What probably matters to youSection of the release
What
A custom OAuth endpoint is now recognised purely from the CLAUDE_CODE_CUSTOM_OAUTH_URL environment variable, with the secondary fallback check removed. The same variable is also registered in the list the subprocess environment builder knows about, so it is carried as a recognised Claude Code variable when Claude Code spawns commands.
Details
Setting CLAUDE_CODE_CUSTOM_OAUTH_URL is the only way to be treated as having a custom OAuth endpoint; unset means the standard endpoint is used.
The variable is now a known name to the code that assembles environment variables for spawned subprocesses, rather than an unrecognised passthrough.
Nothing else in this build shows what a spawned process does with the value once it receives it.
