Extend native catalog adapters

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Dependency upgrades, discovery, and smoke testing implementation plan
 
-Status: Stages 1–5 complete; Stage 6 is next.
+Status: Stages 1–6 complete; Stage 7 is next.
 
 ## Authority and baseline
 
@@ -381,6 +381,15 @@ operator syntax delivered in Stage 7.
 **Complete when:** all five catalogs are available through narrow native adapters
 and public callback shapes are coherent.
 
+**Completed:** 2026-10-17. Added `CatalogRequest` and `NamespaceRequest`,
+updated the prompt/profile callbacks, and exposed backend, namespace, and
+collection callbacks. `FromEngine` forwards selections and native filters or
+kinds to all five PromptKit catalog methods, preserving returned values,
+diagnostics, and errors. Existing catalog callers now send the default request.
+Focused adapter tests compare each callback with its native method and cover
+invocation values, loader diagnostics/error identity, and cancellation. The
+focused adapter/catalog tests and `GOTOOLCHAIN=local go build ./...` passed.
+
 ## Stage 7: Add catalog command bindings and YAML output
 
 **Primary files:** ckprompt catalog command construction, input preparation,