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Introducing Seahaven: Synthetic Worlds for Agent Evals and RL

Seahaven is an open source Python framework for building synthetic worlds for AI agents: stateful, resettable, parallel environments for evals and RL.

By Steve CosmanKiln Blog
Introducing Seahaven: Synthetic Worlds for Agent Evals and RL

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Originally published by Kiln Blog on Oct 8, 2026.

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