AI Game Art Pipeline — скилл

##### SKILL.md 200
---
name: ai-game-art-pipeline
description: Provider-neutral open-source skill for planning and producing game-runtime art assets and animation: static props/icons, canonical character sheets, combat sprites, 3D/video motion references, Veo/Seedance-style video-to-frames, cinematic ultimates, backgrounds, FX, SFX, runtime packaging, and QA. Use when building actual game assets for PixiJS/Canvas/Unity/Godot/SpriteKit/etc., not one-off marketing images.
---

# AI Game Art Pipeline

Use this skill when a user wants to generate, plan, debug, or package game art that must run in an actual game runtime.

The skill is provider-neutral. It does not assume any specific API key or vendor SDK. If a model call is needed, use the user's available provider through an adapter or ask them to implement `scripts/provider_stub.py`.

## Core Rule

Pick the pipeline by runtime job, not by model hype.

| Runtime job | Pipeline |
|---|---|
| Static props, items, FX icons | Image model + style refs + removable background |
| Existing/brand character | Reuse canonical sprite sheets before regenerating |
| Combat character animation | Keyframe-first + 2D grid + post-processing + curation |
| Walk/run/body mechanics | Prefer video motion reference; use 3D skeleton only when cleanup is acceptable |
| Ambient loops | Video model -> extracted frames |
| Cinematic ultimate / boss intro | Full-screen video-to-frames + code-driven hit logic |
| Runtime feel | Deterministic code: hit pause, shake, particles, trails, SFX |

## Default Workflow

1. Identify the runtime job and target engine.
2. Check whether canonical assets already exist.
3. Pick one scenario reference below.
4. Generate the smallest useful vertical slice, not the full asset set.
5. Post-process with deterministic scripts.
6. Preview at target size and target device.
7. Iterate surgically: rerun one animation, reprocess raw output, or repack frames.

## Scenario References

Read only the relevant file:

- `references/static-assets.md` — props, icons, items, simple monsters, canonical asset reuse.
- `references/battle-sprites.md` — keyframe-first combat sprite sheets, 2D grids, anchors, contact sheets.
- `references/motion-video.md` — 3D skeleton pitfalls, video motion references, Veo/Seedance-style video-to-frames, cinematic ultimates.
- `references/backgrounds.md` — level backgrounds, master-first parallax, outpaint chains, mobile texture limits.
- `references/runtime-shipping.md` — formats, compression, CDN layout, audio/SFX, runtime QA.

## Bundled Scripts

Scripts are local utilities only. They do not call model APIs.

- `scripts/provider_stub.py` — adapter interface the user can implement for their provider.
- `scripts/chroma_key_magenta.py` — remove magenta background from generated sheets/icons.
- `scripts/sheet_contact.py` — make numbered contact sheets for curation.
- `scripts/extract_video_frames.py` — extract/resize video frames for runtime texture sequences.