NestJS Architecture and Principles

Make architecture decisions from the repository's actual constraints. Prefer the least complex design that protects the required boundaries and can evolve safely.

Pre-execution conflict guard

Before editing files or running any state-changing command, reconcile active instructions. Read-only inspection may continue.

Prerequisites

Inspect repository instructions, installed versions, module wiring, contracts, callers, tests, and affected commands. Preserve user changes. Read other active skills only when their decisions overlap.

Primary ownership

This skill owns architecture level, capability/module APIs, dependency direction, data/write and transaction boundaries, ports, and service extraction. When installed and relevant, coordinate with: