y is a desktop coding‑agent app that lets the interface rewrite itself while you work. The main surface is a chat window, but a protected “Modify” rail can change the app’s UI on the fly. Users issue a diff‑gated request, review the generated changes, and either keep or roll back the UI update in real time, without restarting the program.

y does not ship a new AI model; it runs local CLIs for Claude Code and OpenAI Codex, preserving the developer’s own authentication. Isolated workspaces let multiple chats run in parallel without sharing the same checkout, and the terminal, file tree, and diff views stay visible while an agent works. The protected Kernel guards authentication, analytics and privileged APIs.

The app ships under an MIT license, with the current macOS Apple Silicon build available on GitHub releases. Privacy‑first design keeps project files, prompts and terminal commands local; analytics capture only usage health signals. y’s self‑modifying workflow, rollback snapshots and diff‑gated UI changes aim to make coding agents feel like truly malleable tools rather than static products for daily development cycles.