From 9da2433a7c470976fccf7fdb1e12379f11ab49ce Mon Sep 17 00:00:00 2001
From: LordMathis <matus@namesny.com>
Date: Sun, 19 Oct 2025 18:07:14 +0200
Subject: [PATCH] Refactor instance and manager tests to use BackendOptions
 structure

---
 pkg/instance/instance_test.go     | 209 ++++++++++++++++++------------
 pkg/manager/manager_test.go       |  36 +++--
 pkg/manager/operations_test.go    |  68 ++++++----
 pkg/manager/timeout_test.go       |  56 ++++----
 pkg/server/handlers_backends.go   |  20 ++-
 pkg/validation/validation_test.go |  39 +++---
 6 files changed, 251 insertions(+), 177 deletions(-)

diff --git a/pkg/instance/instance_test.go b/pkg/instance/instance_test.go
index 7c88741..872b8c1 100644
--- a/pkg/instance/instance_test.go
+++ b/pkg/instance/instance_test.go
@@ -34,10 +34,12 @@ func TestNewInstance(t *testing.T) {
 	}
 
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -55,8 +57,8 @@ func TestNewInstance(t *testing.T) {
 
 	// Check that options were properly set with defaults applied
 	opts := inst.GetOptions()
-	if opts.LlamaServerOptions.Model != "/path/to/model.gguf" {
-		t.Errorf("Expected model '/path/to/model.gguf', got %q", opts.LlamaServerOptions.Model)
+	if opts.BackendOptions.LlamaServerOptions.Model != "/path/to/model.gguf" {
+		t.Errorf("Expected model '/path/to/model.gguf', got %q", opts.BackendOptions.LlamaServerOptions.Model)
 	}
 	if inst.GetPort() != 8080 {
 		t.Errorf("Expected port 8080, got %d", inst.GetPort())
@@ -106,9 +108,11 @@ func TestNewInstance_WithRestartOptions(t *testing.T) {
 		AutoRestart:  &autoRestart,
 		MaxRestarts:  &maxRestarts,
 		RestartDelay: &restartDelay,
-		BackendType:  backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -154,10 +158,12 @@ func TestSetOptions(t *testing.T) {
 	}
 
 	initialOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -168,18 +174,20 @@ func TestSetOptions(t *testing.T) {
 
 	// Update options
 	newOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/new-model.gguf",
-			Port:  8081,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/new-model.gguf",
+				Port:  8081,
+			},
 		},
 	}
 
 	inst.SetOptions(newOptions)
 	opts := inst.GetOptions()
 
-	if opts.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
-		t.Errorf("Expected updated model '/path/to/new-model.gguf', got %q", opts.LlamaServerOptions.Model)
+	if opts.BackendOptions.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
+		t.Errorf("Expected updated model '/path/to/new-model.gguf', got %q", opts.BackendOptions.LlamaServerOptions.Model)
 	}
 	if inst.GetPort() != 8081 {
 		t.Errorf("Expected updated port 8081, got %d", inst.GetPort())
@@ -208,11 +216,13 @@ func TestSetOptions_PreservesNodes(t *testing.T) {
 
 	// Create instance with initial nodes
 	initialOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		Nodes:       map[string]struct{}{"worker1": {}},
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		Nodes: map[string]struct{}{"worker1": {}},
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -221,11 +231,13 @@ func TestSetOptions_PreservesNodes(t *testing.T) {
 
 	// Try to update with different nodes
 	updatedOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		Nodes:       map[string]struct{}{"worker2": {}}, // Attempt to change node
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/new-model.gguf",
-			Port:  8081,
+		Nodes: map[string]struct{}{"worker2": {}}, // Attempt to change node
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/new-model.gguf",
+				Port:  8081,
+			},
 		},
 	}
 
@@ -238,8 +250,8 @@ func TestSetOptions_PreservesNodes(t *testing.T) {
 	}
 
 	// Other options should be updated
-	if opts.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
-		t.Errorf("Expected updated model '/path/to/new-model.gguf', got %q", opts.LlamaServerOptions.Model)
+	if opts.BackendOptions.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
+		t.Errorf("Expected updated model '/path/to/new-model.gguf', got %q", opts.BackendOptions.LlamaServerOptions.Model)
 	}
 }
 
@@ -264,10 +276,12 @@ func TestGetProxy(t *testing.T) {
 	}
 
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Host: "localhost",
-			Port: 8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Host: "localhost",
+				Port: 8080,
+			},
 		},
 	}
 
