Scraping: fail loudly when the page layout changes
A scraper that parses nothing and exits 0 looks healthy while it fills your database with gaps. A count check and a saved fixture catch it.
Testing
TIL: Vite reads the nearest tsconfig, not the one that includes it
Hundreds of tests failed with React is not defined. The fix was one line in the tsconfig that the component files actually resolve to.
Puppeteer in production: fallback selectors, real waits, clean exits
A Facebook class rename stopped 100+ accounts from posting. The fix: ARIA selectors, real waits, finally cleanup, a lock per account and screenshots on error.
