package main

import "gitea.dooplex.hu/admin/felhom-controller/internal/quiesce"

// COMPILE-TIME WITNESSES for OPTIONAL interfaces satisfied by a RUNTIME type assertion.
//
// Moved here from a _test.go file (R-88 Part 2) on purpose: a witness in a test fires on `go test`
// and `go vet`, but NOT on `go build` alone. The failure it guards against — a signature change that
// silently breaks an interface nobody checks at compile time — is exactly the kind that gets pushed
// by a build-only step.
//
// THE INCIDENT THIS PREVENTS, which already happened once: when `TieredBackend.DueFor` gained a
// return value during R-88 Part 2, `quiesceBackend` stopped satisfying the interface and the whole
// repo still BUILT AND VETTED CLEAN, because `resolveDueTiers` only ever asserts it at runtime
// (`l.backend.(TieredBackend)`). A failed assertion silently falls back to the untargeted
// single-tier path — so every box would have quietly lost R-82's multi-tier backups, with no error
// anywhere. It was caught by accident, not by the toolchain.
//
// THIS DOES NOT MAKE THE INTERFACE REQUIRED. Optionality is deliberate: it is what lets a new
// controller meet an old agent, and what `resolveDueTiers` degrades through on purpose. The witness
// pins the IMPLEMENTATION, not the CONTRACT.
var _ quiesce.TieredBackend = quiesceBackend{}