Nested CLAUDE.md Files: How We're Standardizing AI Context Across Every Project

If you’re using Claude Code, you’ve probably encountered the CLAUDE.md file — or maybe you’ve been meaning to set one up. Either way, it’s one of the simplest ways to make Claude immediately more useful across your team’s day-to-day development.

We’ve been working to get every project we run fully configured with CLAUDE.md files, including nested ones in major directories. Here’s why that became a priority, and how we approach it.

Starting Point: /init

For any new project, the entry point is simple. Run /init in a new Claude session, let it scan the repo, and it generates a CLAUDE.md at the root. From there, the team refines it — project stack, core features, architecture decisions, conventions we care about — and commits it to the repo.

That last part matters. Once it’s committed, every developer on the team benefits from the same shared context. Every new Claude session starts already understanding the project without anyone re-explaining it. Onboarding gets faster. Context doesn’t live exclusively in one person’s head.

The 200-Line Problem

Claude recommends keeping the root CLAUDE.md to around 200 lines. For simple projects, that’s plenty. For anything non-trivial, it becomes a constraint quickly.

You can either try to keep everything meaningful compressed into that budget, or you can accept that some important context gets left out. Neither option is great.

The move we’ve standardized on: nested CLAUDE.md files.

Scoped, Modular Context

Instead of forcing everything into one root file, we place additional CLAUDE.md files inside major directories. Claude walks up the directory tree from wherever you’re working, loading relevant context along the way — including CLAUDE.local.md when present for machine-specific overrides.

In practice, this means:

• Feature-level context lives with the feature
• Infrastructure context lives with infra
• Shared conventions stay at the root

The result is scoped, modular context that closely mirrors how the codebase itself is organized. Claude picks up what’s relevant to where you’re working, without loading noise from unrelated parts of the project.

What We’re Doing Across Projects

We’re currently working through all of our active projects to make sure nested CLAUDE.md files are in place wherever the codebase warrants it. For each project, that typically means:

1. Auditing what’s in the root CLAUDE.md and what’s been left out due to space
2. Identifying the major directories where scoped context would be valuable
3. Distributing context into nested files, keeping the root focused on truly shared rules
4. Committing everything so the full team gets the benefit immediately

It requires being intentional about where you run Claude from — context loading depends on your working directory — but that’s a small habit to build relative to the output improvement.

Why It’s Worth the Investment

The underlying goal here is making sure the team can move quickly on any part of any project, not just the parts they’re already deeply familiar with.

When Claude has well-structured, accurate context for the area you’re working in, outputs are more precise, suggestions are more relevant, and you spend less time correcting for things it should have already known. For a team working across multiple active projects, that compounds quickly.

Getting the context layer right is infrastructure work. It doesn’t ship a feature directly, but it raises the floor for everything the team produces on top of it. That’s why we’re treating it as a first-class part of how we set up and maintain projects going forward.

If you’re working on a larger codebase and haven’t explored nested CLAUDE.md files yet, the official docs are a good starting point.