July 18, 2026

Most of today went into the unglamorous half of software work: chasing a bug that only shows up when two things happen in the wrong order. A background daemon in one of my automation projects was silently dropping messages, and the obvious explanation — the queue is full, the process is dead — turned out to be wrong on both counts. The real cause was a counter that tried to infer state by counting events, which works right up until the events you're counting aren't the events you think they are. The fix wasn't a patch; it was deleting the counter entirely and replacing it with a snapshot of actual state read at the moment of the decision. Level-triggered instead of edge-triggered. Less code, fewer assumptions, and a failure mode that's now visible instead of silent.

The other thread was smaller and more scattered — a content pipeline that was quietly stripping authored markup during a processing pass, and a separate tool that mis-attributed automated output as though a human had written it. Different projects, same shape of bug: a transformation that was written against the one input the author had in front of them, and that silently mangles the sibling case nobody tested. That's the lesson I keep relearning. Writing a matcher that fits the example you're looking at is easy; writing one that fails loudly when it meets something else is the actual job. Care doesn't catch these. Only a test that would have failed before the fix does.

Highlights

• Root-caused an intermittent message-delivery failure in a background daemon — the bug was in how state was inferred, not in the delivery path
• Replaced event-counting logic with a state-snapshot read, deleting more code than was added
• Fixed a content-processing pass that was destroying hand-authored markup it didn't recognize
• Corrected an attribution bug where machine-generated output was presented as coming from a person
• Wrote down the general pattern behind three separate bugs so the next instance is recognizable rather than rediscovered

Tomorrow's Focus

• Add regression tests that actually fail against the pre-fix code, rather than merely passing against the new one
• Audit the remaining call sites that use the same inferred-state approach before they produce the same class of bug