refactor(toolsets): remove unified API validation and support

Remove the unified API tool validation that was previously used to detect
legacy/misconfigured accounts. This validation is no longer needed as
the unified API architecture has been deprecated.

Changes:
- Remove UNIFIED_API_PREFIX constant from consts.ts
- Remove validateToolName() method from StackOneToolSet class
- Remove unified API tool validation call in fetchTools()
- Remove UNIFIED_API_PREFIX import from toolsets.ts
- Remove @see reference to unified-cloud-api in schema.ts
- Remove corresponding unit test for unified API tool detection

This simplifies the codebase by removing code paths that are no longer
relevant to the current API architecture.

Author: ryoppippi

src/consts.ts

@@ -18,9 +18,3 @@ export const DEFAULT_BASE_URL = 'https://api.stackone.com';
  * - Higher values favor TF-IDF scoring (better semantic matching)
  */
 export const DEFAULT_HYBRID_ALPHA = 0.2;
-
-/**
- * Prefix used by legacy Unified API tools.
- * Tools with this prefix indicate missing or incorrect account configuration.
- */
-export const UNIFIED_API_PREFIX = 'unified_';

src/schema.ts

@@ -35,7 +35,6 @@ const rpcActionResponseDataSchema = z.union([
  * - `next`: Pagination cursor for fetching next page
  *
  * Additional fields from the connector response are passed through.
- * @see unified-cloud-api/src/unified-api-v2/unifiedAPIv2.service.ts processActionCall
  */
 export const rpcActionResponseSchema = z.looseObject({
 	next: z.nullable(z.optional(z.string())),

src/toolsets.test.ts

@@ -250,36 +250,6 @@ describe('StackOneToolSet', () => {
 			const executableTool = (await tool?.toAISDK())?.dummy_action;
 			expect(executableTool?.execute).toBeDefined();
 		});
-
-		it('throws error when receiving unified API tools', async () => {
-			const unifiedToolMcpApp = createMcpApp({
-				accountTools: {
-					'unified-test-account': [
-						{
-							name: 'unified_hris_list_employees',
-							description: 'Unified HRIS tool',
-							inputSchema: { type: 'object', properties: {} },
-						},
-					],
-				},
-			});
-
-			server.use(
-				http.all('https://api.stackone-dev.com/mcp', async ({ request }) => {
-					return unifiedToolMcpApp.fetch(request);
-				}),
-			);
-
-			const toolset = new StackOneToolSet({
-				baseUrl: 'https://api.stackone-dev.com',
-				apiKey: 'test-key',
-				accountId: 'unified-test-account',
-			});
-
-			await expect(toolset.fetchTools()).rejects.toThrow(ToolSetConfigError);
-			await expect(toolset.fetchTools()).rejects.toThrow(/unified API tool/);
-			await expect(toolset.fetchTools()).rejects.toThrow(/unified_hris_list_employees/);
-		});
 	});
 
 	describe('account filtering', () => {

src/toolsets.ts

@@ -1,6 +1,6 @@
 import { defu } from 'defu';
 import type { MergeExclusive, SimplifyDeep } from 'type-fest';
-import { DEFAULT_BASE_URL, UNIFIED_API_PREFIX } from './consts';
+import { DEFAULT_BASE_URL } from './consts';
 import { createFeedbackTool } from './feedback';
 import { type StackOneHeaders, normalizeHeaders, stackOneHeadersSchema } from './headers';
 import { createMCPClient } from './mcp-client';
@@ -313,19 +313,6 @@ export class StackOneToolSet {
 		return toolsWithFeedback;
 	}
 
-	/**
-	 * Validate that tool name is not from unified API
-	 * Unified API tools indicate missing or incorrect account configuration
-	 */
-	private validateToolName(toolName: string): void {
-		if (toolName.startsWith(UNIFIED_API_PREFIX)) {
-			throw new ToolSetConfigError(
-				`Received unified API tool "${toolName}". This indicates the account is not properly configured. ` +
-					`Unified API tools require versioned connectors. Please check your account's integration setup.`,
-			);
-		}
-	}
-
 	/**
 	 * Fetch tool definitions from MCP
 	 */
@@ -344,8 +331,6 @@ export class StackOneToolSet {
 		const actionsClient = this.getActionsClient();
 
 		const tools = listToolsResult.tools.map(({ name, description, inputSchema }) => {
-			this.validateToolName(name);
-
 			return this.createRpcBackedTool({
 				actionsClient,
 				name,