How to set up Claude Code for a real engineering team

Claude Code works out of the box for a single developer. Rolling it out to a team is a different problem — you need conventions, guardrails, and a review pattern that scales. Here’s the playbook we’d use today.

Step 1: Install and authenticate

Claude Code is npm install -g @anthropic-ai/claude-code, then claude to authenticate. Each engineer authenticates with their own Pro/Max account, or the team’s API console for billing consolidation.

Step 2: Write a CLAUDE.md

This is the highest-leverage 30 minutes you’ll spend. Drop a CLAUDE.md in the repo root that covers:

• Project overview — what this codebase is, in 3 sentences.
• Stack — languages, frameworks, key libraries.
• Conventions — how you name things, structure tests, format commits.
• Anti-patterns — what not to do (tabs vs. spaces, libraries you don’t use, refactors you don’t want).
• Common workflows — “to add a new endpoint, follow this pattern.” This is where teams undershoot most.

Claude reads this on every session. Done well, it eliminates 80% of the one-off corrections you’d otherwise type.

Step 3: Set permissions

By default, Claude Code asks permission for write operations. For trusted commands, add an allowlist in ~/.claude/settings.json so engineers aren’t permission-prompt-fatigued. Common entries: Bash(npm test), Bash(git status), Bash(git diff).

Step 4: Wire up hooks (the underrated feature)

Hooks let you run commands on tool events — pre-commit lint checks, post-edit type checking, notifications when work completes. The pattern that pays off most: a Stop hook that runs your test suite when Claude finishes a task.

Step 5: Code review pattern

The biggest mistake teams make is letting Claude-generated PRs go straight to main. Treat them like junior-engineer PRs:

• Small commits, narrative PR descriptions.
• One human reviewer who actually reads the diff.
• Tests required, no “I’ll add them later.”

Step 6: Iterate on CLAUDE.md weekly

Every time someone has to correct Claude on something, ask: “should that have been in CLAUDE.md?” Most of the time the answer is yes. CLAUDE.md is a living document; it should grow weekly for the first month.

What you’ll get if you do this

Engineers who were skeptical will start saying “I can’t go back.” PR cycle time drops 30-50%. The trade-off is that you now own a new artifact (CLAUDE.md) — but it’s the cheapest senior-eng-time multiplier we’ve seen.