Free AI skills for Claude, Codex, and Cursor
PromptBuild is a free library of more than 1,000 ready-made AI skills. Download a skill, install it once, and your AI uses it whenever your request fits. Every skill also works as a Cursor rule, a section for your repo's AGENTS.md, or a fill-in prompt for ChatGPT, Claude, and Gemini.
Why PromptBuild
- Install once, use forever: skills use the open SKILL.md format, so the same file works in Claude.ai, Claude Code, and Codex.
- Every coding agent: download any skill as a Cursor rule (.mdc) or copy it as an AGENTS.md section.
- Skills for every task: writing, marketing, coding, careers, and more, organised by topic.
- Prefer to fill in the blanks? Every skill is also a prompt template with interactive fields, dropdowns, and toggles.
How it works
- Find a skill by topic or search.
- Download it for Claude or Codex, or as a Cursor rule or AGENTS.md section.
- Ask your AI for the task. It loads the skill when your request matches.
Frequently asked questions
What is PromptBuild?
PromptBuild is a free library of ready-made AI skills and prompt templates. Download a skill for Claude or Codex (or as a Cursor rule or AGENTS.md section) and your AI uses it whenever your request fits, or fill in a prompt template and paste it into ChatGPT, Claude, or Gemini.
What is an AI skill?
A skill is a set of instructions your AI keeps and follows on its own. Skills use the open SKILL.md format, so the same file works in Claude and Codex. Install one once and it loads when your request matches, asks for anything it is missing, and does the work.
Is PromptBuild free to use?
Yes. You can browse, copy, and customize community prompt templates, and build and save your own dynamic prompts, for free.
Which AI models does PromptBuild work with?
PromptBuild produces plain-text prompts you can paste into any AI assistant, including ChatGPT, Claude, Gemini, Copilot, and open-source models.
What is a dynamic prompt template?
A dynamic prompt template is a reusable prompt with interactive inputs, such as text fields, dropdowns, multi-selects, and toggles, that let you tailor the prompt to each task without editing the underlying wording.
Can I share the prompts I build?
Yes. You can publish prompts to the public Discover feed with a shareable link, or keep them private to your account.
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