Extend discovery coverage across consumer workflows

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Configuration Discovery Implementation Plan
 
-Status: in progress. Stages 1, 2, 3, 4, 5, 6, and 7 are complete.
+Status: in progress. Stages 1, 2, 3, 4, 5, 6, 7, and 8 are complete.
 
 Implement the target behavior in [the discovery roadmap](discovery.md). That
 document owns the selected conventions and OD-1 through OD-5; this plan owns the
@@ -380,7 +380,7 @@ Acceptance: consumers can use the feature entirely through the root package.
 Run focused facade discovery/context tests, public/dependency boundary tests,
 and the everyday check. Mark and commit.
 
-## Stage 8 — Complete Cross-Feature Coverage And Consumer Examples
+## Stage 8 — Complete Cross-Feature Coverage And Consumer Examples (Complete)
 
 1. Add a small maintained consumer example/test for a simple explicitly selected
    preset with test-controlled directories, and another for custom-first search