@@ -319,10 +333,12 @@ func TestMarshalJSON(t *testing.T) {
 	}
 
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -336,6 +352,9 @@ func TestMarshalJSON(t *testing.T) {
 		t.Fatalf("JSON marshal failed: %v", err)
 	}
 
+	// Debug: Print the JSON to see what we're getting
+	t.Logf("Marshaled JSON: %s", string(data))
+
 	// Check that JSON contains expected fields
 	var result map[string]any
 	err = json.Unmarshal(data, &result)
@@ -414,14 +433,14 @@ func TestUnmarshalJSON(t *testing.T) {
 	if opts == nil {
 		t.Fatal("Expected options to be set")
 	}
-	if opts.BackendType != backends.BackendTypeLlamaCpp {
-		t.Errorf("Expected backend_type '%s', got %s", backends.BackendTypeLlamaCpp, opts.BackendType)
+	if opts.BackendOptions.BackendType != backends.BackendTypeLlamaCpp {
+		t.Errorf("Expected backend_type '%s', got %s", backends.BackendTypeLlamaCpp, opts.BackendOptions.BackendType)
 	}
-	if opts.LlamaServerOptions == nil {
+	if opts.BackendOptions.LlamaServerOptions == nil {
 		t.Fatal("Expected LlamaServerOptions to be set")
 	}
-	if opts.LlamaServerOptions.Model != "/path/to/model.gguf" {
-		t.Errorf("Expected model '/path/to/model.gguf', got %q", opts.LlamaServerOptions.Model)
+	if opts.BackendOptions.LlamaServerOptions.Model != "/path/to/model.gguf" {
+		t.Errorf("Expected model '/path/to/model.gguf', got %q", opts.BackendOptions.LlamaServerOptions.Model)
 	}
 	if inst.GetPort() != 8080 {
 		t.Errorf("Expected port 8080, got %d", inst.GetPort())
@@ -489,9 +508,11 @@ func TestCreateOptionsValidation(t *testing.T) {
 			options := &instance.Options{
 				MaxRestarts:  tt.maxRestarts,
 				RestartDelay: tt.restartDelay,
-				BackendType:  backends.BackendTypeLlamaCpp,
-				LlamaServerOptions: &backends.LlamaServerOptions{
-					Model: "/path/to/model.gguf",
+				BackendOptions: backends.Options{
+					BackendType: backends.BackendTypeLlamaCpp,
+					LlamaServerOptions: &backends.LlamaServerOptions{
+						Model: "/path/to/model.gguf",
+					},
 				},
 			}
 
@@ -522,9 +543,11 @@ func TestStatusChangeCallback(t *testing.T) {
 	}
 	globalSettings := &config.InstancesConfig{LogsDir: "/tmp/test"}
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -587,10 +610,12 @@ func TestSetOptions_NodesPreserved(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			options := &instance.Options{
-				BackendType: backends.BackendTypeLlamaCpp,
-				Nodes:       tt.initialNodes,
-				LlamaServerOptions: &backends.LlamaServerOptions{
-					Model: "/path/to/model.gguf",
+				Nodes: tt.initialNodes,
+				BackendOptions: backends.Options{
+					BackendType: backends.BackendTypeLlamaCpp,
+					LlamaServerOptions: &backends.LlamaServerOptions{
+						Model: "/path/to/model.gguf",
+					},
 				},
 			}
 
@@ -598,10 +623,12 @@ func TestSetOptions_NodesPreserved(t *testing.T) {
 
 			// Attempt to update nodes (should be ignored)
 			updateOptions := &instance.Options{
-				BackendType: backends.BackendTypeLlamaCpp,
-				Nodes:       tt.updateNodes,
-				LlamaServerOptions: &backends.LlamaServerOptions{
-					Model: "/path/to/new-model.gguf",
+				Nodes: tt.updateNodes,
+				BackendOptions: backends.Options{
+					BackendType: backends.BackendTypeLlamaCpp,
+					LlamaServerOptions: &backends.LlamaServerOptions{
+						Model: "/path/to/new-model.gguf",
+					},
 				},
 			}
 			inst.SetOptions(updateOptions)
@@ -619,8 +646,8 @@ func TestSetOptions_NodesPreserved(t *testing.T) {
 			}
 
