feat: ConnectAI structural hardening and retrieval precision improvements

src/retrieval/contextBudget.ts

@@ -52,12 +52,16 @@ export function selectWithinBudget(
     // 1. Sort by score descending
     const sorted = [...chunks].sort((a, b) => b.score - a.score);
 
-    // 2. Deduplicate by filePath
-    const seen = new Set<string>();
-    const deduped = sorted.filter((chunk) => {
+    // 2. [Structural Fix] 파일당 청크 수 제한 완화 (Deduplication -> Multi-context)
+    const fileChunkCounts = new Map<string, number>();
+    const filtered = sorted.filter((chunk) => {
         const key = chunk.metadata.filePath || chunk.id;
-        if (seen.has(key)) return false;
-        seen.add(key);
+        const count = fileChunkCounts.get(key) || 0;
+        
+        // 파일당 최대 3개까지의 주요 맥락 허용 (정보 유실 방지)
+        if (count >= 3) return false;
+        
+        fileChunkCounts.set(key, count + 1);
         return true;
     });
 
@@ -66,7 +70,7 @@ export function selectWithinBudget(
     const dropped: RetrievalChunk[] = [];
     let tokensUsed = 0;
 
-    for (const chunk of deduped) {
+    for (const chunk of filtered) {
         const chunkTokens = chunk.tokenEstimate || estimateTokens(chunk.content);
 
         if (selected.length >= cfg.maxChunks) {