Claude Code: what everyone mixes up
Skill, plugin, hook, subagent. In Claude Code they all look alike and each one does something different. So I made one A4 poster for each.
It starts with a map, then CLAUDE.md, SKILL.md, commands, subagents, MCP, hooks and plugins. I checked the facts against the official Claude Code docs in October 2026.
Download the free PDF
8 A4 pages, 5 MB, no sign-up
What’s in the PDF
- 01 The map: seven things everyone mixes up, and when each one loads.
- 02 CLAUDE.md and 03 SKILL.md: the note Claude reads every time, and the routine you call with one word.
- 04 Commands: the built-in slash commands a beginner actually needs.
- 05 Subagents and 06 MCP: a helper with its own head, and a cable to your apps.
- 07 Hooks and 08 Plugins: a rule you can’t talk your way around, and a box for everything.
FAQ
Who are the posters for?
The first six are for complete beginners, no terminal needed. Hooks and plugins are for when you know your way around.
Are they up to date?
I last checked the facts on October 2, 2026 against the official Claude Code docs. Claude Code changes fast, so details may shift in newer versions.
Can I print them?
Yes, each poster is one A4 page.
Want more like this? Follow me on X as @lukasersil and on LinkedIn as Lukáš Eršil.