What is Agent-first design?

Agent-first design is a fundamental shift in how products are engineered to leverage AI agents as first-class participants in creation, iteration, and scaling. Unlike traditional human-first design optimized for team productivity, agent-first design builds products with modular architecture, templatable experiences, scalable personalization, and automated validation that enable AI agents to rapidly generate, extend, and personalize functionality at unprecedented scale.

Is Claude better than ChatGPT for developers?

Anthropic's offerings are more appealing to developers because Anthropic offers Claude Code which provides superior agentic workflows natively on your computer. While ChatGPT operates through a web interface requiring constant copy-paste workflows, Claude Code executes commands and modifies files within your existing development environment.

Can you use Claude Code with multiple codebases simultaneously?

Yes, open a separate terminal window for each codebase. Each Claude Code instance runs independently with its own context and session.

Does Claude Code work on Windows?

Yes, Claude Code works smoothly on Windows via WSL2 (Windows Subsystem for Linux). Install WSL2, then install Claude Code within the Linux environment. You can edit files in Visual Studio Code while Claude Code runs in the WSL terminal.

Can you use Claude Code on a VPS/remote server?

Yes, Claude Code can be installed and run on VPS with proper security setup. This allows you to work on projects with more computational resources or maintain persistent sessions. Ensure proper firewall configuration and secure access methods.

How do you stop Claude Code from asking for permissions every time?

Use Shift+Tab to enable auto-accept mode, or configure allowedTools in ~/.claude.json for granular control. Avoid --dangerously-skip-permissions as it removes all safety checks.

How do I enable auto-accept mode in Claude Code?

Press Shift+Tab repeatedly to cycle through modes until you see 'auto-accept edit on' in the UI. This eliminates permission prompts for file edits and operations.

What's the difference between auto-accept mode and plan mode?

Auto-accept mode eliminates permission prompts for immediate execution, while plan mode restricts Claude to read-only research until you approve a plan. They represent opposite ends of the safety spectrum.

Can I customize which tools are auto-accepted in Claude Code?

Yes, configure allowedTools in your ~/.claude.json file to specify exactly which operations proceed without prompts. This provides granular control over permissions.

What is --dangerously-skip-permissions in Claude Code?

A CLI flag that bypasses all safety checks and permission prompts. However, configuring allowedTools provides better security with similar workflow benefits.

Is --dangerously-skip-permissions safe to use?

No, it removes all safety guardrails and can lead to system damage. Use explicit allowedTools configuration instead for secure automation.

What's the difference between auto-accept and dangerous skip permissions?

Auto-accept uses UI toggle (Shift+Tab) with configurable restrictions, while dangerous skip is a CLI flag that bypasses ALL safety checks. Auto-accept is the safer approach.

How should you structure your CLAUDE.md file?

Use clear markdown sections with specific examples and step-by-step procedures. Tell Claude exactly which files to read or avoid. Claude follows CLAUDE.md instructions more strictly than prompts.

How do I configure an MCP server with Claude Code?

Configure MCP servers in ~/.claude.json or ~/.claude/mcp_servers.json to connect external tools. See Configuration for setup details.

How do you add multiple working directories in Claude Code?

Use the --add-dir CLI argument to access multiple directories beyond your current working directory. For example: claude --add-dir /path/to/other/project or claude --add-dir ../backend-api to work across multiple repositories simultaneously. This enables cross-project collaboration while maintaining context.

How do you activate Plan Mode in Claude Code?

Press Shift+Tab repeatedly to cycle through modes until Plan Mode is activated. Plan Mode allows Claude to research and plan without making changes until you approve.

What does Auto-Compact mean in Claude Code?

When context window approaches limit, Claude Code automatically summarizes the conversation to free up space and continue working. You can also manually compact using /compact command.

What is the Task tool in Claude Code and when should you use it?

The Task tool launches parallel sub-agents. Each Task creates a sub-agent, indicated within the Claude Code UI by a flashing bubble that turns green when complete.

