diff --git a/files/launchagent.py b/files/launchagent.py
new file mode 100644
index 0000000..706b3ea
--- /dev/null
+++ b/files/launchagent.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+"""Пишет описание службы launchd для сервера панели: запуск при входе, перезапуск при падении.
+
+  launchagent.py write <plist> <python> <claude_agents.py> <log>
+"""
+import os
+import plistlib
+import sys
+
+LABEL = "com.andrey.claude-agents"  # то же, что SERVICE_LABEL в claude_agents.py
+
+
+def plist(python, script, log):
+    return {
+        "Label": LABEL,
+        "ProgramArguments": [python, script, "--headless"],
+        "RunAtLoad": True,
+        "KeepAlive": True,
+        "StandardOutPath": log,
+        "StandardErrorPath": log,
+    }
+
+
+def main():
+    if len(sys.argv) != 6 or sys.argv[1] != "write":
+        print(__doc__.strip(), file=sys.stderr)
+        sys.exit(2)
+    path, python, script, log = (os.path.expanduser(a) for a in sys.argv[2:])
+    os.makedirs(os.path.dirname(path), exist_ok=True)
+    os.makedirs(os.path.dirname(log), exist_ok=True)
+    tmp = path + ".tmp"
+    with open(tmp, "wb") as f:
+        plistlib.dump(plist(python, script, log), f, fmt=plistlib.FMT_XML)
+    os.replace(tmp, path)
+    print(path)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/test_launchagent.py b/tests/test_launchagent.py
new file mode 100644
index 0000000..5f1a144
--- /dev/null
+++ b/tests/test_launchagent.py
@@ -0,0 +1,49 @@
+import os
+import plistlib
+import subprocess
+import sys
+import tempfile
+import unittest
+
+ROOT = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..")
+sys.path.insert(0, os.path.join(ROOT, "files"))
+import claude_agents  # noqa: E402
+import launchagent  # noqa: E402
+
+SCRIPT = os.path.join(ROOT, "files", "launchagent.py")
+
+
+class Plist(unittest.TestCase):
+    def test_label_matches_server(self):
+        self.assertEqual(launchagent.LABEL, "com.andrey.claude-agents")
+        self.assertEqual(launchagent.LABEL, claude_agents.SERVICE_LABEL)
+
+    def test_plist_shape(self):
+        self.assertEqual(
+            launchagent.plist("/opt/homebrew/bin/python3", "/x/claude_agents.py", "/l/panel.log"),
+            {"Label": "com.andrey.claude-agents",
+             "ProgramArguments": ["/opt/homebrew/bin/python3", "/x/claude_agents.py", "--headless"],
+             "RunAtLoad": True, "KeepAlive": True,
+             "StandardOutPath": "/l/panel.log", "StandardErrorPath": "/l/panel.log"})
+
+
+class Cli(unittest.TestCase):
+    def test_cli_writes_plist_with_spaces(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            target = f"{tmp}/LaunchAgents/a.plist"
+            args = ("/usr/bin/python3", f"{tmp}/Application Support/claude_agents.py",
+                    f"{tmp}/Logs/claude-agents/panel.log")
+            r = subprocess.run([sys.executable, SCRIPT, "write", target, *args],
+                               capture_output=True, text=True)
+            self.assertEqual(r.returncode, 0, r.stderr)
+            with open(target, "rb") as f:
+                self.assertEqual(plistlib.load(f), launchagent.plist(*args))
+            self.assertTrue(os.path.isdir(f"{tmp}/Logs/claude-agents"))
+
+    def test_cli_bad_args(self):
+        r = subprocess.run([sys.executable, SCRIPT, "write"], capture_output=True, text=True)
+        self.assertEqual(r.returncode, 2)
+
+
+if __name__ == "__main__":
+    unittest.main()