test: prove declared package import semantics

docs/test-system-v2.md

@@ -227,6 +227,20 @@ owns individual `@test` functions.
 Separate compilation is the only driver build path; no compatibility mode
 switch remains.
 
+`test/package/package_test.ww` also owns the dual-stage
+`declared_name_identity_and_file_import_scope` observer. It generates temporary
+directory trees proving that canonical import identity, physical directory,
+declared package name, and source-file default qualifier remain distinct;
+imports are file-scoped while dependency edges are the package-wide sorted
+union; command and production/internal/external/generated-main variants retain
+canonical action ownership; vendor expansion changes identity but not the
+declared qualifier; compiler argv contains only direct `.wwi` inputs; and its
+named rejected actions leave neither committed nor staged action artifacts or a
+published binary. Together with the existing directory, recursive, vendor,
+exact-argv, command, and persistent-workdir observers, the package suite proves
+archive-only link argv and exact warm/rejection-state behavior without
+duplicating those broader mechanisms in this observer.
+
 `ww build`, an explicit single-file `ww test -o <stem>`, and each successful
 directory-package `ww test -c` build publish `<stem>.sepwork` as a caller-owned
 artifact directory. The driver acquires it with one fresh `mkdir` and refuses