design-system

Generate a section-by-section game design document for a single system.

14|1|Updated Apr 12, 2026
One-click install
npx skills add https://github.com/Euraika-Labs/Codex-Code-Game-Studios --skill design-system-euraika-labs
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: design-system
Source: https://github.com/Euraika-Labs/Codex-Code-Game-Studios/tree/main/.agents/skills/design-system
Command: npx skills add https://github.com/Euraika-Labs/Codex-Code-Game-Studios --skill design-system-euraika-labs

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Designers and leads often write system GDDs in isolation, causing inconsistent interfaces, duplicated decisions, and missing technical constraints; this Skill gathers repository context, respects cross-system facts, and guides a section-by-section authoring flow so a single system GDD can be authored or retrofitted reliably and incrementally.

Core Features & Use Cases

  • Guided, section-by-section workflow that creates a skeleton, asks focused questions, drafts content, and requires immediate approval before writing.
  • Retrofit mode to fill missing sections without overwriting existing content and to surface placeholder detection.
  • Context reads from systems index, game concept, entity registry, dependency GDDs, and engine references to present a Technical Feasibility Brief and Known Cross-System Facts.
  • Mandatory specialist agent delegation for Player Fantasy, Detailed Design, Formulas, Edge Cases, Art/Audio, and QA validation depending on section and category.
  • Registry conflict checks, incremental file writes to design/gdd/[system-name].md, session-state updates, and Creative Director gating for full reviews.

Quick Start

Ask the agent to design or retrofit a system by requesting: design-system for the movement system

Frequently Asked Questions about design-system

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write a game design document for a single system without losing technical context?

To write a game design document for a single system without losing context, use a guided workflow that reads repository files, respects cross-system facts, and drafts sections incrementally. This approach gathers engine references and dependency GDDs before generating content.

What is the best way to retrofit an existing GDD with missing sections?

The best way to retrofit an existing GDD with missing sections is using a retrofit mode that detects placeholders and fills gaps without overwriting existing content. This preserves your current design decisions while completing the document structure.

Can I use specialist agents like art director and QA lead when authoring systems design documents?

Yes, you can use specialist agents like art director and QA lead when authoring systems design documents. The workflow mandates delegation to specialist agents for Player Fantasy, Formulas, Edge Cases, Art/Audio, and QA validation depending on the section.

Does the GDD authoring process check for entity registry conflicts?

Yes, the GDD authoring process checks for entity registry conflicts. It performs registry conflict checks during the section-by-section writing flow to ensure new system designs do not duplicate or contradict existing repository facts.

What sections are included in a system game design document?

A system game design document includes Overview, Detailed Design, Formulas, Edge Cases, Dependencies, Tuning Knobs, and Acceptance Criteria sections. These sections are drafted incrementally with immediate approval required before writing to the file.

How do I coordinate a creative director review for a system GDD?

To coordinate a creative director review for a system GDD, the workflow uses Creative Director gating for full reviews. This ensures that all specialist agent contributions and incremental file writes are validated before final approval.