Under the hood
Internal renaming in the prompt input bar and artifact auto-react code, no behavior change found
What
Two internal code sections, the prompt input bar and the artifact watch/auto-react supervisor (which reacts automatically to file changes), were largely rewritten with renamed internal variables, such as a memoization array renamed from one short name to another. No change in behavior was identifiable from this.
Why
This kind of renaming is typically a byproduct of the build process and shouldn't change how Claude Code behaves for you.