1.0 Beta — Read the announcement

The Open Agent Framework

Build durable AI agents and workflows with Flue's programmable TypeScript harness. Write once, deploy anywhere, use any LLM.

agents/triage.ts
import { createAgent } from '@flue/runtime';
import { local } from '@flue/runtime/node';
import triage from '../skills/triage/SKILL.md' with { type: 'skill' };
import verify from '../skills/verify/SKILL.md' with { type: 'skill' };
import { replyToIssue } from '../tools/github.ts';

// Expose (and protect) your agents to the world:
export const route = (c, next) => next();

// Give agents the autonomy to solve complex tasks:
const instructions = `
Triage a bug report end-to-end: reproduce the bug,
diagnose the root cause, verify whether the behavior is
intentional, and attempt a fix.`;

// Compose the context your agent needs to do real work,
// complete with virtual, local, or remote container sandbox.
export default createAgent(() => ({
  model:   'anthropic/claude-sonnet-4-6',
  tools:   [replyToIssue],
  skills:  [triage, verify],
  sandbox: local(),
  instructions,
}));

Powered by Pi, the open agent harness.

Flue is powered by Pi, the trusted agent harness used by OpenClaw and millions worldwide. Pi gives you the tools you need to unlock real agent autonomy, moving beyond simple chatbots.

Pi is the core of our open tech stack including Durable Streams, Vite, and a flexible Sandbox API. Deploy Flue anywhere with confidence.

Flue agent architecture An isometric agent harness powered by Pi, stacked above the Flue runtime. RUNTIME SANDBOX · DATABASE · DEPLOYMENT HARNESS SESSIONS · TOOLS · SKILLS

Durability. Recovery. It's all handled for you.

Agents can’t die when the server goes down. Flue records every session in a durable stream, then safely resumes interrupted work when the runtime comes back online. Run one agent or a multi-agent swarm on the same durable foundation.

  • Accepted work is never lost
  • Interrupted sessions resume automatically
  • Clients reconnect without starting over
0 agents online