Claude Code Tips and Best Practices

CLAUDE.md Project Configuration

CLAUDE.md is Claude Code's most powerful customization mechanism. Claude automatically reads this file at the start of each session, treating it as persistent project instructions.

Configuration Layers

File Path	Scope	Recommended Content
~/.claude/CLAUDE.md	All projects (personal)	Personal coding style preferences
project-root/CLAUDE.md	Current project (shared)	Tech stack, architecture, conventions
subdir/CLAUDE.md	Specific module	Module-specific rules

Effective CLAUDE.md Template

# Project Name

## Tech Stack
- Framework: Next.js 16 (App Router)
- Language: TypeScript 5
- Database: MySQL 8 + Prisma ORM

## Coding Standards
- Use ES module syntax (import/export)
- Prefer Server Components
- API responses use { code, msg, data } format

## Common Commands
- npm run build: Build the project
- npm run typecheck: Run type checker
- npm run test: Run tests

## Project Structure
src/app/     - Page routes
src/lib/     - Utilities and business logic
src/types/   - Type definitions

Context Management Strategies

Claude Code has a finite context window. Managing it effectively is key to a smooth experience.

• Use /compact regularly: After long conversations, compress history while preserving key information
• Reference files precisely: Give Claude exact file paths instead of letting it search the entire project
• Segment large tasks: Break complex work into multiple conversations, each focused on a sub-goal
• Use /clear when switching tasks: Start fresh when moving to an unrelated task

Effective Prompting Techniques

# Poor prompt
> Fix this bug

# Good prompt
> The getSession function in src/lib/auth.ts returns null instead of throwing
> an error when the token is expired. Change it to throw an AuthError, and
> update all callers in src/app/api/ to handle this exception.

Key principles:

• Provide file paths: Reduces time Claude spends searching
• Describe expected behavior: Don't just say "fix the bug" — explain what correct behavior looks like
• Scope the changes: Be explicit about which files need modification

Multi-File Editing Strategies

Claude Code excels at cross-file refactoring with proper guidance:

1. Give Claude the big picture first: "Read src/types/index.ts and all files in src/lib/actions/ to understand the current type definitions and API structure"
2. Execute in stages: Modify type definitions first, then implementations, then callers
3. Verify each step: "Run npm run typecheck to confirm the changes are correct"

Git Workflow Integration

# Generate commit message from current diff
> Review my changes and create a commit with an appropriate message

# Create a complete PR
> Create a PR from this branch to main with a summary and test plan

# Code review
> Review the last 3 commits and point out potential issues

Team Collaboration Best Practices

• Share CLAUDE.md: Commit your project-level CLAUDE.md to the repo so all team members get consistent AI assistance
• Standardize hooks: Set up team convention checks in .claude/settings.json (auto-lint, pre-commit validation)
• Share prompt templates: Establish team-wide prompt templates for common scenarios like bug fixes, feature development, and code reviews

IDE Integration

Claude Code works across major development environments:

• VS Code: Use the Claude Code extension directly within the editor
• JetBrains: Supports IntelliJ IDEA, WebStorm, and the full JetBrains suite
• Terminal: Run directly in any terminal, pairs well with Vim, Emacs, or any editor

FAQ

Is the CLAUDE.md file sent to Anthropic's servers?

Yes, CLAUDE.md content is included as part of the conversation sent to the API. If your CLAUDE.md contains sensitive information (like internal architecture details), ensure you're comfortable with Anthropic's data handling policies, or limit it to non-sensitive coding standards.

How do teams avoid CLAUDE.md merge conflicts?

Split CLAUDE.md by module: put universal conventions in the project root, and module-specific rules in subdirectories. This way, team members working on different modules won't conflict. Personal preferences go in ~/.claude/CLAUDE.md, which isn't committed to the repo.

Which IDEs does Claude Code support?

Claude Code officially provides a VS Code extension and JetBrains plugin. Since Claude Code is fundamentally a terminal tool, you can use it in any IDE or editor with terminal support, including Vim, Neovim, Emacs, and Sublime Text.

How can I control Claude Code's resource consumption?

Use the /cost command to check token usage at any time. Compress context with /compact, specify exact file paths, and break large tasks into smaller steps to effectively reduce token consumption.