add anthropic_configured flag to /healthz

server/app/main.py

@@ -7,6 +7,7 @@ Routes:
 """
 
 import logging
+import os
 from pathlib import Path
 
 from fastapi import FastAPI
@@ -27,8 +28,16 @@ WEB_DIR = Path(__file__).parent / "web"
 
 
 @app.get("/healthz")
-def healthz() -> dict[str, str]:
-    return {"status": "ok"}
+def healthz() -> dict[str, object]:
+    """Liveness + config probe.
+
+    `anthropic_configured` reports whether the ANTHROPIC_API_KEY secret is set
+    (the coaching layer needs it) — without ever exposing the key's value.
+    """
+    return {
+        "status": "ok",
+        "anthropic_configured": bool(os.environ.get("ANTHROPIC_API_KEY")),
+    }
 
 
 @app.get("/")