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+# Debugging Plugin Runtime, CLI, SDK
+
+::: info
+Please read the [Plugin Tutorial](/en/plugin/plugin-intro) first to understand the plugin system.
+
+- Plugin Runtime, CLI, SDK are open sourced at: https://github.com/langbot-app/langbot-plugin-sdk
+:::
+
+Clone the plugin runtime source code:
+
+```bash
+git clone https://github.com/langbot-app/langbot-plugin-sdk
+```
+
+Enter the plugin runtime directory and install dependencies:
+
+```bash
+cd langbot-plugin-sdk
+uv sync --dev
+```
+
+At this point, uv will automatically create a virtual environment (.venv) for you. If your editor asks whether to use this virtual environment, please select `Yes`.
+
+Or you can manually activate this virtual environment:
+
+```bash
+source .venv/bin/activate
+```
+
+## Start Plugin Runtime
+
+```bash
+lbp rt
+```
+
+Please ensure that the `lbp` command is the `lbp` executable in the virtual environment of this directory, or start it via `python -m langbot_plugin.cli.__init__ rt`.
+
+Plugin Runtime accepts the following parameters:
+
+- `--debug-only`: Do not start plugins in the `data/plugins` directory, only allow loading plugins through debug connections.
+- `--ws-debug-port`: Debug port to listen on, default is `5401`.
+- `--ws-control-port`: Control port to listen on (for LangBot main program connection), default is `5400`.
+- `-s`: Use `stdio` to accept control connections. **Use only in production environment**.
+
+### Make LangBot Connect to This Runtime
+
+Configure `plugin.runtime_ws_url` to `ws://localhost:5400/control/ws` in LangBot's `data/config.yaml`.
+
+```yaml
+plugin:
+  runtime_ws_url: ws://localhost:5400/control/ws
+```
+
+And add the startup parameter `--standalone-runtime` when starting the LangBot main program (e.g., `uv run main.py --standalone-runtime`).  
+Restart LangBot, and it will connect to this runtime using WebSocket.
+
+## langbot-plugin-sdk Architecture
+
+This codebase contains the following:
+
+- `langbot_plugin.api`: Plugin-related entities and API definitions.
+- `langbot_plugin.assets`: Plugin templates.
+- `langbot_plugin.cli`: Plugin development CLI tools.
+- `langbot_plugin.entities`: Plugin system-related entities not defined in API.
+- `langbot_plugin.runtime`: Plugin runtime and underlying communication (stdio and websocket) implementation.
+
+## `lbp` CLI Tool
+
+The CLI tool provides Runtime startup, plugin initialization, plugin component management, Marketplace interaction, and other functions.
+
+For detailed program entry points, please see [`langbot_plugin.cli.__init__`](https://github.com/langbot-app/langbot-plugin-sdk/blob/main/src/langbot_plugin/cli/__init__.py).
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