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 skills add woliveiras/geremmyas --skill game-performance-2dgit clone --depth 1 https://github.com/woliveiras/geremmyasWrote 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/woliveiras/geremmyas/game-performance-2d)<a href="https://agentmods.dev/skills/woliveiras/geremmyas/game-performance-2d"><img src="https://agentmods.dev/badge/skills/woliveiras/geremmyas/game-performance-2d/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/skills/woliveiras/geremmyas/game-performance-2d"><img src="https://agentmods.dev/badge/skills/woliveiras/geremmyas/game-performance-2d.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 | $0.00054 | $0.00455 |
| Opus 5 | $0.00027 | $0.00228 |
| Sonnet 5 | $0.00011 | $0.00091 |
| Haiku 4.5 | $0.00005 | $0.00046 |
Grade A, and why
game-performance-2d 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.
What it actually says
Game Performance 2D
Optimize measured bottlenecks against an explicit platform budget.
Establish the budget and baseline
- Identify target hardware, renderer, resolution, browser or export target, and required frame rate.
- Reproduce the representative scene in a production-like build.
- Capture CPU, GPU, memory, loading, network, and frame-time evidence as applicable.
- Record engine version, build flags, content seed, viewport, and object counts.
- Rank bottlenecks by player impact and measured cost.
Load references
- Read profiling-and-budgets.md for measurement, bottleneck classification, and optimization order.
- For Phaser, also read phaser.md.
- For Godot, also read godot.md.
- Use
$game-build-and-releasewhen production build configuration or asset delivery is the boundary.
Optimize one bottleneck
- State the hypothesis and metric expected to change.
- Apply the smallest architectural or content change that targets it.
- Preserve gameplay, visual, and accessibility contracts.
- Re-run the identical benchmark and compare percentiles, not a single FPS reading.
- Remove instrumentation that should not ship or gate it behind debug settings.
Verify
- Compare before and after on target-like hardware.
- Test worst-case content, not only an empty scene.
- Check memory growth across repeated scene changes.
- Verify both average frame time and spikes.
- Report tradeoffs, quality changes, and untested targets.
Guardrails
- Do not optimize from intuition alone.
- Do not pool cheap objects without proving allocation is material.
- Do not trade deterministic behavior or correctness for small gains silently.
- Do not use editor performance as proof of exported-build performance.
- Do not move work to threads before checking API thread safety and transfer cost.
What ships with it
4 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.
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 First seen · 48 lines · 54 tokens per session scan A fa83c05c0677
game-performance-2d is a skill published in the GitHub repository woliveiras/geremmyas (10 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 455 once invoked, about $0.0003 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 2026-08-31.
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