Initial clean commit - unified Lyra stack

cortex/rag.py

@@ -0,0 +1,32 @@
+import os, requests
+from typing import Dict, Any, List
+
+RAG_API_URL = os.getenv("RAG_API_URL", "http://localhost:7090")
+
+def query_rag(query: str, where: Dict[str, Any] | None = None, k: int = 6) -> Dict[str, Any]:
+    payload = {"query": query, "k": k}
+    if where:
+        payload["where"] = where
+    try:
+        r = requests.post(f"{RAG_API_URL}/rag/search", json=payload, timeout=8)
+        r.raise_for_status()
+        data = r.json() or {}
+    except Exception as e:
+        data = {"answer": "", "chunks": [], "error": str(e)}
+    return data
+
+def format_rag_block(result: Dict[str, Any]) -> str:
+    answer = (result.get("answer") or "").strip()
+    chunks: List[Dict[str, Any]] = result.get("chunks") or []
+    lines = ["[RAG]"]
+    if answer:
+        lines.append(f"Synthesized answer: {answer}")
+    if chunks:
+        lines.append("Top excerpts:")
+        for i, c in enumerate(chunks[:5], 1):
+            src = c.get("metadata", {}).get("source", "unknown")
+            txt = (c.get("text") or "").strip().replace("\n", " ")
+            if len(txt) > 220:
+                txt = txt[:220] + "…"
+            lines.append(f"  {i}. {txt}  — {src}")
+    return "\n".join(lines) + ("\n" if lines else "")