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Agent skill

Gameplay Design Verify

by tangziwen in tangziwen/CubeMiniGame

Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents.

MITAuto-check passedGame Development

Install Gameplay Design Verify

skills CLI
$ npx skills add tangziwen/CubeMiniGame --skill gameplay-design-verify -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install tangziwen/CubeMiniGame gameplay-design-verify --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/tangziwen/CubeMiniGame.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/gameplay-design-verify .claude/skills/gameplay-design-verify && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
gameplay-design-verify
GitHub stars
359
Token cost
~620 tokens
SKILL.md length
270 words
Files
2
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents.

  • Works in 5 steps: AGENTS.md → Doc/GameplayIntent/README.md → the relevant design docs under… → …
  • Check whether gameplay implementation matches accepted design intent
  • SKILL.md covers Purpose, Required Reads, Scope Gate and One-way Rule, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Gameplay Design Verify is an agent skill from tangziwen/CubeMiniGame. Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents. Use only when the user asks to verify, audit, review, or check whether gameplay implementation matches accepted design intent. This is one-way verification: if code and intent disagree, report or fix code; never rewrite intent documents to match the current code unless the user separately asks for design sync.

Its SKILL.md is about 620 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Game Development, covering Game design. The repository describes itself as: HomeBrew C++ 3D Game Engine based on OpenGL & Vulkan. The licence is MIT.

When your agent uses it

  • Check whether gameplay implementation matches accepted design intent
  • Tasks that involve Game design

Example prompts

  • “/gameplay-design-verify”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. AGENTS.md
  2. Doc/GameplayIntent/README.md
  3. the relevant design docs under Doc/GameplayIntent/
  4. the requested source files, changed files, or CodePlan step
  5. only the source code needed to verify the design question

What it can do on your machine

Read from SKILL.md and the folder at commit 33b364c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Gameplay Design Verify loads about 620 tokens when it runs. Until then it costs about 105 tokens; SKILL.md has 270 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~105
When it runs · the whole SKILL.md, loaded when a task matches
~620

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from tangziwen/CubeMiniGame at commit 33b364c, republished under its MIT licence (© tangziwen). 270 words, ~620 tokens.

Download SKILL.mdSave it as .claude/skills/gameplay-design-verify/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
gameplay-design-verify
description
Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents. Use only when the user asks to verify, audit, review, or check whether gameplay implementation matches accepted design intent. This is one-way verification: if code and intent disagree, report or fix code; never rewrite intent documents to match the current code unless the user separately asks for design sync.

Gameplay Design Verify

Purpose

Check whether gameplay implementation under CubeEngine/Application/CubeGame matches the accepted design intent in Doc/GameplayIntent/.

This skill is explicit only. It should not run merely because gameplay files changed.

Required Reads

Read:

  1. AGENTS.md
  2. Doc/GameplayIntent/README.md
  3. the relevant design docs under Doc/GameplayIntent/
  4. the requested source files, changed files, or CodePlan step
  5. only the source code needed to verify the design question

Do not scan unrelated gameplay files broadly.

Scope Gate

  • Verify only CubeEngine/Application/CubeGame/ gameplay behavior and concepts.
  • Ignore pure engine, renderer, backend, build, asset, or formatting changes unless they directly affect a gameplay concept described in Doc/GameplayIntent/.
  • If the request is purely engine-side, say this skill does not apply.

One-way Rule

Doc/GameplayIntent/ is the accepted design source for this verification.

  • If code conflicts with the design docs, treat the code as suspect.
  • Do not update intent documents based on current code.
  • If the design itself seems outdated, report that as an open question and recommend using $gameplay-design-sync only after the user confirms the design changed.
  • If the user asks you to fix the mismatch, edit code or implementation-side docs, not intent docs.

Verification Focus

Prioritize mismatches in:

  • gameplay design intent
  • concrete mechanisms under Design
  • game concepts and aliases
  • object relationships
  • design boundaries
  • thin Concept Code Anchors canonical code anchors

Do not report issues for harmless implementation details that preserve the design meaning.

Output

Lead with findings, ordered by severity.

For each finding, include:

  • design expectation
  • code behavior or risk
  • file/line reference when possible
  • recommended code-side correction

If no issues are found, say the code appears consistent with the relevant gameplay intent and mention residual uncertainty.

© tangziwen, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/gameplay-design-verify of tangziwen/CubeMiniGame.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit 33b364c

Compare with similar skills

Gameplay Design Verify next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Gameplay Design Verify compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gameplay Design Verify this skilltangziwen/CubeMiniGame359—~620Automated safety check: PassMIT
Threejs Gameplay Systemsvalkor-ai/loom1.2k1 repos~1.4kAutomated safety check: PassApache-2.0
Godot Gdscript Patterns925236118/AlphaAgent10310 repos~5kAutomated safety check: PassMIT
Game Asset Spec WriterDonchitos/Claude-Code-Game-Studios26k—~5kAutomated safety check: PassMIT
Game Build From Designzenstory-ai/novel-to-game841—~661Automated safety check: PassMIT
Game Experience Density OptimizerDY-2026/GameDesignOS415—~2.1kAutomated safety check: PassMIT

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Categories

Questions about Gameplay Design Verify

What does Gameplay Design Verify do?

Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents. Gameplay Design Verify is an agent skill from tangziwen/CubeMiniGame. Explicitly verify CubeGame gameplay code against Doc/GameplayIntent design documents.

When should I use Gameplay Design Verify?

Gameplay Design Verify fits situations like: check whether gameplay implementation matches accepted design intent; tasks that involve Game design.

How do I install Gameplay Design Verify in Claude Code?

Run `npx skills add tangziwen/CubeMiniGame --skill gameplay-design-verify -a claude-code`. Or copy the skill folder (.agents/skills/gameplay-design-verify in tangziwen/CubeMiniGame) into .claude/skills/gameplay-design-verify in your project. Claude Code loads it when a task matches its description.

How do I install Gameplay Design Verify in Codex?

Run `npx skills add tangziwen/CubeMiniGame --skill gameplay-design-verify -a codex`. Or copy the skill folder (.agents/skills/gameplay-design-verify in tangziwen/CubeMiniGame) into .agents/skills/gameplay-design-verify in your project. Codex loads it when a task matches its description.

Can I use Gameplay Design Verify in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add tangziwen/CubeMiniGame --skill gameplay-design-verify -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gameplay-design-verify, .gemini/skills/gameplay-design-verify, .github/skills/gameplay-design-verify and .opencode/skills/gameplay-design-verify in your project.

What does Gameplay Design Verify need to run?

SKILL.md names no scripts, command-line tools or credentials: Gameplay Design Verify is instructions for the agent only.

Does Gameplay Design Verify access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Gameplay Design Verify safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Gameplay Design Verify use?

Gameplay Design Verify is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Gameplay Design Verify use?

About 620 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Gameplay Design Verify?

Skills that share tags, products or a category with Gameplay Design Verify: Threejs Gameplay Systems (valkor-ai/loom, 1.2k stars), Godot Gdscript Patterns (925236118/AlphaAgent, 103 stars), Game Asset Spec Writer (Donchitos/Claude-Code-Game-Studios, 26k stars) and Game Build From Design (zenstory-ai/novel-to-game, 841 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gameplay Design Verify?

tangziwen (a GitHub user) maintains it in tangziwen/CubeMiniGame, which has 359 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on September 19, 2026.

Source: tangziwen/CubeMiniGame on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.