Claude Code Settings That Scale With Your TypeScript Team

Claude Code reads configuration from five scopes with a defined precedence order: Managed (highest), CLI flags, Local Project, Project, and User (lowest). Managed settings are deployed by IT/DevOps and cannot be overridden. CLI flags are temporary per-session. Local project settings (.claude/settings.local.json) are gitignored personal overrides. Project settings (.claude/settings.json) are committed to Git and shared across the team. User settings (~/.claude/settings.json) apply globally across all projects. Each scope also supports a corresponding CLAUDE.md instruction file. A practical TypeScript team setup uses user scope for universal MCP servers, project scope for framework-specific tools like Playwright, and local project scope for credentials tied to personal accounts.