pathogen-lang · v0.7.0 Blog Docs Explore Featured

From a one-liner to a thousand-line composition.

Pathogen Studio is a typed, expression-first language for SVG paths. Compile from the CLI, the playground, or your editor — get the same path output every time.

let colors = Color.palette(oklch(0.6695 0.2483 330.1),                           oklch(0.8142 0.1571 72.9),                           29);let center = Point(200, 200);for ([color, index] in colors) {  let petalLayer = PathLayer(`layer-${index}`) ${    fill: color.lighten(20%);    stroke: color;    stroke-width: 4;  };  petalLayer.apply {    let petalCenter = center.polarTranslate(calc(2pi * (index / colors.length)), 120);    circle(petalCenter.x, petalCenter.y, 50);  }}
→ 29 paths · 0.04s

Source · MIT

GitHub.

Read the source, file an issue, send a pull request. Compiler, evaluator, stdlib, CLI — all in one repository.

$ git clone ryankuykendall/pathogen-lang

CLI · Node

Compile anywhere.

Pipe stdin, eval inline, or compile a file. Output as a path string, a full SVG, or an annotated debug view.

$ npm install -g pathogen-lang

VS Code · Coming soon

In the editor.

LSP-powered completions, hover docs, diagnostics, and a live preview pane — install the extension when it lands and write Pathogen anywhere you write code.

$ code --install-extension pedestal-design.pathogen-lang

From the blog · Latest

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Five more custom filters that close the gaps native CSS leaves open: outer/inner glow, embossed surfaces, Material-style elevation shadows, inset shadows, and pixelation — all configured by named parameters, all composable via GroupLayer.

May 12, 2026