You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
AttachmentsArea: what it touches
ImprovementsKind: in v2.1.287,
ImprovementsSection of the release
What
Claude Code has a new way of uploading images and files. Before an image is sent, oversize PNG, JPEG and WebP images can now be scaled down, with a limit of 40,000,000 pixels. If an image cannot be scaled, Claude Code logs a note and sends the image at its original size. Files are sent in pieces rather than all at once.
Separately, when an MCP server sends back an image, it now goes through a new image-handling step first. An MCP server is an outside program that gives Claude Code extra tools through the Model Context Protocol. Before, such images went straight to the general image handler.
Why
This changes how large images and files are uploaded, so very large pictures may arrive smaller than the originals.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear which features use the new upload path, or whether MCP images go through the scaling step.
