Restore auto version bump in publish workflow

.github/workflows/publish.yml

@@ -10,11 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     permissions:
-      contents: read
+      contents: write
       id-token: write
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - uses: oven-sh/setup-bun@v2
 
@@ -24,8 +26,42 @@ jobs:
 
       - run: bun install --frozen-lockfile
 
+      - name: Determine version bump
+        id: bump
+        run: |
+          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
+          if [ -z "$LAST_TAG" ]; then
+            COMMITS=$(git log --format="%s" --no-merges)
+          else
+            COMMITS=$(git log "${LAST_TAG}..HEAD" --format="%s" --no-merges)
+          fi
+
+          if echo "$COMMITS" | grep -qiE "^[a-z]+(\(.+\))?!:|BREAKING CHANGE"; then
+            BUMP=major
+          elif echo "$COMMITS" | grep -qiE "^feat(\(.+\))?:"; then
+            BUMP=minor
+          else
+            BUMP=patch
+          fi
+
+          echo "type=$BUMP" >> "$GITHUB_OUTPUT"
+          echo "Bump type: $BUMP"
+
+      - name: Bump version
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          npm version ${{ steps.bump.outputs.type }} --no-git-tag-version
+          VERSION=$(node -p "require('./package.json').version")
+          git add package.json
+          git commit -m "chore: release v${VERSION}"
+          git tag "v${VERSION}"
+
       - name: Build
         run: bun run build
 
       - name: Publish
         run: npm publish --access public
+
+      - name: Push version bump
+        run: git push --follow-tags