Agent-native TypeScript framework for MCP servers.

Build and run agents you can see, understand and trust.
Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScript - any model, any cloud.
Local first, desktop companion platform with animated pets, plugin SDK and coding-agent integrations.
Open-source, self-hosted Claude Code - a terminal AI assistant and the Python framework behind it. Tool-calling, sandboxed execution, multi-agent teams, skills, checkpoints, unlimited context - on Pydantic AI, any model.
Bug bounty agent framework for Claude Code, Codex, Gemini, Cursor, Windsurf, Copilot, and OpenClaw — 48 agents, 26 commands, 19 CLI tools, 2 MCP servers, autonomous hunt loops, exploit chain builder.
OpenJudge: A Unified Framework for Holistic Evaluation and Quality Rewards
Fluent argument validation for fluent software development.