refactor(consts): extract hard-coded strings into constants (#226)

Author: ryoppippi

src/consts.ts

@@ -1,3 +1,8 @@
+/**
+ * Package name used as User-Agent header
+ */
+export const USER_AGENT = 'stackone-ai-node';
+
 /**
  * Default base URL for StackOne API
  */

src/requestBuilder.ts

@@ -1,3 +1,4 @@
+import { USER_AGENT } from './consts';
 import {
 	type ExecuteOptions,
 	type HttpBodyType,
@@ -57,7 +58,7 @@ export class RequestBuilder {
 	 */
 	prepareHeaders(): Record<string, string> {
 		return {
-			'User-Agent': 'stackone-ai-node',
+			'User-Agent': USER_AGENT,
 			...this.headers,
 		};
 	}

src/rpc-client.ts

@@ -1,3 +1,4 @@
+import { DEFAULT_BASE_URL, USER_AGENT } from './consts';
 import { STACKONE_HEADER_KEYS } from './headers';
 import {
 	type RpcActionRequest,
@@ -25,7 +26,7 @@ export class RpcClient {
 
 	constructor(config: RpcClientConfig) {
 		const validatedConfig = rpcClientConfigSchema.parse(config);
-		this.baseUrl = validatedConfig.serverURL || 'https://api.stackone.com';
+		this.baseUrl = validatedConfig.serverURL || DEFAULT_BASE_URL;
 		const username = validatedConfig.security.username;
 		const password = validatedConfig.security.password || '';
 		this.authHeader = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
@@ -68,7 +69,7 @@ export class RpcClient {
 			const httpHeaders = {
 				'Content-Type': 'application/json',
 				Authorization: this.authHeader,
-				'User-Agent': 'stackone-ai-node',
+				'User-Agent': USER_AGENT,
 				...forwardedHeaders,
 			} satisfies Record<string, string>;
 

src/utils/errors.ts

@@ -1,4 +1,4 @@
-// Type aliases for common types
+import { USER_AGENT } from '../consts';
 
 /**
  * Base exception for StackOne errors
@@ -73,7 +73,7 @@ export class StackOneAPIError extends StackOneError {
 		// Add request headers information (for debugging)
 		errorMessage += '\n\nRequest Headers:';
 		errorMessage += '\n- Authorization: [REDACTED]';
-		errorMessage += '\n- User-Agent: stackone-ai-node';
+		errorMessage += `\n- User-Agent: ${USER_AGENT}`;
 
 		// Add request body information if available
 		if (this.requestBody) {