June 23, 2026
The app that edits itself?!
Show HN: Y – A malleable coding-agent desktop app built with Electron
A self-changing coding app drops and the crowd is equal parts impressed, confused, and suspicious
TLDR: y is a new desktop coding app that can rewrite parts of its own interface while keeping the risky core locked down. Commenters were impressed by the sci-fi idea, but the biggest reaction was confusion over how it works and suspicion about why a supposedly local app still wants a login.
A new app called y just strutted onto Hacker News with a wild pitch: it’s a desktop tool for coding chats that can change its own interface while you use it. In plain English, you can ask the app to reshape how it looks and works, then keep the change if it behaves or toss it if it breaks. It runs on your own machine, leans on existing coding assistants like Claude Code and Codex, and promises that your files and prompts stay local. That sounds futuristic enough, but the real show was in the comments, where the crowd went from “this is cool” to “hold on, explain yourself” in record time.
The strongest vibe was fascinated curiosity. One commenter cheered, another compared it to Smalltalk, which is basically a giant compliment from programming history buffs. But the honeymoon lasted about five seconds before the questions rolled in. People wanted receipts: What exactly is “Modify”? Is this some kind of magical auto-generated screen builder? What can it actually do, and what is blocked for safety? Then came the sneaky sharp jab that gave the thread its drama: if this thing is local and uses the user’s own coding tools, “y” is there a login to the creator’s site at all? That one landed like a sitcom punchline and a privacy challenge at the same time.
So the mood? Intrigued, amused, and lightly side-eyeing. Everyone seems to agree the idea is bold. They just also want fewer mystery boxes and fewer login screens.
Key Points
- •y is a chat-first desktop coding-agent app that can modify its own user interface through a protected Modify surface.
- •The app separates a Protected Kernel from a Mutable Userland so UI changes can happen without giving modification control over the trusted core.
- •y runs coding agents locally through official CLIs, including Claude Code CLI and Codex CLI, using the user’s own local authentication.
- •The app supports isolated workspaces, parallel chats across different engines, diff-gated UI changes, and rollback to known-good snapshots.
- •The current release target is macOS Apple Silicon, builds are published on GitHub Releases, and the project is under active development under the MIT license.