You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
What
When your API traffic goes through a gateway, Claude Code labels the responses with which gateway it was. It now recognizes Bifrost, by an x-bifrost- response header prefix, and Databricks, by hostnames ending in .cloud.databricks.com, in addition to litellm, helicone, portkey, cloudflare, kong and braintrust. litellm also now reports its version from a dedicated header.
Details
Detection is passive: headers and hostname only, nothing is sent to the gateway to ask.
Evidence
x-bifrost-
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
