fix: set default baseUrl to https://api.stackone.com

Create a central consts.ts file with DEFAULT_BASE_URL constant and use it
as the default value in StackOneToolSet constructor. This allows users to
use the SDK without explicitly providing a baseUrl.

Closes #149

Author: claude

src/consts.ts

@@ -0,0 +1,4 @@
+/**
+ * Default base URL for StackOne API
+ */
+export const DEFAULT_BASE_URL = 'https://api.stackone.com';

src/index.ts

@@ -2,6 +2,7 @@
  * StackOne AI Node.js SDK
  */
 
+export { DEFAULT_BASE_URL } from './consts';
 export { BaseTool, StackOneTool, Tools } from './tool';
 export { createFeedbackTool } from './tools/feedback';
 export { StackOneAPIError, StackOneError } from './utils/errors';

src/tools/feedback.ts

@@ -1,4 +1,5 @@
 import { z } from 'zod';
+import { DEFAULT_BASE_URL } from '../consts';
 import { BaseTool } from '../tool';
 import type { ExecuteConfig, ExecuteOptions, JsonDict, ToolParameters } from '../types';
 import { StackOneError } from '../utils/errors';
@@ -39,7 +40,7 @@ const feedbackInputSchema = z.object({
 export function createFeedbackTool(
   apiKey?: string,
   accountId?: string,
-  baseUrl = 'https://api.stackone.com'
+  baseUrl = DEFAULT_BASE_URL
 ): BaseTool {
   const options: FeedbackToolOptions = {
     apiKey,
@@ -102,7 +103,7 @@ export function createFeedbackTool(
   }
 
   const tool = new BaseTool(name, description, parameters, executeConfig, authHeaders);
-  const resolvedBaseUrl = options.baseUrl || 'https://api.stackone.com';
+  const resolvedBaseUrl = options.baseUrl || DEFAULT_BASE_URL;
 
   tool.execute = async function (
     this: BaseTool,

src/toolsets/stackone.ts

@@ -1,3 +1,4 @@
+import { DEFAULT_BASE_URL } from '../consts';
 import { type StackOneTool, Tools } from '../tool';
 import { createFeedbackTool } from '../tools/feedback';
 import { type BaseToolSetConfig, ToolSet, ToolSetConfigError } from './base';
@@ -94,7 +95,7 @@ export class StackOneToolSet extends ToolSet {
 
     // Initialise base class
     super({
-      baseUrl: config?.baseUrl,
+      baseUrl: config?.baseUrl || process.env.STACKONE_BASE_URL || DEFAULT_BASE_URL,
       authentication,
       headers,
     });