haystack
Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generatio. haystack is open source, written primarily in Python, released under Apache License 2.0. Its repository has 26.1K GitHub stars and 3K forks, and was last committed to within the last two weeks. Niched places it in AI agents & autonomous workflows.
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