+# Stint Ultra Expanded -- Upstream Source Investigation
+
**Model**: Claude Opus 4.6
-# Stint Ultra Expanded — 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**: `stintultraexpanded/src/`
+
+## Source Files
-## Summary
+The source directory contains: 3 VFB files (FontLab, proprietary format); 1 compiled binary (OTF/TTF, not design sources).
-No canonical upstream repository with UFO or Glyphs sources was found for Stint Ultra Expanded. The only GitHub repository found was a librefonts mirror (`librefonts/stintultraexpanded`) containing only VFB (FontLab) sources.
+The VFB format is proprietary (FontLab) and cannot be built with gftools-builder. These sources are **not directly buildable** with the current open-source pipeline.
+
+### Key source files
+
+- `StintUltraExpanded-Regular-OTF.vfb` (VFB, proprietary)
+- `StintUltraExpanded-Regular-TTF.vfb` (VFB, proprietary)
+- `StintUltraExpanded-Regular.vfb` (VFB, proprietary)
+- `StintUltraExpanded-Regular.otf` (compiled binary)
## Designer
- **librefonts/stintultraexpanded**: Mirror repository only. The `src/` directory contained `StintUltraExpanded-Regular-OTF.vfb`, `StintUltraExpanded-Regular-TTF.vfb`, and `StintUltraExpanded-Regular.vfb` — VFB only, no UFO or Glyphs sources.
- **astigmatic GitHub**: The `astigmatic` GitHub user had only two private/placeholder repos (`pro`, `project1`), no font repositories.
- No other repositories for this font were found on GitHub.
-
-## Conclusion
-
-No source block was added. The font sources only exist as VFB in a librefonts mirror, which is excluded per the investigation policy.