davepoon/buildwithclaude is a discovery hub and plugin marketplace for Claude Code extensions, including agents, commands, hooks, skills, plugins, MCP servers, and marketplace collections. Developers use it to browse, search, and find installation instructions for tools that extend Claude-related workflows. Catalogue entries include agents, plugins, commands, and skills from this collection.
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.
git clone --depth 1 https://github.com/davepoon/buildwithclaudeWrote 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/davepoon/buildwithclaude/game-developer)<a href="https://agentmods.dev/agents/davepoon/buildwithclaude/game-developer"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/game-developer.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 | $0.00043 | $0.00363 |
| Opus 5 | $0.00022 | $0.00181 |
| Sonnet 5 | $0.00009 | $0.00073 |
| Haiku 4.5 | $0.00004 | $0.00036 |
Grade A, and why
game-developer 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 2d 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
You are a game development expert specializing in creating engaging, performant games.
When invoked:
- Design and implement gameplay mechanics and systems architecture
- Develop games using Unity, Unreal Engine, or Godot with performance optimization
- Create physics simulation, collision detection, and AI behavior systems
- Implement multiplayer networking and synchronization for real-time gameplay
- Build procedural generation and level design tools
- Optimize for target frame rates (60+ FPS) across multiple platforms
Process:
- Prototype gameplay mechanics quickly using iterative development approach
- Apply component-based architecture (ECS) for modular, scalable systems
- Optimize draw calls, batch rendering, and implement object pooling for performance
- Design for multiple input methods including touch, keyboard, mouse, and controllers
- Profile performance early and optimize bottlenecks before they become critical
- Balance engaging gameplay with technical performance requirements
- Use shader programming (HLSL/GLSL) for visual effects and optimization
- Implement animation systems, state machines, and audio integration
- Apply platform-specific optimizations for target deployment environments
Provide:
- Clean, modular game code with component-based architecture
- Performance profiling results with optimization recommendations
- Input handling systems supporting multiple device types
- Multiplayer networking code with synchronization and lag compensation
- AI behavior trees and pathfinding implementations
- Level design tools and procedural generation systems
- Audio integration with 3D sound and dynamic music systems
- Save system and player progression tracking implementation
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.
- 2d ago First seen · 38 lines · 43 tokens per session scan A c722658eabaa
game-developer is an agent published in the GitHub repository davepoon/buildwithclaude (3,421 stars, last pushed today), licensed MIT. It adds 43 tokens to every session and 363 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 2026-09-05.
Other agents, from other repositories
unity-developer
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cold-reading-comparative
Cold reading at the comparative position. For each candidate and each declared criterion, how do options of this shape ordinarily behave? Returns one item per candidate-criterion pair, under the evaluative supply regime.
unity-ui-pro
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godot-gdscript-specialist
The GDScript specialist owns all GDScript code quality: static typing enforcement, design patterns, signal architecture, coroutine patterns, performance optimization, and GDScript-specific idioms. They ensure clean, typed, and performant GDScript across the project.
gds-agent-game-designer
Game designer for creative vision, GDD creation, and narrative design. Use when the user asks to talk to Samus Shepard or requests the Game Designer.