Universal Designer

UniversalDesigner

Overview

UniversalDesigner is a meta-orchestrator ("the conductor") for 24 specialist frontend skills. It does not reimplement animation/3D/design logic — it understands the project, decides the design direction, then calls the right specialist skill(s) via the Skill tool and composes their output into a coherent, performant, accessible result that fits the existing codebase.

Use this skill as the first stop for any visual/frontend task. It guarantees three things every other skill in isolation cannot:

1. The work fits the project's actual architecture (stack, conventions, deps).
2. The right tool is chosen (these skills heavily overlap — picking wrong is the

most common failure: GSAP vs AOS, Three.js vs R3F, Lottie vs Rive, Motion vs Spring).

1. The pieces compose (layering, conflict resolution, perf, a11y, responsive).

The mandatory workflow (run in order)

Follow these phases in order. Skip a phase only with a clear reason.

Phase 0 — Understand the architecture FIRST (never skip)

Before any design decision, learn what is actually being built and on what. Run the bundled detector, then confirm by reading the project:

bash scripts/detect_stack.sh [project-root]   # defaults to CWD

It reports: framework (React/Next/Vue/Svelte/Flutter/vanilla), package manager, which design/animation/3D libraries are ALREADY installed, monorepo layout, and a shortlist of recommended skills. Then verify by hand:

• Read package.json / pubspec.yaml, the framework config, and an existing

component to match conventions (styling system, component patterns, file layout).

• Identify hard constraints. These are project facts, not preferences — e.g.

React 19 peer conflicts (drei was dropped here for that reason), SSR/RSC server→client boundaries in Next, no-authored-assets (Lottie/Rive need source files), or "must not break the Flutter mobile app."

• Decide the layer: design-system/taste, UI motion, scroll, 3D, asset

authoring, or a combination.

Load references/architecture-playbook.md for stack→skill mapping and how to adapt to each architecture. Never recommend installing a library the stack can't support (verify peer deps), and reuse existing design infra rather than rebuilding it.

Phase 1 — Establish design direction (the taste layer)

Decide what it should look and feel like before touching execution skills. Use the three design-system skills in this order (they are complementary, not redundant — see catalog):

1. modern-web-design — strategy: performance budget, accessibility baseline,

motion philosophy, which pattern fits (scrollytelling? 3D viewer? data-viz?).

1. ui-ux-pro-max — structure & rules: run its --design-system first to get

an AI-reasoned system (style, 161 color palettes, 57 font pairings, UX guidelines, anti-patterns) keyed to the product type and stack.

1. frontend-design — taste: commit to ONE bold/refined aesthetic direction,

distinctive typography, spatial composition — so the result is not generic.

For a quick fix or a single component, a lightweight pass through these is fine — scale the ceremony to the task.

Phase 2 — Route execution to specialist skill(s)

Translate the design direction into concrete specialist skills using references/decision-matrix.md (intent → skill, with overlap tie-breakers). Invoke each chosen skill with the Skill tool using its name (e.g. invoke gsap-scrolltrigger, react-three-fiber, motion-framer). Prefer the skill already aligned with the detected stack (React project → R3F/Motion over vanilla Three.js/Anime.js, unless a reason dictates otherwise).

Phase 3 — Compose & integrate

When more than one specialist skill is used (the common case for rich experiences), load references/integration-and-quality.md and apply the layering rules from web3d-integration-patterns: assign each library a layer, make sure two libraries never animate the same property, manage one render loop, and wire state/refs correctly. This is where multi-library work succeeds or breaks.

Phase 4 — Quality gates (always)

Before declaring done, verify against references/integration-and-quality.md:

• Performance: animate transform/opacity only; GPU-accelerate; lazy-load heavy

3D/WebGL; respect a perf budget; dispose Three.js/PixiJS GPU resources.

• Accessibility: honor prefers-reduced-motion; contrast; keyboard nav;

scroll-hijacking has an escape hatch.

• Responsive: works on mobile/tablet/desktop (this repo's standing rule).
• Cleanup: destroy instances / kill tweens / dispose on unmount (memory leaks

are the #1 SPA bug across these libraries).

