diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index 1d049f5..0d55c14 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -1,6 +1,6 @@
 # Implement PromptKit comparison and catalogs
 
-Status: Stages 1–8 complete; remaining stages are planned.
+Status: Stages 1–9 complete; remaining stages are planned.
 
 ## Scope and authority
 
@@ -531,6 +531,24 @@ Run example tests and the complete ckprompt suite. Existing ordinary scope
 operations, named reports, app comparison, and the domain command must work with
 the upgraded dependency.
 
+**Completion evidence (2026-10-12)**
+
+- Replaced the obsolete negative PromptKit diff test with a public composed-app
+  invocation that compares the before/after fixtures using the spring selector
+  and decodes the native change under the spring profile. Updated the after
+  fixture's spring model to make that comparison meaningful. The application
+  diff test still checks the changed default and now also checks the model value
+  under an explicit spring override.
+- Added composed public invocations for both catalogs with config and campaign
+  selection. Tests decode the YAML and find the configured `briefing` version
+  and selected `autumn` profile without pinning PromptKit's full catalog.
+- Updated the example README with copyable PromptKit diff/catalog commands and
+  described how the selection-aware loader and sample cache behave. Existing
+  ordinary scope operations, named reports, app comparison/cache behavior, and
+  session command coverage remain in place.
+- `GOTOOLCHAIN=local go test -count=1 .` passed in the composed example, and
+  `GOTOOLCHAIN=local go test -count=1 ./...` passed in `integrations/ckprompt`.
+
 ## Stage 10: Reconcile canonical documentation and capability status
 
 **Outcome:** current documentation describes delivered behavior and separates
diff --git a/integrations/ckprompt/examples/composed/README.md b/integrations/ckprompt/examples/composed/README.md
index 71262d3..63767ee 100644
--- a/integrations/ckprompt/examples/composed/README.md
+++ b/integrations/ckprompt/examples/composed/README.md
@@ -1,13 +1,17 @@
 # Composed consumer
 
