Short write‑ups of problems we hit running a real commerce operation and what we changed in the code because of them. No product announcements; just the reasoning.
We log every call an assistant makes to our MCP server — who, which tool, how long, did it fail and why — and put it on a sysadmin dashboard. Two weeks of data found a user whose assistant had made 454 calls with a 100% error rate, and fixed the server's instructions instead of the user.
When the application moved to long‑lived workers, the commercial APM agent we had run for years stopped telling the truth — and on the test runner it stopped the tests. We replaced it with NightOwl, an open‑source telemetry stack for Laravel: an agent on each box, a local buffer that survives outages, and every request, job, query, exception and log line landing as rows in a PostgreSQL database we own, on a server we already pay for, with retention measured in years. The best part arrived by accident — an AI assistant connected straight to that database with read‑only SQL.