# Platform Building

> Platform-specific building systems for mobile, VR, and accessibility. Use when implementing touch controls for building games, VR spatial input, colorblind-friendly feedback, or cross-platform building mechanics. Covers input adaptation and inclusive design patterns.

- **Type:** Skill
- **Install:** `agentstack add skill-bbeierle12-skill-mcp-claude-platform-building`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Bbeierle12](https://agentstack.voostack.com/s/bbeierle12)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [Bbeierle12](https://github.com/Bbeierle12)
- **Source:** https://github.com/Bbeierle12/Skill-MCP-Claude/tree/main/skills/platform-building

## Install

```sh
agentstack add skill-bbeierle12-skill-mcp-claude-platform-building
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Platform Building

Touch controls, VR input, and accessibility patterns for building systems.

## Quick Start

```javascript
import { TouchBuildController } from './scripts/touch-build-controller.js';
import { VRBuildingAdapter } from './scripts/vr-building-adapter.js';
import { AccessibilityConfig } from './scripts/accessibility-config.js';

// Mobile touch building
const touch = new TouchBuildController(canvas, {
  doubleTapToPlace: true,
  pinchToRotate: true,
  swipeToChangePiece: true
});

touch.onPlace = (position, rotation) => buildingSystem.place(position, rotation);
touch.onRotate = (angle) => ghost.rotate(angle);

// VR building with hand tracking
const vr = new VRBuildingAdapter(xrSession, {
  dominantHand: 'right',
  snapToGrid: true,
  comfortMode: true // Reduces motion sickness
});

vr.onGrab = (piece) => selection.select(piece);
vr.onRelease = (position) => buildingSystem.place(position);

// Accessibility configuration
const a11y = new AccessibilityConfig({
  colorblindMode: 'deuteranopia', // red-green
  highContrast: true,
  screenReaderHints: true
});

// Apply to ghost preview
ghost.setColors(a11y.getValidityColors());
```

## Reference

See `references/platform-considerations.md` for:
- Mobile gesture patterns (Fortnite Mobile, Minecraft PE)
- VR building research and comfort guidelines
- Colorblind palette recommendations
- Screen reader integration patterns
- Cross-platform input abstraction

## Scripts

| File | Lines | Purpose |
|------|-------|---------|
| `touch-build-controller.js` | ~450 | Mobile gestures: tap, drag, pinch, swipe |
| `vr-building-adapter.js` | ~400 | VR hand/controller input, comfort settings |
| `accessibility-config.js` | ~350 | Colorblind modes, contrast, screen reader |

## Platform Detection

```javascript
// Detect platform capabilities
const platform = {
  isMobile: /Android|iPhone|iPad|iPod/i.test(navigator.userAgent),
  isTouch: 'ontouchstart' in window,
  isVR: navigator.xr !== undefined,
  prefersReducedMotion: window.matchMedia('(prefers-reduced-motion: reduce)').matches,
  prefersHighContrast: window.matchMedia('(prefers-contrast: more)').matches
};

// Initialize appropriate controllers
if (platform.isVR && xrSession) {
  setupVRControls();
} else if (platform.isTouch) {
  setupTouchControls();
} else {
  setupMouseKeyboard();
}
```

## Mobile Considerations

Fortnite Mobile demonstrates effective touch building with customizable HUD, auto-material selection, and gesture-based piece rotation. Key patterns include dedicated build mode toggle, large touch targets (minimum 44px), and visual feedback for all actions.

## VR Considerations

VR building requires attention to comfort. Snap rotation reduces motion sickness, and arm-length building distances prevent fatigue. Hand tracking enables intuitive grab-and-place, while controller building benefits from laser-pointer selection for distant pieces.

## Accessibility Patterns

Valheim uses blue/yellow instead of green/red for stability indicators, supporting deuteranopia (the most common colorblind condition). High contrast modes should use 7:1 ratio for critical indicators, and all visual feedback should have audio/haptic alternatives.

## Source & license

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

- **Author:** [Bbeierle12](https://github.com/Bbeierle12)
- **Source:** [Bbeierle12/Skill-MCP-Claude](https://github.com/Bbeierle12/Skill-MCP-Claude)
- **License:** MIT

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

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-bbeierle12-skill-mcp-claude-platform-building
- Seller: https://agentstack.voostack.com/s/bbeierle12
- Browse the marketplace: https://agentstack.voostack.com/browse

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