Episode 2 of our Rozz shorts is about a bug that comes back. Customers got three payment emails for one invoice. Rozz opens the Incidents dashboard, then the incident note, and works through it: symptom, root cause, fix, prevention.

The note on Rozz's screen is a real one from Dev Second Brain, the Obsidian vault template for developers. It's one of the example incident notes that comes with it: "Duplicate payment emails after deploy". A new step made a webhook handler slower than the provider's timeout. The provider retried, the handler wasn't idempotent, and each retry sent another email.

The Incident template has the same four parts the episode walks through:

Symptom : what users, alerts or logs actually showed, with room to paste the log lines

Root cause : the real cause, not just what set it off.…