Verify catalog capability lifecycles

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Dependency upgrades, discovery, and smoke testing implementation plan
 
-Status: Stages 1–7 complete; Stage 8 is next.
+Status: Stages 1–8 complete; Stage 9 is next.
 
 ## Authority and baseline
 
@@ -455,6 +455,15 @@ establish native namespace algorithms.
 **Complete when:** discovery exposes only declared capabilities and preserves
 the selected CommandKit invocation contracts.
 
+**Completed:** 2026-10-17. Added independent installation and eager-capture
+coverage for backend, namespace, and collection callbacks, including help
+without provider acquisition and unavailable filters. Extended nil-loader issue
+retention checks to all catalogs. Existing prompt/profile coverage plus the new
+cases exercise default, named, unqualified, all, explicit-false, conflicting,
+singleton, and repeatable-kind requests; selection, selector, state, inventory,
+empty output, and delivery behavior remain protected. The full ckprompt suite
+passed.
+
 ## Stage 9: Add the optional smoke capability and native adapter
 
 **Primary files:** ckprompt `Suite`, new `smoke.go` or equivalent, adapter tests.