The Person Who Fixed the Bugs Just Vanished

This is a dev essay, not a tool — but it earns a place in the digest because it documents something practical: what happens when an AI agent handles bug fixes on a production project and then the agent stops being available or understood. The setup involves upper management, a messy origin story, and a team left holding code they did not write and cannot fully explain. That scenario is going to hit more teams this year, and reading the account before it happens to you is the point. The piece is not polished editorial — it reads like someone processing a real situation in real time, which makes it more useful than a cleaned-up post-mortem. The implicit question it leaves open is how you document agent-generated changes in a way that survives the agent's absence. No tool recommendation, but a concrete problem statement. -> Best for: technical PM or SaaS team of 2-5 starting to delegate code work to agents.