What is Todo List in Claude Code?

Claude Code includes a built-in todo list system that tracks progress and shows what Claude plans to do next during your coding session. Todo items have three states: pending, in_progress, and completed.

How do you enable terminal bell notifications in Claude Code?

Enable terminal bell notifications with 'claude config set --global preferredNotifChannel terminal_bell' to get audio alerts when Claude completes tasks. Test with 'echo -e "\a"' to verify your terminal supports bell sounds. No restart required after configuration.

Can I use Claude Code with the Pro subscription?

Yes, Claude Code works with Claude Pro, but you're limited to the Claude 4 Sonnet model and have lower usage limits compared to Claude Max.

What's the difference between Claude Max 5X and regular Pro for Claude Code?

Claude Max 5X provides 5x higher usage limits and access to Claude 4 Opus in Claude Code. Pro plan can only use Sonnet and Haiku in Claude Code. With Max using Sonnet you rarely hit limits; with Opus you hit limits after ~2 hours.

Should you use many small files or few large files with Claude Code?

Use many small files organized by logical boundaries. This reduces context window usage since Claude only loads relevant files, improves code comprehension, and prevents token waste from loading massive files for small changes.

Where can I find additional tools, extensions, and community projects for Claude Code?

Check out Awesome Claude Code (https://github.com/hesreallyhim/awesome-claude-code) for a curated collection of community tools, extensions, tips, and additional resources.

What is CLAUDE.md and why is it important?

CLAUDE.md is a project-specific configuration file that gives Claude Code detailed instructions about your project. It's crucial because Claude follows CLAUDE.md instructions more strictly than regular prompts, making it essential for consistent behavior and optimal results.

How do I install Claude Code?

Install Claude Code using npm: 'npm install -g @anthropic-ai/claude-code'. You'll need Node.js 18.0+ and either an Anthropic API key or Claude Max subscription. Configure with 'claude config' after installation.

Which Claude model should I use with Claude Code?

Use Claude 4 Opus for most development work (superior reasoning), Claude 4 Sonnet for routine tasks. Strategic switching optimizes both quality and cost performance.

What are the system requirements for Claude Code?

Claude Code requires Node.js 18.0+, 4GB RAM minimum (16GB recommended), 500MB disk space, and internet connectivity. Supports macOS 10.15+, Windows 10+, and Linux (Ubuntu 18.04+, CentOS 7+).

How do I troubleshoot Claude Code installation issues?

Common solutions: 1) Verify Node.js 18.0+ is installed, 2) Check API key setup with 'claude config', 3) Ensure internet connectivity, 4) Try reinstalling with 'npm install -g @anthropic-ai/claude-code --force', 5) For permission issues on macOS/Linux, use sudo or fix npm permissions.

How do I check my Claude Code usage to avoid unexpected API costs?

API users can check usage in the Anthropic Console (https://console.anthropic.com). Subscription users should use the CC Usage tool (https://github.com/ryoppippi/ccusage): install with 'npm install -g ccusage', then run 'ccusage' for detailed token and cost breakdowns.

Is Claude Code slower on WSL compared to native Linux?

Yes, Claude Code typically runs more efficiently on native Linux due to direct system access and reduced overhead. WSL2 introduces virtualization layers that can impact performance, especially for file operations and process spawning.

Can Claude Code analyze images and screenshots from my computer?

Yes, Claude Code can analyze images from your computer. Reference image file paths in your conversation or paste images directly into the terminal. Useful for debugging UI issues, analyzing screenshots, and visual documentation.

How do auto-compact, /compact, and /clear work in Claude Code?

Auto-compact summarizes conversations when approaching limits. '/compact [instructions]' manually summarizes with specific preservation. '/clear' starts fresh conversation.

Can I use Visual Studio Code with Claude Code on Windows WSL?

Yes, edit files in VS Code while Claude Code runs in WSL terminal. Run 'claude' in VS Code's integrated terminal to auto-install the extension. Use '/ide' command to connect.

