From fae6e15cd406153a82f97bc6cef646a49d0e5478 Mon Sep 17 00:00:00 2001
From: Hoang Nguyen <hoangnn93@gmail.com>
Date: Sat, 27 Jun 2026 08:17:21 +0000
Subject: [PATCH 1/3] Avoid config timestamp churn on install

---
 packages/cli/src/__tests__/lib/Config.test.ts | 22 +++++++++++++++++++
 packages/cli/src/lib/Config.ts                | 22 +++++++++++++++----
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/packages/cli/src/__tests__/lib/Config.test.ts b/packages/cli/src/__tests__/lib/Config.test.ts
index dbb932a8..b432340a 100644
--- a/packages/cli/src/__tests__/lib/Config.test.ts
+++ b/packages/cli/src/__tests__/lib/Config.test.ts
@@ -162,6 +162,28 @@ describe('ConfigManager', () => {
       expect(result.createdAt).toBe(existingConfig.createdAt);
     });
 
+    it('should not rewrite config or change updatedAt when updates are unchanged', async () => {
+      const existingConfig: DevKitConfig = {
+        version: '1.0.0',
+        environments: ['cursor'],
+        phases: [],
+        skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }],
+        createdAt: '2024-01-01T00:00:00.000Z',
+        updatedAt: '2024-01-01T00:00:00.000Z'
+      };
+
+      (mockFs.pathExists as any).mockResolvedValue(true);
+      (mockFs.readJson as any).mockResolvedValue(existingConfig);
+
+      const result = await configManager.update({
+        environments: ['cursor'],
+        skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }]
+      });
+
+      expect(result).toEqual(existingConfig);
+      expect(mockFs.writeJson).not.toHaveBeenCalled();
+    });
+
     it('should throw error when config file not found', async () => {
       (mockFs.readJson as any).mockResolvedValue(null);
 
diff --git a/packages/cli/src/lib/Config.ts b/packages/cli/src/lib/Config.ts
index 75ec43a2..74078157 100644
--- a/packages/cli/src/lib/Config.ts
+++ b/packages/cli/src/lib/Config.ts
@@ -7,6 +7,12 @@ import packageJson from '../../package.json' with { type: 'json' };
 
 const CONFIG_FILE_NAME = '.ai-devkit.json';
 
+function withoutUpdatedAt(config: DevKitConfig): Omit<DevKitConfig, 'updatedAt'> {
+  const { updatedAt, ...meaningfulConfig } = config;
+  void updatedAt;
+  return meaningfulConfig;
+}
+
 export class ConfigManager {
   private configPath: string;
 
@@ -48,9 +54,17 @@ export class ConfigManager {
       throw new ConfigNotFoundError('Config file not found. Run ai-devkit init first.');
     }
 
-    const updated = {
+    const nextConfig = {
       ...config,
-      ...updates,
+      ...updates
+    };
+
+    if (JSON.stringify(withoutUpdatedAt(nextConfig)) === JSON.stringify(withoutUpdatedAt(config))) {
+      return config;
+    }
+
+    const updated = {
+      ...nextConfig,
       updatedAt: new Date().toISOString()
     };
 
@@ -64,7 +78,7 @@ export class ConfigManager {
       throw new ConfigNotFoundError('Config file not found. Run ai-devkit init first.');
     }
 
-    const phases = Array.isArray(config.phases) ? config.phases : [];
+    const phases = Array.isArray(config.phases) ? [...config.phases] : [];
     if (!phases.includes(phase)) {
       phases.push(phase);
       return this.update({ phases });
@@ -141,7 +155,7 @@ export class ConfigManager {
       throw new ConfigNotFoundError('Config file not found. Run ai-devkit init first.');
     }
 
-    const installed = Array.isArray(config.skills) ? config.skills : [];
+    const installed = Array.isArray(config.skills) ? [...config.skills] : [];
 
     const exists = installed.some(
       entry => entry.registry === skill.registry && entry.name === skill.name

From a9ee0a08df07e91b9e635cadd7a4d03cacbb2e14 Mon Sep 17 00:00:00 2001
From: Hoang Nguyen <hoangnn93@gmail.com>
Date: Sat, 27 Jun 2026 11:57:31 +0000
Subject: [PATCH 2/3] Remove updatedAt from project config

