test(core): cover base schema + respond; neutralize tunnel log prefix

packages/core/test/unit/mcp/respond.test.ts

@@ -0,0 +1,21 @@
+import { describe, expect, it } from 'vitest'
+import { errorMessage, fail, ok } from '../../../src/mcp/respond.js'
+
+describe('respond helpers', () => {
+    it('ok wraps a JSON payload as text content', () => {
+        const r = ok({ a: 1 })
+        expect(r).toEqual({ content: [{ type: 'text', text: JSON.stringify({ a: 1 }) }] })
+        expect(r.isError).toBeUndefined()
+    })
+    it('fail returns an error result with the message text', () => {
+        const r = fail('boom')
+        expect(r.content).toEqual([{ type: 'text', text: 'boom' }])
+        expect(r.isError).toBe(true)
+    })
+    it('errorMessage extracts Error.message', () => {
+        expect(errorMessage(new Error('nope'))).toBe('nope')
+    })
+    it('errorMessage stringifies non-Errors', () => {
+        expect(errorMessage('plain')).toBe('plain')
+    })
+})