devgeist — blog

Why agents holding cloud credentials undo a decade of infrastructure-as-code — and a design that keeps agent speed while putting a policy-checked gate between intent and effect.

Exploring Kubernetes HPA through control theory: dead time, windup, offset — and why HPA's math is smarter than it looks.

The operational cost of maintaining message ordering in Kafka with distributed locks — and when simpler alternatives are the better choice.

Implementation gaps in Kafka's ordered retry pattern: the per-key locking edge cases and production bugs the whiteboard diagrams don't show.

Retry topics keep throughput high but break ordering.

A production debugging story: how an empty MySQL table took 20 seconds to query, and what InnoDB's history list taught me about MVCC and purge operations.

Master graceful shutdown in Go beyond ctx.Done().

Stop getting false alerts from Kafka consumers.

Real-world API simulation challenges beyond the basics: dynamic data, stateful interactions, and the edge cases that break naive record-and-replay setups.

Why mock when you can simulate?