claude-howto/CATALOG.md

Claude Code Feature Catalog

Quick reference guide to all Claude Code features: commands, agents, skills, plugins, and hooks.

Navigation: Commands | Sub-Agents | Skills | Plugins | MCP Servers | Hooks

---

Slash Commands

Commands are user-invoked shortcuts that execute specific actions.

Built-in Commands

Command	Description	When to Use
/help	Show help information	Get started, learn commands
/clear	Clear conversation history	Start fresh, reduce context
/model	Switch AI model	Change performance/cost
/config	View/edit configuration	Customize behavior
/status	Show session status	Check current state
/agents	List available agents	See delegation options
/skills	List available skills	See auto-invoke capabilities
/hooks	List configured hooks	Debug automation
/mcp	List MCP servers	Check external integrations
/memory	View loaded memory files	Debug context loading
/plugin	Manage plugins	Install/remove extensions
/plan	Enter planning mode	Complex implementations
/rewind	Rewind to checkpoint	Undo changes, explore alternatives
/checkpoint	Manage checkpoints	Save/restore states
/cost	Show token usage costs	Monitor spending
/context	Show context window usage	Manage conversation length
/export	Export conversation	Save for reference
/login	Authenticate with Anthropic	Access features
/logout	Sign out	Switch accounts
/sandbox	Toggle sandbox mode	Safe command execution
/vim	Toggle vim mode	Vim-style editing
/doctor	Run diagnostics	Troubleshoot issues
/release-notes	Show release notes	Check new features
/permissions	Manage permissions	Control access
/session	Manage sessions	Multi-session workflows
/rename	Rename current session	Organize sessions
/resume	Resume previous session	Continue work
/todo	View/manage todo list	Track tasks
/tasks	View background tasks	Monitor async operations

Custom Commands (Examples)

Command	Description	When to Use	Installation
/optimize	Analyze code for optimization	Performance improvement	cp 01-slash-commands/optimize.md .claude/commands/
/pr	Prepare pull request	Before submitting PRs	cp 01-slash-commands/pr.md .claude/commands/
/generate-api-docs	Generate API documentation	Document APIs	cp 01-slash-commands/generate-api-docs.md .claude/commands/
/commit	Create git commit with context	Commit changes	cp 01-slash-commands/commit.md .claude/commands/
/push-all	Stage, commit, and push	Quick deployment	cp 01-slash-commands/push-all.md .claude/commands/
/doc-refactor	Restructure documentation	Improve docs	cp 01-slash-commands/doc-refactor.md .claude/commands/
/setup-ci-cd	Setup CI/CD pipeline	New projects	cp 01-slash-commands/setup-ci-cd.md .claude/commands/
/unit-test-expand	Expand test coverage	Improve testing	cp 01-slash-commands/unit-test-expand.md .claude/commands/

Reference: 01-slash-commands/ | Official Docs

Quick Install (All Custom Commands):

cp 01-slash-commands/*.md .claude/commands/

---

Sub-Agents

Specialized AI assistants with isolated contexts for specific tasks.

Built-in Sub-Agents

Agent	Description	Tools	Model	When to Use
general-purpose	Multi-step tasks, research	All tools	Sonnet	Complex research, multi-file tasks
Explore	Codebase exploration	Read, Glob, Grep	Haiku	Quick searches, understanding code
Plan	Implementation planning	Read, Glob, Grep, Bash	Sonnet	Architecture design, planning
Bash	Command execution	Bash	Sonnet	Git operations, terminal tasks
code-reviewer	Code quality analysis	Read, Glob, Grep	Sonnet	PR reviews, quality checks
code-architect	Feature architecture design	Read, Glob, Grep, LS	Sonnet	New feature planning
code-explorer	Deep codebase analysis	Read, Glob, Grep, LS	Sonnet	Understanding existing features
clean-code-reviewer	Clean Code principles	Read, Grep, Glob, Bash	Sonnet	Maintainability review

Custom Sub-Agents (Examples)

