-# Share Tech Mono — Upstream Source Investigation
+# Share Tech Mono -- Upstream Source Investigation
-**Designer**: Carrois Apostrophe
**Model**: Claude Opus 4.6
-**Date**: 2026-03-12
-## Summary
+## Source Repository
-No canonical upstream repository with font sources was found for Share Tech Mono on GitHub. Searches for `ShareTechMono` found only LibreFonts mirrors and bower mirror repositories, none of which were canonical sources.
+Design sources were found in the **googlefontdirectory-hg** archive (Google Font Directory, Mercurial-era).
+
+- **Repository**: googlefontdirectory-hg
+- **Commit**: `52f780bc9d197280a9f430574e179a5f233c56b6`
+- **Source path**: `sharetechmono/src/`
+
+## Source Files
+
+The source directory contains: 2 VFB files (FontLab, proprietary format); 4 compiled binaries (OTF/TTF, not design 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
+
+- `ShareTechMono-Regular.vfb` (VFB, proprietary)
+- `expertset/ShareTechMonoExp-Regular.vfb` (VFB, proprietary)
+- `ShareTechMono-Regular.otf` (compiled binary)
+- `ShareTechMono-Regularo.ttf` (compiled binary)
+- `expertset/ShareTechMonoExp-Regular.otf` (compiled binary)
+- `expertset/ShareTechMonoExp-Regular.ttf` (compiled binary)
+
+## Designer
+
+Carrois Apostrophe
## Search Results
- `librefonts/sharetechmono` skipped (mirror, not canonical source)
- Note: `m4rc1e/ShareTech` was found for the Share Tech family but does not include Mono sources
- No Carrois-maintained repository with Share Tech Mono source files was found
-
-## Outcome
-
-No source block was added to METADATA.pb. No public source repository with design files for Share Tech Mono was found.