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Kern

Get to the Kern of things. — a calm, complete desktop code editor in the spirit of Zed, but quieter. Warm-graphite (or light) canvas, all-monospace chrome, and a single accent used sparingly.

Built with Tauri 2 (Rust) + React 19 / TypeScript / Vite + Monaco.

Kern editor

First launch greets you with a short tour of the key shortcuts — reopen it anytime from the palette → Help: Tour.

Features

Zed-style chrome — integrated title bar with custom window controls, nav arrows, a file-path breadcrumb, a minimap, and the file tree docked right.
9 themes incl. 2 light (Paper, Frost) — applied to both the CSS chrome and Monaco, switchable instantly. Custom font, size, line-height, tab size.
Projects + Welcome — save a folder as a named project, reopen instantly from ⌘⇧P. Tabs + session persist across restarts.
LSP — completion, diagnostics, hover, go-to-definition, find references, rename, format, go-to-symbol (Pyright, tsserver, rust-analyzer, gopls, clangd when on PATH).
Git (⌘⇧G) — stage/commit/push/pull/fetch, branch switch/create/merge, stash, conflict resolution, side-by-side diff, blame, history, gutter markers.
Code Runner — configurable per-language run commands + streamed output.
Integrated terminal (real PTY), split editor panes, global search & replace, snippets, markdown preview, vim mode.
Settings + Keybindings editor (⌘,) — fully rebindable, persisted; export/import config. Auto-save, format-on-save, problems panel.
Extensions page (⌘⇧X), multi-window (⌘⇧N), Zen mode, reduced-motion aware.

Install

Grab a package from the latest release:

sudo dpkg -i Kern_*_amd64.deb      # Debian/Ubuntu
sudo rpm  -i Kern-*.x86_64.rpm     # Fedora/RHEL
# or: chmod +x kern-linux-x86_64 && ./kern-linux-x86_64

Develop

pnpm install
pnpm tauri dev      # launches the desktop app with HMR

Build

pnpm tauri build              # produces a native bundle
pnpm tauri build --debug --no-bundle   # fast standalone debug binary

Note (Linux/WebKitGTK): pnpm tauri dev can occasionally render a blank window on first load — a WebKitGTK bug under Vite's native-ESM dev server (internallyFailedLoadTimerFired). Just reload/relaunch, or run a built binary (pnpm tauri build --debug --no-bundle → src-tauri/target/debug/kern), which serves a single bundle and is unaffected.

Keyboard shortcuts

Action	Shortcut
Save	⌘/Ctrl S
Command palette	⌘/Ctrl ⇧ P
Go to file	⌘/Ctrl P
Toggle sidebar	⌘/Ctrl B
Close tab	⌘/Ctrl W
Next / prev tab	⌘/Ctrl ⌥ → / ←
Source control	⌘/Ctrl ⇧ G
Addons	⌘/Ctrl ⇧ X
About & settings	⌘/Ctrl ,
Increase / decrease font	⌘/Ctrl + / −
Cycle theme	⌘/Ctrl K, then T

Language servers (optional)

LSP features light up automatically when the relevant server is installed and on PATH:

Language	Server
Python	`pyright-langserver` (or `basedpyright-langserver`)
TypeScript	`typescript-language-server`
Rust	`rust-analyzer`
Go	`gopls`
C / C++	`clangd`

Architecture

React UI — layout, theming, command palette, Monaco, the LSP bridge.
Rust backend — filesystem (read/write/watch), directory walking, git status via git2, and spawning language servers (bridged stdio ↔ WebSocket).
Frontend ↔ Rust over Tauri IPC (invoke commands + emit events).

See CODE_EDITOR_SPEC.md for the full design system and build spec.

Notes

Settings persist on disk via tauri-plugin-store (not localStorage).
Fonts: JetBrains Mono (SIL OFL), bundled under public/fonts.

kern-code 0.1.1