-**Model**: Claude Opus 4.6
+# Underdog — Upstream Source Investigation
-## Underdog
+**Model**: Claude Opus 4.6
+**Date**: 2026-03-25
+**Investigator**: AI agent (Claude) under guidance of @felipesanches
**Designer**: Sergey Steblina, Jovanny Lemonad
-### Upstream Repository Search
+## Source Repository
+
+Source files were found in the **googlefontdirectory-hg** monorepo at commit `52f780bc9d197280a9f430574e179a5f233c56b6`, under the path `underdog/src/`.
+
+### Source Files
+
+- **VFB (FontLab)**: Underdog-Regular-OTF.vfb, Underdog-Regular-TTF.vfb
+- **OTF (compiled)**: Underdog-Regular.otf
+- **Adobe Illustrator**: ai_files/underdog_f.ai, ai_files/underdog_f2_extra.ai, ai_files/underdog_letters_correction.ai
+- **Other**: test_files/cyr.jpg, test_files/cyr_caps.jpg, test_files/latin.jpg, test_files/latin_caps.jpg
+
+Sources are in VFB format (FontLab, proprietary), which is not buildable with gftools-builder.
+
+## Investigation Details
Underdog was designed by Sergey Steblina and technically engineered and published by Jovanny Lemonad (lemonad@jovanny.ru). It is an informal display typeface with Cyrillic and Latin support.
4. **alexeiva GitHub**: Examined as a related Russian type designer with Cyrillic fonts on Google Fonts, but no Underdog repository was found.
5. **Repository name search**: Searches for "underdog font", "underdog cyrillic", and related terms returned no font source repositories.
-### Status
-
-No canonical upstream repository with UFO or Glyphs sources was found. No source block was added to `METADATA.pb`.
-
-### Conclusion
-
Underdog was published to Google Fonts in 2012 but the source files have not been made publicly available on GitHub or any other discoverable platform. Neither of the two credited designers has published font source repositories under their GitHub accounts.