Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
APIArea: what it touches
Internal ChangesKind: in v2.1.287,
Internal ChangesSection of the release
What
ANTHROPIC_CUSTOM_HEADERS is an environment variable for adding your own headers to Claude Code's requests. Claude Code already read an Authorization header from it. It now reads that header through the same shared parser it uses for the rest of the variable.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat Claude Code does differently when the remote environment type is self_hosted is not shown.
Anthropic's release notes agreeBedrock, Vertex, Mantle: Fixed model availability checks under CLAUDE_CODE_SKIP_*_AUTH sending a different Authorization header than real…
