Game Dev Agent

game-dev-agent

AI agent that orchestrates Unity game development tasks via CLI. Companion to [game-prototype](../game-prototype/) (the actual game built using this agent).

What it does

Modules (each = subagent):

• asset_gen — Generate sprites / tiles / UI icons via ComfyUI + SDXL,

auto-save to Unity Assets folder with proper import settings

• code_assist — Unity-aware C# scaffolding: MonoBehaviour / ScriptableObject /

Editor scripts. Knows Unity 2022.3 API.

• balance_tune — Read ScriptableObject configs + JSON balance files,

propose parameter tuning. Game-dev specific (beyond what general AI code assistants do).

• audio_gen — BGM via Suno (operator-provided files), SFX via local

AudioCraft / freesound API. Auto-conform to Unity AudioClip import.

• runtime_director (in-game AI) — LLM-driven event generation for

the game itself, demonstrating dev-time + runtime AI agent patterns.

Why this skill matters

Career positioning: combines deep game-dev domain (operator's existing strength) with AI agent engineering (rare, emerging hire-niche). Portfolio = (this agent) + (game built with it) = T-shape proof.

Operator-specific:

• Operator has 10+ year game dev background
• AI agent engineer roles emerging in game industry + general tech
• Game industry downturn — pure game-dev roles competitive
• AI agent angle = downturn-resilient niche

Usage (planned, Day 1)

# Generate a sprite
python skills/game-dev-agent/scripts/agent.py gen-sprite \
    "evil knight enemy, 2D pixel art, top-down view, simple silhouette" \
    --output Assets/Sprites/enemy_knight.png

# Scaffold Unity MonoBehaviour script
python skills/game-dev-agent/scripts/agent.py code \
    "PlayerMovement: top-down 2D, WASD input, 5 m/s speed" \
    --output Assets/Scripts/PlayerMovement.cs

# Analyze + propose balance changes
python skills/game-dev-agent/scripts/agent.py balance \
    --config Assets/Configs/enemies.json \
    --goal "make wave 5 challenging but beatable"

# Generate BGM via Suno (operator provides Suno prompt template)
python skills/game-dev-agent/scripts/agent.py audio \
    --style "lofi dungeon synth, slow, atmospheric" \
    --output Assets/Audio/BGM_dungeon.mp3

Architecture

Same pattern as Skill #1 (music-video) + Skill #2 (job-hunt):

skills/game-dev-agent/
├── SKILL.md (this file)
├── README.md
└── scripts/
    ├── agent.py                  # CLI entry — argparse subcommands
    ├── modules/
    │   ├── __init__.py
    │   ├── asset_gen.py
    │   ├── code_assist.py
    │   ├── balance_tune.py
    │   ├── audio_gen.py
    │   └── runtime_director.py   # Used by game prototype at runtime
    └── prompts/
        ├── unity_csharp_system.md
        ├── unity_monobehaviour_template.md
        ├── sprite_2d_pixel.md
        └── balance_analyze.md

Development phases

Per [docs/skill-3-design.md](../../docs/skill-3-design.md):

• Day 1: agent.py orchestrator + asset_gen MVP + initial sprite
• Day 2: code_assist (Unity C# scaffold)
• Day 3: balance_tune
• Day 4: utility AI integration (used by game prototype)
• Day 5: runtime_director (AI Director — LLM events)
• Day 6: audio_gen + polish
• Day 7: portfolio docs + demo video + commit

Each end-of-day = build runnable (game prototype side).

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: MelonS
• Source: MelonS/MelonS-Agents
• License: MIT
• Homepage: https://melons.github.io/MelonS-Agents/

Install and usage instructions live in the source repository linked above.