Before writing any new code it requires a DRY check -- grep the codebase and Core/Services/Core/Contracts for existing logic to reuse before creating something new. See principles.md for the 5 SOLID principles and patterns.md for directory layout, testing, and record usage.
Agent Workflow (MANDATORY)
Before ANY implementation, spawn 3 agents in parallel, one Agent call each with a name:
- fuse-ai-pilot:explore-codebase - Analyze existing architecture
- fuse-ai-pilot:research-expert - Verify .NET docs via Context7
- fuse-ai-pilot:sniper - Post-implementation validation
DRY - Reuse Before Creating (MANDATORY)
Before writing ANY new code:
- Grep the codebase for similar interfaces, services, or logic
- Check shared locations:
Core/Services/,Core/Contracts/ - If similar code exists -> extend/reuse instead of duplicate
- If code will be used by 2+ features -> create it in
Core/
Architecture (Modules MANDATORY)
| Layer | Location |
|---|---|
| Controllers | Modules/[Feature]/Controllers/ |
| Services | Modules/[Feature]/Services/ |
| Repositories | Modules/[Feature]/Repositories/ |
| Contracts | Modules/[Feature]/Contracts/ |
| Models | Modules/[Feature]/Models/ |
| Shared | Core/{Services,Contracts,Models}/ |
NEVER use flat structure - always Modules/[Feature]/
Critical Rules (MANDATORY)
| Rule | Value |
|---|---|
| File limit | FUSE_SOLID_MAX_LINES |
| Controllers | Thin, delegate to services |
| Interfaces | Contracts/ directory ONLY |
| XML docs | Every public member documented |
| DI | Use Microsoft.Extensions.DependencyInjection |
| Small interfaces | 1-3 members max |
| Records | Prefer record for DTOs and value objects |
Reference Guide
| Topic | Reference | When to consult |
|---|---|---|
| SOLID Principles | principles.md | Quick reference for all 5 principles |
| Patterns & Structure | patterns.md | Directory layout, testing, records |
Forbidden
| Anti-Pattern | Fix |
|---|---|
Files over FUSE_SOLID_MAX_LINES |
Split by responsibility |
| Interfaces in impl files | Move to Contracts/ directory |
| Fat interfaces (4+ members) | Split into focused interfaces |
| Flat project structure | Use Modules/[Feature]/ |
new for dependencies |
Use constructor injection + DI |
| Service Locator pattern | Use constructor injection |