feat(relay): add subagent spawn, thread tools, and container box client

- Upgrade exec-constrained.py with subagent.spawn, thread.list, thread.view, pipeline.run ops
- Grant full ops permissions to all fleet agent identities (646, pip, muse, opm)
- Implement bin/box-relay.sh zero-dependency client supporting bearer and SSH signature auth
- Add fast hybrid gateway path to dm.py for sub-2s verified deliveries
- Fix wait=0 handling in super-cli.py subagent deployments
- Add hourly check-in jobs and scheduler for 646, pip, muse
- Document agent tooling and relay APIs in docs/AGENT-TOOLING.md

bin/muse_hybrid.py

@@ -24,7 +24,7 @@ def is_node_configured(node):
     conf_dir = Path.home() / ".config" / "muse-cli" / node
     return (conf_dir / "cookies.txt").exists()
 
-def run_muse_cli(node, args, timeout=30):
+def run_muse_cli(node, args, timeout=60):
     cmd = [str(MUSE_CLI_NODE), node] + args
     res = subprocess.run(cmd, capture_output=True, text=True, timeout=timeout)
     return res.returncode, res.stdout, res.stderr
@@ -40,6 +40,20 @@ def get_threads(node):
     except Exception as e:
         return None, f"JSON parse error: {e}"
 
+def start_session(node, title=None):
+    """Start a new session/subagent via fast gateway. Returns (dict, error_str)."""
+    args = ["session-start"]
+    if title:
+        args.extend(["--title", title])
+    rc, stdout, stderr = run_muse_cli(node, args)
+    if rc != 0:
+        return None, stderr or stdout
+    try:
+        data = json.loads(stdout)
+        return data, None
+    except Exception as e:
+        return None, f"JSON parse error: {e}"
+
 def get_history(node, thread_id=None, limit=15):
     """Retrieve message history via fast gateway. Returns (history_list, error_str)."""
     args = ["history", "--limit", str(limit)]
@@ -59,10 +73,9 @@ def send_message(node, text, thread_id=None, wait=0):
     args = ["send"]
     if thread_id and thread_id != "main":
         args.extend(["--thread", str(thread_id)])
-    if wait > 0:
-        args.extend(["--wait", str(wait)])
+    args.extend(["--wait", str(wait)])
     args.append(text)
-    rc, stdout, stderr = run_muse_cli(node, args, timeout=max(30, wait + 15))
+    rc, stdout, stderr = run_muse_cli(node, args, timeout=max(60, wait + 30))
     if rc != 0:
         return None, stderr or stdout
     try: