Fixing Bugs Is Easy. Preventing Their Return Is Hard
Most developers celebrate when they identify the root cause of a bug. The debugger finally reveals the problem. The fix is coded. Tests pass. A pull r…
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Hiring Tip: Pair Program on Open Source Bugs
Hiring Tip: Pair Program on Open Source Bugs to Ship Faster We recently watched a junior engineer spend three weeks reading a tutorial series before t…
How I Fixed Canonical URLs Pointing to Localhost in Next.js
Next.js sites using process.env.SITE_URL || 'http://localhost:3000' as a canonical URL fallback will fail Google indexing entirely. The fix: one centr…
[iOS] Why Passthrough MP4 Export Failed for iPhone Videos
A user picks a video from Photos. The app turns that video into a file the server can accept. Then it uploads the file. On the surface, this sounds li…
The RL Flywheel That Actually Works
The RL Flywheel That Actually Works Here's what's breaking: You've got a reinforcement learning setup that trains, validates, deploys, and then... not…
When Soldering Doesn't Fix It: Swap the MCU
A hardware-debugging technique that uses your portable firmware codebase as the diagnostic tool. Plus the deeper bug it exposed once I got past the ha…
Ghost in the Stack (Part 1): Why uninitialized variables remember old data
Have you ever written a C program, run it, and watched it print values you never assigned? At first glance, it feels almost as if old data is haunting…
Ghost Bugs Cost $40K: A Neural Debugging Postmortem
When AI silently fails for weeks A production RAG system handling 12,000 queries/day recently ran for three weeks delivering silent errors, resulting …
How to audit what your IDE extension actually sends to the cloud
The problem nobody warns you about I installed a new AI coding assistant last month. Within a week, my laptop fan was spinning constantly, my battery …
I audited our CMS and 86% of our articles were invisible. A Sanity gotcha.
A week ago I ran a routine count on our Sanity dataset, expecting maybe a 5% gap between drafts and published articles. The result was 33 published, 2…
WordPress plugin conflicts: how to diagnose and fix them without breaking client sites
Plugin conflict. Two words that ruin an afternoon. A client calls. Their site is broken -- something stopped working after an update, or after adding …
How to Debug a Blank Power Apps Gallery
A blank gallery in Power Apps does not always mean your app is broken. Most gallery issues come from one of these areas: The Items property A filter r…
Stop Putting dd() Everywhere Debug the Database From the Source Instead
Every backend developer has done this at some point. A request fails. Something is not inserting into the database. And suddenly the codebase turns in…
Your WebSocket says "connected" but stopped sending data. Here's the bug TCP keepalive can't catch.
Two weeks ago, my crypto signal API silently failed for 22 hours. No errors. No exceptions. No crash. The service kept running, logs continued to flow…
How to fix native module errors when switching JavaScript runtimes
The error that ruins your Monday You spent the weekend migrating your build pipeline to a faster JavaScript runtime. Tests passed locally. CI was gree…
Replay AI coding sessions deterministically: the divergence detector for your repo
There is a moment in every AI coding workflow where you wish you could roll the tape back. The agent did something on Tuesday. By Thursday the model h…
Python logging trap: The Log Line That Tells You Nothing
The alert fires at 2am. You ssh in, open the logs, and find this: ERROR myapp: connection pool exhausted One line. The error itself, and nothing else.…
I Built a Chrome Extension to Make JavaScript State Debugging Less Painful
I Built a Chrome Extension to Make JavaScript State Debugging Less Painful I recently published my Chrome extension, Dweav (Data Weave) Trace , on the…
Two days lost to PGRST116: when Supabase RLS hides a successful write
TL;DR. Our Supabase upsert wrote the row. The chained .select().single() returned PGRST116. The wrapper read that as a failed write. The frontend retr…
I found 3 silent revenue-leaking bugs in my SaaS in 45 minutes (and the meta-lesson)
I run a small aviation SaaS ($45 MRR, 3 paying customers, 75% churn). This morning I decided to actually look at my data instead of write more code. I…
I Was About to Rewrite My Chat Router. The Bug Was Two Lines in a Prompt.
TL;DR: A customer asked my AI sales bot "what do you have?" and the bot listed product categories the store doesn't sell. My instinct was to rewrite t…
Why Your Docker Containers Refuse to Die: The PID 1 Problem
You hit docker stop . Nothing happens. You wait ten seconds. Docker eventually sends SIGKILL . The container disappears, but only after a frustrating …
Debugging a Mysterious Docker Issue
I recently encountered a weird issue with my Docker container where it would start, run for a few seconds, and then exit with a non-zero status code. …
War Story: Debugging a Ktor 2.2 Coroutine Leak in Kotlin 2.0 Microservices
At 3:17 AM on a Tuesday in Q3 2024, our production Kotlin 2.0 microservice fleet hit a 92% memory utilization threshold across 140 nodes, traced to a …