fix(dev-monitor): fix dedup flush causing duplicate entries

- Reset dedup count after flushing to prevent re-writing same entries
- Add console.warn logs for initialization visibility
- Fixes issue where 16k+ duplicate entries were written

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: fazxes

apps/agent/src/dev-monitor/dedup.ts

@@ -163,13 +163,17 @@ function flushDedupEntry(dedup: DedupEntry): DevLogEntry {
  * Flush all pending dedup entries with counts > 1.
  *
  * Call on shutdown or periodic flush to ensure counts are written.
+ * After flushing, resets the count to 1 so entries aren't re-flushed.
  */
 export function flushAllDedup(): DevLogEntry[] {
   const entries: DevLogEntry[] = [];
 
   for (const dedup of dedupMap.values()) {
     if (dedup.count > 1) {
       entries.push(flushDedupEntry(dedup));
+      // Reset count so we don't flush the same summary again
+      dedup.count = 1;
+      dedup.firstSeen = dedup.lastSeen;
     }
   }
 

apps/agent/src/dev-monitor/index.ts

@@ -78,6 +78,8 @@ export async function initDevMonitor(options?: InitOptions): Promise<void> {
   // Production: do nothing (tree-shaken)
   if (import.meta.env.PROD) return;
 
+  console.warn('[DevMonitor] Starting initialization...');
+
   try {
     // Dynamic import only happens in dev
     const { devTrace, init } = await import('./dev-trace');
@@ -87,6 +89,8 @@ export async function initDevMonitor(options?: InitOptions): Promise<void> {
 
     // Initialize auto-capture, storage, etc.
     await init(options);
+
+    console.warn('[DevMonitor] ✓ Ready - trace methods are now active');
   } catch (err: unknown) {
     // Init failed - stay on noop, log error
     console.error('[DevMonitor] Initialization failed:', err);

apps/agent/src/dev-monitor/storage.ts

@@ -63,6 +63,10 @@ export async function initStorage(options: InitOptions = {}): Promise<void> {
     }, config.flushInterval);
 
     initialized = true;
+
+    // Log success to console so user knows it's working
+    const outputPath = workspacePath ? `${workspacePath}/${config.outputDir}` : '(no workspace)';
+    console.warn(`[DevMonitor] ✓ Initialized - output: ${outputPath}`);
   } catch (err: unknown) {
     console.error('[DevMonitor] Storage init failed:', err);
   }