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Slug Validator Field Guide: When Five Rules Decide the Permalink Shape
A valid URL slug isn't a guess. It's the lowest-common-denominator format every CMS, every CDN…
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BOM Character Remover — Field Guide: When an Invisible Three Bytes Eat Your First CSV Column
A practical field guide to BOM detection, the four places one hides, and the rules for removing it without corrupting the rest of your file.
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OAuth PKCE Field Guide: When the code_verifier and the intercepted code sit on the same wire
The defense against an intercepted OAuth authorization code isn’t a clever rate-limit or a long-lived…
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Vowel-Consonant Processor Field Guide: When Letter Inventory Beats Naive String Counting
Counting vowels is the kind of task every junior developer thinks they can do in…
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URL Query Analyzer Field Guide: When Five Flags, Three Encoding Traps, and One Frequency Histogram Decide Whether Your Batch Lands Clean or Silently Drops a Third of Your UTM Tags
A single missing flag in a query parser can drop 30 percent of your analytics…
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A Friday-Night A11y Audit: How the Screen Reader Simulation Tester Catches What a Screenshot Diff Misses
You ship the landing page on a Friday afternoon. The marketing team has signed off,…
SVG Sprite Sheet Generator Field Guide: When Thirty Icons Need to Ship as One File, Five Decisions Decide What Your Build Sees
SVG Sprite Sheet Generator: When Thirty Icons Need to Ship as One File, Five Decisions…
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Regex Debugger Field Guide: When Five Decisions, One Trace Timeline, and the Backtrack Panel Decide Whether Your Regex Lands a Match or Burns 10 ms on a Catastrophic Pattern
A regex that "works" in your editor can quietly do three different things when you…
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UAX #9 Bidi, Rule by Rule: Why Trusting the Renderer Costs You Hours
When text contains both Latin and Arabic, the bytes you wrote are not the bytes…
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SVG Sprite Sheet Generator Field Guide: When Five Decisions Decide Whether Your Icon Library Loads Once or Fights the Browser
Most icon-system performance problems are actually sprite-architecture problems. When a design system ships a dozen…