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

Install

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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 (4 days ago)
Last release: Sep 28, 2024 (2 years ago)

From GitHub (fetched Oct 24, 2026).

Details

Packages: npm @statelyai/agent
License: MIT
Repository: github.com/statelyai/agent
Website: stately.ai/docs/agents
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: README github-graphql

Cite this page

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