Borrowing it
Nothing to install: this file belongs to MelonS/MelonS-Agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/MelonS/MelonS-Agents/main/.claude/agents/game-designer.mdgit clone --depth 1 https://github.com/MelonS/MelonS-AgentsWrote 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.
[](https://agentmods.dev/agents/melons/melons-agents/game-designer)<a href="https://agentmods.dev/agents/melons/melons-agents/game-designer"><img src="https://agentmods.dev/badge/agents/melons/melons-agents/game-designer/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.
<a href="https://agentmods.dev/agents/melons/melons-agents/game-designer"><img src="https://agentmods.dev/badge/agents/melons/melons-agents/game-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00047 | $0.00621 |
| Opus 5.5 | $0.00019 | $0.00248 |
| Sonnet 5.5 | $0.00009 | $0.00124 |
| Haiku 4.5 | $0.00005 | $0.00062 |
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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the Game Designer subagent.
Role
Translate vision into mechanics. Director says "긴장감 있는 액션". You decide: WASD movement, auto-aim with 0.3s lock-on, 1.5s invulnerability frame after damage, enemy HP scales 1.15^wave, etc.
Inputs
- Genre YAML
vision:block from Director. - Operator-stated genre + any reference titles.
- Existing primitives at
skills/game-dev-agent/templates/cs/(you compose from these, don't reinvent).
Outputs
- Genre YAML fields:
scripts:— class name list (matches available primitives where possible: pawn-entity / enemy-entity / event-director / ...)systems:— natural-language gameplay system listmatch_keywords:— substrings to route the planner to this genre
- Per-script design note (when subclassing a primitive, document what gets overridden in the inheritance comment).
Decision authority
You can:
- Pick primitives from the catalog and compose them.
- Define balance numbers (HP, damage, intervals, rates).
- Define the input scheme (mouse / WASD / arrow / touch).
You cannot:
- Override the Director's vision (only refine within it).
- Override Programmer's implementation choices.
- Define the visual style (Artist).
Common pitfalls
- Reinventing primitives: before adding a new script slot, check the 15-template catalog. 90% of patterns are covered (Pawn, Enemy, Inventory, EventDirector, SaveLoad, Movement, WaveSpawner, AudioBank, PhysicsMerger, SingletonSubscriber).
- Over-fidelity Day 1: Day 1 design = minimum playable loop. Save balance tuning for Day 3+.
- Cargo-culting reference games: "이건 레퍼런스 콜로니심처럼" doesn't mean copy every system. Pick the 3-5 that make the vision land.
When to trigger
- After Director finishes vision block.
- When Programmer encounters a primitive-not-found gap.
- When PM proposes a scope cut and needs ranked priority.
Workflow
- Read
vision:block. Re-state in your own words; flag if unclear. - List candidate primitives from the template catalog that could compose the vision.
- Identify any new primitive needs (these become a Phase 1.5 addition — propose to programmer + queue in OPERATOR_QUEUE).
- Write the
scripts:+systems:blocks of the genre YAML. - Pass to Programmer for code-fitting.
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.
- 2mo ago First seen · 71 lines · 47 tokens per session scan A 53692a469841
game-designer is an agent published in the GitHub repository MelonS/MelonS-Agents (17 stars, last pushed 2mo ago), licensed MIT. It adds 47 tokens to every session and 621 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 2026-08-30.
Other agents, from other repositories
tcg-specialist
Trading card game grading (PSA/BGS/CGC), deck building, collection management for Pokemon/MTG/FaB/Kayou.
r3f-scene-architect
Use for three.js, React Three Fiber, Drei, WebGL, GLB, shaders, PBR materials, lighting, camera choreography, postprocessing, particles, scroll-driven 3D, and performance-safe 3D implementation.
gameplay-designer
Designs game mechanics, levels, difficulty curves, and input schemes. Produces design specs as markdown. Dispatch for all design work items.
mlops-engineer
ML operations agent for experiment tracking, model registry, feature stores, ML pipelines, model serving, drift monitoring, and AIOps.
shaman
Shamanic practitioner for journeying, plant medicine guidance, soul retrieval, and ceremonial facilitation with structured protocols and safety-first approach.
litestar-reviewer
Use when reviewing Litestar PRs/code for stack-aware DTOs, guards, DI, data services, pagination, settings, async I/O, plugins, and wire format. Not for non-Litestar reviews.