Hardcode agent stale timeout

app/services/config_service.py

@@ -13,7 +13,6 @@ from app.models import ConfigResponse
 
 logger = logging.getLogger(__name__)
 
-_SETTING_KEYS = {"default_wait_seconds", "default_empty_response", "agent_stale_after_seconds"}
 def get_config() -> ConfigResponse:
     with get_conn() as conn:
         rows = conn.execute("SELECT key, value FROM settings").fetchall()
@@ -21,22 +20,18 @@ def get_config() -> ConfigResponse:
     return ConfigResponse(
         default_wait_seconds=int(data.get("default_wait_seconds", 10)),
         default_empty_response=data.get("default_empty_response") or DEFAULT_EMPTY_RESPONSE,
-        agent_stale_after_seconds=int(data.get("agent_stale_after_seconds", 30)),
     )
 
 
 def update_config(
     default_wait_seconds: int | None = None,
     default_empty_response: str | None = None,
-    agent_stale_after_seconds: int | None = None,
 ) -> ConfigResponse:
     updates: dict[str, str] = {}
     if default_wait_seconds is not None:
         updates["default_wait_seconds"] = str(default_wait_seconds)
     if default_empty_response is not None:
         updates["default_empty_response"] = default_empty_response
-    if agent_stale_after_seconds is not None:
-        updates["agent_stale_after_seconds"] = str(agent_stale_after_seconds)
 
     if updates:
         with get_write_conn() as conn:

app/services/status_service.py

@@ -10,6 +10,7 @@ import sqlite3
 from datetime import datetime, timezone
 from typing import Optional
 
+from app.config import AGENT_STALE_AFTER_SECONDS
 from app.database import get_conn, get_write_conn
 
 logger = logging.getLogger(__name__)
@@ -55,25 +56,15 @@ def get_latest_agent_activity() -> Optional[sqlite3.Row]:
         ).fetchone()
 
 
-def get_agent_stale_seconds() -> int:
-    """Read agent_stale_after_seconds from settings table."""
-    with get_conn() as conn:
-        row = conn.execute(
-            "SELECT value FROM settings WHERE key = 'agent_stale_after_seconds'"
-        ).fetchone()
-    return int(row["value"]) if row else 30
-
-
 def is_agent_connected() -> bool:
     """True if the most recent agent activity is within the stale threshold."""
     row = get_latest_agent_activity()
     if row is None:
         return False
-    stale_seconds = get_agent_stale_seconds()
     last_seen = datetime.fromisoformat(row["last_seen_at"])
     now = datetime.now(timezone.utc)
     if last_seen.tzinfo is None:
         last_seen = last_seen.replace(tzinfo=timezone.utc)
     delta = (now - last_seen).total_seconds()
-    return delta <= stale_seconds
+    return delta <= AGENT_STALE_AFTER_SECONDS