Unclear It is not clear when the new naming option is used.
What
When Claude Code fetches an attached file, such as an image, it saves it locally under a generated name. That step now has an extra option. When it is on, the name comes from a different rule applied to the file's ID. When it is off, the name is the first 8 characters of the file's ID, or a random ID for images, as before.
Why
File names of downloaded attachments may differ from what you saw before.
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The writer flagged doubt
It is not clear when the new naming option is used.