chunking-numeric-and-otp

Run `npx skills use "https://github.com/hdeibler/universal-design-principles" --skill "hdeibler/universal-design-principles/chunking-numeric-and-otp"` 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/hdeibler/universal-design-principles" that are relevant to the current task. Run `npx skills add "https://github.com/hdeibler/universal-design-principles"` and select the relevant skills, then follow their instructions.