How do I switch between different Claude models in Claude Code?

Use the command line flag '--model' when starting Claude Code. For example: 'claude --model claude-sonnet-4-20250514' for Sonnet 4 or 'claude --model claude-opus-4-20250514' for Opus 4. You can also use '/model' command within an active session to switch models.

How do I set up terminal bell notifications on Windows WSL?

For Windows WSL users, if the standard terminal bell doesn't work, Claude Code can run these PowerShell commands for audio notifications: Default beep: 'powershell.exe -c "[System.Media.SystemSounds]::Beep.Play()"' or Question sound: 'powershell.exe -c "[System.Media.SystemSounds]::Question.Play()"'. Enable notifications with: 'claude config set --global preferredNotifChannel terminal_bell'.

How do sub-agents work in Claude Code and when should I use them?

Sub-agents are parallel task executors that run independently with their own context window. They're useful for tasks requiring multiple file operations or research phases. For example, if Claude needs to write several different files on different topics, each sub-agent can research and write independently. Sub-agents perform tasks significantly faster than the interactive Claude instance.

Do sub-agents consume the main agent's context window?

Sub-agents have their own separate context windows and are provided with the task and light context. Only the results they return consume space in the main agent's context window, not their internal processing. This makes them efficient for complex multi-step tasks.

Can I use both API keys and subscription plans with Claude Code?

Yes, Claude Code supports both Anthropic API keys and Claude subscription plans (Pro and Max). Configure your preferred authentication method with 'claude config'. Subscription users get different usage limits and model access compared to API users.

Why is Claude Code showing 503 error? Is my Claude Code broken?

No, a 503 error indicates server issues, not problems with your Claude Code installation. This means Anthropic's servers are temporarily busy or under maintenance. The error usually resolves in 2-5 minutes automatically. Check https://status.anthropic.com/ for official server status or r/ClaudeAI for community reports.

Is Claude Code down for everyone right now? How do I check if Claude Code is just me?

To check if Claude Code is down for everyone: visit https://status.anthropic.com/ for official status and r/ClaudeAI for user reports. Test other websites to verify your internet connection. Widespread outages show multiple Reddit reports within minutes, while individual issues usually resolve in 1-2 minutes.

Why am I getting Claude Code API errors? Is there a Claude Code API outage?

Claude Code API errors are usually temporary connectivity issues, not API outages. Common causes include connection timeouts, server overload (503 errors), or rate limiting. Check https://status.anthropic.com/ for API status and restart Claude Code. True API outages affecting all users are rare and announced on the status page.

What does Claude Code internal server error mean? How do I fix it?

Claude Code internal server errors are temporary backend processing issues on Anthropic's servers, not problems with your setup. These usually resolve automatically within 1-3 minutes. Check https://status.anthropic.com/ for backend issues and avoid reinstalling Claude Code as it won't help with server-side errors.

Claude Code is Anthropic's official CLI for AI-assisted coding. It's a terminal-based development tool with file management, code analysis, multi-model support, and MCP server integration that works directly in your development environment.

How do I get started with Claude Code?

Install via npm, navigate to your project, run 'claude', then ask 'explain what this repo is about' to get immediate project-specific guidance. The key is understanding the conversation-based workflow that makes it different from traditional coding tools.

What can Claude Code do?

Claude Code handles code analysis, feature development, refactoring, debugging, testing, documentation, and works with virtually any programming language and framework. It can read files directly, make coordinated changes across multiple files, and maintain context throughout your session.

Claude Code is free to install but requires a Claude subscription ($20-200/month) or Anthropic API credits for usage. Claude Pro costs $20/month, Claude Max costs $200/month with higher limits and Opus access, while API pricing is pay-per-use.

How do I write better prompts for Claude Code?

Be specific about what you want, provide context about your project and constraints, set clear scope, and leverage CLAUDE.md for persistent context. Instructions in CLAUDE.md are followed more strictly than prompts, so document your project structure and coding standards there.

