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 Bbeierle12/Skill-MCP-Claude --skill case-studies-referencegit clone --depth 1 https://github.com/Bbeierle12/Skill-MCP-ClaudeWrote 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/bbeierle12/skill-mcp-claude/case-studies-reference)<a href="https://agentmods.dev/skills/bbeierle12/skill-mcp-claude/case-studies-reference"><img src="https://agentmods.dev/badge/skills/bbeierle12/skill-mcp-claude/case-studies-reference.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 5.1 | $0.00057 | $0.00641 |
| Opus 5 | $0.00028 | $0.00320 |
| Sonnet 5 | $0.00011 | $0.00128 |
| Haiku 4.5 | $0.00006 | $0.00064 |
Grade A, and why
case-studies-reference 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 8d 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 — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Case Studies Reference
Detailed analysis of building systems from successful games, plus decision frameworks for new projects.
Quick Reference
| Game | Building Focus | Physics | Scale | Key Innovation |
|---|---|---|---|---|
| Fortnite | Combat/action | Arcade | Small | Edit system, speed |
| Rust | Survival/raids | Heuristic | Large | Tool Cupboard, decay |
| Valheim | Exploration | Heuristic | Medium | Stability from ground |
| Minecraft | Creativity | None | Infinite | Voxel simplicity |
| No Man's Sky | Base building | Minimal | Medium | Snap points, free place |
| Satisfactory | Factory | Grid-based | Large | Hybrid grid/free |
When to Use This Skill
Use case studies when making design decisions such as which physics model to implement, how to handle multiplayer building, choosing between grid and free placement, and deciding on decay/upkeep systems. The analyses provide concrete examples of trade-offs and their outcomes.
Reference Documents
See references/ for detailed documentation covering game-by-game breakdowns of building mechanics and performance strategies, decision matrices for common architectural choices, anti-patterns identified from games that struggled, and architectural recommendations organized by game genre.
Decision Framework
For quick decisions, use the matrices in game-analyses.md:
Physics Mode Selection: Are you building a survival game where building is about shelter? Use heuristic physics like Rust or Valheim. Is building core to moment-to-moment combat? Use arcade physics like Fortnite. Is engineering challenge the point? Consider realistic physics with caution since Medieval Engineers showed this approach frustrates most players.
Multiplayer Architecture: Competitive and PvP games require server-authoritative building with latency accepted as the cost of security. Cooperative games can use client prediction with server reconciliation for responsive feel. Single-player can use fully client-side for maximum responsiveness.
What ships with it
2 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.
- 8d ago First seen · 46 lines · 57 tokens per session scan A c10b1671a6b4
case-studies-reference is a skill published in the GitHub repository Bbeierle12/Skill-MCP-Claude (8 stars, last pushed today), licensed MIT. It adds 57 tokens to every session and 641 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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