You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
AuthArea: what it touches
ImprovementsKind: in v2.1.227,
ImprovementsSection of the release
What
Three specific one-line messages replace a single generic one, so a bad value points at its own source: "Invalid auth token · Fix external auth token", "Invalid ANTHROPIC_CUSTOM_HEADERS · Fix the environment variable", and "Invalid request header from the environment · Fix the environment variable".
Details
Which message you get depends on whether the offending value came from ANTHROPIC_CUSTOM_HEADERS or from another header source.
Evidence
Invalid ANTHROPIC_CUSTOM_HEADERS · Fix the environment variable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
