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Retriever
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RRetriever logo

Retriever

retriever.systems·Infrastructure

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.

Open Source
WebSelf-hosted
R
Retriever preview
Visit retriever.systems↗

Overview

5 features

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.

  • ✓Closed-loop control
  • ✓Multi-rate execution
  • ✓Explicit timing
  • ✓Data handoff
  • ✓VLM integration

Tags

robot-frameworkclosed-loop-agentsmulti-rate-controlvla-integrationmanipulation-agents

AI capabilities

Multimodal

Built with & integrations

Framework
astro
Hosting
cloudflare
Runs on
BrowserSelf-hosted

Trust & compliance

LicenseOpen Source
Verified signals
✓ HTTPS✓ Open Source

Recent events

Latest indexed changes and source events

  1. IndexedJul 21, 5:29 AM

    Retriever: A Programming Framework for Closed-Loop Robot Agents verified by the PulseGate indexer

    Source: PulseGate indexerOpen ↗

Frequently asked questions about Retriever

What does Retriever do?
Retriever focuses on building robot agents that coordinate perception, reasoning, and control at mismatched rates in a single program. It is catalogued under Frameworks & SDKs on PulseGate.
Who is Retriever for?
Retriever is an open-source project built for robotics developers.
Is Retriever free?
Yes — Retriever is open source under the Open Source license and free to use.
What platforms does Retriever run on?
Retriever runs on the web. It can also be self-hosted.
Is Retriever still maintained?
PulseGate's liveness checks currently classify Retriever as active.
What are alternatives to Retriever?
Similar tools tracked by PulseGate include AgentRecall, Retriever Score, and Recall™.AgentRecallRetriever ScoreRecall™
Is Retriever open source?
Yes — Retriever is open source under the Open Source license.

At a glance

Pricing
Open Source
Platforms
Web
Languages
English
License
Open Source
First seen
Jul 21, 2026
Activity
🟢 Active
Status
🟢 Active
Built for
robotics developers
Model
Open source
Solves
Building robot agents that coordinate perception, reasoning, and control at mismatched rates in a single program.

Developer

Retrieversystems

Live coverage

Confidence
Medium · 68
Indexed
Jul 21, 2026
Lifecycle
Alive
Activity
Active
First seen
Jul 2026
Last seen
today
Identity audit (9)
Entity ID
cmru7s72e03s0f8a66pbtjrxd
Slug
retriever-a-programming-framework-for-closed-loop-ro-retriever-systems
Verification state
Indexed for public listing
Claim / listing state
Unclaimed · listed: yes
Index status
Included in index
Latest evidence snapshot
Jul 21, 2026
Timeline basis
Indexed-at chronology (no inferred launch/funding milestones).
Last updated
Jul 21, 2026
Canonical URL
https://retriever.systems/blog

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