Add multi-module release launcher example

docs/roadmap/implementation.md

@@ -661,6 +661,19 @@ agreement. Verify the selected module supplies the tool dependency and publicati
 receives its semantic version/profile. Shell patterns never become arbitrary
 library tag templates. Update example guidance with the implemented format.
 
+**Completed:** Added the multi-module profiles, four-column tab-separated
+mapping, shared POSIX selector, and launcher. The mapping covers root and
+nested integration tags plus a physical `/v2` module layout. The launcher
+copies selected module metadata outside the checkout, builds the ReleaseKit
+version selected by that module, and passes the mapped profile and
+`--expected-module` to publication. Guidance covers per-module dependency
+preparation and sequential releases where a sibling dependency is required.
+Verified selector and ambiguity behavior, unknown selections, paths with
+spaces, the physical-major row, and an isolated local-proxy launcher run that
+proved the selected module's tool version and publication arguments. Also
+passed `sh -n`, `go test ./...`, `go run ./internal/apicheck`, and
+`git diff --check`.
+
 ## Stage 14: Bootstrap and deliver mapped module tags in Woodpecker
 
 **Outcome:** A maintained multi-module workflow uses the same declaration and