---
 .ai-devkit.json                               |  1 -
 e2e/cli.e2e.ts                                | 15 ++--
 packages/cli/src/__tests__/lib/Config.test.ts | 68 +++++++++----------
 packages/cli/src/lib/Config.ts                | 23 +++----
 packages/cli/src/types.ts                     |  1 -
 web/content/docs/11-configuration-file.md     |  9 ++-
 6 files changed, 51 insertions(+), 66 deletions(-)

diff --git a/.ai-devkit.json b/.ai-devkit.json
index f10b5a05..51083048 100644
--- a/.ai-devkit.json
+++ b/.ai-devkit.json
@@ -9,7 +9,6 @@
     "antigravity"
   ],
   "createdAt": "2025-12-28T13:35:45.251Z",
-  "updatedAt": "2026-06-14T11:53:00.073Z",
   "phases": [
     "requirements",
     "design",
diff --git a/e2e/cli.e2e.ts b/e2e/cli.e2e.ts
index 56cb46e6..d93207fe 100644
--- a/e2e/cli.e2e.ts
+++ b/e2e/cli.e2e.ts
@@ -207,8 +207,7 @@ describe('memory commands', () => {
       memory: {
         path: '.ai-devkit/memory.db'
       },
-      createdAt: new Date().toISOString(),
-      updatedAt: new Date().toISOString()
+      createdAt: new Date().toISOString()
     });
   });
 
@@ -335,8 +334,7 @@ describe('install command', () => {
       version: '1.0.0',
       environments: ['claude'],
       phases: ['requirements', 'design'],
-      createdAt: new Date().toISOString(),
-      updatedAt: new Date().toISOString()
+      createdAt: new Date().toISOString()
     });
 
     const result = run('install', { cwd: projectDir });
@@ -359,8 +357,7 @@ describe('install command', () => {
       skills: [
         { registry: 'codeaholicguy/ai-devkit', name: 'dev-lifecycle' }
       ],
-      createdAt: new Date().toISOString(),
-      updatedAt: new Date().toISOString()
+      createdAt: new Date().toISOString()
     });
 
     const result = run('install', { cwd: projectDir });
@@ -398,8 +395,7 @@ describe('skill command', () => {
         skills: [
           { registry: 'codeaholicguy/ai-devkit', name: 'dev-lifecycle' }
         ],
-        createdAt: new Date().toISOString(),
-        updatedAt: new Date().toISOString()
+        createdAt: new Date().toISOString()
       });
 
       // Create the skill directory so the remove command finds it
@@ -427,8 +423,7 @@ describe('skill command', () => {
           { registry: 'codeaholicguy/ai-devkit', name: 'dev-lifecycle' },
           { registry: 'codeaholicguy/ai-devkit', name: 'memory' }
         ],
-        createdAt: new Date().toISOString(),
-        updatedAt: new Date().toISOString()
+        createdAt: new Date().toISOString()
       });
 
       const skillDir = join(projectDir, '.claude', 'skills', 'dev-lifecycle');
diff --git a/packages/cli/src/__tests__/lib/Config.test.ts b/packages/cli/src/__tests__/lib/Config.test.ts
index b432340a..e0f61ddf 100644
--- a/packages/cli/src/__tests__/lib/Config.test.ts
+++ b/packages/cli/src/__tests__/lib/Config.test.ts
@@ -94,7 +94,6 @@ describe('ConfigManager', () => {
         environments: ['cursor' as any],
         phases: ['requirements' as any],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -123,7 +122,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: expect.any(String),
-        updatedAt: expect.any(String)
       };
 
       (mockFs.writeJson as any).mockResolvedValue(undefined);
@@ -136,17 +134,17 @@ describe('ConfigManager', () => {
         expectedConfig,
         { spaces: 2 }
       );
+      expect(result).not.toHaveProperty('updatedAt');
     });
   });
 
   describe('update', () => {
-    it('should update existing config and set updatedAt', async () => {
+    it('should update existing config without adding updatedAt', async () => {
       const existingConfig: DevKitConfig = {
         version: '1.0.0',
         environments: ['cursor'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       const updates = { environments: ['cursor' as any, 'claude' as any] };
@@ -158,18 +156,17 @@ describe('ConfigManager', () => {
       const result = await configManager.update(updates);
 
       expect(result.environments).toEqual(['cursor', 'claude']);
-      expect(result.updatedAt).not.toBe(existingConfig.updatedAt);
       expect(result.createdAt).toBe(existingConfig.createdAt);
+      expect(result).not.toHaveProperty('updatedAt');
     });
 
