What
MCP servers are connections that give Claude Code extra tools. When one of those tools returns an image, Claude Code now also saves it to a file. If the save works, a short note with the image's size and file path is added after the image. If saving is turned off or fails, only the image is returned.
Why
Claude can refer to the image by its file path, for example to pass it to another tool.
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It is not confirmed whether earlier versions already saved these images some other way.