-Font was designed by Wojciech Kalinowski (wmk69). No source repository URL was recorded in METADATA.pb. The family was added to Google Fonts in 2011.
+# Modern Antiqua — Source Repository Investigation
-**Repo:** unknown
-**Commit:** unknown
-**Config:** none
-**Status:** No upstream source recorded
-**Confidence:** Low
+**Model**: Claude Opus 4.6
+
+## Source Repository
+
+| Field | Value |
+|-------|-------|
+| Repository | [wmk69/Modern-Antiqua](https://github.com/wmk69/Modern-Antiqua) |
+| Commit | `f88d41ebebb9614874068d3142b6af52b707e917` |
+| Date | 2022-03-13 |
+| Confidence | High |
+
+## Investigation
+
+The METADATA.pb for Modern Antiqua had no source block. The upstream repository was identified as wmk69/Modern-Antiqua, by designer Wojciech Kalinowski (wmk69).
+
+### Source Types Available
+
+- **SFD** (FontForge): `ModernAntiqua-Book.sfd`, `ModernAntiqua-Bold.sfd`, `ModernAntiqua-BookOblique.sfd`, `ModernAntiqua-BoldOblique.sfd`
+- **Binary TTF**: Matching TTF files for all four styles
+- **Documentation**: `FONTLOG.txt`, PDF specimens for each style
+
+### Buildability
+
+SFD-only sources. The gftools-builder toolchain does not support SFD as an input format. Not directly buildable with gftools-builder.
+
+### Notes
+
+- The designer's repo contains an expanded 4-style family (Book, Bold, BookOblique, BoldOblique), while Google Fonts only serves the Book weight
+- The repo was created in 2022, well after the font was originally added to Google Fonts (2011), and represents a newer version of the family
+- The single commit `f88d41e` (2022-03-13, "Add files via upload") contains all files
+- No existing `config.yaml` in either the upstream repo or the google/fonts family directory
+
+### Actions Taken
+
+A source block was added to METADATA.pb pointing to commit `f88d41e` at wmk69/Modern-Antiqua, which is the designer's own repository with the canonical SFD sources.