Under the hood
A dead code path's switch statement dropped an unused apiKeyHelper case
What
Inside a function that is already unreachable (guarded by a condition that is always false), the case "apiKeyHelper" branch was removed from a switch statement that also handles "none", "ANTHROPIC_API_KEY", and /login managed key.
Why
Since this code path never runs, this is a cleanup of dead code rather than a behavior change. It does not affect the apiKeyHelper setting itself, which is used elsewhere to generate API credentials.