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 bcastelino/agent-skills-kit --skill pc-gamesgit clone --depth 1 https://github.com/bcastelino/agent-skills-kitWrote 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/bcastelino/agent-skills-kit/pc-games)<a href="https://agentmods.dev/skills/bcastelino/agent-skills-kit/pc-games"><img src="https://agentmods.dev/badge/skills/bcastelino/agent-skills-kit/pc-games/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/bcastelino/agent-skills-kit/pc-games"><img src="https://agentmods.dev/badge/skills/bcastelino/agent-skills-kit/pc-games.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 | $0.00019 | $0.00730 |
| Opus 5 | $0.00010 | $0.00365 |
| Sonnet 5 | $0.00004 | $0.00146 |
| Haiku 4.5 | $0.00002 | $0.00073 |
Grade A, and why
pc-games 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.
This is a copy
92% identical to pc-games — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PC/Console Game Development
Engine selection and platform-specific principles.
1. Engine Selection
Decision Tree
What are you building?
│
├── 2D Game
│ ├── Open source important? → Godot
│ └── Large team/assets? → Unity
│
├── 3D Game
│ ├── AAA visual quality? → Unreal
│ ├── Cross-platform priority? → Unity
│ └── Indie/open source? → Godot 4
│
└── Specific Needs
├── DOTS performance? → Unity
├── Nanite/Lumen? → Unreal
└── Lightweight? → Godot
Comparison
| Factor | Unity 6 | Godot 4 | Unreal 5 |
|---|---|---|---|
| 2D | Good | Excellent | Limited |
| 3D | Good | Good | Excellent |
| Learning | Medium | Easy | Hard |
| Cost | Revenue share | Free | 5% after $1M |
| Team | Any | Solo-Medium | Medium-Large |
2. Platform Features
Steam Integration
| Feature | Purpose |
|---|---|
| Achievements | Player goals |
| Cloud Saves | Cross-device progress |
| Leaderboards | Competition |
| Workshop | User mods |
| Rich Presence | Show in-game status |
Console Requirements
| Platform | Certification |
|---|---|
| PlayStation | TRC compliance |
| Xbox | XR compliance |
| Nintendo | Lotcheck |
3. Controller Support
Input Abstraction
Map ACTIONS, not buttons:
- "confirm" → A (Xbox), Cross (PS), B (Nintendo)
- "cancel" → B (Xbox), Circle (PS), A (Nintendo)
Haptic Feedback
| Intensity | Use |
|---|---|
| Light | UI feedback |
| Medium | Impacts |
| Heavy | Major events |
4. Performance Optimization
Profiling First
| Engine | Tool |
|---|---|
| Unity | Profiler Window |
| Godot | Debugger → Profiler |
| Unreal | Unreal Insights |
Common Bottlenecks
| Bottleneck | Solution |
|---|---|
| Draw calls | Batching, atlases |
| GC spikes | Object pooling |
| Physics | Simpler colliders |
| Shaders | LOD shaders |
5. Engine-Specific Principles
Unity 6
- DOTS for performance-critical systems
- Burst compiler for hot paths
- Addressables for asset streaming
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 · 144 lines · 19 tokens per session scan A 01fbebefb784
pc-games is a skill published in the GitHub repository bcastelino/agent-skills-kit (2 stars, last pushed 1mo ago), licensed MIT. It adds 19 tokens to every session and 730 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to pc-games, differing in 3 lines, and is treated as a copy.
Other skills, from other repositories
cloudflare-durable-objects
Cloudflare Durable Objects for stateful coordination and real-time apps. Use for chat, multiplayer games, WebSocket hibernation, or encountering class export, migration, alarm errors.
researcher
Delegate a deep research or survey task to Google's Antigravity CLI (agy staffer, fast Gemini). Use when the user says /agy:researcher, "ask agy to research", "have the agy staffer survey X", or wants a second, independent deep-dive on a topic or codebase without spending the host model's quota.
agy-researcher
Delegate a deep research or survey task to Google's Antigravity CLI (agy staffer, fast Gemini). Use when the user says /skill:agy-researcher, "ask agy to research", "have the agy staffer survey X", or wants a second, independent deep-dive on a topic or codebase without spending the host model's quota.
agy-staffer
Delegate a general-purpose task to Google's Antigravity CLI (agy staffer, fast Gemini) with a minimal, unopinionated prompt. Use when the user says /skill:agy-staffer, "have agy do/handle X", "have agy generate an image", or the task fits none of the specialist personas (researcher / reviewer / implementer / ask) …
reviewer
Get a second-opinion review from Google's Antigravity CLI (agy staffer, fast Gemini) - of code (a diff, PR, working tree) or of a decision, plan, or design. Use when the user says /agy:reviewer, "have agy review this", "second opinion on my diff/PR/plan", or after finishing work and wanting an independent verifier…
design
Write a game design document from a one-liner, rough draft, or feature discussion. Outputs a structured design doc ready for /qq:plan. Use when starting a new feature, fleshing out a game idea, or documenting a design before implementation.