You'll notice
Subprocess launch failures from null bytes in args or environment now get a specific diagnosis
What
When Node.js rejects launching a subprocess with an ERR_INVALID_ARG_VALUE error, Claude Code's execFileNoThrow helper now figures out whether the cause was a null byte in the working directory, the executable path, a command-line argument, an environment variable name, or an environment variable value. For environment variables specifically, it also reports whether the offending variable came from the process's inherited environment.
Why
This turns a generic subprocess-launch failure into a specific, actionable diagnosis, making it much easier to track down what actually caused the failure.