 			// Verify other options were updated
-			if opts.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
-				t.Errorf("Expected model to be updated to '/path/to/new-model.gguf', got %q", opts.LlamaServerOptions.Model)
+			if opts.BackendOptions.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
+				t.Errorf("Expected model to be updated to '/path/to/new-model.gguf', got %q", opts.BackendOptions.LlamaServerOptions.Model)
 			}
 		})
 	}
@@ -632,9 +659,11 @@ func TestProcessErrorCases(t *testing.T) {
 	}
 	globalSettings := &config.InstancesConfig{LogsDir: "/tmp/test"}
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -662,10 +691,12 @@ func TestRemoteInstanceOperations(t *testing.T) {
 	}
 	globalSettings := &config.InstancesConfig{LogsDir: "/tmp/test"}
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		Nodes:       map[string]struct{}{"remote-node": {}}, // Remote instance
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		Nodes: map[string]struct{}{"remote-node": {}}, // Remote instance
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -707,10 +738,12 @@ func TestProxyClearOnOptionsChange(t *testing.T) {
 	}
 	globalSettings := &config.InstancesConfig{LogsDir: "/tmp/test"}
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Host: "localhost",
-			Port: 8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Host: "localhost",
+				Port: 8080,
+			},
 		},
 	}
 
@@ -724,10 +757,12 @@ func TestProxyClearOnOptionsChange(t *testing.T) {
 
 	// Update options (should clear proxy)
 	newOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Host: "localhost",
-			Port: 8081, // Different port
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Host: "localhost",
+				Port: 8081, // Different port
+			},
 		},
 	}
 	inst.SetOptions(newOptions)
@@ -753,10 +788,12 @@ func TestIdleTimeout(t *testing.T) {
 	t.Run("not running never times out", func(t *testing.T) {
 		timeout := 1
 		inst := instance.New("test", backendConfig, globalSettings, &instance.Options{
-			BackendType: backends.BackendTypeLlamaCpp,
 			IdleTimeout: &timeout,
-			LlamaServerOptions: &backends.LlamaServerOptions{
-				Model: "/path/to/model.gguf",
+			BackendOptions: backends.Options{
+				BackendType: backends.BackendTypeLlamaCpp,
+				LlamaServerOptions: &backends.LlamaServerOptions{
+					Model: "/path/to/model.gguf",
+				},
 			},
 		}, "main", nil)
 
@@ -767,10 +804,12 @@ func TestIdleTimeout(t *testing.T) {
 
 	t.Run("no timeout configured", func(t *testing.T) {
 		inst := instance.New("test", backendConfig, globalSettings, &instance.Options{
-			BackendType: backends.BackendTypeLlamaCpp,
 			IdleTimeout: nil, // No timeout
-			LlamaServerOptions: &backends.LlamaServerOptions{
-				Model: "/path/to/model.gguf",
+			BackendOptions: backends.Options{
+				BackendType: backends.BackendTypeLlamaCpp,
+				LlamaServerOptions: &backends.LlamaServerOptions{
+					Model: "/path/to/model.gguf",
+				},
 			},
 		}, "main", nil)
 		inst.SetStatus(instance.Running)
@@ -783,10 +822,12 @@ func TestIdleTimeout(t *testing.T) {
 	t.Run("timeout exceeded", func(t *testing.T) {
 		timeout := 1 // 1 minute
 		inst := instance.New("test", backendConfig, globalSettings, &instance.Options{
-			BackendType: backends.BackendTypeLlamaCpp,
 			IdleTimeout: &timeout,
-			LlamaServerOptions: &backends.LlamaServerOptions{
-				Model: "/path/to/model.gguf",
+			BackendOptions: backends.Options{
+				BackendType: backends.BackendTypeLlamaCpp,
+				LlamaServerOptions: &backends.LlamaServerOptions{
+					Model: "/path/to/model.gguf",
+				},
 			},
 		}, "main", nil)
 		inst.SetStatus(instance.Running)
diff --git a/pkg/manager/manager_test.go b/pkg/manager/manager_test.go
index 77ac409..8c1be1c 100644
--- a/pkg/manager/manager_test.go
+++ b/pkg/manager/manager_test.go
@@ -70,10 +70,12 @@ func TestPersistence(t *testing.T) {
 	// Test instance persistence on creation
 	manager1 := manager.NewInstanceManager(backendConfig, cfg, map[string]config.NodeConfig{}, "main")
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -132,9 +134,11 @@ func TestConcurrentAccess(t *testing.T) {
 		go func(index int) {
 			defer wg.Done()
 			options := &instance.Options{
-				BackendType: backends.BackendTypeLlamaCpp,
-				LlamaServerOptions: &backends.LlamaServerOptions{
-					Model: "/path/to/model.gguf",
+				BackendOptions: backends.Options{
+					BackendType: backends.BackendTypeLlamaCpp,
+					LlamaServerOptions: &backends.LlamaServerOptions{
+						Model: "/path/to/model.gguf",
+					},
 				},
 			}
 			instanceName := fmt.Sprintf("concurrent-test-%d", index)
@@ -169,9 +173,11 @@ func TestShutdown(t *testing.T) {
 
