feat(core): implement detailed statistics aggregation infrastructure #155
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Implement data collection infrastructure for dashboard visualizations with language breakdown, component type tracking, and monorepo support. **New Features:** - StatsAggregator class with streaming O(1) aggregation - Language-specific stats (TypeScript, JavaScript, Go, Markdown) - Component type counting (function, class, interface, type, variable) - Package/monorepo detection infrastructure - TypeScript vs JavaScript distinction based on file extension **Types Added:** - SupportedLanguage type - LanguageStats interface (files, components, lines) - PackageStats interface (name, path, languages) - DetailedIndexStats extending IndexStats **Changes:** - Extended IndexStats with optional byLanguage, byComponentType, byPackage - Fixed TypeScript scanner to detect .ts vs .js based on extension - Integrated StatsAggregator into index() and update() methods - All stats backward compatible (optional fields) **Testing:** - 14 unit tests for StatsAggregator (all passing) - 6 integration tests for detailed stats (all passing) - Performance: <5% overhead (10k documents in <100ms) - 508 total core tests passing Related: #146 (Data Collection Infrastructure) Part of Epic #145 (Dashboard & Visualization System)
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Summary
Implements data collection infrastructure for dashboard visualizations (#146) as part of the Dashboard & Visualization System epic (#145).
Key Features:
Changes
New Components
StatsAggregatorclass - Efficient streaming stats collectionDetailedIndexStatsinterface - Extends IndexStats with optional breakdowns.tsvs.js)Type System
SupportedLanguagetypeLanguageStatsinterface (files, components, lines)PackageStatsinterface (name, path, languages)Integration
RepositoryIndexer.index()RepositoryIndexer.update()DetailedIndexStatswith language and component breakdownsTest Plan
✅ 20 new tests added (all passing)
StatsAggregator✅ 508 total core tests passing
✅ Performance verified:
Test Coverage
Backward Compatibility
✅ Fully backward compatible
byLanguage?,byComponentType?,byPackage?)Related Issues