Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ProjectsArea: what it touches
Internal ChangesKind: in v2.1.304,
Internal ChangesSection of the release
Unclear What reads CLAUDE_CODE_ATTRIBUTION_PROJECT once it is passed on, and so what setting it changes for a reader, is not known.
What
When Claude Code builds the list of environment variables it passes on to processes it starts, it now always includes CLAUDE_CODE_ATTRIBUTION_PROJECT. An environment variable is a named value that a program can read from its surroundings. If you have not set this one, it is passed along with an empty value.
Why
This gives sessions started by Claude Code a way to carry a project label for attribution, meaning a record of which project the work belongs to.
