fix(core): Improve loop detection for longer repeating patterns (#12505)

packages/core/src/services/loopDetectionService.ts

@@ -28,7 +28,7 @@ import { debugLogger } from '../utils/debugLogger.js';
 const TOOL_CALL_LOOP_THRESHOLD = 5;
 const CONTENT_LOOP_THRESHOLD = 10;
 const CONTENT_CHUNK_SIZE = 50;
-const MAX_HISTORY_LENGTH = 1000;
+const MAX_HISTORY_LENGTH = 5000;
 
 /**
  * The number of recent conversation turns to include in the history when asking the LLM to check for a loop.
@@ -328,7 +328,7 @@ export class LoopDetectionService {
    * 2. Verify actual content matches to prevent hash collisions
    * 3. Track all positions where this chunk appears
    * 4. A loop is detected when the same chunk appears CONTENT_LOOP_THRESHOLD times
-   *    within a small average distance (≤ 1.5 * chunk size)
+   *    within a small average distance (≤ 5 * chunk size)
    */
   private isLoopDetectedForChunk(chunk: string, hash: string): boolean {
     const existingIndices = this.contentStats.get(hash);
@@ -353,7 +353,7 @@ export class LoopDetectionService {
     const totalDistance =
       recentIndices[recentIndices.length - 1] - recentIndices[0];
     const averageDistance = totalDistance / (CONTENT_LOOP_THRESHOLD - 1);
-    const maxAllowedDistance = CONTENT_CHUNK_SIZE * 1.5;
+    const maxAllowedDistance = CONTENT_CHUNK_SIZE * 5;
 
     return averageDistance <= maxAllowedDistance;
   }