snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

.claude/rules/python.md

@@ -0,0 +1,20 @@
+---
+paths:
+  - "**/*.py"
+---
+
+# Python Code
+
+- Don't use `Any` type annotations without comments justifying it.
+- Don't use `cursor.execute()` with string formatting (SQL injection risk)
+- Don't use `.extra()` in Django without careful review and commenting
+- Don't create N+1 query patterns:
+
+  ```python
+  # BAD
+  for bar in bars:
+      foo = Foo.objects.get(id=bar.foo_id)
+
+  # GOOD
+  foos = {f.id: f for f in Foo.objects.filter(id__in=[b.foo_id for b in bars])}
+  ```