--- /dev/null
+# Tai Heritage Pro — Source Metadata Investigation
+**Model**: Claude Opus 4.6
+**Date**: 2026-03-12
+
+## Source Repository
+- **URL**: https://github.com/silnrsi/font-taiheritagepro
+- **Commit**: `1ac0dd04cf5dd23435f37cecfe825e0eaf230a4c`
+- **Status**: Commit hash was added to existing source block
+
+## What Was Done
+The source block in METADATA.pb already contained a repository_url, archive_url pointing to the v2.600 release, and a branch field. The commit hash corresponding to the v2.600 release tag was retrieved from the GitHub API (`refs/tags/v2.600` points directly to commit `1ac0dd04cf5dd23435f37cecfe825e0eaf230a4c`). The commit field was added to the source block. The hash was verified via `gh api repos/silnrsi/font-taiheritagepro/commits/{hash}`.
+
+## Notes
+- The source block uses an archive_url referencing the v2.600 release zip rather than direct file references from the repository tree. The commit hash recorded corresponds to the tagged release commit.
+- Repository is maintained by SIL International.