Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
Internal ChangesKind: in v2.1.299,
Internal ChangesSection of the release
What
When Claude Code uploads a file, it can now add an x-claude-code-upload-lane header, a short label sent with the request, if the upload was given a lane. The other upload headers are unchanged.
Why
The header is a routing hint the server can see and use to handle different kinds of uploads separately.
