jason810496 opened a new issue, #74060:
URL: https://github.com/apache/airflow/issues/74060

   Dag discovery accepts a packaged Dag whose name ends in `.ZIP` (the suffix 
check ignores letter case), but `ZIP_REGEX` in 
`airflow-core/src/airflow/utils/file.py` only matches a lowercase `.zip` path 
segment. So `correct_maybe_zipped` and `open_maybe_zipped` do not treat 
`reports.ZIP/dag.py` as a path inside an archive: reading the Dag's source back 
(for example `DagCode`) fails with `NotADirectoryError`. Either match the 
suffix case-insensitively or list only lowercase `.zip`.
   
   ---
   
   Drafted with Claude Code (Opus 5.5).
   


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