ClaudSkills / Engineering / architecture

C4 Diagrams

Quality score: 70/100 · Category: Engineering · Sub-category: architecture

Creates and manages C4 architecture diagrams using PlantUML. 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.

What this skill does

C4 Diagrams is a production-ready Claude Code skill (quality score 70/100) 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.

Who uses this skill

The C4 Diagrams skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

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.

Pro

One-click install via the desktop app

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.

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