Agent	Description	When to Use	Installation
code-reviewer	Comprehensive code quality	Code review sessions	cp 04-subagents/code-reviewer.md .claude/agents/
test-engineer	Test strategy & coverage	Test planning	cp 04-subagents/test-engineer.md .claude/agents/
documentation-writer	Technical documentation	API docs, guides	cp 04-subagents/documentation-writer.md .claude/agents/
secure-reviewer	Security-focused review	Security audits	cp 04-subagents/secure-reviewer.md .claude/agents/
implementation-agent	Full feature implementation	Feature development	cp 04-subagents/implementation-agent.md .claude/agents/
debugger	Root cause analysis	Bug investigation	cp 04-subagents/debugger.md .claude/agents/
data-scientist	SQL queries, data analysis	Data tasks	cp 04-subagents/data-scientist.md .claude/agents/

Reference: 04-subagents/ | Official Docs

Quick Install (All Custom Agents):

cp 04-subagents/*.md .claude/agents/

---

Skills

Auto-invoked capabilities with instructions, scripts, and templates.

Example Skills

Skill	Description	When Auto-Invoked	Installation
code-review	Comprehensive code review	"Review this code", "Check quality"	cp -r 03-skills/code-review ~/.claude/skills/
brand-voice	Brand consistency checker	Writing marketing copy	cp -r 03-skills/brand-voice ~/.claude/skills/
doc-generator	API documentation generator	"Generate docs", "Document API"	cp -r 03-skills/doc-generator ~/.claude/skills/

Skill Structure

~/.claude/skills/skill-name/
├── SKILL.md          # Skill definition & instructions
├── scripts/          # Helper scripts
└── templates/        # Output templates

Reference: 03-skills/ | Official Docs

Quick Install (All Skills):

cp -r 03-skills/* ~/.claude/skills/

---

Plugins

Bundled collections of commands, agents, MCP servers, and hooks.

Example Plugins

Plugin	Description	Components	When to Use	Installation
pr-review	PR review workflow	3 commands, 3 agents, GitHub MCP	Code reviews	/plugin install pr-review
devops-automation	Deployment & monitoring	4 commands, 3 agents, K8s MCP	DevOps tasks	/plugin install devops-automation
documentation	Doc generation suite	4 commands, 3 agents, templates	Documentation	/plugin install documentation

Plugin Structure

.claude-plugin/
├── plugin.json       # Manifest file
├── commands/         # Slash commands
├── agents/           # Sub-agents
├── skills/           # Skills
├── mcp/              # MCP configurations
├── hooks/            # Hook scripts
└── scripts/          # Utility scripts

Reference: 07-plugins/ | Official Docs

Plugin Management Commands:

/plugin list              # List installed plugins
/plugin install <name>    # Install plugin
/plugin remove <name>     # Remove plugin
/plugin update <name>     # Update plugin

---

MCP Servers

Model Context Protocol servers for external tool and API access.

Common MCP Servers

Server	Description	When to Use	Installation
GitHub	PR management, issues, code	GitHub workflows	cp 05-mcp/github-mcp.json .claude/mcp.json
Database	SQL queries, data access	Database operations	cp 05-mcp/database-mcp.json .claude/mcp.json
Filesystem	Advanced file operations	Complex file tasks	cp 05-mcp/filesystem-mcp.json .claude/mcp.json
Slack	Team communication	Notifications, updates	Configure in settings
Google Docs	Document access	Doc editing, review	Configure in settings
Asana	Project management	Task tracking	Configure in settings
Stripe	Payment data	Financial analysis	Configure in settings
Memory	Persistent memory	Cross-session recall	Configure in settings
Context7	Library documentation	Up-to-date docs lookup	Built-in

MCP Configuration Example

{
  "mcpServers": {
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"],
      "env": {
        "GITHUB_TOKEN": "${GITHUB_TOKEN}"
      }
    }
  }
}

Reference: 05-mcp/ | MCP Protocol Docs

Quick Install (GitHub MCP):

export GITHUB_TOKEN="your_token" && cp 05-mcp/github-mcp.json .claude/mcp.json

---

Hooks

Event-driven automation that executes shell commands on Claude Code events.

