Writing

Notes from shipping
production code

Short writeups on bugs I've fixed in open-source projects, patterns I've learned building AI-powered systems at work, and the kind of subtle software behaviour that's only visible from the trenches.

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Releasing May 16, 2026

BullMQ was crashing on getRanges() because Python's list.reverse() returns None

A 1-line fix in BullMQ's Python port that taught me the universal lesson about Python's mutating-vs-returning method conventions. .reverse(), .sort(), .append() — they all mutate in place and return None.

bullmq python debugging open-source
6 min read

The bug where VS Code's Debug Console was pasting 'repl:1' into my clipboard

A 2-line CSS fix in VS Code that taught me how user-select: text cascades through every descendant — even the decorative ones. The fix for my own misread of the bug: stop looking at JavaScript, start looking at the cascade.

vscode css debugging open-source