Retriever is a programming framework designed for general-purpose robot agents. It enables the creation of closed-loop systems combining slow VLM reasoning, medium-rate skill execution, and high-rate control, with each component running on independent clocks. The framework makes timing and data handoff explicit. It includes Retriever-0, a bimanual manipulation agent evaluated on long-horizon tasks involving partial observability, conditional replanning, and dexterous manipulation such as retrieval from deformable bags.
In the Frameworks & SDKs space, Retriever takes a focused approach. It focuses on building robot agents that coordinate perception, reasoning, and control at mismatched rates in a single program. It is built as an open-source project for robotics developers. Retriever is open source under the Open Source license. Retriever is available on the web, and it can be self-hosted.
Key capabilities include closed-loop control, multi-rate execution, and explicit timing.
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Retriever: A Programming Framework for Closed-Loop Robot Agents verified by the PulseGate indexer
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