Claude Code 2026: Complete Cheat Sheet [Hooks, MCP, Commands]

In 2026, Claude Code has evolved from a simple CLI into a full-blown autonomous engineering partner. Navigating its vast array of Slash Commands, Model Context Protocol (MCP) integrations, and custom Lifecycle Hooks can be daunting even for senior engineers. This reference guide serves as your definitive cheat sheet for mastering the Claude Code ecosystem.

Live Command Search

Filter through the 2026 command set in real-time. Start typing a keyword to find exactly what you need.

/bug Report an issue or bug in the codebase

/review Trigger a deep architectural review of current changes

/test Generate or run unit/integration tests for the scope

/commit Stage and commit changes with AI-generated messages

/mcp Manage Model Context Protocol connections

Slash Commands Reference

Slash commands are the primary way to interact with Claude Code without leaving the terminal flow. Here are the most critical commands for 2026.

Command	Purpose	Advanced Usage
/init	Initializes a workspace	`--hooks --template=react`
/explain	High-level logic explanation	`--depth=architectural`
/refactor	Code improvement suggestions	`--strategy=dry`
/pr	Automated Pull Request creation	`--target=main --draft`

MCP & Context Management

The Model Context Protocol (MCP) allows Claude to access external data sources. In 2026, standard providers include GitHub, Slack, and Jira.

# Adding a GitHub MCP provider
claude mcp add github --token=$GH_TOKEN

# Listing active MCP servers
claude mcp list

# Querying context across providers
claude mcp status

Lifecycle Hooks & Automation

Hooks allow you to inject logic at specific points in the Claude Code lifecycle. This is essential for CI/CD integration and custom validation.

The Security Priority

When using hooks that transmit context, always ensure your data is scrubbed. Use the Data Masking Tool to prevent PII or secrets from leaking into Claude\'s training or context window.

Example: pre-commit Hook

// .claude/hooks.js
module.exports = {
  preCommit: async (context) => {
    // Ensure all tests pass before Claude suggests a commit
    const { execSync } = require('child_process');
    try {
      execSync('npm test');
    } catch (e) {
      throw new Error('Tests failed, Claude aborted commit.');
    }
  }
};

Keyboard Shortcuts

Speed up your workflow with these native terminal shortcuts for the Claude Code CLI.

Ctrl + Space: Trigger autocomplete for commands and files.
Ctrl + L: Clear the current session context (not terminal history).
Alt + Enter: Force autonomous execution (skips confirmation).
Ctrl + C: Interrupt a long-running Claude thought process.

Configuration & Security

All configurations are stored in ~/.claude/config.json. You can customize the Claude 3.5 Sonnet or Claude 4.0 model behavior here.

# Set a specific model for the project
claude config set model claude-4-pro

# Adjust creativity (lower is better for refactoring)
claude config set temperature 0.2

# Toggle safety filters
claude config set safety_level strict

For more advanced formatting techniques when piping code into Claude, consider using the Code Formatter tool to ensure your snippets are clean and readable for the model.