Run git pull on all projects from a given base directory.

ISO 9660 CD/DVD filesystem reader and writer in pure JavaScript. Supports Joliet extensions.

Signals + templates + DOM binding. Standalone reactive UI library — zero dependencies. `@gcu/sideact/signals` gives you signal/computed/effect/batch without any DOM code.

Greedy voxel meshing for block models and volumetric data. Binning, bucket aggregation, chunked meshing, convenience helpers. Produces triangle meshes for rendering.

Unit conversion for length, mass, area, volume, angle, grade, density, and magnetic quantities. Sieve mesh conversions, drill core utilities, formatting helpers.

Soft — an English-keyword programming language with a tree-walking evaluator. Pure JS interpreter, locale-aware keywords (en, pt-BR bundled). Semantics map closer to JS than Python.

DataFrame-style structured data manipulation: series, tables, group-by, joins, CSV/JSON IO. Inspired by pandas, scaled down for a notebook runtime.

Python-in-JavaScript. AST parser + tree-walking evaluator in pure JS, no Wasm. Standalone library — Python values are JS values (no FFI boundary). Used by Auditable as a cell type.

Auditable Intermediate Representation — SSA IR compiler for JS, TypeScript, Python (adder), and Soft dialects. Type propagation, constant folding, runtime-helper specialization, and V8-hinted JS emission.

Three.js-based 3D scene for geoscientific visualization: block models, sections, drillholes, surfaces, polylines, clip planes, raycasting. Expects THREE on globalThis or passed via opts.

Regular block-model grid utilities: geometry (index/flat conversion, centroids, rotation), selections (masks, boolean ops), compacting, operations (map, reduce, histogram, grade-tonnage), spatial queries (slices, shells, regridding).

Shadertoy-compatible WebGL 2 shader helper. Tagged-template `glsl` + `shader(canvas, code)` for live hot-compile fragment shaders with Shadertoy-style uniforms.

Matplotlib-style plotting for the browser: subplots, plot, scatter, imshow, hist, bar. Canvas-based, zero runtime dependencies.

ndarray operations backed by atra-compiled Wasm kernels. NumPy-compatible element-wise ops, reductions, broadcasting, strided views. Designed to pair with @gcu/adder (Python) for numpy-style code; standalone JS API also available.

Roulette GCU Backend

A thin DOM shim over @gcu/adder — `<script type="adder">` for plain HTML pages. Python-flavored scripting with no build step, no WASM, and instant cold start.

Git Change User - change git user elegantly

Virtual filesystem abstraction over multiple backends: in-memory, File System Access API, OPFS, IndexedDB, HTML-comment embedded, fetch, REST, and overlays. Glob matching, event emitter, permissions.

Structural geology stereonet library — projections, statistics, contouring, fabric analysis

Typesetting engine — Knuth-Plass line breaking, hyphenation, page layout, canvas rendering. Turn markdown-ish source into typeset pages.