feat: introduce UI/UX Pro Max skill with comprehensive guidelines, data, and search functionality across various tech stacks.

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Antigravity Kit is an AI-powered design intelligence toolkit providing searchable databases of UI styles, color palettes, font pairings, chart types, and UX guidelines. It works as a skill/workflow for AI coding assistants (Claude Code, Windsurf, Cursor, etc.).
+
+## Search Command
+
+```bash
+python3 .claude/skills/ui-ux-pro-max/scripts/search.py "<query>" --domain <domain> [-n <max_results>]
+```
+
+**Domain search:**
+- `product` - Product type recommendations (SaaS, e-commerce, portfolio)
+- `style` - UI styles (glassmorphism, minimalism, brutalism)
+- `typography` - Font pairings with Google Fonts imports
+- `color` - Color palettes by product type
+- `landing` - Page structure and CTA strategies
+- `chart` - Chart types and library recommendations
+- `ux` - Best practices and anti-patterns
+- `prompt` - AI prompts and CSS keywords
+
+**Stack search:**
+```bash
+python3 .claude/skills/ui-ux-pro-max/scripts/search.py "<query>" --stack <stack>
+```
+Available stacks: `html-tailwind` (default), `react`, `nextjs`, `vue`, `svelte`, `swiftui`, `react-native`, `flutter`
+
+## Architecture
+
+```
+.claude/skills/ui-ux-pro-max/    # Claude Code skill
+├── SKILL.md                      # Skill definition with workflow instructions
+├── scripts/
+│   ├── search.py                 # CLI entry point
+│   └── core.py                   # BM25 + regex hybrid search engine
+└── data/                         # CSV databases (styles, colors, typography, etc.)
+    └── stacks/                   # Stack-specific guidelines (8 CSV files)
+
+.windsurf/workflows/              # Windsurf workflow copy
+.agent/workflows/ui-ux-pro-max/   # Generic agent workflow copy
+.shared/ui-ux-pro-max/            # Shared data copy
+```
+
+The search engine uses BM25 ranking combined with regex matching. Domain auto-detection is available when `--domain` is omitted.
+
+## Sync Rules
+
+When modifying files, keep all agent workflows in sync:
+
+- **Data & Scripts** (`data/`, `scripts/`): Copy changes to `.shared/ui-ux-pro-max/`
+- **SKILL.md**: Update corresponding files in `.agent/`, `.cursor/`, `.windsurf/`
+
+## Prerequisites
+
+Python 3.x (no external dependencies required)