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Sunday, 18 October 2026 Reading Room

Tech

Cropping scanned answer sheets with a QR code as the anchor (Python + OpenCV)

I'm an elementary school teacher in Korea and I build small tools for my own grading. The slowest part was never the grading itself. It was sorting a scanner batch where pages come out shuffled, rotated, and front and back mixed up. The fix that worked: print a small QR in the corner of every sheet. It carries the exam ID, the student number and the side. Then for each scanned page: Find the QR…

dev.to ·

We haven't written up this one. Dev.to has the full story — the link below goes straight to it.

Read the original at dev.to →

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The build went green because it stopped checking

A teammate deleted a test file on a Friday. Not on purpose. The suite still passed. The pipeline still went green. Nobody noticed for three weeks. Here's the part that should bother you.

  • Build passed despite missing crucial health checks
  • Green build did not guarantee code functionality
  • Thorough testing and monitoring needed for reliable code health

·dev.to

Two Agencies Wrote "Top Agencies" Lists — One Put Itself at #1

A reader question sent us down a rabbit hole worth sharing: when agencies write their own "top agencies in the UK" listicles — which, as we found earlier this week , is how the UK's list layer works…

  • Munro Agency claims #1 spot in its Top 12 Content Marketing Agencies list
  • Koozai lists itself at entry #8 in its Best Content Marketing Agencies in the UK list
  • Koozai's list includes criteria for evaluating agencies before naming them

·dev.to

GitView CodeAudit: Go security reviews that never leave your laptop

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built GitView CodeAudit is a security review for Go backends that runs on your laptop.

  • GitView CodeAudit conducts Go backend security reviews on local laptops
  • Provides offline HTML report with evidence and reviewer decisions
  • Free tool for freelancers and small agencies to generate security reports

·dev.to

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