chore(telemetry): jack up MAX_TOOL_ROUNDS to 150 for ultimate custom app-building runway

vibn-frontend/app/api/chat/route.ts

@@ -821,6 +821,7 @@ export async function POST(request: Request) {
         isConversational(message.trim());
 
       let lastVerifySig: string | null = null;
+      let lastRoundToolSig: string | null = null;
       let fileHashes = new Map<string, string>();
       let stallRounds = 0;
 
@@ -996,7 +997,25 @@ export async function POST(request: Request) {
           // 1. Compute verify signature
           const verifySig = getRoundVerifySignature(currentRoundResults);
 
-          // 2. Check for actual state progress (did files change, did a plan update, did a mutating tool succeed, or did the error set change?)
+          // 2. Compute deterministic tool signature to track exact repetitions
+          const currentRoundToolSig = resp.toolCalls
+            .map((tc) => {
+              const sortKeys = (obj: any): any => {
+                if (typeof obj !== "object" || obj === null) return obj;
+                if (Array.isArray(obj)) return obj.map(sortKeys);
+                return Object.keys(obj)
+                  .sort()
+                  .reduce((acc, key) => {
+                    acc[key] = sortKeys(obj[key]);
+                    return acc;
+                  }, {} as any);
+              };
+              return `${tc.name}:${JSON.stringify(sortKeys(tc.args || {}))}`;
+            })
+            .sort()
+            .join(";;");
+
+          // 3. Check for actual state progress (did files change, did a plan update, did a mutating tool succeed, or did the error set change?)
           const { progressed, nextHashes } = checkRoundProgress(
             currentRoundResults,
             fileHashes,
@@ -1027,7 +1046,13 @@ export async function POST(request: Request) {
             }
           }
 
-          if (!progressed) {
+          // A stall is ONLY when the AI executes the exact same tools with the exact same inputs without making progress.
+          // If the AI is actively exploring different files, it is allowed to continue.
+          if (
+            !progressed &&
+            lastRoundToolSig &&
+            currentRoundToolSig === lastRoundToolSig
+          ) {
             stallRounds++;
           } else {
             stallRounds = 0;
@@ -1035,9 +1060,11 @@ export async function POST(request: Request) {
 
           if (stallRounds >= 2) {
             loopBreakReason =
-              "Stalled (No file state progress or diagnostic advancement made for 2 rounds)";
+              "Stalled (Repeated the exact same tool calls twice without advancing)";
           }
 
+          lastRoundToolSig = currentRoundToolSig;
+
           if (loopBreakReason) break;
         }