Add quiet loop verification endpoint

app/main.py

@@ -153,6 +153,29 @@ async def test_agent_response(
     }
 
 
+@app.post("/admin/test-loop-inactivity")
+async def test_loop_inactivity(
+    session_id: str = Form(...),
+    inactive_minutes: int = Form(16),
+) -> dict:
+    """Verify the quiet-chat loop records exactly one Hearthkeeper prompt."""
+    if not orchestrator:
+        raise HTTPException(status_code=503, detail="Orchestrator not initialized")
+
+    result = await orchestrator.run_hearthkeeper_loop_test(
+        session_id=session_id,
+        inactive_minutes=inactive_minutes,
+    )
+    if result.get("reason") == "session_not_found":
+        raise HTTPException(status_code=404, detail="Active session not found")
+
+    return {
+        "status": "passed" if result["passed"] else "failed",
+        "result": result,
+        "timestamp": datetime.utcnow().isoformat(),
+    }
+
+
 @app.get("/admin/ledger")
 async def get_ledger(session_id: str) -> dict:
     """Get the markdown ledger for a session."""