Marvin (PrefectHQ)

AI functions and agentic workflow library by PrefectHQ. Provides decorator-based AI functions (marvin.fn, marvin.classify, marvin.extract, marvin.cast) and agent/task orchestration. v3.0 released 2024 — merged with ControlFlow, switched LLM backend from OpenAI-only to Pydantic AI (multi-provider). Current version: 3.2.7 (Mar 2026). WARNING: 'marvin' on PyPI is PrefectHQ's AI library — not the SDSS astronomy Marvin library (sdss-marvin on PyPI).