Phi — Pi AI Agent for VS Code

Project intro

Phi (φ) is an AI agent extension for VS Code, and the author's own description leaves no ambiguity about how it was built: "Phi is a vibe-coded project - built with AI agents (using Pi), iteratively refined, and open to everyone." That statement appears verbatim both in the README and on its Open VSX extension page. The extension is real and installable: Phi is listed on Open VSX as gnassro/phi-agent at version 0.9.1, powered by the Pi coding agent SDK (@earendil-works/pi-coding-agent@1.0.4). Per the README, it is "built with TypeScript + vanilla JS", and the repository (gnassro/phi) was last pushed on 2026-10-11 - days before this writing - so the project is being actively iterated, matching the author's "iteratively refined" claim. A nice meta touch: a coding-agent extension that was itself built by coding agents. If you work in VS Code and want an Open VSX-native AI assistant, Phi is worth a look.