02-game-programmer

A game-programming specialist for C# in Unity, C++ in Unreal Engine, and GDScript in Godot.

In plain words
What is it for?
Use it to build gameplay systems, organize engine code, debug issues, optimize performance, and design code that can grow with the game.
Why use it?
It helps turn game ideas into maintainable systems while finding bugs and addressing performance problems.

Agent

Install

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.

agentmods
npx agentmods add agents/pluginagentmarketplace/custom-plugin-game-developer/02-game-programmer
Clone the repo
git clone --depth 1 https://github.com/pluginagentmarketplace/custom-plugin-game-developer
Per session 71 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,945 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00071 $0.03945
Opus 5 $0.00036 $0.01972
Sonnet 5 $0.00014 $0.00789
Haiku 4.5 $0.00007 $0.00394

Measured 2d ago against content hash 369c8bcf75ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

02-game-programmer 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.

agents/02-game-programmer.md · 480 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. 2d ago First seen · 480 lines · 71 tokens per session scan A 369c8bcf75ad

Subscribe to this mod's changes

02-game-programmer is an agent published in the GitHub repository pluginagentmarketplace/custom-plugin-game-developer (33 stars, last pushed 7mo ago), with no licence file. It adds 71 tokens to every session and 3,945 once invoked, about $0.0004 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 2026-08-30.

Related

Other agents, from other repositories

strategy-reviewer

Agent that provides a second opinion on scenario analysis. As a different fund manager, performs a critical review of an existing analysis and points out blind spots, misinterpretations, and alternative scenarios. Provides constructive feedback in English to improve the quality of the analysis. Invoked by the…

tradermonty/claude-trading-skills · 64 tokens

technical-director

The Technical Director owns all high-level technical decisions including engine architecture, technology choices, performance strategy, and technical risk management. Use this agent for architecture-level decisions, technology evaluations, cross-system technical conflicts, and when a technical choice will constrain or…

Donchitos/Claude-Code-Game-Studios · 56 tokens

ai-programmer

The AI Programmer implements game AI systems: behavior trees, state machines, pathfinding, perception systems, decision-making, and NPC behavior. Use this agent for AI system implementation, pathfinding optimization, enemy behavior programming, or AI debugging.

Donchitos/Claude-Code-Game-Studios · 51 tokens

godot-game-dev

Use this agent when the user needs help implementing Godot Engine features, including GDScript or C# coding, scene/node setup, player controllers, enemy AI, inventory systems, dialogue, save/load, HUD, cameras, multiplayer, or any Godot-specific implementation. Examples: Context: User needs to implement enemy AI.…

jame581/GodotPrompter · 357 tokens

test-deduplicator

Duplicate test removal agent. Use in Step 4 (Refactoring) of the development workflow. Receives the list of test files added or modified in the current iteration, reads those files and any existing files in the same test class, identifies and removes true duplicates, merges parameterizable tests, then commits. Returns…

nowsprinting/unity-coding-skills · 83 tokens

test-designer

Test design specialist agent. Used in two workflows: (1) during plan mode, AFTER the Plan agent has produced class/method designs and BEFORE the plan file is finalized; (2) in the fix-bug workflow (outside plan mode), to design the reproduction test and regression tests from a bug report. Takes requirements (feature…

nowsprinting/unity-coding-skills · 161 tokens