There are skill marketplaces that charge $12-20 per month for access to a library of generic prompts. That might make sense if you use a lot of different skills regularly.
We do something different. $25, one time, for one specific skill. And we guarantee the result.
Here's exactly what you get.
What you submit
Any AI skill file you already have:
- A CLAUDE.md you wrote for your project
- A .cursorrules file from your Cursor setup
- A system prompt you use with ChatGPT
- A .windsurfrules file
- A skill you bought from another marketplace
- Something you found on GitHub
It doesn't matter where it came from. We optimize whatever you give us.
What happens to it
Your skill goes through our optimization pipeline:
Evolutionary mutation. We generate hundreds of variants of your skill, each with targeted changes — restructured sections, refined instructions, added or removed constraints.
Blind evaluation. Each variant is scored by 3 independent judges who don't know which version is the original vs. optimized. Binary pass/fail criteria — not subjective 1-10 ratings. Randomized A/B ordering prevents position bias.
Selection. The variants that genuinely perform better under blind testing survive. The ones that just look better but don't actually improve? They get caught and discarded.
This is where we're fundamentally different from "improved prompt" services. We don't hand you a rewrite and say "trust us, it's better." We prove it with data.
What you receive
1. Optimized skill file
Your improved skill in its original format — .md, .cursorrules, whatever you submitted.
2. Report card PDF
A detailed breakdown showing:
- Before score vs. after score (percentage pass rate)
- Win/loss/tie record across all blind comparisons
- Which specific criteria improved and by how much
- File size comparison (optimized skills are often smaller — our brainstorming optimization cut size from 10.5KB to 3.1KB while improving pass rate from 60% to 90%)
3. Multi-platform export
Your optimized skill packaged for every major AI platform:
- Claude Code (.claude.md)
- Cursor (.cursorrules)
- ChatGPT (system-prompt.txt)
- Windsurf (.windsurfrules)
- Gemini (GEMINI.md)
Submit one skill, get it optimized for all five platforms.
4. SHA-256 verification
Every skill file we produce has a SHA-256 hash published on our site. You can verify that the file you downloaded is exactly what we produced — no tampering, no modifications. Hash it locally in your browser at presientlabs.com/verify. No file data is ever uploaded.
5. The original for comparison
Your original skill file is included so you can diff them side by side and see exactly what changed.
The guarantee
If your optimized skill doesn't beat the original by at least 10 percentage points under blind testing, OR if the win rate is below 60%, you get an automatic refund. No questions asked.
We learned why this guarantee matters the hard way. Our writing-plans skill scored 96% on internal metrics but collapsed to 46% under blind testing. If we'd shipped that without blind evaluation, we would have shipped a downgrade and called it an upgrade. The guarantee forces us to prove every result.
Why one-time beats subscription
Skill marketplaces charge monthly for access to a library. That makes sense for their model — you're renting access to a catalog.
We're not selling you a skill. We're making YOUR skill better. Once it's optimized, it's yours. You don't pay us again. The improvement is permanent.
$25 covers the compute for the full optimization pipeline, the evaluation by 3 independent judges, the multi-platform packaging, and the report card. If the result doesn't meet our guarantee threshold, you pay nothing.
For teams, a 5-pack is $99 ($19.80 each). If you want continuous re-optimization as your codebase evolves, the Research Lab subscription is $9/mo.
Who this is for
This is for people who want high-performance AI, not just AI access.
If you're a developer who's already using AI daily and you want your tools to perform measurably better — not "I think it's better" but "the blind evaluation says it's better" — that's what we built.
You already have the car. We're the performance shop. Bring us what you've got, we tune it, we prove the improvement, or you don't pay.