Rationale: add source block to METADATA.pb

Assisted by an AI agent (Claude Opus 4.6)

diff --git a/ofl/rationale/METADATA.pb b/ofl/rationale/METADATA.pb
index 9cb91dc5ed893c37edb9d4249b0cfff8a80262bf..dbbb09e7e68315fdac5197868e5759cdc1a2057b 100644 (file)
--- a/ofl/rationale/METADATA.pb
+++ b/ofl/rationale/METADATA.pb
@@ -14,5 +14,9 @@ fonts {
 }
 subsets: "menu"
 subsets: "latin"
+source {
+  repository_url: "https://github.com/cyrealtype/Rationale"
+  commit: "b12941da538d15c94bc04f60926288a791d5a81c"
+}
 stroke: "SANS_SERIF"
 classifications: "DISPLAY"

diff --git a/ofl/rationale/upstream_info.md b/ofl/rationale/upstream_info.md
new file mode 100644 (file)
index 0000000..b68f951
--- /dev/null
+++ b/ofl/rationale/upstream_info.md
@@ -0,0 +1,20 @@
+# Rationale — Source Metadata Investigation
+
+**Model**: Claude Opus 4.6
+**Date**: 2026-03-12
+
+## Source Repository
+
+- **URL**: https://github.com/cyrealtype/Rationale
+- **Owner**: cyrealtype (Cyreal)
+- **Branch**: master
+- **Latest commit**: `b12941da538d15c94bc04f60926288a791d5a81c` (2023-05-11)
+- **Source format**: Glyphs (`Rationale.glyphs`)
+
+## What Was Done
+
+The canonical upstream repository at `cyrealtype/Rationale` was located by searching GitHub for the designer name (Cyreal) and font name. The repository was confirmed to contain a Glyphs source file (`Rationale.glyphs`) in its `sources/` directory. The latest commit hash was verified via the GitHub API. A `source` block was added to `METADATA.pb` referencing the repository and commit.
+
+## Notes
+
+The repository also contains VFB files (legacy FontLab format), but the primary source is `Rationale.glyphs`. The copyright statement in METADATA.pb references `www.cyreal.org`, consistent with the `cyrealtype` GitHub organization.