fix: preserve config imports defaults

CHANGELOG.md

@@ -2,7 +2,8 @@
 
 ## [Unreleased]
 
-- Nothing yet.
+### CLI
+- Preserve default imports when `mcporter config add` writes a config file, instead of forcing `"imports": []`.
 
 ## [0.7.3] - 2025-12-29
 

src/cli/config/shared.ts

@@ -20,7 +20,7 @@ export type ConfigLocationSummary = {
 export function cloneConfig(config: RawConfig): RawConfig {
   return {
     mcpServers: config.mcpServers ? { ...config.mcpServers } : {},
-    imports: config.imports ? [...config.imports] : [],
+    imports: config.imports ? [...config.imports] : undefined,
   };
 }
 
@@ -32,7 +32,7 @@ export async function loadOrCreateConfig(loadOptions: LoadConfigOptions): Promis
     if (isErrno(error, 'ENOENT')) {
       const rootDir = loadOptions.rootDir ?? process.cwd();
       const resolved = resolveConfigPath(loadOptions.configPath, rootDir);
-      return { config: { mcpServers: {}, imports: [] }, path: resolved.path };
+      return { config: { mcpServers: {} }, path: resolved.path };
     }
     throw error;
   }

tests/config-add-imports.test.ts

@@ -0,0 +1,28 @@
+import fs from 'node:fs/promises';
+import { describe, expect, it } from 'vitest';
+import { handleAddCommand } from '../src/cli/config/add.js';
+import { createTempConfig } from './fixtures/config-fixture.js';
+
+describe('config add imports preservation', () => {
+  it('keeps imports undefined when config omits the key', async () => {
+    const ctx = await createTempConfig({ mcpServers: {} });
+
+    await handleAddCommand({ loadOptions: ctx.loadOptions } as never, ['local', 'https://local.example/mcp']);
+
+    const buffer = await fs.readFile(ctx.configPath, 'utf8');
+    const parsed = JSON.parse(buffer) as { imports?: string[] };
+    expect(Object.hasOwn(parsed, 'imports')).toBe(false);
+    await ctx.cleanup();
+  });
+
+  it('keeps imports undefined when creating a new config file', async () => {
+    const ctx = await createTempConfig();
+
+    await handleAddCommand({ loadOptions: ctx.loadOptions } as never, ['fresh', 'https://fresh.example/mcp']);
+
+    const buffer = await fs.readFile(ctx.configPath, 'utf8');
+    const parsed = JSON.parse(buffer) as { imports?: string[] };
+    expect(Object.hasOwn(parsed, 'imports')).toBe(false);
+    await ctx.cleanup();
+  });
+});