Hook Events

Event	Description	When Triggered	Use Cases
PreToolUse	Before tool execution	Before any tool runs	Validation, logging
PostToolUse	After tool completion	After any tool completes	Formatting, notifications
PermissionRequest	Permission dialog shown	Before sensitive actions	Custom approval flows
UserPromptSubmit	Before prompt processing	User sends message	Input validation
Notification	Notification sent	Claude sends notification	External alerts
Stop	Agent finishes responding	Response complete	Cleanup, reporting
SubagentStop	Subagent finishes	Subagent task complete	Chain actions
PreCompact	Before compact operation	Context compression	State preservation
SessionStart	Session begins/resumes	Session initialization	Setup tasks

Example Hooks

Hook	Description	Event	Installation
validate-bash.py	Command validation	PreToolUse:Bash	cp 06-hooks/validate-bash.py ~/.claude/hooks/
security-scan.py	Security scanning	PostToolUse:Write	cp 06-hooks/security-scan.py ~/.claude/hooks/
format-code.sh	Auto-formatting	PostToolUse:Write	cp 06-hooks/format-code.sh ~/.claude/hooks/
validate-prompt.py	Prompt validation	UserPromptSubmit	cp 06-hooks/validate-prompt.py ~/.claude/hooks/
context-tracker.py	Token usage tracking	Stop	cp 06-hooks/context-tracker.py ~/.claude/hooks/
pre-commit.sh	Pre-commit validation	PreToolUse:Bash	cp 06-hooks/pre-commit.sh ~/.claude/hooks/
log-bash.sh	Command logging	PostToolUse:Bash	cp 06-hooks/log-bash.sh ~/.claude/hooks/

Hook Configuration

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "command": "~/.claude/hooks/validate-bash.py"
      }
    ],
    "PostToolUse": [
      {
        "matcher": "Write",
        "command": "~/.claude/hooks/format-code.sh"
      }
    ]
  }
}

Reference: 06-hooks/ | Official Docs

Quick Install (All Hooks):

mkdir -p ~/.claude/hooks && cp 06-hooks/*.sh ~/.claude/hooks/ && chmod +x ~/.claude/hooks/*.sh

---

Memory Files

Persistent context loaded automatically across sessions.

Memory Types

Type	Location	Scope	When to Use
Project Memory	./CLAUDE.md	All team members	Team standards, project rules
Directory Memory	./src/api/CLAUDE.md	Specific directories	Module-specific rules
Personal Memory	~/.claude/CLAUDE.md	Individual user	Personal preferences

Reference: 02-memory/ | Official Docs

Quick Install:

cp 02-memory/project-CLAUDE.md ./CLAUDE.md
cp 02-memory/personal-CLAUDE.md ~/.claude/CLAUDE.md

---

Quick Reference Matrix

Feature Selection Guide

Need	Recommended Feature	Why
Quick shortcut	Slash Command	Manual, immediate
Persistent context	Memory	Auto-loaded
Complex automation	Skill	Auto-invoked
Specialized task	Sub-Agent	Isolated context
External data	MCP Server	Real-time access
Event automation	Hook	Event-triggered
Complete solution	Plugin	All-in-one bundle

Installation Priority

Priority	Feature	Command
1. Essential	Memory	cp 02-memory/project-CLAUDE.md ./CLAUDE.md
2. Daily Use	Slash Commands	cp 01-slash-commands/*.md .claude/commands/
3. Quality	Sub-Agents	cp 04-subagents/*.md .claude/agents/
4. Automation	Hooks	cp 06-hooks/*.sh ~/.claude/hooks/ && chmod +x ~/.claude/hooks/*.sh
5. External	MCP	cp 05-mcp/github-mcp.json .claude/mcp.json
6. Advanced	Skills	cp -r 03-skills/* ~/.claude/skills/
7. Complete	Plugins	/plugin install pr-review

---

Complete One-Command Installation

Install all examples from this repository:

# Create directories
mkdir -p .claude/{commands,agents,skills} ~/.claude/{hooks,skills}

# Install all features
cp 01-slash-commands/*.md .claude/commands/ && \
cp 02-memory/project-CLAUDE.md ./CLAUDE.md && \
cp -r 03-skills/* ~/.claude/skills/ && \
cp 04-subagents/*.md .claude/agents/ && \
cp 06-hooks/*.sh ~/.claude/hooks/ && \
chmod +x ~/.claude/hooks/*.sh

---

Additional Resources

• Official Claude Code Documentation
• MCP Protocol Specification
• Learning Roadmap
• Main README

---

Last Updated: January 2026