Plugins exposed via d-bus remote.

README-REMOTE-CONTROLLER.md

@@ -138,6 +138,24 @@ are categorized as **Commands**, **Runtime Getters**, and **Runtime Setters**:
 
 You can discover and execute these for each module.
 
+### Plugin Modules
+
+Plugins that expose D-Bus decorators are automatically registered as modules using the naming
+convention `Plugin_<ModuleName>` (e.g., `Plugin_GameMode`, `Plugin_WindowTitleReader`). Use
+`ListModules` to discover available plugin modules at runtime.
+
+### PluginSystemManager Module
+
+The `PluginSystemManager` module provides session-only plugin control:
+
+- `ListPlugins`
+- `ListActivePlugins`
+- `IsPluginActive` (parameterized)
+- `SetPluginActive` (parameterized)
+- `RescanPlugins`
+
+These calls do **not** persist changes to user preferences.
+
 ### Discovering Module Capabilities
 
 #### List Commands for a Module