dify/api/agent-notes/services/app_asset_service.py.md

Summary:

• App asset CRUD, publish/build pipeline, and presigned URL generation.

Invariants:

• Asset storage access goes through AppAssetStorage + AssetPath, using app_asset_storage singleton.
• Tree operations require tenant/app scoping and lock for mutation.
• Asset zips are packaged via raw storage with storage keys from AppAssetStorage.

Edge Cases:

• File nodes larger than preview limit are rejected.
• Deletion runs asynchronously; storage failures are logged.

Tests:

• Unit tests for storage URL generation and publish/build flows.