LangBot Plugin Infra
Plugin SDK, CLI, Plugin Runtime and Box sandbox runtime for LangBot.
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Overview
This repository is the shared infrastructure powering LangBot's plugin and
sandbox subsystems. It is published to PyPI as the single
langbot-plugin package and ships
three things:
- Plugin SDK & CLI (
lbp) — Python APIs, base classes and thelbpcommand for scaffolding, building, debugging and publishing plugins. - Plugin Runtime (
lbp rt) — the host process that discovers, installs and runs plugins, bridging them to LangBot over stdio or WebSocket. - Box Runtime (
lbp box) — the code-sandbox service backing LangBot's Box subsystem, executing untrusted code via Docker / nsjail / E2B backends.
LangBot depends on this package as the pinned langbot-plugin==<x.y.z> in its
pyproject.toml; the canonical version lives in this repo's pyproject.toml.
The Runtime component (
src/langbot_plugin/runtime/) is licensed separately under AGPL; everything else in this repository is Apache 2.0. Seesrc/langbot_plugin/runtime/README.md.
Install
pip install langbot-plugin
# or, recommended
uv tool install langbot-plugin
lbp --help
CLI at a glance
| Command | Purpose |
|---|---|
lbp init <name> |
Scaffold a new plugin project |
lbp comp <Type> |
Generate a component (Command / Tool / EventListener / KnowledgeEngine / Parser / Page) |
lbp run |
Run / remote-debug a plugin against a running LangBot |
lbp build |
Package the plugin into a distributable zip |
lbp publish |
Publish to the LangBot Plugin Market |
lbp login / lbp logout |
Authenticate with your LangBot account |
lbp rt |
Launch a standalone Plugin Runtime (control 5400, debug 5401) |
lbp box |
Launch a standalone Box sandbox runtime (default port 5410) |
lbp ver |
Print the CLI / package version |
Component types
Plugins extend LangBot through six component types, scaffolded with
lbp comp <Type>:
- Command — user-triggered actions (e.g.
!weather tokyo) - Tool — LLM-callable functions for AI agents
- EventListener — handlers for message-pipeline events
- KnowledgeEngine — custom knowledge-base retrieval for RAG
- Parser — custom message / content parsing
- Page — custom web page embedded in the LangBot admin panel
Documentation
- Plugin development tutorial — https://docs.langbot.app/zh/plugin/dev/tutor
- Debugging the Runtime / CLI / SDK — https://docs.langbot.app/zh/develop/plugin-runtime
- Dev environment setup — https://docs.langbot.app/zh/develop/dev-config
License
Apache 2.0, except the Plugin Runtime (src/langbot_plugin/runtime/) which is
AGPL. See LICENSE and the
Runtime README.
1 maintainer
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