**Model**: Claude Opus 4.6
**Date**: 2026-03-12
-## Summary
+## Source Repository
-No canonical upstream repository with UFO or Glyphs sources was found for the Sail font family. The font was designed by Miguel Hernandez and published by LatinoType Limitada. Searches of GitHub and known organization accounts did not locate a public source repository.
+The `googlefontdirectory-hg` monorepo (the historical Google Font Directory Mercurial archive) contains files for this family.
+
+- **Repository**: `googlefontdirectory-hg`
+- **Commit**: `52f780bc9d197280a9f430574e179a5f233c56b6`
+- **Source path**: `sail/src/`
+
+## Source Files
+
+The `sail/src/` directory contains design sources in VFB (FontLab) and SFD (FontForge) formats, neither of which can be built with gftools-builder:
+
+- **VFB** (FontLab, proprietary format, not buildable with gftools): Sail-Regular-OTF.vfb
+- **SFD** (FontForge, not buildable with gftools-builder): Sail-Regular-TTF.sfd
+- **OTF** (compiled binaries, not design sources): Sail-Regular.otf
+
+## Buildability
+
+Not buildable with gftools-builder. The sources are in VFB (FontLab proprietary) and SFD (FontForge) formats. Neither format is supported by gftools-builder. Conversion to UFO or Glyphs format would be required.
## Designer
- **Designer**: Miguel Hernandez
- **Publisher**: LatinoType Limitada (luciano@latinotype.com)
-## Investigation
+## Investigation Details
The following searches and checks were performed:
- Checked `repos/Latinotype/Sail` — not found
- Checked `repos/googlefonts/SailFont` and `repos/googlefonts/Sail` — not found
- Checked LatinoType GitHub organization repos — no Sail repository found
-
-## Result
-
-No source block was added to METADATA.pb. The font appears to have been contributed to Google Fonts without a public source repository, or the sources may be hosted elsewhere (e.g., private repository or non-GitHub hosting).