Getting started with Claude Code configuration

Where agents, skills, commands, CLAUDE.md and MCP live — fast.

Check it's installed first

Verified on this Mac (2026-07-29):

$ claude --version
2.1.199 (Claude Code)

What .claude/ actually looks like

A project with a couple of skills installed looks like this:

.claude/
├─ agents/
│  └─ reviewer.md
├─ skills/
│  └─ keihi-seisan/
│     └─ SKILL.md
├─ commands/
├─ settings.json
└─ (project root) CLAUDE.md

The first-run "trust this workspace" prompt

New project folders ask you to trust the workspace once — needed for `permissions.allow` auto-approval rules to take effect.

What to install first

Start with one reviewer subagent, confirm it behaves, then add CLAUDE.md rules, then skills/hooks/MCP incrementally — avoids the "why isn't this working" confusion of installing everything at once.

FAQ

How do I check Claude Code is installed?
Run `claude --version`. On this Mac it showed `2.1.199 (Claude Code)` on 2026-07-29.
Why am I asked to trust the workspace on first run?
It's needed once, to enable permissions.allow auto-approval rules.
What should I install first?
One reviewer subagent first, then CLAUDE.md, then skills/hooks/MCP incrementally.
What does .claude/ actually contain?
agents/, skills/, commands/, settings.json, plus CLAUDE.md at the project root.