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Fly.ioAnnouncement
Phoenix.new – The Remote AI Runtime for Phoenix
Summary
Phoenix.new is presented as a batteries-included, fully online coding agent designed for Elixir and Phoenix, after an initial weekend project grew into a system that generated Phoenix applications and drove an in-browser IDE. It runs in an ephemeral Fly Machine, giving the agent and user a shared root shell while isolating local machines; applications launch in the cloud with preview URLs, GitHub integration, and Fly.io infrastructure guardrails. A headless Chrome browser lets the agent inspect page content and JavaScript state, interact with front ends, and correlate changes with server-side logs while testing applications. The system already handles full-stack applications using WebSockets, Phoenix Presence, and real databases, can work with other installed languages and frameworks, and is being used to triage GitHub issues and produce pull requests asynchronously.
Context
The project began to make LLM agents work with Elixir as well as Python and JavaScript. It also targets the tedious work of getting agent-built applications online, which is described as potentially taking much longer than writing the code.
Approach / What changed
Phoenix.new combines a shared root shell in an isolated, ephemeral Fly Machine with cloud deployment, preview URLs, GitHub integration, and Fly.io infrastructure guardrails. Its agent can drive a headless Chrome browser, inspect page content and JavaScript state, read server logs, run tests, and interact with applications.
Takeaways
Each session provides the user and agent a shared root shell in an ephemeral Fly Machine, allowing package and operating-system changes without affecting the local machine.
The headless Chrome integration lets the agent test front-end changes against real page content and JavaScript state, rather than relying only on screenshots or compilation and linting.
Phoenix.new can build applications with WebSockets, Phoenix Presence, and real databases, and supports asynchronous work such as triaging GitHub issues and producing pull requests.
Source and freshness
- Source
- fly.io
- Published
- Added to Yomu
- Last updated
Summaries are generated from the original by a language model. Check the original before relying on it.
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