# Sigmar One — Upstream Source Investigation

**Designer**: Vernon Adams
**Model**: Claude Opus 4.6
**Date**: 2026-03-12

## Summary

The canonical upstream repository for Sigmar One was found at `googlefonts/sigmarone` on GitHub. The repository contained Glyphs source files and was maintained under the googlefonts organization. The font was originally designed by Vernon Adams and the repository received subsequent updates from contributors.

## Repository

- **URL**: https://github.com/googlefonts/sigmarone
- **Commit**: `1fb4311d78953da0f943e0e4b806acdd076af81b`
- **Commit date**: 2023-02-24
- **Default branch**: main

## Sources Found

The `sources/` directory contained:
- `Sigmar.glyphs`

## Confidence

High. The repository was hosted under the googlefonts organization and contained Glyphs source files for the font. The most recent commit included a significant update (PR #31) from 2023.