Gate the full-set artifact on failure and add the keep_artifacts hatch

.github/workflows/unsloth-sd-prebuilt.yml

@@ -60,6 +60,11 @@ on:
         default: false
         required: false
         type: boolean
+      keep_artifacts:
+        description: 'Keep this run''s artifacts even if it publishes nothing (artifact-only test runs)'
+        default: false
+        required: false
+        type: boolean
 
 permissions:
   contents: read
@@ -647,12 +652,26 @@ jobs:
           done
           [ "$fail" = 0 ] || { echo "ERROR: refusing to publish a partial release" >&2; exit 1; }
 
+      # Only on a run that did NOT succeed, matching llama.cpp. Uploading this
+      # unconditionally duplicated every bundle in the run -- measured at 1.34 GiB
+      # per run, byte-for-byte the same content as the six -bin- artifacts beside
+      # it. On a green publish those bytes are already release assets, and
+      # reclaim below cannot delete this copy because an aggregate matches no
+      # single asset name, so it was the largest survivor of every cleanup.
+      #
+      # !success() rather than failure(): a cancelled run is exactly when a
+      # human wants the rescue bundle.
       - name: Upload full set (artifact fallback)
+        if: ${{ always() && !success() }}
         uses: actions/upload-artifact@v4
         with:
           name: unsloth-sd-prebuilt-${{ needs.resolve.outputs.tag }}
           path: dist/*
-          if-no-files-found: error
+          # warn, not error: an early failure can leave dist/ absent, and a
+          # missing debug bundle must not turn a diagnosable failure into a
+          # confusing second one.
+          if-no-files-found: warn
+          overwrite: true
           retention-days: 7
 
       - name: Publish GitHub release
@@ -782,7 +801,7 @@ jobs:
         # run's release. So the rule is simply that nothing will ever consume
         # these -- a publish:false dispatch is a test, and a cancelled or failed
         # run is not resumable past the missing legs -- and they are deleted.
-        if: ${{ needs.assemble.outputs.published != 'true' }}
+        if: ${{ needs.assemble.outputs.published != 'true' && inputs.keep_artifacts != true }}
         continue-on-error: true
         env:
           GH_TOKEN: ${{ github.token }}