Before writing any new code it requires a DRY check across modules/cores/lib, modules/cores/interfaces, and modules/cores/errors, extracting anything repeated 3+ times into a shared helper. Each of the 5 SOLID principles has its own detailed reference (single-responsibility.md through dependency-inversion.md), plus copy-paste-ready templates for modules, services, interfaces, validators, factories, errors, and tests.

SOLID Generic - TypeScript / Bun / Node.js

Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one Agent call each with a name:

1. fuse-ai-pilot:explore-codebase - Analyze project structure and existing patterns
2. fuse-ai-pilot:research-expert - Verify latest TypeScript/Bun docs via Context7
3. mcp__context7__query-docs - Check integration compatibility

After implementation, run fuse-ai-pilot:sniper for validation.