unhealthy? Do nothing!
|
|
```
|
|
**Why**: Solving a problem that doesn't exist. PM2 restart is idempotent - it handles both "not started" and "started but broken". We don't need to distinguish.
|
|
|
|
#### YAGNI Compliance ✅
|
|
```typescript
|
|
if (!await isWorkerHealthy()) {
|
|
execSync(`pm2 restart ecosystem.config.cjs`);
|
|
await waitForWorkerHealth();
|
|
}
|
|
```
|
|
**Why**: Solves the actual problem (ensure worker is healthy) in the simplest way.
|
|
|
|
---
|
|
|
|
### The Pattern
|
|
|
|
**YAGNI Violations Follow This Pattern**:
|
|
1. Imagine a scenario ("what if PM2 isn't installed?")
|
|
2. Write defensive code for the scenario (silent error handling)
|
|
3. Defer the error to a later point
|
|
4. Make the actual error message worse
|
|
|
|
**YAGNI Compliance Follows This Pattern**:
|
|
1. Write the obvious solution (check health, restart if unhealthy)
|
|
2. Let errors propagate naturally
|
|
3. Add error handling only where actually needed
|
|
4. Keep error messages clear and direct
|
|
|
|
---
|
|
|
|
## Conclusion
|
|
|
|
### Overall Assessment
|
|
|
|
**worker-utils.ts**: 🔥🔥🔥🔥 2/5 - Needs complete rewrite
|
|
**worker-service.ts**: ✅✅✅✅🔥 4/5 - Mostly excellent, fix duplication
|
|
|
|
### The Good
|
|
|
|
- worker-service.ts has excellent architecture (SQLite > SSE > Chroma priority)
|
|
- Clean pagination APIs with proper parameterization
|
|
- Good async generator pattern for SDK streaming
|
|
- Proper SSE client management with defensive cleanup
|
|
- Non-blocking Chroma sync with graceful failures
|
|
|
|
### The Bad
|
|
|
|
- worker-utils.ts has 3 critical bugs (string parsing, silent errors, missing restart)
|
|
- 60+ lines of duplicated session auto-creation code
|
|
- Magic numbers everywhere without named constants
|
|
- Hardcoded defaults in multiple locations
|
|
|
|
### The Ugly
|
|
|
|
- `getWorkerPort()` is pure ceremony - delete it
|
|
- 1500ms debounce is 10x too long
|
|
- PM2 string parsing is fragile and will break
|
|
- Silent error handling makes debugging impossible
|
|
|
|
### Time to Fix
|
|
|
|
- Critical fixes (worker-utils rewrite + extract getOrCreateSession): **2 hours**
|
|
- Cleanup (centralize config, fix magic numbers): **2 hours**
|
|
- Polish (minor issues): **1 hour**
|
|
|
|
**Total**: 5 hours to bring codebase from 80% to 95% quality.
|
|
|
|
### Final Verdict
|
|
|
|
This code is **80% excellent, 20% disaster**. The disaster is concentrated in worker-utils.ts (which is called on EVERY session start) and the session auto-creation duplication (which makes maintenance painful). Fix these two issues and you have a rock-solid codebase.
|
|
|
|
The worker-service.ts architecture is actually brilliant - the prioritization of SQLite > SSE > Chroma is exactly right, and the async generator pattern for SDK streaming is textbook perfect. Don't let the duplication overshadow the good design.
|
|
|
|
**Recommendation**: Fix worker-utils.ts TODAY (it has production bugs), extract getOrCreateSession() THIS WEEK (it's painful to maintain), and clean up the rest NEXT WEEK.
|