Covers all five SOLID principles with dedicated references (SRP, OCP, LSP, ISP, DIP), concurrency patterns (actors, @MainActor, Sendable), an anti-pattern catalog, and code templates for views, view models, services, protocols, and models.

Requires grepping the codebase for reusable protocols/services before writing new code, and checking shared locations (Core/Extensions/, Core/Utilities/, Core/Protocols/) before duplicating logic used by 2+ features.

SOLID Swift - Apple Best Practices 2026

Agent Workflow (MANDATORY)

Before ANY implementation, use TeamCreate to spawn 3 agents:

1. fuse-ai-pilot:explore-codebase - Analyze existing architecture
2. fuse-ai-pilot:research-expert - Verify Swift/Apple docs via Apple Docs MCP + Context7
3. XcodeBuildMCP - Build validation after code changes. Then run fuse-ai-pilot:sniper.