spectral-m2

A new face for the M2 prompt. It’s still the good old REPL underneath, just with a TUI that doesn’t feel like 1995.

cargo install spectral-m2 --locked
sp2

What’s nicer

Highlighting as you type, and Enter on an unfinished expression just continues it on the next line.
Rendered output: TeX becomes actual maths in the terminal (stacked fractions, ℚ if you like), long outputs fold, and help pages show up inline with clickable links.
Side views of your session: just the code, just the values, printed output, or the syntax tree of what you typed.
History with prefix search: type ide, press Up, get only things starting with ide. Shared live between open shells.
Sessions: your code is saved on exit and /resume brings it back (by re-running it). /save and /load work with any .m2 file.
Colour schemes: catppuccin, tokyo night, gruvbox, everforest, rosé pine, kanagawa… light and dark.

Your init.m2 and installed packages load as usual.

Type / on an empty line and everything is listed. The ones you’ll use most:


`Alt`+`C` / `V` / `P` / `T`	View code / values / printed output / syntax tree
`Shift`+`Enter`	New line
`Alt`+`R`	Restart M2
`Ctrl`+`O`	Settings (theme lives here)
`Alt`+`K`	Rebind keys
`Ctrl`+`C`	Quit

M2 on your PATH
A terminal with true colour. Kitty, WezTerm, Ghostty, foot and the like are perfect.
A Nerd Font for the icons, or SPECTRAL_M2_BASIC_GLYPHS=1

You can’t interrupt a running computation yet (a cell gives up after 5 minutes), and it’s one evaluation at a time.