FlyCrys — Development skill for Claude Code

FlyCrys

**Native Linux GUI for Claude Code agents.** One binary, starts in under a second, no Electron.

[](https://github.com/SergKam/FlyCrys/stargazers) [](LICENSE) [](https://github.com/SergKam/FlyCrys/releases/latest)


Why this exists

I've used Linux exclusively for 30 years. When Claude Code became my daily driver for writing software, the terminal worked but I kept hitting walls: can't preview images, can't see a file tree while the agent works, can't render markdown without switching to a browser, can't juggle multiple project streams without a mess of terminal tabs.

I didn't want Cursor or anything Electron-based. I wanted something native that feels like it belongs on a GTK desktop.

FlyCrys is not an IDE. It doesn't edit files. Agents do. You talk to agents, they write the code. FlyCrys gives you a workspace to manage that workflow: file tree on the left, viewer in the middle, agent chat on the right, terminal at the bottom. That's it.

What makes it different

• Only native Linux GUI for Claude Code — Opcode uses webview, Claude Desktop skips Linux entirely
• GTK4 native — follows system theme, integrates with GNOME, minimal resources
• Workspace-oriented — not just a chat wrapper; file tree, viewer, terminal, git panel, all wired together
• Agent profiles — preconfigured Security, Research, Default agents with custom system prompts and tool restrictions
• Zero cost — no subscription, no API proxy, uses your own Claude Code CLI
• Single binary — one cargo build, one .deb, done

Install

Debian / Ubuntu (recommended)

curl -fsSLo /tmp/flycrys.deb https://github.com/SergKam/FlyCrys/releases/latest/download/flycrys_amd64.deb
sudo apt ins