nyxpi

Mathematica energy in the terminal — a polished, no-bloat math CLI. Structured after the pi harness; not connected to any LLM. Pure local math.

npm install -g nyxpi

$ nyxpi "1/3 + 1/3"          2/3
$ nyxpi "simplify(sqrt(8))"  2*sqrt(2)
$ nyxpi "diff(x^2, x)"       2*x
$ nyxpi "solve(x^2 - 4, x)"  [-2, 2]
$ nyxpi "plot(sin(x), x, -2*pi, 2*pi)"    ← a real Braille chart, axes and all
$ nyxpi "1/0"                ⚠ domain: Division by zero.
                               hint: The divisor evaluates to 0; division by zero is undefined.

Run nyxpi with no arguments for the interactive REPL (:keys shows the keyboard shortcuts — the full readline set plus maths accelerators). Pipe in expressions one per line, or use --json for NDJSON output that composes with jq. --paper turns on a gridded graph-paper skin at interactive terminals. nyxpi mandelbrot is there when curiosity strikes.

The rule everything here obeys: never a silently-wrong answer. NyxPi computes exactly (1/3 + 1/3 is 2/3, not 0.6666…), labels the approximate (≈), or refuses with an error that teaches. What it can't do yet, it says so plainly — exact-first symbolic algebra (simplify · expand · factor · solve · diff) is in; integrals and limits say "not yet" instead of guessing.

Early release (0.x): the surface will grow, the honesty contract won't move.

MIT © Aleks — structured after pi by Mario Zechner, in the same open spirit.