+# Supermercado One -- Upstream Source Investigation
+
**Model**: Claude Opus 4.6
-# Supermercado One — Upstream Source Investigation
+## Source Repository
+
+Design sources were found in the **googlefontdirectory-hg** archive (Google Font Directory, Mercurial-era).
+
+- **Repository**: googlefontdirectory-hg
+- **Commit**: `52f780bc9d197280a9f430574e179a5f233c56b6`
+- **Source path**: `supermercadoone/src/`
+
+## Source Files
-## Summary
+The source directory contains: 1 VFB file (FontLab, proprietary format); 2 SFD files (FontForge format); 1 compiled binary (OTF/TTF, not design sources).
-No canonical upstream repository with UFO or Glyphs sources was found for Supermercado One. The only GitHub repository found was a librefonts mirror (`librefonts/supermercadoone`) containing only VFB (FontLab) and SFD (FontForge) sources.
+Neither VFB (FontLab, proprietary) nor SFD (FontForge) formats are supported by gftools-builder. These sources are **not directly buildable** with the current open-source pipeline.
+
+### Key source files
+
+- `SupermercadoOne-Regular.vfb` (VFB, proprietary)
+- `SupermercadoOne-Regular-OTF.sfd` (SFD, FontForge)
+- `SupermercadoOne-Regular-TTF.sfd` (SFD, FontForge)
+- `SupermercadoOne-Regular.otf` (compiled binary)
## Designer
- No other repositories for Supermercado One were found.
- James Grieshaber had no identifiable GitHub presence with font source repositories.
- The font was created in 2011 under Sorkin Type Co., predating common use of UFO/Glyphs workflows.
-
-## Conclusion
-
-No source block was added. The font sources only exist as VFB/SFD in a librefonts mirror, which is excluded per the investigation policy.