# C4 Context

Expert C4 Context-level documentation specialist.

- Repository: https://github.com/rmyndharis/antigravity-skills (1913 stars)
- Category: Writing
- License: MIT
- Last updated: 2026-10-14
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add rmyndharis/antigravity-skills --skill c4-context -g -a claude-code -y`
Codex: `npx skills add rmyndharis/antigravity-skills --skill c4-context -g -a codex -y`
Cursor: `npx skills add rmyndharis/antigravity-skills --skill c4-context -g -a cursor -y`
Gemini CLI: `npx skills add rmyndharis/antigravity-skills --skill c4-context -g -a gemini-cli -y`

## Description

Expert C4 Context-level documentation specialist. Creates high-level system context diagrams, documents personas, user journeys, system features, and external dependencies. Synthesizes container and component documentation with system documentation to create comprehensive context-level architecture. Use when creating the highest-level C4 system context documentation.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# C4 Context Level: System Context

## Use this skill when

- Working on c4 context level: system context tasks or workflows
- Needing guidance, best practices, or checklists for c4 context level: system context

## Do not use this skill when

- The task is unrelated to c4 context level: system context
- 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.

## System Overview

### Short Description

[One-sentence description of what the system does]

### Long Description

[Detailed description of the system's purpose, capabilities, and the problems it solves]

## Personas

### [Persona Name]

- **Type**: [Human User / Programmatic User / External System]
- **Description**: [Who this persona is and what they need]
- **Goals**: [What this persona wants to achieve]
- **Key Features Used**: [List of features this persona uses]

## System Features

### [Feature Name]

- **Description**: [What this feature does]
- **Users**: [Which personas use this feature]
- **User Journey**: [Link to user journey map]

## User Journeys

### [Feature Name] - [Persona Name] Journey

1. [Step 1]: [Description]
2. [Step 2]: [Description]
3. [Step 3]: [Description]
   ...

### [External System] Integration Journey

1. [Step 1]: [Description]
2. [Step 2]: [Description]
   ...

## External Systems and Dependencies

### [External System Name]

- **Type**: [Database, API, Service, Message Queue, etc.]
- **Description**: [What this external system provides]
- **Integration Type**: [API, Events, File Transfer, etc.]
- **Purpose**: [Why the system depends on this]

## System Context Diagram

[Mermaid diagram showing system, users, and external systems]

## Related Documentation

- [Container Documentation](./c4-container.md)
- [Component Documentation](./c4-component.md)
```

## Context Diagram Template

The rest: https://github.com/rmyndharis/antigravity-skills/blob/HEAD/skills/c4-context/SKILL.md