prompts
prompts.chat: 171,000 Stars and the Biggest Free Prompt Library There Is
An open-source prompt library that works in ChatGPT and Claude, free under CC0, with a Claude Code plugin that installs the whole thing so your assistant picks the prompt for you. What is actually in it, how to use it well, and where it falls short.
prompts.chat is a free, open-source prompt library that calls itself "the world's largest open-source prompt library for AI", and at roughly 171,000 stars on GitHub it has a decent claim to it. It works in ChatGPT and Claude, the prompts are released under CC0 so you can use them for anything, and there's a Claude Code plugin that loads the entire library so your assistant picks the right prompt without you searching.
It used to be called Awesome ChatGPT Prompts, which is how a lot of people already know it.
What's actually in it?
A searchable collection of role prompts, each one written to turn the assistant into a specific kind of expert before you ask your question.
The interaction is as simple as it looks. Type what you want, take the prompt, paste it in. Search "lawyer" and you get the one that sets the assistant up as a legal adviser. Search "travel" and you get the itinerary planner.
The interview one is the example I'd give someone who thinks prompts are a gimmick. It makes the assistant behave like a hiring manager and actually grill you, one question at a time, rather than handing you a list of tips about interviews. That difference, between being told about a thing and being put through it, is most of what a good prompt buys you.
What does it cost, and what's the catch?
Nothing, and there genuinely isn't much of one.
The code and site are MIT licensed and the prompt content is CC0, which is as close to public domain as a licence gets. You can use the prompts commercially, put them in your own product, modify them, and you owe nobody anything. You can also self-host the whole library if you want it inside an organisation with no outside calls.
That's worth holding against the prompt packs being sold in marketplaces, which are frequently the same public prompts with a price on them. If you've ever been tempted by one, check here first.
The part most people miss
There's a Claude Code plugin, and it changes the tool from a website you visit into something your assistant just has.
Two lines:
/plugin marketplace add f/prompts.chat
/plugin install prompts.chat@prompts.chatAfter that the library is available to Claude directly, and it selects the appropriate prompt for what you're doing instead of you going to look. It also runs as an MCP server if you want to wire it into something else.
This is the bit worth doing even if you never open the site again. Searching a library is a task you have to remember to do. A library your assistant can already see is one you stop thinking about.
How I'd actually use it
Three things, learned by using it badly first.
Treat them as starting points, not scripts. These prompts are written to be general enough to work for everyone, which means none of them are written for you. Take the one that's close, then add your own context, constraints and examples. The prompt is the frame; you still have to put something in it.
Steal the structure more than the words. What most of the good ones do is assign a role, set a constraint, and specify a format. Once you notice that shape you stop needing the library for anything routine, because you can write one in fifteen seconds.
Use it for the modes you'd never think to ask for. Nobody wakes up thinking "I'd like to be cross-examined about my own business plan today." The value of a big library is in the prompts you wouldn't have thought of, so browse it occasionally rather than only searching it when stuck.
FAQ
Is prompts.chat really free?
Yes. The site and code are MIT licensed and the prompts are CC0, so you can use them commercially and modify them without owing anyone.
Does prompts.chat work with Claude as well as ChatGPT?
Yes, the prompts work in both. There's also a Claude Code plugin that loads the whole library, so Claude picks the right prompt for you.
How do I install the prompts.chat Claude Code plugin?
Run /plugin marketplace add f/prompts.chat, then /plugin install prompts.chat@prompts.chat. It also runs as an MCP server if you want to connect it elsewhere.
Should I use prompts.chat prompts exactly as written?
Treat them as starting points. They're written to work for everyone, so add your own context and constraints, and cut down any that feel overwritten for current models.
Where it falls short
Two honest limits.
It's a library of role prompts, so it's strongest at "act as X" and weakest at anything needing your actual data, your files or a multi-step task. That's a different tool.
And size cuts both ways. Community submissions mean quality varies, and a prompt written eighteen months ago for a much weaker model can be more elaborate than current models need. The newest models often do better with a clear plain request than with an ornate persona. If a prompt feels like it's performing, cut it down and see if the answer gets worse. Often it doesn't.
That's the real skill underneath all of this, and no library gives it to you. But 171,000 people did not star a repository of nothing, and for free, under CC0, with a plugin that installs it into the thing you already use, it's an easy yes.
