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My QR codes passed every test and failed my users' scanners — the quiet zone isn't decoration

This story is from 2026-10-12. It is preserved in the archive; the latest stories are on the live feed.

A while back I built a QR/barcode generator API — one call returns a PNG or SVG, base64-encoded, with symbologies from qrcode to EAN-13. The first bug report came not from a human but from a consuming agent: its OpenCV QRCodeDetector returned nothing on every image I produced, while my own test sui…

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  1. 2026-10-12 12:05 · DEV Community — AI
    My QR codes passed every test and failed my users' scanners — the quiet zone isn't decoration

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