C4 Diagrams includes pricing or quota commentary; 19 code blocks for direct copy-paste. At roughly 2,212 words the SKILL.md is on the longer end of the catalog distribution.
C4 Diagrams sits in the Engineering category under the architecture sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.
These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.
This skill helps you create and manage C4 architecture diagrams using the PlantUML format. C4 diagrams provide a hierarchical way to visualize software architecture at different levels of detail, from high-level system context down to low-level components.
C4 Diagrams is a community-contributed Claude Code skill in the architecture sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/c4-diagrams/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when the user wants to visualize software architecture, create context/container/component/sequence diagrams, document system design with the C4 model, or mentions architecture diagrams, system design, or PlantUML. Supports iterative diagram building through conversational workflow.
The C4 Diagrams Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/c4-diagrams curl -L https://claudskills.com/skills/c4-diagrams/SKILL.md \ -o ~/.claude/skills/c4-diagrams/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/c4-diagrams/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/c4-diagrams/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\c4-diagrams\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
SKILL.md from the source repository to ~/.claude/skills/c4-diagrams/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. C4 Diagrams is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{c4-diagrams-2026,
author = {ClaudSkills},
title = {C4 Diagrams [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/c4-diagrams/}
}Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.