Open sourceTypeScript · ≈8.6k stars · Apache-2.0
Flue
A programmable TypeScript agent harness framework from the Astro team.
Flue is a TypeScript framework for building autonomous agents in the style of Claude Code and Codex rather than scripted LLM calls. Its built-in harness gives any model sessions, tools, skills (SKILL.md files), instructions, filesystem access and a sandbox — virtual, local or remote container — composed with hooks such as useModel, useSandbox, useSkill and useTool. Agents can run locally via CLI or be deployed. The repository lives under the withastro GitHub organization.
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Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Maintained by · 1
- AstroOrganisation
Built on · 2
- Claude CodeProject
- CodexProject
Similar entries · 1
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Sources
Verified Oct 29, 2026