Migrate Files surfaces to interface patterns

README.md

@@ -148,6 +148,9 @@ Connector and collaboration ownership boundaries are documented in
 `docs/CONNECTOR_BOUNDARY.md` and `docs/DOCUMENT_COLLABORATION_BOUNDARY.md`.
 The role-adaptive user, administration, integration, and operator guide is the
 [Files handbook](docs/FILES_HANDBOOK.md).
+The Files route, connector surfaces, consequence classes, and pattern-language
+verification are recorded in
+[Files interface pattern migration](docs/INTERFACE_PATTERN_MIGRATION.md).
 
 Archive imports use a two-phase preview and confirmation flow for ZIP, TAR,
 TAR.GZ, TAR.BZ2, and TAR.XZ. Requests are spooled to bounded temporary files;