Customise Claude Code with CLAUDE.md for Enhanced Context (2026 Guide)

As teams head into 2026, the fastest way to align Claude Code with your engineering “house rules” is a lightweight CLAUDE.md. Claude automatically loads this file at the start of a session, so your architecture, standards and workflows are followed without constant re-explaining—across terminal, IDEs and the web.

Why this matters in 2026

Engineering velocity now hinges on how quickly your assistant can understand your repo and act safely. CLAUDE.md turns tribal knowledge into a living, versioned contract: coding standards, test/build commands, security guardrails and review etiquette. Pair it with your knowledge layer in Glean, work orchestration in Asana, system maps in Miro and source-of-truth docs in Notion for a complete “find → understand → act” loop.

What’s new / how it works

Claude treats CLAUDE.md as first-class context. Place it in your repo root (recommended). In monorepos, add service-level files, and optionally a global file at ~/.claude/CLAUDE.md. Kickstart a draft with /init, then refine it so it’s short, specific and enforceable. Keep it evolving—any instruction you repeat twice should live here.

Practical steps (that actually help)

1. Create and place it wisely. Start at the repo root; add child files for services or packages that diverge from global rules.

2. Capture facts, not fluff. Architecture, key directories, commands (build, test, lint, deploy), security norms (secrets handling), and code review expectations.

3. Define the workflow. Spell out how work moves: plan → implement → test → PR. If your intake lives in Asana, link the board and naming conventions.

4. Wire your knowledge. Point Claude to system diagrams in Miro, runbooks in Notion and codebase search via Glean so responses cite the right sources.

5. Iterate continuously. When processes change, update the file in the same PR—CLAUDE.md should age at the pace of your code.

A starter CLAUDE.md you can adapt

# Project Context
Follow our “plan → implement → test → commit” workflow. Ask clarifying questions before architectural changes. Prefer small, reviewable PRs.

## Architecture
Next.js + NestJS monorepo. Shared UI in `packages/ui`. See Miro system map: <link to Miro> and Notion runbooks: <link to Notion>

# Project Context
Follow our “plan → implement → test → commit” workflow. Ask clarifying questions before architectural changes. Prefer small, reviewable PRs.

## Architecture
Next.js + NestJS monorepo. Shared UI in `packages/ui`. See Miro system map: <link to Miro> and Notion runbooks: <link to Notion>

# Project Context
Follow our “plan → implement → test → commit” workflow. Ask clarifying questions before architectural changes. Prefer small, reviewable PRs.

## Architecture
Next.js + NestJS monorepo. Shared UI in `packages/ui`. See Miro system map: <link to Miro> and Notion runbooks: <link to Notion>

(Keep it concise—Claude reads it every session.)

CLAUDE.md is a special file that Claude Code loads automatically to understand your project. Place it in your repo (or ~/.claude/) with architecture, standards, commands and workflows. Generate a starter with /init, then refine it so Claude consistently follows your team’s rules across terminal, IDE and web.

Summary

CLAUDE.md is your 2026 shortcut to consistent, compliant engineering: a single, living file that makes Claude Code behave like a well-briefed teammate. If you’d like a template tailored to your stack—and integrated with Glean, Asana, Miro and Notion—Generation Digital can help design and roll it out across teams.

FAQs

What is a CLAUDE.md file?
A configuration-style Markdown file that gives Claude persistent, project-specific context—structure, standards, commands and workflow rules.

Where should I put it?
Start with the repo root. In monorepos, add service-level files. Optionally keep a global file at ~/.claude/CLAUDE.md for personal or organisation-wide defaults.

How do I get started quickly?
Open Claude Code and run /init to auto-generate a draft. Trim generic text, add your real standards and link to Notion runbooks, Miro diagrams and Asana boards.

How does this work with enterprise knowledge?
Point CLAUDE.md at Glean so Claude can retrieve the right pages and code intelligently, then cite or summarise them in context.