SakanaAI/AI-Scientist-v2: Workshop-Level Automated Scientific Discovery via Agentic Tree Search — 2,683 Stars

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Sakana AI's second-generation AI Scientist uses agentic tree search to automate the full scientific discovery loop — hypothesis generation, experiment design, code execution, analysis, and paper writing — at workshop publication quality. This is the next evolution beyond the original AI Scientist (which was the first AI-generated paper accepted at ICLR). The v2 architecture moves from linear pipelines to tree-based exploration, allowing the agent to backtrack and explore alternative hypotheses.