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Claude Code Permissions & Security

Explain Claude Code permission modes and allow/deny list configuration.

18|2|Updated Dec 12, 2025
Search Tags:#security#claude code#access control#permissions#configuration#ai safety
One-click install
npx skills add https://github.com/markus41/claude --skill claude-code-permissions-security
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Claude Code Permissions & Security
Source: https://github.com/markus41/claude/tree/main/plugins/claude-code-expert/skills/permissions-security
Command: npx skills add https://github.com/markus41/claude --skill claude-code-permissions-security

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a comprehensive guide to managing and understanding the permission model and security features within Claude Code, ensuring safe and controlled AI interactions.

Core Features & Use Cases

  • Permission Modes: Explains various modes like default, acceptEdits, plan, dontAsk, and bypassPermissions, detailing their security implications.
  • Configuration: Demonstrates how to configure allow and deny lists for tools and Bash commands in settings.json.
  • Security Best Practices: Offers actionable advice on the principle of least privilege, protecting sensitive files, and sandboxing commands.
  • Use Case: A developer needs to understand how to restrict Claude Code's access to only read and execute specific npm commands, preventing accidental or malicious modifications to their codebase.

Quick Start

Review the 'Permission Modes' section to understand the different security levels available for Claude Code.

Frequently Asked Questions about Claude Code Permissions & Security

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What are the permission modes available in Claude Code?▼

Claude Code offers five permission modes: `default`, `acceptEdits`, `plan`, `dontAsk`, and `bypassPermissions`. Each mode dictates a different level of security and autonomy for AI tool execution.

How do I configure allow and deny lists for Bash commands in Claude Code?▼

You configure allow and deny lists for tools and Bash commands within the `settings.json` file. This restricts Claude Code's access to specific commands, preventing accidental or malicious codebase modifications.

How does pattern matching work for Claude Code access control rules?▼

Pattern matching in Claude Code uses precedence rules to evaluate tool categories and command patterns. This ensures specific deny list rules override broader allow list permissions for secure AI interactions.

Does Claude Code support enterprise-level security controls?▼

Yes, Claude Code includes enterprise-level controls alongside its permission model. These features allow organizations to enforce security best practices like the principle of least privilege and command sandboxing.

What is the best way to restrict Claude Code to only read and execute specific npm commands?▼

The best way to restrict Claude Code is by configuring the `settings.json` file with specific allow and deny lists. This limits the AI to only reading and executing approved npm commands, protecting your codebase.

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