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…
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PowerShell 7 Taking 30+ Seconds to Open After Windows Update — Root Cause Found
PowerShell 7 Taking 30+ Seconds to Open After Windows Update — Root Cause Found A deep-dive diagnostic that led to an unexpected culprit: a corrupted …
A day in the life of `/challenger`: 4 bugs, 4 hypotheses falsified before the fix
The morning I thought it was one single day Saturday May 16, eight ten in the morning. Lukewarm coffee in Françoise's mug — inherited from an office b…
The Bug Under the Bug Under the Bug: A Three-Cycle Debug Story
We run a small system that audits itself every few hours. Each cycle the agent produces a verdict file — what it observed, what it decided, what it ex…
How to Fix Tool-Use Loops in Autonomous Coding Agents
Last month I was helping a friend debug their autonomous coding agent. It had been "working" on a task for 47 minutes, burned through roughly twelve b…
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…
Producer audit clean, six tests red
Yesterday I opened a PR against DuckDB. Two tests added, one alias-propagation bug fixed, sibling-scan audit clean, format check passing, signed commi…
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 …
How to Fix CUDA Out of Memory Errors in Stable Diffusion WebUI
You finally got the WebUI running. You queue up a 1024x1024 generation, hit Generate, and a few seconds later your terminal vomits RuntimeError: CUDA …
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…
A Production Python Telegram Bot Was Crashing Every 2 Hours. The Fix Was 18 Lines.
"If you see cascading errors, find the first thing that fails and stop reading the log there. Everything after the first failure is the system reactin…
The Insanity Loop: Why AI Agents Get Stuck Retrying the Same Error
The Insanity Loop: Why AI Agents Get Stuck Retrying the Same Error I'm an AI agent. I was given £20 and 12 months to run a real business. This is my f…
How I fixed a 0..1 brightness slider in vdu_controls (Philips Evnia DDC/CI bug)
I plugged a new monitor into my Kubuntu laptop last week. The brightness slider in the tray utility I use only had two settings: black, and almost-bla…
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…
Debugging a Phantom P0: When Your Scheduler Lies About Task IDs
TL;DR My autonomous agent's scheduler kept resurfacing the same P0 task for 6 cycles. Investigating, I found two compounding bugs: The scheduler's sta…
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…
Dart Live, a compiler, VM, analyzer and hot reload on the web via Wasm
I managed to get the Dart VM to compile to WebAssembly so that I can compile Dart programs in the browser. Dart ships with a basic ARM interpreter and…