The most expensive lie a system can tell is that it accepted work it cannot process in time. It usually
Continue readingBackpressure: What Your System Should Do When Consumers Fall Behind
Every language-level sync.Mutex rests on a guarantee the operating system makes for you: if a thread dies holding the lock,
Authentication has become a solved-enough problem that most teams barely think about it: OIDC, SSO, a middleware that verifies the
Continue readingBroken Access Control: The Vulnerability Class That Hides Behind Working Tests
Every so often a profiler hands you a paradox. Your server is running eight worker goroutines, the load is perfectly
Continue readingFalse Sharing: When Your Parallel Code Is Secretly Serial
The migration that works on staging and melts down production usually dies in the lock queue. Someone runs an ALTER
Continue readingZero-Downtime Schema Migrations: Expand-Contract on PostgreSQL, Step by Step
Ask a language model for JSON and most of the time it complies. Every so often it wraps the object
Continue readingConstrained Decoding: How LLMs Get Forced Into Valid JSON
Every team starts logging with good intentions and ends up with a bill. Somewhere between the first incident and the
Python 3.15 landed on October 9, and for the free-threading effort it is the most consequential release since the whole
Continue readingLife After the GIL: What Python 3.15’s Free-Threading Milestones Actually Change
Ask a chat model to check the weather and it will happily invent a forecast — it has no way
Continue readingFunction Calling: How LLMs Actually Call Your Tools
Every production incident report with a root cause of “the downstream service was slow” is really a story about a
Continue readingTimeouts, Retries, and Circuit Breakers: HTTP Clients That Fail Gracefully in Go