 	// Create test instance
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 	_, err := mgr.CreateInstance("test-instance", options)
@@ -230,11 +236,13 @@ func TestAutoRestartDisabledInstanceStatus(t *testing.T) {
 
 	autoRestart := false
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
 		AutoRestart: &autoRestart,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
diff --git a/pkg/manager/operations_test.go b/pkg/manager/operations_test.go
index fd1e62a..3a0651d 100644
--- a/pkg/manager/operations_test.go
+++ b/pkg/manager/operations_test.go
@@ -13,10 +13,12 @@ func TestCreateInstance_Success(t *testing.T) {
 	manager := createTestManager()
 
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  8080,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  8080,
+			},
 		},
 	}
 
@@ -40,9 +42,11 @@ func TestCreateInstance_ValidationAndLimits(t *testing.T) {
 	// Test duplicate names
 	mngr := createTestManager()
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -96,9 +100,11 @@ func TestPortManagement(t *testing.T) {
 
 	// Test auto port assignment
 	options1 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -114,10 +120,12 @@ func TestPortManagement(t *testing.T) {
 
 	// Test port conflict detection
 	options2 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model2.gguf",
-			Port:  port1, // Same port - should conflict
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model2.gguf",
+				Port:  port1, // Same port - should conflict
+			},
 		},
 	}
 
@@ -132,10 +140,12 @@ func TestPortManagement(t *testing.T) {
 	// Test port release on deletion
 	specificPort := 8080
 	options3 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
-			Port:  specificPort,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+				Port:  specificPort,
+			},
 		},
 	}
 
@@ -160,9 +170,11 @@ func TestInstanceOperations(t *testing.T) {
 	manager := createTestManager()
 
 	options := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -183,10 +195,12 @@ func TestInstanceOperations(t *testing.T) {
 
 	// Update instance
 	newOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/new-model.gguf",
-			Port:  8081,
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/new-model.gguf",
+				Port:  8081,
+			},
 		},
 	}
 
@@ -194,8 +208,8 @@ func TestInstanceOperations(t *testing.T) {
 	if err != nil {
 		t.Fatalf("UpdateInstance failed: %v", err)
 	}
-	if updated.GetOptions().LlamaServerOptions.Model != "/path/to/new-model.gguf" {
-		t.Errorf("Expected model '/path/to/new-model.gguf', got %q", updated.GetOptions().LlamaServerOptions.Model)
+	if updated.GetOptions().BackendOptions.LlamaServerOptions.Model != "/path/to/new-model.gguf" {
+		t.Errorf("Expected model '/path/to/new-model.gguf', got %q", updated.GetOptions().BackendOptions.LlamaServerOptions.Model)
 	}
 
 	// List instances
diff --git a/pkg/manager/timeout_test.go b/pkg/manager/timeout_test.go
index 54a342a..d1c3a47 100644
--- a/pkg/manager/timeout_test.go
+++ b/pkg/manager/timeout_test.go
@@ -35,9 +35,11 @@ func TestTimeoutFunctionality(t *testing.T) {
 	idleTimeout := 1 // 1 minute
 	options := &instance.Options{
 		IdleTimeout: &idleTimeout,
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 	}
 
@@ -84,9 +86,11 @@ func TestTimeoutFunctionality(t *testing.T) {
 
 	// Test that instance without timeout doesn't timeout
 	noTimeoutOptions := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model.gguf",
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model.gguf",
+			},
 		},
 		// No IdleTimeout set
 	}
@@ -115,25 +119,31 @@ func TestEvictLRUInstance_Success(t *testing.T) {
 
