s4h-constraint-hardness-testing

Run `npx skills use "https://github.com/human-avatar/skills-for-humanity" --skill "human-avatar/skills-for-humanity/s4h-constraint-hardness-testing"` 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/human-avatar/skills-for-humanity" that are relevant to the current task. Run `npx skills add "https://github.com/human-avatar/skills-for-humanity"` and select the relevant skills, then follow their instructions.