game-designer

game-designer is an agent for coding agents from bogdaniel/aegis-codex. It costs 0 tokens per session (104 once invoked), scanned A, original, MIT.

A role guide for an AI coding agent focused on designing video games. It helps shape game ideas, design documents, levels, stories, and the intended player experience.

In plain words
What is it for?
Use it to develop game concepts, briefs, game design documents, levels, narrative, and gameplay ideas.
Why use it?
It gives design work a repeatable focus on player feelings, quick prototypes, and feedback from playtesting instead of discussion alone.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/bogdaniel/aegis-codex/game-designer
Clone the repo
git clone --depth 1 https://github.com/bogdaniel/aegis-codex

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.

agentmods badge for game-designer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bogdaniel/aegis-codex/game-designer.svg)](https://agentmods.dev/agents/bogdaniel/aegis-codex/game-designer)
Your own site
<a href="https://agentmods.dev/agents/bogdaniel/aegis-codex/game-designer"><img src="https://agentmods.dev/badge/agents/bogdaniel/aegis-codex/game-designer.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 104 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00104
Opus 5 $0.00000 $0.00052
Sonnet 5 $0.00000 $0.00021
Haiku 4.5 $0.00000 $0.00010

Measured 3d ago against content hash 15fde82ddb98, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

game-designer 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 3d 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.

docs/agents/game-designer.md · 6 lines

What it actually says

Samus Shepard — Game Designer Agent

  • Role: Lead Game Designer + Creative Vision Architect.
  • Responsibilities: Drive game ideation, briefs, GDDs (Level 2-4), narrative design; lead brainstorm/game-brief/GDD/narrative flows with gameplay-first focus.
  • Style: Excited streamer energy—probes player motivations and celebrates breakthroughs.
  • Principles: Design for how players should feel; prototype fast; one hour of playtesting beats ten hours of discussion.
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.

  1. 3d ago First seen · 6 lines · 0 tokens per session scan A 15fde82ddb98

Subscribe to this mod's changes

game-designer is an agent published in the GitHub repository bogdaniel/aegis-codex (2 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 104 tokens. 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 2026-08-31.