--- /dev/null
+# Override config.yaml for ofl/trykker
+# The upstream sources/config.yaml lists the source as "Trykker" — missing
+# the .glyphspackage extension — so the build fails with "missing source
+# 'Trykker'". This override supplies the correct path (repo-root-relative).
+sources:
+ - sources/Trykker.glyphspackage
+familyName: "Trykker"
+buildVariable: false
+buildStatic: true
+buildTTF: true
+buildOTF: false
**Model**: Claude Opus 4.7 (1M context)
Added `config_yaml: "sources/config.yaml"` to the METADATA.pb `source { }` block. Direct inspection of the upstream repo at the pinned commit `5226cb07` (via the bare mirror in `upstream_repos/repo_archive/SorkinType/Trykker.git`) confirms that `sources/config.yaml` exists at that commit and is a valid gftools-builder config — it declares the `sources:` key. The family should move from the dashboard's "missing_config" bucket into "covered" once `google-fonts-sources` regenerates crater's `targets.json`.
+
+## fontc_crater Build Fix (2026-05-21)
+
+**Model**: Claude Opus 4.7
+
+### Initial state
+METADATA.pb pointed `config_yaml` at the upstream `sources/config.yaml`. That file's `sources:` list contains a single entry, `Trykker`, with no file extension, so the build failed with `missing source 'Trykker'`. (This also corrects the "Source Types: binary/TTX only / Buildable: No" note above — the repo does contain a Glyphs 3 package source.)
+
+### Investigation
+At the recorded commit `5226cb07` the font source is the Glyphs 3 package directory `sources/Trykker.glyphspackage`. The upstream `sources/config.yaml` is a gftools-builder template whose `sources:` entry was left as `Trykker`, missing the `.glyphspackage` extension. The recorded commit is correct.
+
+### Actions taken
+An override `config.yaml` was created in the family directory with the corrected, repo-root-relative source path `sources/Trykker.glyphspackage`. The `config_yaml` field was removed from METADATA.pb so google-fonts-sources auto-detects the override.
+
+### Final state
+The override `config.yaml` references `sources/Trykker.glyphspackage`, which exists at the recorded commit `5226cb07`.