Single part at the root, COMPOSE_FILE in .env

template/.pre-commit-config.yaml.jinja

@@ -1,7 +1,17 @@
 repos:
   - repo: local
-    hooks:{% if not parts %} []{% endif %}
-{% for part in parts %}      - id: {{ part }}-fmt
+    hooks:{% if layout == 'parts' and not parts %} []{% endif %}
+{% if layout == 'single' %}      - id: fmt
+        name: fmt
+        entry: make fmt
+        language: system
+        pass_filenames: false
+      - id: check
+        name: check
+        entry: make check
+        language: system
+        pass_filenames: false
+{% endif %}{% for part in parts %}      - id: {{ part }}-fmt
         name: {{ part }} fmt
         entry: make -C {{ part }} fmt
         language: system