# Changelog of Dev Trend Radar (`heartsome_stalactite/dev-trend-radar`) Actor

- **URL**: https://apify.com/heartsome\_stalactite/dev-trend-radar/changelog.md
- **Full Actor documentation**: https://apify.com/heartsome\_stalactite/dev-trend-radar.md

## Changelog

### \[0.1.0] - 2026-07-22

#### Added

- Initial release
- Cross-source trend radar across GitHub, Stack Overflow, and npm
- Normalized z-score composite per topic
- Weekly snapshot persistence for week-over-week change tracking
- Pay-per-event pricing with `radar-scan` and `extra-topic` events
- Graceful degradation when a source is rate-limited or unavailable
- Input validation with topic format checking and dedup
- Response size capping to prevent memory issues
- Deep snapshot validation to handle corrupted prior data

#### Technical

- TypeScript, Apify SDK v3, no browser, no proxy, no runtime AI
- 160 deterministic tests passing (unit, integration, schema, metamorphic, regression)