claudetool: add "related files" detection to codereview tool
diff --git a/claudetool/testdata/vet_error_test.txtar b/claudetool/testdata/vet_error_test.txtar
index 8c9dc64..0163a81 100644
--- a/claudetool/testdata/vet_error_test.txtar
+++ b/claudetool/testdata/vet_error_test.txtar
@@ -21,6 +21,8 @@
Add vet error
-- .run_test --
+# Errors
+
Test regressions detected between initial commit (656e4d573cb77a30ebce29ebb974533ece282946) and HEAD:
1: sketch.dev: Previously had no tests, now has build/vet errors