AI Game Art Pipeline Agent Skill

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

• Identify the runtime job and target engine.
• Check whether canonical assets already exist.
• Pick one scenario reference below.
• Generate the smallest useful vertical slice, not the full asset set.
• Post-process with deterministic scripts.
• Preview at target size and target device.
• 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.

Provider Adapters

Do not write a full vendor SDK unless the user explicitly asks for one. Prefer a thin adapter around scripts/provider_stub.py so credentials, endpoints, retries, billing, and model choices stay in the user's project.

If the user wants examples, point them to examples/providers/README.md and adapt only the minimal file they need:

• fake/local provider for testing the pipeline without model calls.
• generic image HTTP provider for a user's image-generation proxy.
• generic async video HTTP provider for a user's video-generation proxy.

Output Standard

When using this skill, produce:

• A concise pipeline choice and why.
• The exact assets to generate or reuse.
• Prompt constraints if model generation is needed.
• Post-processing commands/scripts.
• Runtime packaging notes: dimensions, format, anchor, frame rate, texture limits.
• QA checklist for the target device.

Hard Warnings

• Do not regenerate a known character if a canonical sheet exists.
• Do not use 1xN horizontal strips for complex combat poses; use 2D grids.
• Do not let cinematic video own gameplay semantics. Damage, hitboxes, target tracking, cooldown, and SFX belong in code.
• Do not ship giant backgrounds because they look fine on desktop. Check mobile texture limits.
• Do not treat AI output as final. The production asset is the generated image plus cleanup, anchors, timing, compression, and runtime test.