A web editor for category-theoretic string diagrams. Compose shapes, wire their points, and round-trip the whole diagram as JSON — the visible surface of the NeSyCat toolkit for neuro-symbolic research.
NeSyCat — Neuro-Symbolic Category — sits at the intersection of category theory, deep learning, and formal logic. Researchers already think in string diagrams. The editor just gives those diagrams a live canvas and a JSON spine so they can feed a codegen pipeline.
The tool is deliberately narrow: four shape primitives, one empty carrier, two edge modes, no chrome beyond Kinds and JSON. The canvas is the product.
Launches in-browser. Sign in to save your diagrams to your account.
// bibtex
@software{nesycat2026,
title = {NeSyCat Diagrams},
author = {NeSyCat contributors},
year = {2026},
url = {https://github.com/NeSyCat/Diagrams}
}