About PromptBuild
PromptBuild is a free library of ready-made AI skills. A skill teaches your AI how to do one task well, so you install it once instead of rewriting the same instructions over and over.
Every skill uses the open SKILL.md format, so it works in Claude and Codex, and it also downloads as a Cursor rule or a section for your repo's AGENTS.md. Prefer to fill in the blanks yourself? Every skill is also a prompt template with interactive fields, dropdowns, and toggles for ChatGPT, Claude, and Gemini.