# Startup Skills: Johannes Mutter > Every skill by Johannes Mutter 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 (2) - [Build comments](https://github.com/johannesmutter/interface-skills/tree/main/skills/build-comments) by Johannes Mutter: Use when adding comments, replies, reactions or annotation to a product. - [Review comments](https://github.com/johannesmutter/interface-skills/tree/main/skills/review-comments) by Johannes Mutter: Use when an existing comment thread implementation needs judging against a high bar. ## Links - [Page](https://startupskills.dev/johannesmutter): 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.