soljourner/nist-refprop
Query high-accuracy thermodynamic properties from NIST REFPROP database (commercial)
npx skills add https://github.com/Soljourner/claude-engineering-skills --skill nist-refprop
Take soljourner/nist-refprop from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.
The instructions reference pip.
Without those the skill loads but fails at the first command.