Under the hood
Claude Code now explains more clearly why a background process failed to start
What
A new internal function reads the error text (stderr) produced when a background launcher or daemon process fails to start, and works out a reason for the failure: an exit code, a signal name, a generic launcher failure marked with a <daemon-stderr> tag, an error that mentions a file path, or a fallback 'other' reason when none of those match.
Why
This makes failures of background processes easier to diagnose, since the underlying error is categorized into a specific reason instead of being reported generically.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding does not say where this categorized reason is surfaced to the user, only that it is computed.