How do I use Claude Code for debugging?

Claude Code excels at error analysis, stack trace interpretation, and logic tracing. Provide full error messages and context for best results. It can trace bugs across multiple files, recognize patterns, and identify edge cases that cause failures.

How do I use Claude Code for code review?

Claude Code provides comprehensive code reviews covering quality, security, performance, and best practices. It can analyze entire files or specific functions, check for patterns, and provide detailed improvement suggestions with context awareness.

What programming languages work best with Claude Code?

JavaScript/TypeScript, Python, and Java have excellent support. Claude Code works with virtually any language but excels with popular frameworks and well-structured projects. Python shows the strongest community satisfaction based on user feedback.

What is Claude 4.1 Opus

Claude 4.1 Opus is Anthropic's latest maximum capability AI model, released August 5, 2025. It delivers enhanced coding performance with 74.5% on SWE-bench Verified and notable improvements in multi-file refactoring and debugging across large codebases.

Using Claude 4.1 Opus in Claude Code

# Configure Claude 4.1 Opus as default
export ANTHROPIC_MODEL="claude-opus-4-1-20250805"

# Use for specific session
claude --model claude-opus-4-1-20250805

Custom Agents with Claude 4.1 Opus

You can tactically construct custom agents that utilize Claude 4.1 Opus for maximum capability tasks. These specialized agents automatically delegate complex work to the enhanced model when triggered.

---
name: architecture-reviewer
model: claude-opus-4-1-20250805
description: Use this agent for comprehensive architectural analysis, large-scale refactoring planning, and complex system design reviews requiring maximum reasoning capability. 

Examples: <example>Context: User needs architectural guidance for complex system changes. user: "I need to refactor our microservices architecture to improve performance" assistant: "I'll use the architecture-reviewer agent to analyze your current system and create a comprehensive refactoring plan." <commentary>Complex architectural refactoring requires enhanced multi-file analysis and reasoning capabilities to maintain system consistency across services.</commentary></example> 

<example>Context: Large codebase requires systematic analysis. user: "Help me understand the dependencies across our 50+ service codebase" assistant: "Let me engage the architecture-reviewer agent to map out your service dependencies using enhanced multi-file analysis." <commentary>Large-scale dependency mapping benefits from improved SWE-bench performance and precise debugging capabilities across complex codebases.</commentary></example>
tools: Read, Grep, Glob, MultiEdit
---

You are an expert architectural reviewer specializing in complex system analysis and large-scale refactoring planning. When activated, you must:

1. **Analyze the complete system architecture** - Map dependencies, identify bottlenecks, and understand component relationships across the entire codebase
2. **Create comprehensive refactoring plans** - Provide step-by-step strategies that maintain system stability while implementing improvements
3. **Assess impact and risks** - Evaluate potential breaking changes and provide mitigation strategies for complex architectural modifications
4. **Prioritize changes strategically** - Recommend implementation order based on risk, impact, and business value considerations

Always provide detailed analysis with specific file references and concrete implementation steps. Use the enhanced reasoning capabilities to ensure architectural consistency across all system components.

For complete agent construction patterns and best practices, see Agent Engineering.

Official Documentation

For complete details on capabilities, pricing, and technical specifications:

Release announcement: Claude Opus 4.1
Model specifications: About Claude Models
Pricing details: Anthropic Pricing

Maximum Capability Deployment

Claude 4.1 Opus is the most capable AI coding model, ideal when enhanced reasoning justifies the higher computational cost.

Using Claude 4.1 Opus in Claude Code
Custom Agents with Claude 4.1 Opus
Official Documentation

Using Claude 4.1 Opus in Claude Code​

Custom Agents with Claude 4.1 Opus​

Official Documentation​

Maximum Capability Deployment

Using Claude 4.1 Opus in Claude Code

Custom Agents with Claude 4.1 Opus

Official Documentation