# How Claude Code works in large codebases: Best practices and where to start | Claude

<https://claude.com/blog/how-claude-code-works-in-large-codebases-best-practices-and-where-to-start>

- Host: [claude.com](https://links.thingelstad.xyz/hosts/claude.com/)
- Saved: May 20, 2026 (2026-05-20T12:30:43Z)
- Record: https://links.thingelstad.xyz/links/b74623b58b77/
- JSON: https://links.thingelstad.xyz/links/b74623b58b77.json

## What Jamie wrote

I'm using Claude in a monorepo (my first monorepo actually) and the multiple CLAUDE.md thing is an obvious but important thing to do.

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Appears in

- [WT349: WT349 — Owning the Rails](https://weekly.thingelstad.com/archive/349/), Briefly

## Same host

- [Introducing Cowork | Claude](https://links.thingelstad.xyz/links/6bc268f5339c/) (claude.com, January 14, 2026)
- [Claude for Open Source | Claude by Anthropic](https://links.thingelstad.xyz/links/daf5eb024d66/) (claude.com, March 3, 2026)
- [How Anthropic employees use Claude Tag | Claude by Anthropic](https://links.thingelstad.xyz/links/e16b0183615a/) (claude.com, September 3, 2026)
- [Claude Cowork and chat are now one Claude | Claude by Anthropic](https://links.thingelstad.xyz/links/dc7fec7fdf80/) (claude.com, September 17, 2026)
- [What a task costs on Opus 5.5 | Claude by Anthropic](https://links.thingelstad.xyz/links/e13b2e2a5e97/) (claude.com, September 24, 2026)

## Saved the same week

- [what 262,715 regex questions on stack overflow haven't answered | ian erik varatalu](https://links.thingelstad.xyz/links/11bfbe2dd776/) (iev.ee, May 20, 2026)
- [A Field Guide to Learning - Bite of an Apple](https://links.thingelstad.xyz/links/3bce2da644f3/) (brianschrader.com, May 20, 2026)
- [feedr: A feature-rich terminal-based RSS/Atom feed reader written in Rust.](https://links.thingelstad.xyz/links/ad843f04e48c/) (github.com, May 20, 2026)
- [Project Glasswing: what Mythos showed us](https://links.thingelstad.xyz/links/9cce0b5a8441/) (blog.cloudflare.com, May 20, 2026)
- [LLMs are functions, not brains.](https://links.thingelstad.xyz/links/044e16db1b61/) (james-pritchard.com, May 20, 2026)

## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://claude.com/blog/how-claude-code-works-in-large-codebases-best-practices-and-where-to-start