- Vol. 1
- Free
- 10 tests a day
SkillBill. Your skills run up a bill. We came to settle it.
Paste a skill. AIR checks it for security risks, builds a cheaper version and runs both on the same tasks. You keep the new one only if it does the same job for fewer tokens.
Your original is never touched

- Kill the bill
- Work Execution Command 49% off
- Fewer tokens. Same job.
- Product Vision 44% off
- Cut paper, not corners
- Approachability Audit 32% off
- Kill the bill
- Code Review Expert 30% off
- Fewer tokens. Same job.
- Amazon RDS for SQL Server 23% off
- Cut paper, not corners
- Marquee Skill 23% off

How it works
- Chapter 1

Hand it over
Paste the SKILL.md, drop its folder, or give a GitHub link.
- Chapter 2

AIR reads every line
A security review shows what the skill can reach, with the line it comes from.
- Chapter 3

Both versions run
AIR builds a cheaper version and runs both on the same tasks, graded blind.
- Chapter 4

Keep the cheaper one
If it does the same job for fewer tokens, take it home. If not, keep the original.
Recently cut
Real skills, measured. 9 of the 35 we measured came out cheaper with the same results. Each version ran every task 3 times, graded without knowing which was which.
See every cut skillWhat AIR checks
Security risks
What the skill can reach, what it sends out and anything that needs a closer look, each with its file and line.
Same results, fewer tokens
The cheaper version counts only if it passes the same checks on every task and uses fewer tokens.
A closed workspace
Tests run in an isolated workspace with no network and no access to your accounts.
Your original, untouched
Nothing is changed in place. The cheaper version is a separate download.
Every check ends with a plain answer
Cut
Same results with fewer tokens. Download the cheaper version.
Nothing to cut
Nothing we tried did the same job with fewer tokens, so you keep the original.
Can't be tested here
It needs something a closed test can't give it, such as a network or a person.
Every answer comes with AIR's security review.
Bring one skill.
See what it can reach and how much of its bill we can cut. Free, and your original is never changed.
Cut my skill's bill