Nio config validator + connectivity check. Use when the user wants to validate their Nio setup — e.g. "run nio doctor", "is my nio config valid / working", "test my OAuth / external endpoint / LLM connectivity", "why isn't my scorer firing". Focused single-purpose skill; for other Nio operations use /nio.
$npx -y skills add core0-io/nio --skill nio-doctorInstalls into the current project.
Run `npx skills use "https://github.com/core0-io/nio" --skill "core0-io/nio/nio-doctor"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/core0-io/nio" that are relevant to the current task. Run `npx skills add "https://github.com/core0-io/nio"` and select the relevant skills, then follow their instructions.