Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
17 playbooks
Debugging Env Var Issues
A concise checklist for incidents where local works but CI, staging, or production changes behavior.
Debugging Cache Stampedes
How to recognize and contain request spikes when cached data expires.
Debugging CORS Origin Bugs
A practical way to inspect origin parsing, credentials, and header behavior.
Debugging Retry Bugs
Retry issues often hide the first failure and create duplicate work.
Debugging Timezone Bugs
Time bugs usually live at day boundaries, DST changes, and unit conversions.
Debugging Pagination Bugs
Pagination bugs hide in boundary math, cursor reuse, and new records arriving between pages.
Structured investigations for the failure modes engineers meet in real systems.
Why esbuild Isn't Removing Dead Code: Side Effects, IIFE Wrappers, and Import Semantics
A practical guide to diagnosing and fixing esbuild tree-shaking failures caused by side-effect flags, IIFE wrappers, and import semantics.
Debugging Rollup Named Export Not Found Errors
A practical guide to diagnosing and fixing 'named export not found' errors in Rollup, covering common causes like tree-shaking, mismatched exports, and plugin interactions.
Debugging Babel Transform Plugin Errors
A practical guide to diagnosing and fixing errors from Babel transform plugins, including plugin ordering, configuration, and version mismatches.
Tailwind CSS Class Not Being Applied? Debug the Pipeline
A systematic walkthrough for when a Tailwind utility class is present in your HTML but the styles don't render in the browser.
Tailwind CSS Purge Removing Used Classes: How to Debug
Debug why Tailwind's purge feature removes classes you are actually using in your templates.
Webpack Code Splitting: Lazy-Loaded Chunk Fails to Load
A guide to debugging webpack dynamic imports where the split chunk never loads, causing blank screens or missing UI sections.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Five Debugging Habits That Separate Seniors from Juniors
It's not tools. It's not years of experience. It's five repeatable habits that senior engineers do reflexively and juniors haven't built yet.
Why Your Production Logs Are Lying to You
Logs tell you what the code reported. They almost never tell you what actually happened. Here is the gap, and how to close it.
The Real Cost of Console.log Debugging (and What to Use Instead)
Every engineer reaches for console.log. Most do not think about what it costs — in time, in performance, or in production readiness. Here is the honest accounting.
Interpreting Stack Traces: Practical Steps for Faster Debugging
Stack traces can be dense, but reading them fluently accelerates triage and root cause analysis. This article explains how to extract actionable information, with real-world context.
Efficient Debugging with git bisect: Going Beyond Binary Search
This article explains how to incorporate git bisect into your debugging workflow, focusing on practical execution, automation, and common edge cases.
Applying Rubber Duck Debugging to Complex Engineering Problems
Rubber duck debugging isn’t just a quirky solo exercise. I’ll show how explaining code out loud surfaces misunderstandings and reduces wasted team cycles.