4D Development Expert (v21)

Skill Version

• 4D Version: v21
• Skill Version: 1.0
• Docs: Full official 4D v21 documentation embedded in docs/ (3,387 files)

This skill targets 4D v21 specifically. Do not assume features from other versions exist unless verified in the embedded documentation.

How to Use This Skill

CRITICAL: For any 4D task, ALWAYS prefer reading the embedded documentation files (docs/) over relying on training data. The docs/ folder contains the authoritative 4D v21 reference.