attac-t Skill: Craft Shared Domain
"Shared should be small. Large Shared means restructuring needed."
The Standard
- Cross-Cutting Only: Audit, logging, base classes—truly shared concerns.
- Keep Minimal: If Shared grows large, domains need restructuring.
- No Business Logic: Shared is infrastructure, not domain rules.
- Alternative: Support: Use
src/Support/for utilities instead.
The Anti-Patterns
| ❌ Don't | ✅ Do | Why |
|---|---|---|
| Dump "common" code | Place in owning domain | Someone owns it |
| Business logic in Shared | Keep in specific domain | Business != shared |
| Large Shared namespace | Split into domains | Shared is a smell |
Real-World Examples
See examples.md.