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About

Flue is an open agent framework for building durable AI agents with a programmable TypeScript harness. Created by the team behind Astro, it uses a React-like hooks API to compose agent behavior, persistent state, lifecycle events, models, tools, sandboxes, subagents, skills, and MCP servers in code. Agents are stateful and addressable over HTTP, keep context across conversations and events, and can change capabilities as work progresses. Flue records every session in a durable stream, so accepted work survives crashes, restarts, and deploys; interrupted sessions resume automatically and clients reconnect without starting over. Developers can run agents locally, in CI, from their own backend, or orchestrate them with systems such as Cloudflare Workflows and Inngest. Secure sandboxes let agents run commands, edit files, and do real work, while tools connect them to APIs and data. Flue is powered by Pi and supports different LLM providers, allowing teams to choose the models they want.

About

OpenHarness is an open-source TypeScript SDK for developers building custom AI-agent applications, including coding agents, CLI tools, and web-based assistants. It provides stateless agent execution, explicit conversation-state handling, streaming events, composable middleware for retries, persistence and context compaction, hierarchical subagents, and permission-controlled tools. Developers can connect model providers through the Vercel AI SDK, add external capabilities through Model Context Protocol (MCP), and use filesystem or shell tools through configurable providers. The SDK also offers React hooks and Vue composables for streaming agent output into application interfaces. OpenHarness is installed as an npm package and is intended to be embedded in projects running on Node.js or edge runtimes; it is a developer library rather than a hosted end-user agent service.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and AI engineering teams requiring a tool to build durable, stateful agents that can use tools, maintain context, and run across different models and deployment environments

Audience

Software developers and engineering teams building custom AI-agent applications, including coding agents, CLI tools, and web assistants.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Flue
Founded: 2026
United States
flueframework.com

Company Information

OpenHarness
open-harness.dev/

Alternatives

Alternatives

Deep Agents

Deep Agents

LangChain
Mastra

Mastra

Mastra AI
eve

eve

Vercel
StateFabric

StateFabric

J Gregory Technology Ltd.
eve

eve

Vercel

Categories

Agentic AI Supported

Categories

Integrations

Model Context Protocol (MCP) Supported
Amazon Web Services (AWS) Supported
Anthropic Not Supported
Apache Sentry Supported
Cloudflare Supported
Daytona Supported
E2B Supported
Google Chat Supported
Linear Supported
Microsoft Teams Supported
MySQL Supported
OpenAI Not Supported
OpenClaw Supported
OpenTelemetry Supported
Render Supported
Salesforce Supported
Shopify Supported
Telegram Supported
TypeScript Supported
Vercel Supported

Integrations

Model Context Protocol (MCP) Supported
Amazon Web Services (AWS) Not Supported
Anthropic Supported
Apache Sentry Not Supported
Cloudflare Not Supported
Daytona Not Supported
E2B Not Supported
Google Chat Not Supported
Linear Not Supported
Microsoft Teams Not Supported
MySQL Not Supported
OpenAI Supported
OpenClaw Not Supported
OpenTelemetry Not Supported
Render Not Supported
Salesforce Not Supported
Shopify Not Supported
Telegram Not Supported
TypeScript Not Supported
Vercel Not Supported
Claim Flue and update features and information
Claim Flue and update features and information
Claim OpenHarness and update features and information
Claim OpenHarness and update features and information