Detector::Elixir::Phoenix

Phoenix routers rarely write use Phoenix.Router directly; the generated convention is use MyAppWeb, :router, where the :router clause of the app's *_web.ex macro injects Phoenix.Router. Match that use _, :router shape so real routers register even when the literal Phoenix.Router never appears in the file.

Cheap filename-only filter the detector pass uses to skip detect on files the detector cannot possibly match. The default true preserves prior behavior (every detector runs on every file). Override with the same predicate the body of detect starts with — e.g., filename.ends_with?(".py") for a Python framework detector — so the detector loop avoids the detect dispatch on files outside the detector's language.

On large codebases (saleor's 4255 .py files) this lifts ~100 virtual detect calls per file out of the hot loop because most detectors' inner first-line is exactly this kind of cheap filename check.

The tech name; detector_for overrides it. Empty on the bare base.