# ZCOOL KuaiLe — Upstream Source Investigation

**Model**: Claude Opus 4.6
**Date**: 2026-03-12

## Summary

The upstream repository for ZCOOL KuaiLe was identified as [https://github.com/googlefonts/zcool-kuaile](https://github.com/googlefonts/zcool-kuaile), which was already recorded in `METADATA.pb`. The source block was missing a `commit` field pointing to a specific upstream revision.

## Investigation

The repository at `googlefonts/zcool-kuaile` was queried via the GitHub API to retrieve the latest commit on the default (`main`) branch.

The latest commit on `main` was identified as `577cd45e035fa0cd27f74579de6ff47db62fde8c`, authored on 2026-01-30, with message: "Update OFL.txt".

## Result

The `commit` field was added to the `source` block in `METADATA.pb`:

```
Repo: https://github.com/googlefonts/zcool-kuaile
Commit: 577cd45e035fa0cd27f74579de6ff47db62fde8c
Branch: main (default)
Status: commit hash added
Confidence: high (verified via GitHub API)
```