 	// Create 3 instances with idle timeout enabled (value doesn't matter for LRU logic)
 	options1 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model1.gguf",
-		},
 		IdleTimeout: func() *int { timeout := 1; return &timeout }(), // Any value > 0
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model1.gguf",
+			},
+		},
 	}
 	options2 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model2.gguf",
-		},
 		IdleTimeout: func() *int { timeout := 1; return &timeout }(), // Any value > 0
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model2.gguf",
+			},
+		},
 	}
 	options3 := &instance.Options{
-		BackendType: backends.BackendTypeLlamaCpp,
-		LlamaServerOptions: &backends.LlamaServerOptions{
-			Model: "/path/to/model3.gguf",
-		},
 		IdleTimeout: func() *int { timeout := 1; return &timeout }(), // Any value > 0
+		BackendOptions: backends.Options{
+			BackendType: backends.BackendTypeLlamaCpp,
+			LlamaServerOptions: &backends.LlamaServerOptions{
+				Model: "/path/to/model3.gguf",
+			},
+		},
 	}
 
 	inst1, err := manager.CreateInstance("instance-1", options1)
@@ -197,11 +207,13 @@ func TestEvictLRUInstance_NoEligibleInstances(t *testing.T) {
 	// Helper function to create instances with different timeout configurations
 	createInstanceWithTimeout := func(manager manager.InstanceManager, name, model string, timeout *int) *instance.Instance {
 		options := &instance.Options{
-			BackendType: backends.BackendTypeLlamaCpp,
-			LlamaServerOptions: &backends.LlamaServerOptions{
-				Model: model,
-			},
 			IdleTimeout: timeout,
+			BackendOptions: backends.Options{
+				BackendType: backends.BackendTypeLlamaCpp,
+				LlamaServerOptions: &backends.LlamaServerOptions{
+					Model: model,
+				},
+			},
 		}
 		inst, err := manager.CreateInstance(name, options)
 		if err != nil {
diff --git a/pkg/server/handlers_backends.go b/pkg/server/handlers_backends.go
index bd9cd3c..1ae2835 100644
--- a/pkg/server/handlers_backends.go
+++ b/pkg/server/handlers_backends.go
@@ -40,7 +40,7 @@ func (h *Handler) LlamaCppProxy(onDemandStart bool) http.HandlerFunc {
 			return
 		}
 
-		if options.BackendType != backends.BackendTypeLlamaCpp {
+		if options.BackendOptions.BackendType != backends.BackendTypeLlamaCpp {
 			http.Error(w, "Instance is not a llama.cpp server.", http.StatusBadRequest)
 			return
 		}
@@ -133,8 +133,10 @@ func (h *Handler) ParseLlamaCommand() http.HandlerFunc {
 			return
 		}
 		options := &instance.Options{
-			BackendType:        backends.BackendTypeLlamaCpp,
-			LlamaServerOptions: llamaOptions,
+			BackendOptions: backends.Options{
+				BackendType:        backends.BackendTypeLlamaCpp,
+				LlamaServerOptions: llamaOptions,
+			},
 		}
 		w.Header().Set("Content-Type", "application/json")
 		if err := json.NewEncoder(w).Encode(options); err != nil {
@@ -186,8 +188,10 @@ func (h *Handler) ParseMlxCommand() http.HandlerFunc {
 		backendType := backends.BackendTypeMlxLm
 
 		options := &instance.Options{
-			BackendType:      backendType,
-			MlxServerOptions: mlxOptions,
+			BackendOptions: backends.Options{
+				BackendType:      backendType,
+				MlxServerOptions: mlxOptions,
+			},
 		}
 
 		w.Header().Set("Content-Type", "application/json")
@@ -239,8 +243,10 @@ func (h *Handler) ParseVllmCommand() http.HandlerFunc {
 		backendType := backends.BackendTypeVllm
 
 		options := &instance.Options{
-			BackendType:       backendType,
-			VllmServerOptions: vllmOptions,
+			BackendOptions: backends.Options{
+				BackendType:       backendType,
+				VllmServerOptions: vllmOptions,
+			},
 		}
 
 		w.Header().Set("Content-Type", "application/json")
diff --git a/pkg/validation/validation_test.go b/pkg/validation/validation_test.go
index d772b21..e447666 100644
--- a/pkg/validation/validation_test.go
+++ b/pkg/validation/validation_test.go
@@ -2,8 +2,6 @@ package validation_test
 
 import (
 	"llamactl/pkg/backends"
-	"llamactl/pkg/instance"
-	"llamactl/pkg/testutil"
 	"llamactl/pkg/validation"
 	"strings"
 	"testing"
@@ -57,13 +55,11 @@ func TestValidateInstanceName(t *testing.T) {
 }
 
 func TestValidateInstanceOptions_NilOptions(t *testing.T) {
-	err := validation.ValidateInstanceOptions(nil)
+	var opts backends.Options
+	err := opts.ValidateInstanceOptions()
 	if err == nil {
 		t.Error("Expected error for nil options")
 	}
-	if !strings.Contains(err.Error(), "options cannot be nil") {
-		t.Errorf("Expected 'options cannot be nil' error, got: %v", err)
-	}
 }
 
 func TestValidateInstanceOptions_PortValidation(t *testing.T) {
@@ -82,14 +78,14 @@ func TestValidateInstanceOptions_PortValidation(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			options := &instance.Options{
+			options := backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Port: tt.port,
 				},
 			}
 
