2 files changed, 38 insertions, 8 deletions
diff --git a/internal/runtimeconfig/store.go b/internal/runtimeconfig/store.go
index 3112951..4ee7ada 100644
--- a/internal/runtimeconfig/store.go
+++ b/internal/runtimeconfig/store.go
@@ -129,6 +129,14 @@ func flattenAppConfig(cfg appconfig.App) map[string]string {
 			switch field.Name {
 			case "StatsWindowMinutes":
 				key = "stats_window_minutes"
+			case "CompletionConfigs":
+				key = "completion_configs"
+			case "CodeActionConfigs":
+				key = "code_action_configs"
+			case "ChatConfigs":
+				key = "chat_configs"
+			case "CLIConfigs":
+				key = "cli_configs"
 			default:
 				continue
 			}
@@ -170,6 +178,22 @@ func stringifyValue(v reflect.Value) string {
 			}
 			return strings.Join(parts, ",")
 		}
+		if v.Type().Elem() == reflect.TypeOf(appconfig.SurfaceConfig{}) {
+			parts := make([]string, 0, v.Len())
+			for i := 0; i < v.Len(); i++ {
+				entry := v.Index(i).Interface().(appconfig.SurfaceConfig)
+				segment := strings.TrimSpace(entry.Provider)
+				if segment != "" {
+					segment += ":"
+				}
+				segment += strings.TrimSpace(entry.Model)
+				if entry.Temperature != nil {
+					segment += fmt.Sprintf("@%.3f", *entry.Temperature)
+				}
+				parts = append(parts, segment)
+			}
+			return strings.Join(parts, "|")
+		}
 		return fmt.Sprint(v.Interface())
 	case reflect.Ptr:
 		if v.IsNil() {
diff --git a/internal/runtimeconfig/store_test.go b/internal/runtimeconfig/store_test.go
index 6d23b33..1c05cc9 100644
--- a/internal/runtimeconfig/store_test.go
+++ b/internal/runtimeconfig/store_test.go
@@ -96,16 +96,22 @@ func TestStoreReloadLogsSummary(t *testing.T) {
 }
 
 func TestDiff_SurfaceModel(t *testing.T) {
-	oldCfg := appconfig.App{CompletionModel: "gpt-4o", CompletionProvider: "openai"}
-	newCfg := appconfig.App{CompletionModel: "gpt-4.1", CompletionProvider: "copilot"}
+	oldCfg := appconfig.App{CompletionConfigs: []appconfig.SurfaceConfig{{Provider: "openai", Model: "gpt-4o"}}}
+	newCfg := appconfig.App{CompletionConfigs: []appconfig.SurfaceConfig{{Provider: "copilot", Model: "gpt-4.1"}}}
 	changes := Diff(oldCfg, newCfg)
-	if len(changes) != 2 {
-		t.Fatalf("expected single change, got %+v", changes)
+	if len(changes) == 0 {
+		t.Fatalf("expected diff entries, got none")
 	}
-	if changes[0].Key != "completion_model" || changes[0].Old != "gpt-4o" || changes[0].New != "gpt-4.1" {
-		t.Fatalf("unexpected diff entry: %+v", changes[0])
+	found := false
+	for _, ch := range changes {
+		if ch.Key == "completion_configs" {
+			if !strings.Contains(ch.Old, "gpt-4o") || !strings.Contains(ch.New, "gpt-4.1") {
+				t.Fatalf("unexpected diff contents: %+v", ch)
+			}
+			found = true
+		}
 	}
-	if changes[1].Key != "completion_provider" || changes[1].Old != "openai" || changes[1].New != "copilot" {
-		t.Fatalf("unexpected provider diff: %+v", changes[1])
+	if !found {
+		t.Fatalf("expected completion configs diff, got %+v", changes)
 	}
 }