fix(batch2): JSONL line buffering, session-idle race guard, ghost watch deferred cleanup

src/status-watcher.js

@@ -82,6 +82,7 @@ class StatusWatcher extends EventEmitter {
       tokenCount: 0,
       children: [],
       idleTimer: null,
+      _lineBuffer: '',
     };
 
     this.sessions.set(sessionKey, state);
@@ -263,12 +264,11 @@ class StatusWatcher extends EventEmitter {
     // Ghost watch: file changed for a completed session — signal immediate re-detection
     if (sessionKey.startsWith('\x00ghost:')) {
       const originalKey = sessionKey.slice(7);
-      // Remove ghost so we don't fire repeatedly
-      this.fileToSession.delete(fullPath);
+      // Do NOT delete ghost entry here — let caller clean up after pollNow confirms the session
       if (this.logger) {
         this.logger.info({ sessionKey: originalKey }, 'fs.watch: file change on completed session — triggering reactivation');
       }
-      this.emit('session-reactivate', originalKey);
+      this.emit('session-reactivate', originalKey, fullPath);
       return;
     }
 
@@ -320,9 +320,11 @@ class StatusWatcher extends EventEmitter {
 
       state.lastOffset += bytesRead;
 
-      // Parse JSONL lines
+      // Parse JSONL lines — handle partial lines at chunk boundary
       const chunk = buffer.toString('utf8', 0, bytesRead);
-      const lines = chunk.split('\n').filter((l) => l.trim());
+      const raw = (state._lineBuffer || '') + chunk;
+      state._lineBuffer = raw.endsWith('\n') ? '' : raw.split('\n').pop();
+      const lines = raw.split('\n').slice(0, raw.endsWith('\n') ? undefined : -1).filter((l) => l.trim());
 
       for (const line of lines) {
         this._parseLine(sessionKey, state, line);
@@ -539,6 +541,17 @@ class StatusWatcher extends EventEmitter {
     const elapsed = Date.now() - state.lastActivityAt;
     const idleMs = this.idleTimeoutS * 1000;
 
+    // Safeguard: if pendingToolCalls is stuck > 0 for more than 30s, clamp to 0
+    if (state.pendingToolCalls > 0 && elapsed > 30000) {
+      if (this.logger) {
+        this.logger.warn(
+          { sessionKey, pendingToolCalls: state.pendingToolCalls, elapsedS: Math.floor(elapsed / 1000) },
+          '_checkIdle: pendingToolCalls stuck > 30s — clamping to 0 to unblock idle detection',
+        );
+      }
+      state.pendingToolCalls = 0;
+    }
+
     if (elapsed >= idleMs && state.pendingToolCalls === 0) {
       if (this.logger) {
         this.logger.info({ sessionKey, elapsedS: Math.floor(elapsed / 1000) }, 'Session idle');

src/watcher-manager.js

@@ -396,11 +396,13 @@ async function startDaemon() {
   // ---- Ghost reactivation (from watcher fs.watch on completed session file) ----
   // Fires immediately when the transcript file changes after a session completes.
   // Clears the completedSessions cooldown so the next monitor poll re-detects instantly.
-  watcher.on('session-reactivate', (sessionKey) => {
+  watcher.on('session-reactivate', (sessionKey, ghostPath) => {
     logger.info({ sessionKey }, 'Ghost watch triggered reactivation — clearing completed cooldown');
     monitor.clearCompleted(sessionKey);
     // Force an immediate poll so the session is re-added without waiting 2s
     monitor.pollNow();
+    // Clean up ghost entry now — clearCompleted+pollNow is sufficient, ghost served its purpose
+    if (ghostPath) watcher.fileToSession.delete(ghostPath);
   });
 
   // ---- Lock file reactivation (earliest possible trigger) ----