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Practical walkthroughs for building and shipping software, and root-cause breakdowns for when it stops working.
A build that works on your machine and fails in GitHub Actions is almost always one of six differences. How to identify which one, and how to stop the class of problem rather than the instance.
Why an LLM that returns JSON in testing starts returning markdown fences, prose preambles, or truncated objects in production — and the four fixes, in the order worth trying them.
Practical guide for diagnosing and fixing heap memory leaks in Node.js applications. Covers common causes, tools, and step-by-step debugging workflow.
Comprehensive guide for diagnosing slow PostgreSQL queries, missing indexes, N+1 query patterns, and connection pool bottlenecks.
Step-by-step guide to fixing Next.js and React hydration mismatch errors (#418, #425). Explains causes like window checks, browser extensions, and date formatting.