Settings files and memory

Learn where Claude Code keeps settings: user settings (~/.claude/settings.json), project settings shared with the team (.claude/settings.json) and personal project settings (.claude/settings.local.json). Memory: CLAUDE.md at project and user level, imported files, and updating memory when Claude repeats a mistake. Know the key commands: /init, /memory, /model, /permissions, /config, /compact, /clear, /resume, /rewind.