What is Dependency Inversion?
High-level logic should not depend on low-level details. Both should depend on abstractions.
both depend on the gateway
Dependency inversion pushes both sides toward…
Write it in your own words in the app.
In real work
Dependency inversion: checkout depends on PaymentGateway protocol, not one vendor SDK.
In the illustration
At t=0 a hard cable runs straight from checkout down into the vendor box; the cable is cut, checkout plugs into the plate from above and the vendor plugs in from below, so both point at the plate.
Apply dependency inversion to the report generator in your coding agent: it should depend on a DataSource abstraction, with the Postgres and CSV implementations injected at startup.
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