 This example composes application configuration, PromptKit configuration,
-definition inspection, and one application-owned command:
+PromptKit comparison and catalogs, definition inspection, and one
+application-owned command:
 
 ```sh
 go run . config scopes
 go run . config validate --scope all --campaign spring --limit=0
 go run . config diff --scope app --config fixtures/before.yml --against-config fixtures/after.yml
 go run . config diff --scope app --config fixtures/before.yml --against-config fixtures/after.yml --campaign spring --limit=0
+go run . config diff --scope promptkit --config fixtures/before.yml --against-config fixtures/after.yml --campaign spring
+go run . promptkit list prompts --config fixtures/before.yml --campaign spring
+go run . promptkit list profiles --config fixtures/after.yml --campaign autumn --format yaml
 go run . promptkit show prompt briefing --campaign spring --format yaml
 go run . promptkit show profile spring --campaign spring
 go run . session restore session-42 --campaign spring
@@ -23,11 +27,14 @@ loader functions. See the
 [consumer guide](https://gitea.maximumdirect.net/eric/CommandKit/src/branch/main/docs/consumers/guide.md)
 and the suites' GoDoc for initialization timing and ownership.
 
-The application-scope comparison loads the local `before.yml` and `after.yml`
-fixtures and reports `changes.default_campaign: autumn`. The second invocation
-supplies `spring` to both sides, so the effective defaults compare equal; the
-application input check also requires `--limit=0` when `--campaign` is supplied.
-The example's shared run cache keys successful results by the complete supplied
-configuration/overlay selection and the supplied campaign, including presence.
-The campaign override is applied through ConfigKit before loading. These are
-choices for this example's loader and do not define a CommandKit cache policy.
+The application-scope comparison reports the changed default campaign and the
+updated `campaigns.spring.model`. The PromptKit-scope comparison selects spring
+on both sides and reports the native engine change under the spring profile.
+The application input check requires `--limit=0` when `--campaign` is supplied.
+Catalogs use the same selection-aware loader: the prompt catalog includes
+`briefing` version `1`, and the profile catalog includes the selected `autumn`
+profile. The example's shared run cache keys successful results by the complete
+supplied configuration/overlay selection and the supplied campaign, including
+presence. The campaign override is applied through ConfigKit before loading.
+These are choices for this example's loader and do not define a CommandKit cache
+policy.
diff --git a/integrations/ckprompt/examples/composed/fixtures/after.yml b/integrations/ckprompt/examples/composed/fixtures/after.yml
index 456b35c..e4cec20 100644
--- a/integrations/ckprompt/examples/composed/fixtures/after.yml
+++ b/integrations/ckprompt/examples/composed/fixtures/after.yml
@@ -4,7 +4,7 @@ campaigns:
     prompt_id: briefing
     prompt_version: "1"
     profile_id: spring
-    model: spring-model
+    model: spring-model-after
   autumn:
     prompt_id: briefing
     prompt_version: "1"
diff --git a/integrations/ckprompt/examples/composed/main_test.go b/integrations/ckprompt/examples/composed/main_test.go
index f2417da..85e316e 100644
--- a/integrations/ckprompt/examples/composed/main_test.go
+++ b/integrations/ckprompt/examples/composed/main_test.go
@@ -34,10 +34,9 @@ func TestComposedApplicationDiffUsesFixturesAndCampaignOverride(t *testing.T) {
 	if outcome.Kind != commandkit.OutcomeSuccess {
 		t.Fatalf("overridden fixture diff outcome = %#v", outcome)
 	}
-	for _, category := range []string{"additions", "changes", "deletions"} {
-		if node := composedReportValue(t, output.Bytes(), category); len(node.Content) != 0 {
-			t.Fatalf("campaign override left %s: %q", category, output.String())
-		}
+	value = composedReportValue(t, output.Bytes(), "changes", "campaigns", "spring", "model")
+	if value == nil || value.Value != "spring-model-after" {
+		t.Fatalf("campaign override spring model = %#v; report %q", value, output.String())
 	}
 }
 
@@ -118,15 +117,59 @@ func TestComposedPromptKitAndDomainCommandsRemainAvailable(t *testing.T) {
 	}
 }
 
-func TestPromptKitScopeDoesNotSupportConfigurationDiff(t *testing.T) {
+func TestPromptKitScopeDiffAndCatalogsUseSelectedCampaign(t *testing.T) {
 	app, err := newApp()
 	if err != nil {
 		t.Fatal(err)
 	}
 	var output bytes.Buffer
-	outcome := app.Execute(context.Background(), []string{"config", "diff", "--scope", "promptkit"}, commandkit.Streams{Out: &output, Err: io.Discard})
-	if outcome.Kind != commandkit.OutcomeUsage || output.Len() != 0 {
-		t.Fatalf("PromptKit diff outcome/output = %#v / %q", outcome, output.String())
+	outcome := app.Execute(context.Background(), []string{"config", "diff", "--scope", "promptkit", "--config", "fixtures/before.yml", "--against-config", "fixtures/after.yml", "--campaign", "spring"}, commandkit.Streams{Out: &output, Err: io.Discard})
+	if outcome.Kind != commandkit.OutcomeSuccess {
+		t.Fatalf("PromptKit diff outcome = %#v", outcome)
+	}
+	value := composedReportValue(t, output.Bytes(), "changes", "profiles", "spring", "model")
+	if value == nil || value.Value != "spring-model-after" {
+		t.Fatalf("PromptKit diff spring model = %#v; report %q", value, output.String())
+	}
+
+	output.Reset()
+	outcome = app.Execute(context.Background(), []string{"promptkit", "list", "prompts", "--config", "fixtures/before.yml", "--campaign", "spring"}, commandkit.Streams{Out: &output, Err: io.Discard})
+	if outcome.Kind != commandkit.OutcomeSuccess {
+		t.Fatalf("prompt catalog outcome = %#v", outcome)
+	}
+	var prompts []map[string]any
+	if err := yaml.Unmarshal(output.Bytes(), &prompts); err != nil {
+		t.Fatalf("decode prompt catalog %q: %v", output.String(), err)
+	}
+	foundPrompt := false
+	for _, prompt := range prompts {
+		if prompt["id"] == "briefing" && prompt["version"] == "1" {
+			foundPrompt = true
+			break
+		}
+	}
+	if !foundPrompt {
+		t.Fatalf("selected prompt identity missing from catalog: %#v", prompts)
+	}
+
+	output.Reset()
+	outcome = app.Execute(context.Background(), []string{"promptkit", "list", "profiles", "--config", "fixtures/after.yml", "--campaign", "autumn", "--format", "yaml"}, commandkit.Streams{Out: &output, Err: io.Discard})
+	if outcome.Kind != commandkit.OutcomeSuccess {
+		t.Fatalf("profile catalog outcome = %#v", outcome)
+	}
+	var profiles []string
+	if err := yaml.Unmarshal(output.Bytes(), &profiles); err != nil {
+		t.Fatalf("decode profile catalog %q: %v", output.String(), err)
+	}
+	foundProfile := false
+	for _, profile := range profiles {
+		if profile == "autumn" {
+			foundProfile = true
+			break
+		}
+	}
+	if !foundProfile {
+		t.Fatalf("selected profile missing from catalog: %#v", profiles)
 	}
 }