Draw line numbers and the current line's band in a gutter, with fold
chevrons that fade in while the pointer is over it, and a guide down
each open scope. Collapse a folded range behind a placeholder, and put
a swatch before each colour the server reports.
Drop the Monaco webview. Edit in a GtkSourceView on GTK and in a
native text view on Apple, both speaking to Frida.Compiler's
in-process language server for completions, signature help,
hovers and diagnostics.
Color, complete and indent code natively, matching the GitHub
theme in light and dark.