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langchain-ai/langchain
The agent engineering platform.
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Repository signals
Mapped use cases
Local LLM Tools
Local LLM ToolsLocal model runners, inference servers, gateways, and self-hosted chat or agent tools.
Use caseNeeds verification
Open-Source AI Agents
Open Source AI AgentsAgent frameworks and projects for building autonomous or semi-autonomous software workflows.
Use caseNeeds verification
RAG Frameworks
RAG FrameworksRetrieval-augmented generation frameworks, vector databases, and data tooling for knowledge-connected LLM apps.
Use caseNeeds verification