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Get Started Free →Create lightweight, living game design documents for AI-built games. Use when writing a game design brief, system spec, feature contract, content schema, implementation handoff, decision log, or when a coding agent needs durable project memory.
.claude/skills/hashgraph-online-game-design-docs/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-09 | ✗→✓ | ▲ Improved | -3% | 0% |
| case-16 | ✗→✓ | ▲ Improved | -24% | 0% |
| case-01 | ✗→✓ | ▲ Improved | -34% | 0% |
| case-02 | ✗→✓ | ▲ Improved | -54% | 0% |
| case-04 | ✗→✓ | ▲ Improved | -43% | 0% |
Use this skill to create documents that help an AI game-building agent make consistent decisions across sessions. The document should be short enough to stay current and specific enough to constrain implementation.
Primary source: The Art of Game Design: A Book of Lenses, Third Edition by Jesse Schell, especially chapter 27 on design documents and team communication. The workflow is transformed and paraphrased.
Supporting source: the rest of the game skill pack, which turns design lenses into implementable briefs.
Doc Type: brief, system spec, feature contract, tuning sheet, content schema, playtest report, or decision log.Canonical Sections: concise headings suited to the doc type.Open Questions: unresolved decisions with owner or next evidence.Implementation Contract: what the agent should build, avoid, test, and instrument.Maintenance Rule: when this doc must be updated.Before producing a design document, read:
references/core/guide.mdworkflows/living-design-doc.mdOther measured skills in the registry, with their headline benchmark lift.