Create tasks.md, tech.md, and art-prompts.md for one milestone.
npx skills add https://github.com/Yuki001/game-dev-skills --skill gat-planCopy and paste this command into Claude Code to install the skill
Use this skill whenever a user asks to generate, create, draw, render, or edit images with GPT Image 2 / gpt-image-2, text-to-image, reference-image editing, inpainting, posters, typography, Chinese text, UI mockups, diagrams, or gallery prompts. Analyze the user's prompt, search the bundled Reference Gallery/craft files for matching design patterns, confer on direction when useful, then call the bundled CLI script directly. Do not write new image-generation code unless explicitly asked to modify this repo.
READ this skill when designing or planning any game system architecture — including combat, skills, AI, UI, multiplayer, narrative, or scene systems. Contains paradigm selection guides (DDD / Data-Driven / Prototype), system-specific design references, and mixing strategies. Works as a domain knowledge plugin alongside workflow skills (OpenSpec, SpecKit) or plan mode of an agent.
Inspect the repo state and recommend the next step in the simplified workflow.
Run the full design pipeline with brainstorm wizard, or add one missing system.
READ this skill when implementing or configuring animation-style shaders (Toon/Cel Shaders) — including outlines, rim lighting, toon shading, MatCap, emission, dissolve, hatching, or any stylized rendering effect. Contains preset styles and feature-to-reference mappings for lilToon, Poiyomi, UTS2, RToon, SToon, and ToonShadingCollection. Works as a domain knowledge plugin alongside workflow skills (OpenSpec, SpecKit) or plan mode of an agent.
Implement one ready task from a milestone tasks.md.
| name | gat-plan |
| description | Create tasks.md, tech.md, and art-prompts.md for one milestone. |
| argument-hint | [milestone-id | milestone-directory] |
| user-invocable | true |
| allowed-tools | Read, Glob, Grep, Write, Edit, Agent, AskUserQuestion |
This skill writes for one milestone:
production/milestone-xx-name/tasks.mdproduction/milestone-xx-name/tech.mdproduction/milestone-xx-name/art-prompts.mdFail if any of these are missing:
design/gdd/game.mddesign/gdd/systems-index.mdproduction/milestone.mdRead:
design/gdd/game.mddesign/gdd/systems-index.mddesign/gdd/*.md except game.md and systems-index.mddesign/art/art-direction.md if existsdesign/art/*-art.mdproduction/milestone.md.claude/docs/templates/plan/tasks.md.claude/docs/templates/plan/tech.md.claude/docs/templates/plan/art-prompts.mdResolve the target milestone:
tasks.mdtasks.md, choose the first lacking tech.mdStop if no milestone can be resolved.
Read existing milestone files if present:
production/milestone-xx-name/tasks.mdproduction/milestone-xx-name/tech.mdproduction/milestone-xx-name/art-prompts.mdSpawn gat-planner agent to write tasks.md:
After planner finishes, spawn both:
gat-programmer agent → write tech.md:
gat-artist agent → write art-prompts.md:
Summarize: milestone planned, task count, tech systems covered, prompt entries added.
Use AskUserQuestion:
Implement first task (Recommended) → Run /gat-implementStop here