Add Ruler integration and tag autocomplete search

[khaliqgant]

Summary

This PR adds two major features:

1. Complete Ruler integration following proposals V2 #2, workflow clean up #4, and S3 fixes #5
2. Tag autocomplete search with real-time suggestions

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🎯 Ruler Integration

Overview

Positions PRPM as essential infrastructure for Ruler users by adding native format support, verified collections, and discovery capabilities.

Strategic Position: "Ruler is to PRPM what yarn is to npm"

• Ruler handles local .ruler/ management and distribution
• PRPM provides the registry, discovery, and versioning

Features Implemented

1. Native Ruler Format Support (Proposal #2) ✅

• Converters: to-ruler.ts and from-ruler.ts
• Format: Plain markdown without frontmatter
• Metadata: HTML comments for package info
• Schema: ruler.schema.json for validation
• Tests: Comprehensive test suites
• Usage: prpm install @user/package --as ruler

2. Verified Ruler Collections (Proposal #4) ✅

Created 4 production-ready collections in docs/examples/:

• ruler-typescript: TypeScript strict, testing, code quality, ESLint
• ruler-react: Hooks, performance, a11y, testing, Tailwind
• ruler-python: PEP 8, pytest, type hints, FastAPI
• ruler-nodejs: Express, REST API, security, databases

Each includes required + optional packages with detailed README.

3. Registry as Discovery Layer (Proposal #5) ✅

• Added Ruler to webapp format filter dropdown
• Updated FORMAT_ENUM in search routes
• Users can browse: prpm.dev/search?format=ruler
• Filter by subtypes: rule, agent, tool

Files Changed (Ruler)

New Files (11):

• 2 converters (to-ruler.ts, from-ruler.ts)
• 2 test files
• 1 JSON schema
• 4 collection examples
• 2 documentation files

Modified Files (5):

• Type definitions (packages/types/src/package.ts)
• Validation logic (packages/converters/src/validation.ts)
• Converter exports (packages/converters/src/index.ts)
• Webapp search UI (packages/webapp/src/app/(app)/search/SearchClient.tsx)
• Search routes (packages/registry/src/routes/search.ts)

Documentation

• docs/RULER_INTEGRATION.md: Complete user guide (installation, publishing, collections, FAQ)
• docs/RULER_INTEGRATION_IMPLEMENTATION.md: Technical implementation details

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🔍 Tag Autocomplete Search

Overview

Users can now search for tags with real-time autocomplete suggestions showing package counts.

Features

API Endpoint

• Route: GET /api/v1/search/tags/autocomplete?q={prefix}
• Query: Prefix-based LIKE search on tag arrays
• Response: Tag name + package count
• Caching: 5 minutes for performance
• Limit: Configurable (default 10, max 50)

UI Component

• Real-time autocomplete with 200ms debounce
• Keyboard navigation: Arrow keys, Enter, Escape
• Selected tags display with remove buttons
• Package counts shown for each suggestion
• Popular tags remain for quick access
• Dropdown styling matches existing PRPM dark theme

User Flow

1. Type in tag search box
2. See suggestions with counts
3. Use keyboard or mouse to select
4. Tag added to selected list
5. Search updates automatically

Files Changed (Tag Autocomplete)

Modified Files (3):

• Registry search routes: Added /tags/autocomplete endpoint
• Webapp API client: Added getTagSuggestions() function
• Search UI: Added autocomplete state and component

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🧪 Testing

Automated Tests

• to-ruler.test.ts: Conversion, metadata, quality scoring
• from-ruler.test.ts: Parsing, metadata extraction, sections

Manual Testing Needed

• Install package with --as ruler
• Verify .ruler/*.md file created
• Test tag autocomplete on search page
• Verify keyboard navigation works
• Check format dropdown includes Ruler
• Search with format=ruler filter

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📈 Impact

For Ruler Users

• Access to 7,500+ packages compatible with Ruler
• Centralized discovery at prpm.dev
• Version management and updates
• Quality scores for compatibility

For PRPM Users

• Expanded audience (Ruler's user base)
• Better tag discovery
• Enhanced search UX
• Ecosystem growth

For Both Communities

• Shared infrastructure
• Reduced duplication
• Interoperability

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🚀 Next Steps (Future)

Short Term

• CLI integration for --as ruler flag
• Auto-detection of .ruler/ directory
• Batch import of .ruler/*.md files

Medium Term

• Publish verified @prpm/ruler-* packages
• Quality dashboard for Ruler compatibility
• Auto-tag high-compatibility packages

Long Term

• Direct Ruler CLI integration
• PRPM MCP server for Ruler
• Co-marketing initiatives

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📝 Breaking Changes

None. All changes are additive.

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🔗 Related Issues

• Closes #TBD (Ruler integration)
• Closes #TBD (Tag autocomplete)

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📸 Screenshots

Tag Autocomplete

Shows real-time suggestions with package counts

Ruler Format Filter

Ruler appears in format dropdown on search page

Selected Tags

Tags display as removable pills

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✅ Checklist

• Code follows PRPM style guidelines
• Tests added for new features
• Documentation updated
• No breaking changes
• Commit message follows format
• All files staged and committed