feat(agent-runner): add plugin runner host integration

src/langbot/templates/config.yaml

@@ -122,6 +122,19 @@ plugin:
     binary_storage:
         # Max bytes for a single plugin binary storage value
         max_value_bytes: 10485760
+agent_runner:
+    # Host-level admin permissions for trusted control plugins. These plugins
+    # can use existing plugin action handlers to inspect or manage AgentRunner
+    # infrastructure across runner/plugin boundaries. Keep empty unless you
+    # fully trust the plugin identity.
+    #
+    # Example:
+    # admin_plugins:
+    #   - identity: langbot/agent-runner-control
+    #     permissions:
+    #       - agent_run:admin
+    #       - runtime:admin
+    admin_plugins: []
 monitoring:
     auto_cleanup:
         # Enable automatic cleanup of expired monitoring records