chore: build size check comment on PR

.github/workflows/build-unitycloud.yml

@@ -418,8 +418,8 @@ jobs:
         id: size_check
         env:
           # Per-target absolute caps (MB)
-          MAX_MACOS_MB: 370
-          MAX_WINDOWS64_MB: 280
+          MAX_MACOS_MB: 410
+          MAX_WINDOWS64_MB: 320
 
           # Per-platform delta thresholds (MB); 0 = disabled
           DELTA_MACOS_MB:   ${{ github.event.inputs.delta_threshold_macos_mb   || inputs.delta_threshold_macos_mb   || '0' }}
@@ -528,10 +528,36 @@ jobs:
             fi
           } >> "$GITHUB_STEP_SUMMARY"
 
+          # Export key values so the PR comment workflow can include them
+          echo "size_mb=$MB_DEC" >> "$GITHUB_OUTPUT"
+          echo "size_mib=$MIB_BIN" >> "$GITHUB_OUTPUT"
+          echo "cap_mb=${MAX:-0}" >> "$GITHUB_OUTPUT"
+          echo "delta_mb=$DELTA_MB" >> "$GITHUB_OUTPUT"
+          echo "delta_pct=$DELTA_PCT" >> "$GITHUB_OUTPUT"
+          echo "release_tag=${RELEASE_TAG:-}" >> "$GITHUB_OUTPUT"
+          echo "result=$RESULT" >> "$GITHUB_OUTPUT"
+
           # Enforce (fail the job) only if toggles are true
           if [ "$CAP_EXCEEDED" = true ] && [ "${ENFORCE_CAP}" = "true" ]; then exit 1; fi
           if [ "$DELTA_EXCEEDED" = true ] && [ "${ENFORCE_DELTA}" = "true" ]; then exit 1; fi
 
+      - name: Save size report
+        if: always() && steps.size_check.outputs.result != ''
+        run: |
+          mkdir -p size_report
+          {
+            echo "release_tag=${{ steps.size_check.outputs.release_tag }}"
+            echo "| ${{ matrix.target }} | ${{ steps.size_check.outputs.size_mb }} / ${{ steps.size_check.outputs.size_mib }} | ${{ steps.size_check.outputs.cap_mb }} | ${{ steps.size_check.outputs.delta_mb }} | ${{ steps.size_check.outputs.delta_pct }} | ${{ steps.size_check.outputs.result }} |"
+          } > size_report/size_report_${{ matrix.target }}.md
+
+      - name: Upload size report
+        if: always() && steps.size_check.outputs.result != ''
+        uses: actions/upload-artifact@v4
+        with:
+          name: size_report_${{ matrix.target }}
+          path: size_report/
+          if-no-files-found: warn
+
       - name: Set SHA, branch, and build prefix
         run: |
           echo "SHA_SHORT=$(echo ${{ needs.prebuild.outputs.commit_sha }} | cut -c1-7)" >> $GITHUB_ENV

.github/workflows/pr-comment-artifact-url.yml

@@ -10,7 +10,7 @@ on:
       - "Unity Cloud Build"
     branches-ignore:
       - "main"
-
+  workflow_dispatch:
 permissions:
   contents: read  
   pull-requests: write
@@ -109,6 +109,41 @@ jobs:
           echo "Build done on: $BUILD_DATE"
           echo "BUILD_DATE=$BUILD_DATE" >> "$GITHUB_ENV"
 
+      - name: Download size reports
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+          OWNER: ${{ github.repository_owner }}
+          REPO: ${{ github.event.repository.name }}
+        run: |
+          gh run download "$PREVIOUS_JOB_ID" \
+            --repo "$OWNER/$REPO" \
+            --name size_report_windows64 \
+            --dir size_reports 2>/dev/null || true
+          gh run download "$PREVIOUS_JOB_ID" \
+            --repo "$OWNER/$REPO" \
+            --name size_report_macos \
+            --dir size_reports 2>/dev/null || true
+
+          WINDOWS_ROW=$(grep "^|" size_reports/size_report_windows64.md 2>/dev/null || true)
+          MACOS_ROW=$(grep "^|" size_reports/size_report_macos.md 2>/dev/null || true)
+          RELEASE_TAG=$(grep "^release_tag=" size_reports/size_report_windows64.md size_reports/size_report_macos.md 2>/dev/null | head -1 | cut -d= -f2 || true)
+
+          if [ -n "$WINDOWS_ROW" ] || [ -n "$MACOS_ROW" ]; then
+            {
+              echo "SIZE_REPORT<<EOF"
+              echo "### Artifact size check"
+              echo ""
+              echo "| Target | Size (MB / MiB) | Cap (MB) | Δ MB vs release | Δ % vs release | Result |"
+              echo "|--------|----------------:|--------:|----------------:|---------------:|--------|"
+              [ -n "$WINDOWS_ROW" ] && echo "$WINDOWS_ROW"
+              [ -n "$MACOS_ROW" ] && echo "$MACOS_ROW"
+              [ -n "$RELEASE_TAG" ] && echo "" && echo "_Comparing against: **${RELEASE_TAG}**_"
+              echo "EOF"
+            } >> "$GITHUB_ENV"
+          else
+            echo "SIZE_REPORT=" >> "$GITHUB_ENV"
+          fi
+
       - name: Find Comment
         uses: peter-evans/find-comment@v2
         id: find-comment
@@ -130,10 +165,10 @@ jobs:
           comment-id: ${{ steps.find-comment.outputs.comment-id }}
           edit-mode: replace
           body: |-
-            ![badge]  <img src="https://ui.decentraland.org/decentraland_256x256.png" width="30"> 
-            
+            ![badge]  <img src="https://ui.decentraland.org/decentraland_256x256.png" width="30">
+
             Windows and Mac build successful in Unity Cloud! You can find a link to the downloadable artifact below.
-            
+
             | Name                | Link                    |
             | --------            | ----------------------- |
             | Commit              | ${{ env.HEAD_SHA }}     |
@@ -144,6 +179,8 @@ jobs:
             | Download Mac S3     | ${{ env.MAC_ARTIFACT_S3_URL }} |
             | Built on            | ${{ env.BUILD_DATE }} |
 
+            ${{ env.SIZE_REPORT }}
+
             [badge]: https://img.shields.io/badge/Build-Success!-3fb950?logo=github&style=for-the-badge
 
   comment-failed: