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.
Webpack Module Federation Remote Not Loading: Debugging Guide
A practical debugging guide for when a Webpack 5 Module Federation remote fails to load, including specific commands, config checks, and real-world root causes.
Vite Path Alias Not Resolving: The Complete Debugging Guide
A practical debugging guide for when Vite's path aliases (like `@/components`) fail to resolve, covering configuration pitfalls, IDE integration, and build-time errors.
Webpack Source Maps Not Working – Debugging Guide
A practical guide to debugging when Webpack source maps are missing, broken, or point to wrong files in development and production.
React Native Metro Bundler Error: Complete Debugging Guide
A practical guide to diagnosing and fixing Metro bundler errors in React Native, covering cache issues, module resolution, and Babel misconfigurations.
Debugging React Native Native Bridge Module Errors
A hands-on guide to diagnosing and fixing native bridge module failures in React Native, covering iOS and Android integration issues.
Debugging React Native Android Gradle Build Failures
A practical guide to diagnosing and fixing Gradle build errors in React Native Android projects, covering cache issues, dependency conflicts, and configuration problems.
Long-form thinking on debugging habits, observability, and the systems around the bug.
How to Read Error Messages: A Debugging Protocol
Most engineers skim error messages and miss the signal. Here's a repeatable protocol for extracting maximum information from stack traces, log lines, and crash dumps — with a real incident walkthrough.
When to Escalate a Bug: A Decision Framework for Junior and Mid-Level Engineers
A practical framework for junior and mid-level engineers to decide when to escalate a bug, with real-world examples and criteria beyond time spent.
Debugging vs. Firefighting: Why Treating Production Incidents as Debugging Sessions Fails
When production goes down, your brain wants to debug. That instinct costs you hours. Here's why firefighting requires a fundamentally different approach, and the specific process I use to switch modes.
Writing an Incident Runbook That Actually Gets Used in Production
A runbook isn't a document—it's a tool. Here's how to write one that reduces MTTR and doesn't embarrass you during the next PagerDuty alert.
Debugging a production incident with your boss on Slack: staying rational when everything is on fire
A personal account of debugging a cascading Redis failure while the VP of Engineering watched, and the mental models that kept the fix from turning into a rollback.
Reading Distributed Traces to Find Latency: A Field Guide
Tracing tools generate a firehose of data. Here's how to filter the signal from the noise and actually find the root cause of high latency.