refactor: Make xtramcp backend host name configurable (#14)

Author: 4ndrelim

internal/libs/cfg/cfg.go

@@ -10,7 +10,8 @@ type Cfg struct {
 	OpenAIAPIKey  string
 	JwtSigningKey string
 
-	MongoURI string
+	MongoURI   string
+	XtraMCPURI string
 }
 
 var cfg *Cfg
@@ -21,11 +22,20 @@ func GetCfg() *Cfg {
 		OpenAIAPIKey:  os.Getenv("OPENAI_API_KEY"),
 		JwtSigningKey: os.Getenv("JWT_SIGNING_KEY"),
 		MongoURI:      mongoURI(),
+		XtraMCPURI:    xtraMCPURI(),
 	}
 
 	return cfg
 }
 
+func xtraMCPURI() string {
+	val := os.Getenv("XTRAMCP_URI")
+	if val != "" {
+		return val
+	}
+	return "http://paperdebugger-xtra-mcp-server.com/mcp"
+}
+
 func mongoURI() string {
 	val := os.Getenv("PD_MONGO_URI")
 	if val != "" {

internal/services/toolkit/client/client.go

@@ -51,7 +51,7 @@ func NewAIClient(
 	// toolRegistry.Register("greeting", tools.GreetingToolDescription, tools.GreetingTool)
 
 	// Load tools dynamically from backend
-	xtraMCPLoader := xtramcp.NewXtraMCPLoader(db, projectService, "http://paperdebugger-xtra-mcp-server.com/mcp")
+	xtraMCPLoader := xtramcp.NewXtraMCPLoader(db, projectService, cfg.XtraMCPURI)
 
 	// initialize MCP session first and log session ID
 	sessionID, err := xtraMCPLoader.InitializeMCP()