• Mobile-app safety: if the change touches shared UX, confirm it does not

break the Flutter app in apps/mobile.

The 24 skills at a glance

| Layer | Skills (invoke by name) | |---|---| | Design system / taste | modern-web-design, ui-ux-pro-max, frontend-design | | UI motion (React) | motion-framer, react-spring-physics, animated-component-libraries | | UI motion (agnostic) | animejs | | Scroll & transitions | gsap-scrolltrigger, locomotive-scroll, scroll-reveal-libraries (AOS), barba-js | | 3D engines | threejs-webgl, react-three-fiber, babylonjs-engine, playcanvas-engine, aframe-webxr | | 2D / effects / assets | pixijs-2d, lightweight-3d-effects (Zdog/Vanta/Tilt), lottie-animations, rive-interactive | | 3D authoring pipeline | blender-web-pipeline, spline-interactive, substance-3d-texturing | | Integration meta | web3d-integration-patterns |

Full descriptions, when-to-use, gotchas, and pairings: references/skill-catalog.md.

Fast routing (full matrix in references/decision-matrix.md)

• Simple fade/slide on scroll → scroll-reveal-libraries (AOS). Don't reach for GSAP.
• Complex scroll timeline / pin / scrub / parallax → gsap-scrolltrigger

(+ locomotive-scroll only if smooth-scroll container is required).

• React UI animation / gestures / layout / exit → motion-framer.
• Physics-real, interruptible, momentum motion → react-spring-physics.
• Vanilla/SVG timeline, no React → animejs.
• Pre-built animated React components fast → animated-component-libraries.
• Multi-page site, SPA-feel transitions → barba-js.
• 3D in React → react-three-fiber; 3D vanilla/max control → threejs-webgl;

physics/game/WebXR production → babylonjs-engine; ECS/editor game → playcanvas-engine; VR/AR/360 → aframe-webxr.

• Designer-made AE animation → lottie-animations; stateful interactive vector

→ rive-interactive; decorative bg/tilt, no heavy framework → lightweight-3d-effects; thousands of 2D sprites/particles → pixijs-2d.

• Need 3D assets → author with blender-web-pipeline / spline-interactive,

texture with substance-3d-texturing, render with three/R3F/Babylon.

• Combining 3+ libraries → web3d-integration-patterns for architecture.

Golden rules (guardrails)

1. Architecture before aesthetics. Phase 0 is non-negotiable. A beautiful

component that fights the stack is a defect.

1. Reuse before rebuild. If the project already has motion/effects/3D infra or

components (e.g. existing AnimatedNumber/Accordion/Skeleton/AuthShell), extend them; don't duplicate.

1. Pick one tool per job. Resolve overlaps with the decision matrix; do not

stack two libraries that do the same thing (e.g. AOS + GSAP for the same reveal).

1. Verify deps before suggesting installs. Honor peer-dep constraints (React 19,

SSR/RSC, Flutter). Don't propose an asset-driven skill (Lottie/Rive) when no authored asset exists.

1. Always ship the quality gates (Phase 4). Motion without reduced-motion,

responsiveness, and cleanup is incomplete.

1. Invoke, don't reinvent. Delegate execution detail to the specialist skill

via the Skill tool; UniversalDesigner orchestrates and integrates.

When to load each reference

• references/skill-catalog.md — deep dossier on every skill (what/when/gotchas/pairs).

Load when choosing between similar skills or needing a skill's specifics.

• references/decision-matrix.md — intent→skill routing + overlap tie-breakers.

Load at Phase 2.

• references/architecture-playbook.md — stack detection details + per-architecture

adaptation (React/Next/Vue/Svelte/Flutter/vanilla). Load at Phase 0.

• references/integration-and-quality.md — composition patterns, layer assignment,

conflict resolution, performance & accessibility gates. Load at Phases 3–4.

Source & license

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

• Author: satishTheLegend
• Source: satishTheLegend/universal-designer
• License: MIT

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