feat: add OpenAI Responses API configuration control via CLI flag

## CHANGES

- Add `--disable-responses-api` CLI flag for OpenAI control
- Implement `SetResponsesAPIEnabled` method in OpenAI client
- Configure OpenAI Responses API setting during CLI initialization
- Update default config path to `~/.config/fabric/config.yaml`
- Add OpenAI import to CLI package dependencies

internal/cli/cli.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/danielmiessler/fabric/internal/core"
+	"github.com/danielmiessler/fabric/internal/plugins/ai/openai"
 	"github.com/danielmiessler/fabric/internal/tools/converter"
 	"github.com/danielmiessler/fabric/internal/tools/youtube"
 )
@@ -36,6 +37,11 @@ func Cli(version string) (err error) {
 		}
 	}
 
+	// Configure OpenAI Responses API setting based on CLI flag
+	if registry != nil {
+		configureOpenAIResponsesAPI(registry, currentFlags.DisableResponsesAPI)
+	}
+
 	// Handle setup and server commands
 	var handled bool
 	if handled, err = handleSetupAndServerCommands(currentFlags, registry, version); err != nil || handled {
@@ -142,3 +148,21 @@ func WriteOutput(message string, outputFile string) (err error) {
 	}
 	return
 }
+
+// configureOpenAIResponsesAPI configures the OpenAI client's Responses API setting based on the CLI flag
+func configureOpenAIResponsesAPI(registry *core.PluginRegistry, disableResponsesAPI bool) {
+	// Find the OpenAI vendor in the registry
+	if registry != nil && registry.VendorsAll != nil {
+		for _, vendor := range registry.VendorsAll.Vendors {
+			if vendor.GetName() == "OpenAI" {
+				// Type assertion to access the OpenAI-specific method
+				if openaiClient, ok := vendor.(*openai.Client); ok {
+					// Invert the disable flag to get the enable flag
+					enableResponsesAPI := !disableResponsesAPI
+					openaiClient.SetResponsesAPIEnabled(enableResponsesAPI)
+				}
+				break
+			}
+		}
+	}
+}

internal/cli/flags.go

@@ -86,6 +86,7 @@ type Flags struct {
 	SuppressThink                   bool              `long:"suppress-think" yaml:"suppressThink" description:"Suppress text enclosed in thinking tags"`
 	ThinkStartTag                   string            `long:"think-start-tag" yaml:"thinkStartTag" description:"Start tag for thinking sections" default:"<think>"`
 	ThinkEndTag                     string            `long:"think-end-tag" yaml:"thinkEndTag" description:"End tag for thinking sections" default:"</think>"`
+	DisableResponsesAPI             bool              `long:"disable-responses-api" yaml:"disableResponsesAPI" description:"Disable OpenAI Responses API (default: false)"`
 }
 
 var debug = false
@@ -142,9 +143,9 @@ func Init() (ret *Flags, err error) {
 		return
 	}
 
-	// Check to see if a ~/.fabric.yaml config file exists (only when user didn't specify a config)
+	// Check to see if a ~/.config/fabric/config.yaml config file exists (only when user didn't specify a config)
 	if ret.Config == "" {
-		// Default to ~/.fabric.yaml if no config specified
+		// Default to ~/.config/fabric/config.yaml if no config specified
 		if defaultConfigPath, err := util.GetDefaultConfigPath(); err == nil && defaultConfigPath != "" {
 			ret.Config = defaultConfigPath
 		} else if err != nil {

internal/plugins/ai/openai/openai.go

@@ -66,6 +66,11 @@ type Client struct {
 	ImplementsResponses bool // Whether this provider supports the Responses API
 }
 
+// SetResponsesAPIEnabled configures whether to use the Responses API
+func (o *Client) SetResponsesAPIEnabled(enabled bool) {
+	o.ImplementsResponses = enabled
+}
+
 func (o *Client) configure() (ret error) {
 	opts := []option.RequestOption{option.WithAPIKey(o.ApiKey.Value)}
 	if o.ApiBaseURL.Value != "" {

internal/util/utils.go

@@ -80,7 +80,7 @@ func GetDefaultConfigPath() (string, error) {
 		return "", fmt.Errorf("could not determine user home directory: %w", err)
 	}
 
-	defaultConfigPath := filepath.Join(homeDir, ".fabric.yaml")
+	defaultConfigPath := filepath.Join(homeDir, ".config", "fabric", "config.yaml")
 	if _, err := os.Stat(defaultConfigPath); err != nil {
 		if os.IsNotExist(err) {
 			return "", nil // Return no error for non-existent config path