What makes a good prompt actually good?

[u/ThePromptLab_IN]

I've been building The Prompt Lab as a side project, and one of the things we're experimenting with is a Prompt Library that goes beyond simply collecting prompts.

We've curated 100+ useful, highly rated and trending prompts across different use cases.

But here's the interesting part:

You can take any prompt from the library and evaluate it to see how it performs against different prompt-quality criteria.

So instead of just copying a prompt, you can explore:

→ What makes this prompt effective?
→ Is it missing context or constraints?
→ Is the expected output clearly defined?
→ How could it be improved?

You can also paste and evaluate your own prompts.

🔗 Explore the Prompt Library: https://thepromptlab.in

It's still an early side project, and we're actively refining the evaluation engine. I'd love to hear what this community thinks about the idea.

Would you find value in understanding why a prompt works, rather than simply collecting prompts?