Flue — The Open Agent Framework

1.0 Beta — Read the announcement →

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

import { defineAgent } 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 defineAgent(() => ({
  model:   'anthropic/claude-sonnet-4-6',
  tools:   [replyToIssue],
  skills:  [triage, verify],
  sandbox: local(),
  instructions,
}));