Fix feature gate filename parsing for major version segmentation

pkg/dataloader/featuregateloader/featuregateloader.go

@@ -175,13 +175,15 @@ func processFeatureGateFile(path, release, filename string) ([]models.FeatureGat
 	return convertAPIToDB(fg, release, topology, featureSet, path), nil
 }
 
-// parseFeatureGateFilename extracts topology and feature set from the filename
+// parseFeatureGateFilename extracts topology and feature set from the filename.
+// Handles both old format (featureGate-{topology}-{featureSet}.yaml) and
+// new versioned format (featureGate-{majorStart}-{majorEnd}-{topology}-{featureSet}.yaml).
 func parseFeatureGateFilename(filename string) (string, string, bool) {
 	parts := strings.Split(strings.TrimSuffix(filename, ".yaml"), "-")
 	if len(parts) < 3 {
 		return "", "", false
 	}
-	return parts[1], parts[2], true
+	return parts[len(parts)-2], parts[len(parts)-1], true
 }
 
 // convertAPIToDB converts the parsed feature gate data into db models

pkg/dataloader/featuregateloader/featuregateloader_test.go

@@ -0,0 +1,79 @@
+package featuregateloader
+
+import (
+	"testing"
+)
+
+func TestParseFeatureGateFilename(t *testing.T) {
+	tests := []struct {
+		name        string
+		filename    string
+		wantTopo    string
+		wantFeatSet string
+		wantValid   bool
+	}{
+		{
+			name:        "old format Hypershift Default",
+			filename:    "featureGate-Hypershift-Default.yaml",
+			wantTopo:    "Hypershift",
+			wantFeatSet: "Default",
+			wantValid:   true,
+		},
+		{
+			name:        "old format SelfManagedHA TechPreviewNoUpgrade",
+			filename:    "featureGate-SelfManagedHA-TechPreviewNoUpgrade.yaml",
+			wantTopo:    "SelfManagedHA",
+			wantFeatSet: "TechPreviewNoUpgrade",
+			wantValid:   true,
+		},
+		{
+			name:        "versioned format Hypershift Default",
+			filename:    "featureGate-4-10-Hypershift-Default.yaml",
+			wantTopo:    "Hypershift",
+			wantFeatSet: "Default",
+			wantValid:   true,
+		},
+		{
+			name:        "versioned format SelfManagedHA DevPreviewNoUpgrade",
+			filename:    "featureGate-4-10-SelfManagedHA-DevPreviewNoUpgrade.yaml",
+			wantTopo:    "SelfManagedHA",
+			wantFeatSet: "DevPreviewNoUpgrade",
+			wantValid:   true,
+		},
+		{
+			name:        "versioned format Hypershift OKD",
+			filename:    "featureGate-4-10-Hypershift-OKD.yaml",
+			wantTopo:    "Hypershift",
+			wantFeatSet: "OKD",
+			wantValid:   true,
+		},
+		{
+			name:      "too few parts",
+			filename:  "featureGate-Default.yaml",
+			wantValid: false,
+		},
+		{
+			name:      "just prefix",
+			filename:  "featureGate.yaml",
+			wantValid: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotTopo, gotFeatSet, gotValid := parseFeatureGateFilename(tt.filename)
+			if gotValid != tt.wantValid {
+				t.Fatalf("valid = %v, want %v", gotValid, tt.wantValid)
+			}
+			if !gotValid {
+				return
+			}
+			if gotTopo != tt.wantTopo {
+				t.Errorf("topology = %q, want %q", gotTopo, tt.wantTopo)
+			}
+			if gotFeatSet != tt.wantFeatSet {
+				t.Errorf("featureSet = %q, want %q", gotFeatSet, tt.wantFeatSet)
+			}
+		})
+	}
+}