fixup: workflows

Author: clason

.github/workflows/ci.yml

@@ -46,3 +46,28 @@ jobs:
         run: node scripts/build.js
       - name: Verify grammar consistency
         run: git diff --exit-code -- */src/grammar.json
+fuzz:
+    name: Fuzz parsers
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        parser: [tree-sitter-markdown, tree-sitter-markdown-inline]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 2
+      - name: Check for scanner changes
+        id: scanner-changes
+        run: |-
+          if git diff --quiet HEAD^ -- '${{matrix.parser}}/src/scanner.c'; then
+            printf 'changed=false\n' >> "$GITHUB_OUTPUT"
+          else
+            printf 'changed=true\n' >> "$GITHUB_OUTPUT"
+          fi
+      - name: Fuzz ${{matrix.parser}} parser
+        uses: tree-sitter/fuzz-action@v6
+        if: steps.scanner-changes.outputs.changed == 'true'
+        with:
+          directory: ${{matrix.parser}}