Flue · 3× · last seen Aug 16, 2026
54
Momentum
Flue is an Open Source TypeScript framework by the Astro team (led by Fred K. Schott) for building autonomous, headless AI agents with built-in agent harness. Rather than a classical LLM SDK abstraction, Flue offers Sessions, Tools, Markdown Skills, sandbox environments, and durable execution. The software is open source under the Apache 2.0 license, runs model-agnostic, and can be deployed on Node.js, Cloudflare Workers, GitHub Actions, or GitLab CI/CD. Flue was publicly unveiled on May 1, 2026 as "The First Agent Harness Framework," with version 1.0 Beta available since June 16, 2026.
Momentum trend
18.05.16.08.
Features
| Autonomy Level | Fully headless and programmable, no TUI/GUI, autonomous goal pursuit across sessions |
| Channels | Slack, Discord, GitHub, Microsoft Teams, Linear, Telegram, WhatsApp, Twilio, Notion, Stripe, Shopify, Zendesk, Salesforce, and more |
| License | Apache License 2.0 (open source) |
| Modalities | Text; plus image inputs (agents can process images, not just text) |
| Platform | TypeScript framework, deployable to Node.js, Cloudflare Workers, GitHub Actions, GitLab CI/CD |
| Price | Free, open source (no license fees); sandbox providers like E2B/Daytona are separate paid services |
| Release Date | Public launch May 1, 2026, 1.0 Beta on June 16, 2026 |
| Tool/MCP Integrations | MCP server support for connecting authenticated tools/services; plus observability (OpenTelemetry, Braintrust, Sentry) and database adapters |