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.
Stripe Webhook Signature Verification Failed: A Debugging Guide
Diagnose and fix Stripe webhook signature verification failures. Covers common causes like clock drift, wrong signing secret, and raw body mismatches.
OpenAI API 429 Rate Limit Error: Diagnosis and Fixes
A focused guide on diagnosing and resolving HTTP 429 rate limit errors from the OpenAI API, covering root causes, retry strategies, and monitoring.
SendGrid Email Not Delivered: Diagnosing Silent Delivery Failures
A practical guide to diagnosing why SendGrid emails are accepted but never arrive, covering SPF/DKIM, bounces, suppression lists, and IP reputation.
Debugging LangChain Chain Output Errors: A Practical Guide
A hands-on guide to debugging LangChain chain output errors, covering common causes, quick diagnosis, and fixes.
Firebase Security Rules Blocking Requests: Debugging Guide
A practical guide to debugging Firebase Security Rules that unexpectedly deny requests. Covers simulator pitfalls, missing auth tokens, and rule ordering issues.
Debugging Firebase Realtime Database Offline Sync Failures
A focused guide to diagnosing and fixing when Firebase Realtime Database fails to sync data while offline, covering local state mismatches, conflict resolution, and connectivity edge cases.
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.