fix(config): enable Claude 4.6 models by removing feature gates

Claude Sonnet 4.6 and Opus 4.6 were feature-gated, causing them to be
hidden in staging where the feature flags are not enabled. This change
removes the feature gates for both 4.6 models to match the 4.5 models,
making them available by default.

Changes:
- Set featureGated: false for claude-sonnet-4-6 and claude-opus-4-6
- Updated backend tests to reflect the new configuration
- Updated sync_flags tests to expect correct flag counts

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Gkrumbach07

components/backend/cmd/sync_flags_test.go

@@ -72,7 +72,7 @@ func TestFlagsFromManifest_SkipsDefaultUnavailableAndNonGated(t *testing.T) {
 		},
 		Models: []types.ModelEntry{
 			{ID: "claude-sonnet-4-5", Label: "Sonnet 4.5", Provider: "anthropic", Available: true, FeatureGated: false},
-			{ID: "claude-opus-4-6", Label: "Opus 4.6", Provider: "anthropic", Available: true, FeatureGated: true},
+			{ID: "claude-opus-4-6", Label: "Opus 4.6", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "claude-opus-4-1", Label: "Opus 4.1", Provider: "anthropic", Available: false, FeatureGated: true},
 			{ID: "claude-haiku-4-5", Label: "Haiku 4.5", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "gemini-2.5-flash", Label: "Gemini 2.5 Flash", Provider: "google", Available: true, FeatureGated: false},
@@ -84,19 +84,20 @@ func TestFlagsFromManifest_SkipsDefaultUnavailableAndNonGated(t *testing.T) {
 
 	// Should skip: claude-sonnet-4-5 (default + not gated),
 	//              claude-opus-4-1 (unavailable),
+	//              claude-opus-4-6 (not gated),
 	//              claude-haiku-4-5 (not gated),
 	//              gemini-2.5-flash (default + not gated)
-	// Should include: claude-opus-4-6, gemini-2.5-pro
-	if len(flags) != 2 {
-		t.Fatalf("expected 2 flags, got %d: %v", len(flags), flags)
+	// Should include: gemini-2.5-pro
+	if len(flags) != 1 {
+		t.Fatalf("expected 1 flag, got %d: %v", len(flags), flags)
 	}
 
 	names := map[string]bool{}
 	for _, f := range flags {
 		names[f.Name] = true
 	}
-	if !names["model.claude-opus-4-6.enabled"] {
-		t.Error("expected model.claude-opus-4-6.enabled")
+	if names["model.claude-opus-4-6.enabled"] {
+		t.Error("non-gated model should be skipped")
 	}
 	if !names["model.gemini-2.5-pro.enabled"] {
 		t.Error("expected model.gemini-2.5-pro.enabled")
@@ -127,17 +128,17 @@ func TestStaleFlagsFromManifest_ReturnsNonGatedModels(t *testing.T) {
 		DefaultModel: "claude-sonnet-4-5",
 		Models: []types.ModelEntry{
 			{ID: "claude-sonnet-4-5", Provider: "anthropic", Available: true, FeatureGated: false},
-			{ID: "claude-opus-4-6", Provider: "anthropic", Available: true, FeatureGated: true},
+			{ID: "claude-opus-4-6", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "claude-haiku-4-5", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "gemini-2.5-pro", Provider: "google", Available: true, FeatureGated: true},
 		},
 	}
 
 	stale := StaleFlagsFromManifest(manifest)
 
-	// Non-gated models: claude-sonnet-4-5, claude-haiku-4-5
-	if len(stale) != 2 {
-		t.Fatalf("expected 2 stale flags, got %d: %v", len(stale), stale)
+	// Non-gated models: claude-sonnet-4-5, claude-opus-4-6, claude-haiku-4-5
+	if len(stale) != 3 {
+		t.Fatalf("expected 3 stale flags, got %d: %v", len(stale), stale)
 	}
 	names := map[string]bool{}
 	for _, s := range stale {
@@ -146,10 +147,13 @@ func TestStaleFlagsFromManifest_ReturnsNonGatedModels(t *testing.T) {
 	if !names["model.claude-sonnet-4-5.enabled"] {
 		t.Error("expected model.claude-sonnet-4-5.enabled in stale list")
 	}
+	if !names["model.claude-opus-4-6.enabled"] {
+		t.Error("expected model.claude-opus-4-6.enabled in stale list")
+	}
 	if !names["model.claude-haiku-4-5.enabled"] {
 		t.Error("expected model.claude-haiku-4-5.enabled in stale list")
 	}
-	if names["model.claude-opus-4-6.enabled"] {
+	if names["model.gemini-2.5-pro.enabled"] {
 		t.Error("gated model should not be in stale list")
 	}
 }

components/backend/handlers/models_test.go

@@ -44,7 +44,7 @@ var _ = Describe("Models Handler", Label(test_constants.LabelUnit, test_constant
 		},
 		Models: []types.ModelEntry{
 			{ID: "claude-sonnet-4-5", Label: "Claude Sonnet 4.5", VertexID: "claude-sonnet-4-5@20250929", Provider: "anthropic", Available: true, FeatureGated: false},
-			{ID: "claude-opus-4-6", Label: "Claude Opus 4.6", VertexID: "claude-opus-4-6@default", Provider: "anthropic", Available: true, FeatureGated: true},
+			{ID: "claude-opus-4-6", Label: "Claude Opus 4.6", VertexID: "claude-opus-4-6@default", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "claude-opus-4-5", Label: "Claude Opus 4.5", VertexID: "claude-opus-4-5@20251101", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "claude-haiku-4-5", Label: "Claude Haiku 4.5", VertexID: "claude-haiku-4-5@20251001", Provider: "anthropic", Available: true, FeatureGated: false},
 			{ID: "gemini-2.5-flash", Label: "Gemini 2.5 Flash", VertexID: "gemini-2.5-flash", Provider: "google", Available: true, FeatureGated: false},

components/manifests/base/models.json

@@ -20,7 +20,7 @@
       "vertexId": "claude-opus-4-6@default",
       "provider": "anthropic",
       "available": true,
-      "featureGated": true
+      "featureGated": false
     },
     {
       "id": "claude-opus-4-5",
@@ -44,7 +44,7 @@
       "vertexId": "claude-sonnet-4-6@default",
       "provider": "anthropic",
       "available": true,
-      "featureGated": true
+      "featureGated": false
     },
     {
       "id": "gemini-2.5-flash",