macOS arm64 · Windows x86_64 — freeA native code editor / IDE whose entire UI is pure Krypton. On macOS via Objective-K and Choc (no Obj-C / Swift source); on Windows via stdlib/gui.k over the Win32 IAT. A real native app on Mac, a real Win32 app on Windows — driven by Krypton functions. Pairs with the stem terminal.
File tree, tabs, live syntax highlighting and a Run button — the VS Code basics, with zero Objective-C source.
Colours keywords, strings and comments as you type, via an NSTextStorage delegate that is itself a Krypton function.
An NSTableView sidebar (Krypton data source) lists the folder; multi-file tabs (NSSegmentedControl) keep each document's text.
⌘O / ⌘S, and ⌘R compiles the open file with kcc and shows the output. New / Close tab, a full Edit menu.
A bottom pane runs shell commands and shows their output, next to the editor.
Window, text view, table data sources, menus and delegates are all driven by Krypton funcs — the same Choc layer stem is built on.
A single Mach-O, ad-hoc signed, no runtime dependency.
macOS on Apple Silicon (Tahoe).
brew install --cask t3m3d/krypton/brain
Pure Krypton on objk — no C, no Obj-C, no Swift. Or grab the DMG.