Add Promptkit configuration and inspection seams

internal/config/validate.go

@@ -65,6 +65,9 @@ func Validate(cfg Config) error {
 	if cfg.Scriptorium.Timeout <= 0 {
 		return fmt.Errorf("scriptorium.timeout must be greater than zero")
 	}
+	if err := validatePromptkit(cfg.Promptkit); err != nil {
+		return err
+	}
 	if cfg.Workspace.Root == "" {
 		return fmt.Errorf("workspace.root is required")
 	}
@@ -85,6 +88,25 @@ func Validate(cfg Config) error {
 	return nil
 }
 
+func validatePromptkit(cfg PromptkitConfig) error {
+	if cfg.ProfileFile != "" && cfg.ProfileDir != "" {
+		return fmt.Errorf("promptkit.profile_file and promptkit.profile_dir cannot both be configured")
+	}
+	if cfg.Timeout <= 0 {
+		return fmt.Errorf("promptkit.timeout must be greater than zero")
+	}
+	if cfg.Local.Endpoint != "" {
+		parsed, err := url.Parse(cfg.Local.Endpoint)
+		if err != nil || parsed.Scheme == "" || parsed.Host == "" {
+			return fmt.Errorf("promptkit.local.endpoint must be an absolute URL when configured")
+		}
+	}
+	if cfg.Local.ConcurrencyLimit < 0 {
+		return fmt.Errorf("promptkit.local.concurrency_limit must be zero or greater")
+	}
+	return nil
+}
+
 func validateDistributorNotify(cfg DistributorNotifyConfig) error {
 	if !cfg.Enabled {
 		return nil