Reflex is a coding agent and personal assistant built on the Pi coding agent. A large model plans and writes code through OpenRouter or a direct provider, and a quick Jev layer answers narrow typed questions about each step in a few hundred milliseconds.
That reflex layer checks every tool call before it runs, routes each request to a model, picks skills and connectors, and checks a finishing claim against what was actually asked. The thresholds live in plain code you can read, and every decision is logged.
Around it are voice input, macOS computer use, a browser agent, MCP connectors, scheduled agents and deploys, with eval and test suites. You build it yourself and add a TypeSafe key for the Jev layer.
What you get
- Full TypeScript source code under the MIT license
- The agent, its Jev reflex layer, a web interface and the eval and test suites
Jev
TypeScript
Bun
Node.js
Claude Code
Codex
Rust
Herdr