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Stately Agent

XState library where agent logic is a state machine, so a model can only pick events the machine allows.

Harness by Stately

IndexedMIT★ 484
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Install

From the package registry. Read the repository before you give any tool access to your data.

npm install @statelyai/agent

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About

Stately Agent models an LLM agent as an XState state machine: the machine defines which actions are allowed, and the model proposes an event that the machine accepts or rejects. The application chooses the model, runs the requests and stores the state, and the machine can be tested without an API key. The package is in alpha, and optional executors exist for the Vercel AI SDK, the OpenAI SDK and TanStack AI.

Use cases: agent-orchestration

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Fact sheet

Languages
TypeScriptREADME
Packages
@statelyai/agent (npm)README
Multi-agent
YesREADME
Orchestration
graphREADME
Model providers
openaiREADME
Maturity
ExperimentalREADME

Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

Alternatives

Frameworks for the same language with a similar way of orchestrating agents.

Signals

Stars
484
Forks
26
Open issues
6
Last commit
Oct 24, 2026 (7 days ago)
Last release
Sep 28, 2024 (2 years ago)

From GitHub (fetched Oct 24, 2026).

Details

Packages
npm @statelyai/agent
License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Stately Agent. Agent Mart. https://agentmart.dev/harnesses/stately-agent (last updated 2026-10-24)