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.
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Structured investigations for the failure modes engineers meet in real systems.
Diagnosing Next.js App Router Layout Not Rendering
How to debug and fix the issue where your Next.js App Router layout component fails to render as expected.
Why Your React Error Boundary Isn’t Catching Errors
Pinpoint why your React error boundaries fail to catch component errors, including async mistakes, event handler pitfalls, and rendering issues.
Diagnosing Next.js Custom Webpack Config Failures
Understand and resolve Next.js custom Webpack configuration errors with this focused debugging guide. Fix cryptic build failures and get back to shipping.
Debugging React Lazy: 'Loading Chunk Failed' in Suspense Lazy Components
A real-world, engineer-tested debugging guide for diagnosing and resolving React's 'Loading Chunk Failed' error with lazy-loaded components and Suspense.
Next.js Server Component Incorrectly Using Client Hooks
Diagnose and fix the common pitfall of using React client-only hooks in Next.js server components, including boundary errors and misconfiguration traps.
Zustand Persist Middleware Not Saving or Loading State
How to diagnose and fix persistent state bugs with Zustand's persist middleware in React. Get concrete steps, real root causes, and effective solutions.
Long-form thinking on debugging habits, observability, and the systems around the bug.
How to Debug Legacy Code Without Losing Your Mind
A pragmatic approach to debugging code you didn't write, with techniques for tracing execution, isolating side effects, and making safe edits.
Debugging Feature Flag Rollouts: Tracing the Live-at-5 Incident
A misconfigured feature flag triggered a cascading failure in production. Here's how we traced the root cause and built a better debugging toolkit.
How to Ask for Debugging Help Without Wasting Everyone's Time
Asking for debugging help is a skill. Here's how to provide enough context, show your work, and frame the problem so others can actually help you.
Documenting Bugs: A Postmortem-Driven Approach That Cut Recurrence by 60%
Most bug write-ups are useless. Here's a structured, postmortem-driven approach that reduced bug recurrence by 60% in our team — with templates and a real incident walkthrough.
Debugging as Hypothesis Testing: A Mental Model for Systematic Root Cause Analysis
Most debugging is frantic guessing dressed up as experience. Here's a mental model that treats debugging as a scientific process — form hypotheses, design experiments, and isolate root causes systematically.
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.