What Is the Difference Between Claude Code and Claude Skills? A Clear Comparison

Mar 17, 2026

Problem

A Reddit user installed a “Claude skill” and tried to use it in Claude Code. They explicitly invoked it, asking for a prompt, but Claude Code used “superpowers:writing-plans” instead. Confused, they asked: “Can it be used in VS Code with Claude Code extension?”

This question revealed a fundamental misunderstanding that many developers have. They don’t understand the difference between:

Claude Code (the CLI tool)
Claude Skills (the extension format)
Claude.ai (the web interface)
Superpowers (a plugin)

The result? Wasted time, wrong troubleshooting paths, and frustration when features don’t work as expected.

What Each Thing Actually Is

Let me break down each component clearly.

Claude Code

Claude Code is Anthropic’s official terminal-based AI assistant for coding. It runs in your terminal and has direct access to your file system, git, and command execution.

Key capabilities:

Terminal interface (claude command)
Built-in slash commands (/plan, /tdd, /code-review, /build-fix)
Plugin system with marketplace
Skills support (installed to ~/.claude/skills/)
VS Code extension available
Direct file system and git access

Installation locations for extensions:

~/.claude/skills/          # Skills
~/.claude/commands/        # Custom commands
~/.config/claude-code/     # Alternative config location

Claude Skills

Skills are portable extension packages that teach Claude specialized workflows. They work across ALL Claude platforms—web, CLI, and API.

Key characteristics:

Cross-platform compatibility
Structured format with YAML frontmatter
Progressive loading (only loads what’s needed)
Shareable as .skill files

Skill directory structure:

skill-name/
├── SKILL.md           # Required: YAML frontmatter + instructions
├── scripts/           # Optional: Executable scripts
├── references/        # Optional: Reference documents
└── assets/            # Optional: Images, data files

Claude.ai (Web Interface)

Claude.ai is the web-based chat interface. It has:

Chat with Claude models
Skills via puzzle piece icon
Artifacts for code rendering
No direct file system access
No terminal command execution

Superpowers

Superpowers is a popular third-party plugin for Claude Code that adds enhanced capabilities like brainstorming workflows, TDD, and code review. This is NOT the skill system—it’s a plugin that contains skills.

Why the Reddit User Got Confused

The Reddit user’s confusion came from mixing up these concepts:

They installed a skill meant for Claude.ai in Claude Code - Skills work everywhere, but each platform has its own installation method
Claude Code’s plugin took precedence - When they invoked the skill, Claude Code’s built-in superpowers plugin had a similar command (writing-plans) that fired instead
They didn’t understand the invocation priority - Claude Code checks built-in commands, then plugins, then skills

Here’s what actually happened:

User invokes skill
       ↓
Check built-in slash commands first
       ↓
Check plugins (superpowers found!) → Uses superpowers:writing-plans
       ↓
Skills never get a chance to fire

Comparison Table

Feature	Claude Code	Claude.ai	Claude Skills
Type	CLI tool	Web interface	Extension format
File system access	Yes	No	Depends on platform
Terminal commands	Yes	No	Via scripts (Code only)
Skills support	Yes	Yes	N/A (IS the format)
Plugin support	Yes	No	N/A
VS Code extension	Yes	No	N/A
Cross-platform	No (CLI only)	No (web only)	Yes (works everywhere)
Built-in commands	Yes	No	N/A

Common Mistakes and Solutions

Mistake	Impact	Solution
Installing claude.ai skill in Claude Code expecting auto-work	Skill doesn’t load	Skills must be installed in each platform’s directory
Expecting Claude Code commands in claude.ai	Features unavailable	Use Claude Code CLI for dev workflows
Confusing superpowers with skills	Wrong troubleshooting	Superpowers is a plugin containing skills
Not understanding invocation priority	Unexpected behavior	Built-in commands/plugins override skills

How to Install Skills Correctly

In Claude Code

# Create skills directory
mkdir -p ~/.claude/skills/

# Copy skill to directory
cp -r downloaded-skill ~/.claude/skills/

# Verify installation
head ~/.claude/skills/downloaded-skill/SKILL.md

# Start Claude Code
claude

In Claude.ai

Open claude.ai in browser
Click skill icon (puzzle piece)
Browse marketplace or upload custom skill
Skill activates when relevant

Minimal Skill Example

---
name: code-reviewer
description: Performs code reviews with best practices checklist.
---

# Code Reviewer Skill

## Review Checklist

1. **Readability**: Clear naming, consistent formatting
2. **Security**: No hardcoded secrets, input validation
3. **Performance**: No unnecessary loops, efficient algorithms
4. **Testing**: Adequate coverage, edge cases handled

## Output Format

## Summary
[2-3 sentence overview]

## Issues Found
- [SEVERITY] Description (line X)

## Suggestions
- [IMPROVEMENT] Description

Summary

In this post, I explained the difference between Claude Code and Claude Skills. The key point is: Claude Code is a specific development tool (a CLI), while Skills are a universal extension format that works across all Claude platforms.

When the Reddit user’s skill was overridden by “superpowers:writing-plans,” they didn’t realize that Claude Code’s plugin system has its own invocation priority. Skills work everywhere, but they’re not the only extension mechanism—Claude Code has commands and plugins too.

If you’re working in Claude Code and skills aren’t firing as expected, check whether a built-in command or plugin is taking precedence. If you’re trying to use claude.ai skills in Claude Code, make sure you install them in the correct directory.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!