SWE-smith

langgraph-bigtool stores tool names, descriptions, namespaces, and other metadata in a LangGraph Store so an agent can search for relevant tools before calling them. It is designed for registries containing hundreds or thousands of tools, supports in-memory and PostgreSQL backends, and lets developers replace the default retrieval logic with a custom function.

MCP-Zero is the open-source code accompanying a paper on active tool discovery and retrieval for autonomous LLM agents. It includes instructions for an MCP-tools dataset covering 308 servers and 2,797 tools, plus code under MCP-tools/build_data for constructing a custom server dataset. The data file must be obtained separately and placed at the path expected by the evaluation code.

MagicSkills keeps reusable `SKILL.md` directories in one local pool and lets users compose named subsets for different agents or workflows. Runtimes that read `AGENTS.md` can receive a synchronized skill section, while agent frameworks can use the same collection through a command-line or Python tool interface. It is aimed at multi-agent projects that want to avoid copying and drifting skill folders, and requires Python 3.10–3.13 plus Git.

ToolRAG registers tools from MCP servers, embeds their descriptions, and uses semantic retrieval to select the functions relevant to a user query. The selected definitions can be passed in an OpenAI-compatible format and executed against the corresponding servers, while LibSQL stores the tool index and embeddings. It is aimed at assistants that need access to many APIs without sending every tool definition on every request.