C4 Code

This generates C4 code-level documentation by analyzing directories and extracting function signatures, class hierarchies, dependencies, and data flows. You point it at a codebase and it outputs structured docs with method signatures, file locations, and dependency graphs. Works across paradigms: it'll use class diagrams for OOP code, flowcharts for functional pipelines, and module structures for procedural stuff. Honestly most useful when onboarding to unfamiliar code or documenting complex components where you need the internal structure mapped out. The template is comprehensive but might be overkill for simple utilities. Pairs well with the other C4 agents if you're doing full architecture documentation.

skills.sh installs: 242
GitHub stars: 39.4K
last updated: Jun 3, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill c4-code --agent claude-code

Installs into .claude/skills of the current project.

Files

C4 Code Level: [Directory Name]

Use this skill when

Working on c4 code level: [directory name] tasks or workflows
Needing guidance, best practices, or checklists for c4 code level: [directory name]

Do not use this skill when

The task is unrelated to c4 code level: [directory name]
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.

Overview

Name: [Descriptive name for this code directory]
Description: [Short description of what this code does]
Location: [Link to actual directory path]
Language: [Primary programming language(s)]
Purpose: [What this code accomplishes]

Code Elements

Functions/Methods

functionName(param1: Type, param2: Type): ReturnType
- Description: [What this function does]
- Location: [file path:line number]
- Dependencies: [what this function depends on]