You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
API ErrorsArea: what it touches
ImprovementsKind: in v2.1.261,
ImprovementsSection of the release
The API error schema gains a new claude_code_version_too_old error code, sent when the API refuses a request because the Claude Code build is below a required minimum, whether a model-specific floor or an org-policy floor. The error's message text carries the details, and the remedy is updating Claude Code.
