Claude Skills by Yuki001

Brainstorm a game idea through one-question-at-a-time designer interviews. Produces game.md, systems-index.md, and art-direction.md, or runs as discussion-only.

Develop game story and narrative through one-question-at-a-time writer interviews. Produces narrative docs under gat/narrative/ or runs as discussion-only. Use when the user wants story, plot, lore, worldbuilding, characters, quests, dialogue, narrative tone, or authored story content for a GAT game.

Generate procedural 3D models from natural-language requests by writing a constrained buildModel(ctx) module that uses Three.js, bundled builders and helpers, deterministic validation and export scripts, PNG previews, and optional browser visual review. Use when needs to create, revise, export, or visually audit programmatic 3D assets in GLB, glTF, OBJ, or STL without Blender or another DCC tool.

Specialized in game numerical design, this skill designs first-pass game balance values, diagnoses and tunes existing systems, and evaluates balance proposals by building and running executable models, simulators, parameter sweeps, and evidence checks. Use for combat, progression, economies, items/builds, PvP/metagames, and random rewards when the task requires concrete numbers or a supported verdict. Do not use for broad qualitative game-design critique without a numeric or systemic balance ...

Review, critique, compare, improve, or stress-test an existing game concept, GDD, mechanic, puzzle, economy, level, theme, emotional arc, interface, narrative, social feature, prototype, pitch, or playtest result. Use when the user asks what is weak, risky, unclear, unbalanced, contradictory, insufficiently engaging, or worth validating next in a game design. Produce evidence-based findings, explicit tradeoffs, and the smallest useful prototype or playtest experiment.

Plan, generate, inspect, vision-evaluate, refine, and package images and visual assets for game development through a backend-agnostic production loop. Use for PNG or SVG props, icons, characters, environments, tiles, UI, HUD/gameplay screens, VFX, transparent cutouts, concept or worldbuilding boards, sprite sheets, static sprite collections, or animation frames; especially when the task needs batch generation, native prompts or ComfyUI/Stable Diffusion Danbooru tags, reference consistency, b...

Comprehensive ImageMagick 7 command-line image processing for inspecting, converting, resizing, cropping, compositing, masking, drawing, annotating, color correction, quantization, filtering, morphology, distortion, animation, montage, comparison, metadata, batch automation, and advanced pixel analysis. Use whenever a task mentions ImageMagick, `magick`, `identify`, `mogrify`, raster image conversion or batch image manipulation, or when a reproducible CLI pipeline is preferable to a GUI or la...

Remove image backgrounds locally with Lucida's bgr CLI and save transparent RGBA PNGs while preserving soft alpha in glass, smoke, glow and VFX, camouflage, text and logos, line art, illustrations, and print designs. Use when a user asks to remove, erase, isolate, cut out, or make the background of an image transparent; prefer Lucida for translucent or effect-heavy artwork and BiRefNet-HR for high-resolution solid physical objects or product photos.

Generate images through OpenRouter's dedicated Image API. Use this skill whenever the user wants to create, render, generate, or save images with OpenRouter, including text-to-image, image-to-image/reference images, choosing OpenRouter image models, listing image models, setting resolution/aspect ratio/quality/output format, or passing provider-specific image options. Prefer the bundled Python script so API options are passed explicitly as command-line arguments instead of hand-written ad hoc...

Generate and download videos through OpenRouter's dedicated asynchronous Video API. Use this skill whenever the user wants to create, render, generate, poll, resume, or save an OpenRouter video, including text-to-video, first/last-frame image-to-video, reference-to-video, choosing or listing video models, setting duration/resolution/aspect ratio/audio/seed, checking job status, downloading completed outputs, configuring callbacks, or passing provider-specific video options. Prefer the bundled...

Extract ordered still-image frames from local video files with FFmpeg, using a fixed FPS, an exact frame count, explicit timestamps, or every source frame; optionally remove a flat chroma-key background and emit timing metadata. Use for video-to-frame conversion, animation frame sampling, contact-sheet inputs, sprite animation source frames, dataset frames, thumbnail sequences, or any request to split MP4, WebM, MOV, MKV, AVI, or other FFmpeg-readable video into PNG, WebP, or JPEG images.

Run the full design pipeline with brainstorm wizard, or add one missing system.

Implement one ready task from a milestone tasks.md.

Break the project into milestones and create production/milestone.md plus milestone directories.

Create tasks.md, tech.md, and art-prompts.md for one milestone.

Inspect the repo state and recommend the next step in the simplified workflow.

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 mo...

A specialized skill for implementing and configuring animation-style shaders (Toon Shaders) in 3D rendering engines. It provides guidance on various techniques like outlines, rim lighting, and special effects using popular shader libraries.

A documentation-focused skill for game architecture design. Produces technical selection, design, and planning documents through a structured pipeline. Use this skill to generate requirement analysis, technical design, and implementation planning documents for new game projects or major feature development.