-			err := validation.ValidateInstanceOptions(options)
+			err := options.ValidateInstanceOptions()
 			if (err != nil) != tt.wantErr {
 				t.Errorf("ValidateInstanceOptions(port=%d) error = %v, wantErr %v", tt.port, err, tt.wantErr)
 			}
@@ -136,14 +132,14 @@ func TestValidateInstanceOptions_StringInjection(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			// Test with Model field (string field)
-			options := &instance.Options{
+			options := backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Model: tt.value,
 				},
 			}
 
-			err := validation.ValidateInstanceOptions(options)
+			err := options.ValidateInstanceOptions()
 			if (err != nil) != tt.wantErr {
 				t.Errorf("ValidateInstanceOptions(model=%q) error = %v, wantErr %v", tt.value, err, tt.wantErr)
 			}
@@ -174,14 +170,14 @@ func TestValidateInstanceOptions_ArrayInjection(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			// Test with Lora field (array field)
-			options := &instance.Options{
+			options := backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Lora: tt.array,
 				},
 			}
 
-			err := validation.ValidateInstanceOptions(options)
+			err := options.ValidateInstanceOptions()
 			if (err != nil) != tt.wantErr {
 				t.Errorf("ValidateInstanceOptions(lora=%v) error = %v, wantErr %v", tt.array, err, tt.wantErr)
 			}
@@ -193,12 +189,12 @@ func TestValidateInstanceOptions_MultipleFieldInjection(t *testing.T) {
 	// Test that injection in any field is caught
 	tests := []struct {
 		name    string
-		options *instance.Options
+		options backends.Options
 		wantErr bool
 	}{
 		{
 			name: "injection in model field",
-			options: &instance.Options{
+			options: backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Model:  "safe.gguf",
@@ -209,7 +205,7 @@ func TestValidateInstanceOptions_MultipleFieldInjection(t *testing.T) {
 		},
 		{
 			name: "injection in log file",
-			options: &instance.Options{
+			options: backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Model:   "safe.gguf",
@@ -220,7 +216,7 @@ func TestValidateInstanceOptions_MultipleFieldInjection(t *testing.T) {
 		},
 		{
 			name: "all safe fields",
-			options: &instance.Options{
+			options: backends.Options{
 				BackendType: backends.BackendTypeLlamaCpp,
 				LlamaServerOptions: &backends.LlamaServerOptions{
 					Model:   "/path/to/model.gguf",
@@ -236,7 +232,7 @@ func TestValidateInstanceOptions_MultipleFieldInjection(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := validation.ValidateInstanceOptions(tt.options)
+			err := tt.options.ValidateInstanceOptions()
 			if (err != nil) != tt.wantErr {
 				t.Errorf("ValidateInstanceOptions() error = %v, wantErr %v", err, tt.wantErr)
 			}
@@ -246,11 +242,8 @@ func TestValidateInstanceOptions_MultipleFieldInjection(t *testing.T) {
 
 func TestValidateInstanceOptions_NonStringFields(t *testing.T) {
 	// Test that non-string fields don't interfere with validation
-	options := &instance.Options{
-		AutoRestart:  testutil.BoolPtr(true),
-		MaxRestarts:  testutil.IntPtr(5),
-		RestartDelay: testutil.IntPtr(10),
-		BackendType:  backends.BackendTypeLlamaCpp,
+	options := backends.Options{
+		BackendType: backends.BackendTypeLlamaCpp,
 		LlamaServerOptions: &backends.LlamaServerOptions{
 			Port:        8080,
 			GPULayers:   32,
@@ -263,7 +256,7 @@ func TestValidateInstanceOptions_NonStringFields(t *testing.T) {
 		},
 	}
 
-	err := validation.ValidateInstanceOptions(options)
+	err := options.ValidateInstanceOptions()
 	if err != nil {
 		t.Errorf("ValidateInstanceOptions with non-string fields should not error, got: %v", err)
 	}