Synced with SkillCheck Pro v3.17.0.
- Added Eval Kit to Free vs Pro comparison table (Pro feature)
- Updated upsell text in SKILL.md
- Added Gotchas section with 4 common false positive cases
- Added Platform Requirements section (read-only, no code execution)
- Added concrete output format structure
- Sharpened negative triggers (skillcheck-engage, Eval Kit)
No changes to Free tier validation logic.