Fix convergence logic and stop button functionality

- Fix convergence: use agentsInRound.length as fallback if agentCount is undefined
- This was causing infinite loops when agentCount wasn't properly initialized
- Simplify convergence check: only schedule next round if !hasConverged
- Add 'stopped' flag to sessions to prevent scheduled rounds from executing
- Modify runRound to check 'stopped' flag and exit early if set
- Modify completeSession to set 'stopped = true' to abort scheduled rounds
- This fixes the issue where stop button wasn't actually stopping the session
- Add better logging for convergence state

backend/src/services/collaborativeOrchestrator.js

@@ -66,6 +66,7 @@ class CollaborativeOrchestrator {
       versionNumber: 0,
       conversationHistory: [],
       started: false,
+      stopped: false, // Flag to stop scheduled rounds
       consecutiveNoChanges: 0, // Counter for convergence
       lastModifiedAgent: null
     })
@@ -145,6 +146,12 @@ class CollaborativeOrchestrator {
       const session = this.activeSessions.get(sessionId)
       if (!session) return
 
+      // Check if session has been stopped
+      if (session.stopped) {
+        console.log(`[Session ${sessionId}] Session is stopped, ignoring runRound call`)
+        return
+      }
+
       const roundNumber = session.conversationHistory.length + 1
       const agentsInRound = session.agents
       const modifiedAgents = []
@@ -272,7 +279,9 @@ class CollaborativeOrchestrator {
         session.consecutiveNoChanges = 0
       }
 
-      console.log(`[Session ${sessionId}] Round ${roundNumber} complete: ${modifiedAgents.length}/${agentsInRound.length} agents modified (consecutive no-change: ${session.consecutiveNoChanges}/${session.agentCount})`)
+      // Ensure agentCount is properly set
+      const agentCountToCheck = session.agentCount || agentsInRound.length
+      console.log(`[Session ${sessionId}] Round ${roundNumber} complete: ${modifiedAgents.length}/${agentsInRound.length} agents modified (consecutive no-change: ${session.consecutiveNoChanges}/${agentCountToCheck})`)
 
       // Save round to DB
       const roundStmt = db.prepare(
@@ -293,7 +302,7 @@ class CollaborativeOrchestrator {
       })
 
       // Broadcast round complete
-      const hasConverged = session.consecutiveNoChanges >= session.agentCount
+      const hasConverged = session.consecutiveNoChanges >= agentCountToCheck
       this.broadcast(sessionId, {
         type: 'round_complete',
         roundNumber,
@@ -303,11 +312,11 @@ class CollaborativeOrchestrator {
       })
 
       // Auto-schedule next round if not converged
-      if (!hasConverged && session.consecutiveNoChanges < session.agentCount) {
+      if (!hasConverged) {
         console.log(`[Session ${sessionId}] Scheduling round ${roundNumber + 1} in 2s...`)
         setTimeout(() => this.runRound(sessionId), 2000)
-      } else if (hasConverged) {
-        console.log(`[Session ${sessionId}] CONVERGED! All ${session.agentCount} agents made no changes in consecutive rounds`)
+      } else {
+        console.log(`[Session ${sessionId}] CONVERGED! All ${agentCountToCheck} agents made no changes in ${session.consecutiveNoChanges} consecutive rounds`)
         // All agents agreed, auto-complete
         setTimeout(() => this.completeSession(sessionId), 2000)
       }
@@ -394,6 +403,7 @@ class CollaborativeOrchestrator {
       const stmt = db.prepare('UPDATE collaborative_sessions SET status = ?, completed_at = CURRENT_TIMESTAMP, final_document = ? WHERE id = ?')
       const session = this.activeSessions.get(sessionId)
       if (session) {
+        session.stopped = true // Stop any scheduled rounds
         stmt.run('completed', session.currentDocument, sessionId)
         console.log(`[Session ${sessionId}] SESSION COMPLETED - Final document: ${session.currentDocument.length} chars, ${session.versionNumber} versions, ${session.conversationHistory.length} rounds`)
       }