diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a25748a..41cb9b0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,6 +67,20 @@ jobs:
         if: steps.changed.outputs.lint_files != ''
         run: yarn lint ${{ steps.changed.outputs.lint_files }}
 
+      - name: Package name length check
+        if: steps.codemods.outputs.dirs != ''
+        run: |
+          failed=0
+          for dir in ${{ steps.codemods.outputs.dirs }}; do
+            name=$(node -p "require('./$dir/package.json').name")
+            len=${#name}
+            if [ "$len" -gt 50 ]; then
+              echo "::error::Package name '$name' is $len chars (max 50 for Codemod registry)"
+              failed=1
+            fi
+          done
+          [ "$failed" -eq 0 ] || exit 1
+
       - name: Test (changed codemods)
         if: steps.codemods.outputs.dirs != ''
         run: |