NestJS Docs

NestJS 12 breaks many NestJS 11 assumptions, so ground each answer in the live docs at https://docs.nestjs.com/, not memory, and link the exact page behind every claim.

Route raw Express usage without Nest abstractions to expressjs-docs, and raw Fastify usage to fastify-docs. Angular frontend questions and third-party packages belong to their own docs unless the NestJS docs cover them.

Workflow

1. Locate the question in references/topic-map.md, a selective index of docs entry points. Done when each part of the question maps to a section of the map, or you have noted that none fits.
2. Search docs.nestjs.com with the user's exact terms plus NestJS vocabulary such as CanActivate, ValidationPipe, NestFactory, SwaggerModule, or Transport, starting from the map's pages and the Routing rules below. Done when you hold the one page that most directly answers each part.
3. Read each page down to the relevant section. Done when you have read the passage behind every claim you will make. When a page has moved, been renamed, or stops short, say so and link the nearest authoritative pages.
4. Answer with the direct answer first, each docs link beside the claim it supports, and TypeScript examples only when the user asks or the page needs them. Mark any conclusion that joins several pages as Inference:. Done when every claim cites a specific page, not the docs home.

Routing