--- /dev/null
+# Investigation: IM Fell Great Primer SC
+
+## Summary
+
+| Field | Value |
+|-------|-------|
+| Family Name | IM Fell Great Primer SC |
+| Slug | im-fell-great-primer-sc |
+| License Dir | ofl |
+| Repository URL | https://github.com/librefonts/imfellgreatprimersc |
+| Commit Hash | unknown |
+| Config YAML | none |
+| Status | no_config_possible |
+| Confidence | HIGH |
+
+## Source Data (METADATA.pb)
+
+```
+No source block
+```
+
+## Investigation
+
+The METADATA.pb for IM Fell Great Primer SC (at `google/fonts/ofl/imfellgreatprimersc/METADATA.pb`) contains no source block. The family was added in the initial commit to google/fonts (commit `90abd17b4`, dated 2015-03-07 by Dave Crossland).
+
+The upstream repository was identified as `https://github.com/librefonts/imfellgreatprimersc` (confirmed by examining the cached repo at `upstream_repos/fontc_crater_cache/librefonts/imfellgreatprimersc/`).
+
+The librefonts/imfellgreatprimersc repository contains only TTX-decompiled font files:
+- `IMFeGPsc28P.ttf.ttx` (and split per-table `.ttx` files)
+
+There are no gftools-builder-compatible sources (no `.glyphs`, `.ufo`, or `.designspace` files). The `src/` directory contains only `METADATA_comments.txt` and `VERSIONS.txt`. The SC (Small Caps) variant is a companion to IM Fell Great Primer, designed by Igino Marini.
+
+The HEAD commit of the upstream repo is `beb2648c0d5952f43287c5638f6613de64fbfccf` (message: "update .travis.yml").
+
+Because the upstream repository only contains TTX decompiled sources and no gftools-builder-compatible source files, it is not possible to add a meaningful `config_yaml` for automated rebuilds.
+
+## Conclusion
+
+No source block can be completed for IM Fell Great Primer SC. The upstream repository (`librefonts/imfellgreatprimersc`) only contains TTX-decompiled sources. Status: `no_config_possible`. A source block with `repository_url` only could be added to document the upstream location, but no `config_yaml` is available.