Install shared reporting flags

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Invocation reporting implementation plan
 
-Status: ready for implementation. No implementation stages are complete.
+Status: Stages 1–5 complete. Stage 6 is next.
 
 ## Objective and authority
 
@@ -204,7 +204,7 @@ reporter/deferred/output handles. Include failures during terminal delivery.
 
 ## Stage 5: Install shared reporting flag metadata
 
-Status: pending.
+Status: complete.
 
 Primary files: [command.go](../../command.go),
 [parser.go](../../parser.go), [flag_aliases.go](../../flag_aliases.go),
@@ -231,6 +231,10 @@ Validation: protect installation collisions and atomicity, aliases to each core
 flag, canonical-spelling collisions, unchanged typed binding indexes, and flag
 availability in root/group/built-in/discovery help.
 
+Focused metadata and Cobra adapter tests pass. Root-package registration and
+alias tests are included, but their execution is deferred until the planned API
+migration restores root-package buildability.
+
 ## Stage 6: Preserve occurrence order through the normal parser
 
 Status: pending.