By skyforbes 
You open ChatGPT. You type a prompt from scratch. You get mediocre results. You refine it. Maybe it works this time.
Next week, you do the exact same thing. From scratch. Again.
This is insane.
It’s like reinventing your favorite recipe every time you cook. Sure, you can figure it out. But why not just save the recipe that worked?
A prompt library solves this. And it’s becoming a core skill that hiring managers are actually asking to see.
Before we go deeper, I should tell you something: I send out my best AI PM tactics every week to 195k+ product managers. Stuff like this, but more detailed. Get my newsletter here.
What a Prompt Library Actually Is
It’s simple. You save your best prompts in one organized place.
Not scattered across ChatGPT threads. Not lost in random notes. One system where you can find any prompt in 10 seconds.
Organize by category, use case, and tool.
That way when you need something specific, you filter and grab it instantly.
The Three Categories That Matter
Here’s how I organize mine:
1. Social Media Posting
- Write threads for Twitter/X
- Generate YouTube captions and descriptions
- Repurpose long-form content into social posts
- Create LinkedIn posts from blog articles
2. Life Organization
- Calendar optimization (what meetings to accept/decline)
- Meal planning based on preferences and time
- Email triage (sort, prioritize, draft responses)
- Travel planning (itineraries, bookings, packing)
3. Work as a PM
- PRD writing from notes
- User research synthesis across dozens of interviews
- Building AI prototypes that scale
- Competitive analysis from multiple sources
- Roadmap prioritization frameworks
Then tag each prompt by which AI tool it works best with. Some prompts are better for Claude. Others for ChatGPT. Some work for both.
When you need to write a PRD, you filter for “PM work” + “PRD” + “Claude” and boom. Your best prompt is right there.
Why This Actually Matters
Structured prompts vastly outperform simple prompts.
A basic prompt: “Write a PRD for a new feature”
A structured prompt from your library:
You are an experienced product manager writing a PRD for [product type].
Context:
- Product: [name]
- Users: [description]
- Problem: [specific problem]
- Success metrics: [metrics]Write a PRD that includes:
1. Problem statement with user impact
2. Success criteria (qualitative and quantitative)
3. User stories for primary use cases
4. Technical requirements
5. Open questions and risksUse this format: [your company's PRD template]Reference these previous PRDs for tone and detail: [links]
The difference in output quality is massive.
And you don’t rebuild this every time. You save it once. Use it forever.
The Productivity Multiplier
Here’s what happens when you build a prompt library:
Week 1 without library:
- Write 5 different prompts from scratch
- Get inconsistent results
- Waste time refining
- Total time: 3 hours
Week 1 with library:
- Pull 5 prompts from library
- Customize for specific use
- Get great results immediately
- Total time: 30 minutes
That’s a 6x time savings on a task you do daily.
Over a month, that’s 10+ hours back. Over a year, that’s an entire work week.
And the best part? The library gets better over time. Every prompt you refine makes it stronger. Every new use case you add makes it more valuable.
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Don’t Want to Build One From Scratch?
Steal mine.
I’ve spent 18 months building a prompt library with 85+ prompts across every category that matters for PMs.
Get my complete Notion database + CSV here
You get:
- All 85+ prompts organized by category
- Tags for which AI tool works best
- Examples of good outputs
- Templates you can customize
It’s plug and play. Import it to Notion or your tool of choice and start using it today.
Want to Build Your Own? Here’s Your Roadmap
If you want to create your own library (which I recommend, since you’ll customize it for your specific needs), here are the resources you need:
Prompt Engineering fundamentals — How to write prompts that actually work
Context Engineering — When to add context, how much, and where
How to use Claude Projects — Store context and prompts for repeated use
How to use ChatGPT Skills — Custom instructions that persist
AI Agents guide — When to build agents vs. save prompts
Hiring Managers Are Asking For This
Here’s something most people don’t know yet.
When you interview for AI PM roles, companies are starting to ask: “Can I see your prompt library?”
They want to see:
- How you organize information
- What prompts you’ve built
- How you think about AI workflows
- Whether you’re actually using AI systematically
Having a well-organized prompt library is becoming a job requirement.
Not officially. Not yet. But the best PMs all have one. And hiring managers notice.
Start This Week
You don’t need 85 prompts on day one.
Start with 5. The ones you use most often.
Maybe that’s:
- Writing meeting summaries
- Drafting PRDs
- Synthesizing research
- Creating social posts
- Analyzing competitors
Save those 5 in a Notion page or Google Doc. Tag them. Use them.
Next week, add 5 more.
Within a month, you’ll have 20+ prompts that dramatically improve your productivity.
Within three months, you’ll have a library that’s genuinely valuable.
Or skip the buildup and grab my 85-prompt library here to start with a complete system today.
The Compound Effect
Every prompt you save is a small win.
But small wins compound.
After three months of using a prompt library:
- You’ve saved 40+ hours
- Your outputs are consistently better
- You’ve tested and refined your best prompts
- You have proof of systematic AI usage for interviews
This isn’t just about productivity. It’s about building systems that make you unreplaceable.
The PMs who master AI tools aren’t just faster. They’re operating at a different level. They can do the work of three people because they’ve systematized everything.
Want to work at that level? Get my newsletter where I share the exact systems I use. 195k+ PMs are already learning these approaches.
Your Next Step
Stop reinventing prompts every time you need them.
Build a library. Or steal mine. Either way, systematize this part of your workflow.
The ROI is immediate. The compounding effects are massive.
Get my 85-prompt library here and start working 6x faster today.
And join my newsletter for systems like this. I don’t just share tactics. I share the complete frameworks that actually work.
The PMs who build these systems now will be unreachable in 12 months.
Don’t get left behind.
What’s in your prompt library? Drop a comment with your most-used prompts. I’m always looking for new additions to test.