A game-design planning guide for placing a new or changed player feature on the game's overall map before coding. It covers the feature's complete player flow, from start to finish.

Use it to plan features, characters, screens, heads-up displays (HUDs), ceremonies, and other things players see or do in a game.

It helps prevent isolated features whose screens or actions do not fit together. It also keeps the planning effort proportional to the size of the change.

How ownego/token-slayer configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ownego/token-slayer. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ownego/token-slayer/master/.claude/skills/game-design/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/ownego/token-slayer

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ownego/token-slayer/game-design/github.svg)](https://agentmods.dev/skills/ownego/token-slayer/game-design)

Your own site

<a href="https://agentmods.dev/skills/ownego/token-slayer/game-design"><img src="https://agentmods.dev/badge/skills/ownego/token-slayer/game-design/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ownego/token-slayer/game-design"><img src="https://agentmods.dev/badge/skills/ownego/token-slayer/game-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,463 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00051	$0.01463
Opus 5.5	$0.00020	$0.00585
Sonnet 5.5	$0.00010	$0.00293
Haiku 4.5	$0.00005	$0.00146

Measured 10d ago against content hash cb57a2ec90d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

game-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/game-design/SKILL.md · 56 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago Changed cb57a2ec90d3
22d ago First seen · 56 lines · 51 tokens per session scan A e176c363d59e

Subscribe to this mod's changes

game-design is a skill published in the GitHub repository ownego/token-slayer (4 stars, last pushed 11d ago), with no licence file. It adds 51 tokens to every session and 1,463 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-15.

Game development Planning

game-design next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
game-designownego/token-slayer	Skill	4	11d ago	none	A	51	Claude Code
playtest-reportDonchitos/Claude-Code-Game-Studios	Skill	36k	18d ago	MIT	A	20	Claude Code
godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills	Skill	6.9k	9d ago	Apache-2.0	A	95	Claude Code
scenario-unreal-gameplayscenario-labs/skills	Skill	3.2k	yesterday	MIT	A	121	Claude Code
motionOpenDCAI/GameFactory-3A	Skill	1.0k	8d ago	Apache-2.0	A	0	Claude Code, Codex
unity-addressablesBesty0728/Unity-Skills	Skill	1.9k	yesterday	MIT	A	25	Claude Code, Codex
unity-manual-componentBesty0728/Unity-Skills	Skill	1.9k	yesterday	MIT	A	36	Claude Code, Codex

token-slayer: Skill for Claude Code