Add GPU fallback support via unified compute field

pkg/projectconfig/config.go

@@ -28,7 +28,9 @@ type DeploymentConfig struct {
 type HardwareConfig struct {
 	CPU      *float64 `mapstructure:"cpu" toml:"cpu,omitempty"`
 	Memory   *float64 `mapstructure:"memory" toml:"memory,omitempty"`
-	Compute  *string  `mapstructure:"compute" toml:"compute,omitempty"`
+	ComputeRaw       interface{} `mapstructure:"compute" toml:"compute,omitempty"`
+	Compute          *string     `mapstructure:"-" toml:"-"`
+	ComputeFallbacks []string    `mapstructure:"-" toml:"-"`
 	GPUCount *int     `mapstructure:"gpu_count" toml:"gpu_count,omitempty"`
 	Provider *string  `mapstructure:"provider" toml:"provider,omitempty"`
 	Region   *string  `mapstructure:"region" toml:"region,omitempty"`
@@ -114,7 +116,12 @@ func (pc *ProjectConfig) ToPayload() map[string]any {
 		payload["memory"] = *pc.Hardware.Memory
 	}
 	if pc.Hardware.Compute != nil {
-		payload["compute"] = *pc.Hardware.Compute
+		if len(pc.Hardware.ComputeFallbacks) > 0 {
+			all := append([]string{*pc.Hardware.Compute}, pc.Hardware.ComputeFallbacks...)
+			payload["compute"] = all
+		} else {
+			payload["compute"] = *pc.Hardware.Compute
+		}
 	}
 	if pc.Hardware.GPUCount != nil && pc.Hardware.Compute != nil && *pc.Hardware.Compute != "CPU" {
 		payload["gpuCount"] = *pc.Hardware.GPUCount
@@ -160,6 +167,9 @@ func (pc *ProjectConfig) ToPayload() map[string]any {
 	if pc.Scaling.LoadBalancingAlgorithm != nil {
 		payload["loadBalancingAlgorithm"] = *pc.Scaling.LoadBalancingAlgorithm
 	}
+	if pc.Scaling.ComputeTier != nil {
+		payload["computeTier"] = *pc.Scaling.ComputeTier
+	}
 
 	// Runtime configuration
 	if pc.CustomRuntime != nil && pc.PartnerService != nil {

pkg/projectconfig/loader.go

@@ -113,6 +113,11 @@ func Load(configPath string) (*ProjectConfig, error) {
 		}
 	}
 
+	// Normalize compute: accepts string or array
+	if err := normalizeCompute(&config.Hardware); err != nil {
+		return nil, err
+	}
+
 	// Validate compute_tier before applying defaults
 	if config.Scaling.ComputeTier != nil {
 		tier := *config.Scaling.ComputeTier
@@ -127,6 +132,35 @@ func Load(configPath string) (*ProjectConfig, error) {
 	return &config, nil
 }
 
+func normalizeCompute(hw *HardwareConfig) error {
+	if hw.ComputeRaw == nil {
+		return nil
+	}
+	switch v := hw.ComputeRaw.(type) {
+	case string:
+		hw.Compute = &v
+	case []interface{}:
+		if len(v) == 0 {
+			return fmt.Errorf("compute array must not be empty")
+		}
+		first, ok := v[0].(string)
+		if !ok {
+			return fmt.Errorf("compute values must be strings")
+		}
+		hw.Compute = &first
+		for _, item := range v[1:] {
+			s, ok := item.(string)
+			if !ok {
+				return fmt.Errorf("compute values must be strings")
+			}
+			hw.ComputeFallbacks = append(hw.ComputeFallbacks, s)
+		}
+	default:
+		return fmt.Errorf("compute must be a string or array of strings")
+	}
+	return nil
+}
+
 // applyDefaults sets default values for fields that weren't specified in the config
 func applyDefaults(config *ProjectConfig) {
 	// Apply deployment defaults