seniorClean Architecture
Handling File I/O in Clean Architecture.
Updated Apr 28, 2026
Short answer
Treat File Systems as external tools; use an Interface in the Domain to represent file storage.
Deep explanation
Just like a database, the file system is a detail. If a Use Case needs to save an image, it should use a FileStorage interface. The implementation can be Local Storage, AWS S3, or an In-Memory buffer for testing.
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