# Startup Skills: Stanislas Polu > Every skill by Stanislas Polu in the index, with a line saying when to use each one. I index these, I do not host them. Every entry points at the original author's repo and carries a source byline. ## Entries (1) - [Code contracts](https://github.com/spolu/code-contracts/blob/main/skills/code-contracts/SKILL.md) by Stanislas Polu: Use when defining or enforcing @cc code contracts across a codebase. ## Links - [Page](https://startupskills.dev/spolu): the same list, for a person. - [The whole index](https://startupskills.dev/llms.txt): all 189 entries. - [Skills index](https://startupskills.dev/skills): every skill, with search.