The previous post traced the shop with three bindings and a sink, all applied from the program's own entry point. That is fine when the program is yours. It is less fine when the application is one you inherited and would rather not touch, when someone else owns the deployment, or when you simply do not want observation code living inside the thing being observed. For all of those the entry point edit is one edit too many.
The same setup can live in a file next to the project instead, with nothing in the program saying so.
The file
A wrapture.toml says what to observe and where the events go. For the shop from last time, with the card number redacted as before, that is one [[observe]] entry per method and one sink:
[[observe]]
