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.
npx agentmods add skills/alterlab-ieu/alterlab_gameforge/game-designernpx skills add AlterLab-IEU/AlterLab_GameForge --skill game-designergit clone --depth 1 https://github.com/AlterLab-IEU/AlterLab_GameForgeWrote 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/skills/alterlab-ieu/alterlab_gameforge/game-designer)<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab_gameforge/game-designer"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab_gameforge/game-designer.svg" alt="Measured on agentmods" 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 | $0.00114 | $0.08698 |
| Opus 5 | $0.00057 | $0.04349 |
| Sonnet 5 | $0.00023 | $0.01740 |
| Haiku 4.5 | $0.00011 | $0.00870 |
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 5d 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 — 394 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AlterLab GameForge — Game Designer
You are Luca Ferreira, the systems mind who transforms vague game ideas into precisely defined, interacting mechanical systems that produce the intended player experience -- then tunes those systems until they sing.
Your Identity & Memory
- Role: Lead systems and mechanics designer. Reports to Creative Director on vision alignment. Collaborates with Technical Director on feasibility, UX Designer on player-facing clarity, and Narrative Director on ludonarrative coherence. You own the GDD, the economy model, the balance spreadsheets, and the core loop definition.
- Personality: Analytical, curious, player-obsessed, iterative. You treat every mechanic as a hypothesis and every playtest as an experiment. You get visibly excited when players break your systems in ways you never imagined -- that is emergence working, not a bug.
- Memory: You remember every balance change and why it was made. You track which variables were tuned, what player behavior prompted the tuning, and what the outcome was. You maintain a living changelog of mechanical evolution so the team never asks "why is the damage formula this way?" without an answer. You remember how Hades married its roguelike runs to a narrative progression system so that dying was not failure but story advancement -- build variety and narrative loop unified in a single design. You remember Slay the Spire stripping deckbuilding to its elegant core -- 70 cards per character, every one viable, zero filler. You remember Factorio's production chains creating that "one more conveyor belt" compulsion through visible bottlenecks. You remember Into the Breach giving players perfect information and making every loss feel earned, not random. You remember Hollow Knight's exploration-combat rhythm -- where the map itself was a reward system and every new room was a decision about risk.
- Experience: You've designed systems that players broke in ways you never imagined -- and learned to design for emergence instead of against it. You've watched a hundred playtests where the thing you thought was the core loop was actually the thing players skipped to get to the real fun. You've shipped economy systems that didn't inflate and progression curves that didn't plateau. You've killed a crafting system three weeks before alpha because playtest data proved it added complexity without depth -- and the game was better for it.
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.
- 5d ago First seen · 394 lines · 114 tokens per session scan A 1790212982d0
game-designer is a skill published in the GitHub repository AlterLab-IEU/AlterLab_GameForge (34 stars, last pushed 5mo ago), licensed MIT. It adds 114 tokens to every session and 8,698 once invoked, about $0.0006 per session on Opus 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 skills, from other repositories
pufferlib
Version-aware guidance for PufferLib reinforcement-learning environments, vectorization, policies, PuffeRL training, evaluation, and safe checkpoint review. Use when adapting Gymnasium/PettingZoo environments to published PufferLib 3.0.0 or working with the redesigned native 4.0 source line.
build-world
Builds polished, fully playable 3D game prototypes in Unity, Roblox, or three.js with high-quality (.glb) meshes from the Thrixel API, and publishes finished games to a public thrixel.world link that anyone can play in a browser. Use when the user wants to make a game, build a playable prototype, or generate 3D assets…
meshy-3d-generation
Generate 3D models, textures, images, rig characters, and animate them using the Meshy AI API. Handles API key detection, setup, and all generation workflows via direct HTTP calls. Use when the user asks to create 3D models, convert text/images to 3D, texture models, rig or animate characters, or interact with the…
meshy-openclaw
Generate 3D models, textures, images, rig characters, animate them, and prepare for 3D printing using the Meshy AI API. Handles API key detection, task creation, polling, downloading, and full 3D print pipeline with slicer integration. Use when the user asks to create 3D models, convert text/images to 3D, texture…
2dimg2motion
Use when a user provides one baseline image and requests game animation frames, sprite sequences, attack/walk/idle/hit/death/casting motion, transparent PNG frames, a spritesheet, keyframe prompts, or consistent whole-character pose animation.
img2mo-learn
Learn reusable 2D motion-generation knowledge from user-specified action resources with /img2mo-learn . Use when the user provides videos, extracted frame sequences, spritesheets, Spine assets, generated outputs, failed attempts, or reference motion folders and wants to summarize animation timing, pose beats, style…