fix(agents): give agents executable curl instructions + shared base URL helper

backend/app/core/urls.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+
+def public_api_base_url() -> str:
+    """Return a LAN-reachable base URL for the Mission Control API.
+
+    Priority:
+    1) MISSION_CONTROL_BASE_URL env var (recommended)
+    2) First non-loopback IPv4 from `hostname -I`
+
+    Never returns localhost because agents may run on another machine.
+    """
+
+    import os
+    import re
+    import subprocess
+
+    explicit = os.environ.get("MISSION_CONTROL_BASE_URL")
+    if explicit:
+        return explicit.rstrip("/")
+
+    try:
+        out = subprocess.check_output(["bash", "-lc", "hostname -I"], text=True).strip()
+        ips = re.findall(r"\b(?:\d{1,3}\.){3}\d{1,3}\b", out)
+        for ip in ips:
+            if ip.startswith("127."):
+                continue
+            if ip.startswith("172.17."):
+                continue
+            if ip.startswith(("192.168.", "10.", "172.")):
+                return f"http://{ip}:8000"
+    except Exception:
+        pass
+
+    return "http://<dev-machine-ip>:8000"