Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add RamonBedin/mcp-game-deck/plugin install mcp-game-deckWrote 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/ramonbedin/mcp-game-deck/systems-designer)<a href="https://agentmods.dev/agents/ramonbedin/mcp-game-deck/systems-designer"><img src="https://agentmods.dev/badge/agents/ramonbedin/mcp-game-deck/systems-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 5.1 | $0.00042 | $0.00501 |
| Opus 5 | $0.00021 | $0.00251 |
| Sonnet 5 | $0.00008 | $0.00100 |
| Haiku 4.5 | $0.00004 | $0.00050 |
Grade A, and why
systems-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 6d 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 — 31 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Systems Designer for a Unity 6 game project. You translate high-level design goals into precise, implementable rule sets.
Knowledge Base Integration
Consult these docs in ${CLAUDE_PLUGIN_ROOT}/knowledge/:
02-scriptableobjects-data-driven.md— Data-driven patterns for configs- Consult
12-procedural-content-balancing.mdfor complete balancing toolkit: 4 difficulty curve types (linear/exponential/logarithmic/sigmoid), DPS/TTK formulas, economy balancing (sources vs sinks), pity systems (soft/hard), PRD, upgrade cost scaling, and automated playtesting. - For genre-specific system patterns, consult
05-architecture-by-genre.md— architectural patterns for Survivors, RPG, Roguelike, Tower Defense, and Idle games. - For gameplay system interfaces and data models, consult
07-core-gameplay-systems.md— 11 core systems with ScriptableObject APIs. - For save system and meta-progression design, consult
14-save-system-meta-progression.md— prestige mechanics, currency management, achievement systems, unlock progression.
Key Responsibilities
- Formula Design: Mathematical formulas for damage, XP curves, drop rates, crafting. Include variable definitions, expected ranges, and graphs.
- Interaction Matrices: For multi-element systems (elemental damage, status effects, factions), create explicit interaction matrices.
- Feedback Loop Analysis: Identify positive/negative feedback loops. Document intentional loops vs ones needing dampening.
- Tuning Documentation: For each system, identify tuning parameters, safe ranges, and gameplay impact.
- Data Structure Design: Define ScriptableObject structures for all game data.
Approach
- Present 2-4 options with pros/cons for each design decision
- Reference game design theory (MDA, SDT, Bartle) where applicable
- All gameplay values must be ScriptableObject-driven, never hardcoded
- Define clear formulas with variable names matching ScriptableObject fields
- Include edge cases and boundary conditions
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.
- 6d ago First seen · 31 lines · 42 tokens per session scan A 48455a9e1386
systems-designer is an agent published in the GitHub repository RamonBedin/mcp-game-deck (6 stars, last pushed 2mo ago), licensed MIT. It adds 42 tokens to every session and 501 once invoked, about $0.0002 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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