-    it('should not rewrite config or change updatedAt when updates are unchanged', async () => {
+    it('should not rewrite config when updates are unchanged and updatedAt is absent', async () => {
       const existingConfig: DevKitConfig = {
         version: '1.0.0',
         environments: ['cursor'],
         phases: [],
         skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -184,6 +181,34 @@ describe('ConfigManager', () => {
       expect(mockFs.writeJson).not.toHaveBeenCalled();
     });
 
+    it('should remove legacy updatedAt when updating config', async () => {
+      const existingConfig = {
+        version: '1.0.0',
+        environments: ['cursor'],
+        phases: [],
+        createdAt: '2024-01-01T00:00:00.000Z',
+        updatedAt: '2024-01-01T00:00:00.000Z'
+      };
+
+      (mockFs.pathExists as any).mockResolvedValue(true);
+      (mockFs.readJson as any).mockResolvedValue(existingConfig);
+      (mockFs.writeJson as any).mockResolvedValue(undefined);
+
+      const result = await configManager.update({});
+
+      expect(result).not.toHaveProperty('updatedAt');
+      expect(mockFs.writeJson).toHaveBeenCalledWith(
+        '/test/dir/.ai-devkit.json',
+        {
+          version: '1.0.0',
+          environments: ['cursor'],
+          phases: [],
+          createdAt: '2024-01-01T00:00:00.000Z'
+        },
+        { spaces: 2 }
+      );
+    });
+
     it('should throw error when config file not found', async () => {
       (mockFs.readJson as any).mockResolvedValue(null);
 
@@ -200,7 +225,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: ['requirements'],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -218,7 +242,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: ['requirements'],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -235,7 +258,6 @@ describe('ConfigManager', () => {
         version: '1.0.0',
         environments: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -255,7 +277,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: ['requirements', 'design'],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -272,7 +293,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: ['requirements'],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -296,7 +316,6 @@ describe('ConfigManager', () => {
         version: '1.0.0',
         environments: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -316,7 +335,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -333,7 +351,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -360,7 +377,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: ['requirements', 'deployment'],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -377,7 +393,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -396,7 +411,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -417,7 +431,6 @@ describe('ConfigManager', () => {
         environments: ['cursor', 'claude'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -442,7 +455,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -461,7 +473,6 @@ describe('ConfigManager', () => {
         environments: ['cursor'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -482,7 +493,6 @@ describe('ConfigManager', () => {
         environments: ['cursor', 'claude'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -499,7 +509,6 @@ describe('ConfigManager', () => {
         environments: ['cursor'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -519,7 +528,6 @@ describe('ConfigManager', () => {
         phases: [],
         skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -545,7 +553,6 @@ describe('ConfigManager', () => {
         phases: [],
         skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -566,7 +573,6 @@ describe('ConfigManager', () => {
         environments: ['cursor'],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -596,7 +602,6 @@ describe('ConfigManager', () => {
           { registry: 'codeaholicguy/ai-devkit', name: 'memory' }
         ],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -620,7 +625,6 @@ describe('ConfigManager', () => {
           { registry: 'codeaholicguy/ai-devkit', name: 'dev-lifecycle' }
         ],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -642,7 +646,6 @@ describe('ConfigManager', () => {
           { registry: 'codeaholicguy/ai-devkit', name: 'memory' }
         ],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       };
 
       (mockFs.pathExists as any).mockResolvedValue(true);
@@ -677,7 +680,6 @@ describe('ConfigManager', () => {
           'invalid/value': false
         },
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       const registries = await configManager.getSkillRegistries();
@@ -695,7 +697,6 @@ describe('ConfigManager', () => {
         phases: [],
         skills: [{ registry: 'codeaholicguy/ai-devkit', name: 'debug' }],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       const registries = await configManager.getSkillRegistries();
@@ -720,7 +721,6 @@ describe('ConfigManager', () => {
         environments: [],
         phases: [],
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       const result = await configManager.getMemoryDbPath();
@@ -736,7 +736,6 @@ describe('ConfigManager', () => {
         phases: [],
         memory: { path: '   ' },
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       await expect(configManager.getMemoryDbPath()).resolves.toBeUndefined();
@@ -747,7 +746,6 @@ describe('ConfigManager', () => {
         phases: [],
         memory: { path: 42 },
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       await expect(configManager.getMemoryDbPath()).resolves.toBeUndefined();
@@ -761,7 +759,6 @@ describe('ConfigManager', () => {
         phases: [],
         memory: { path: '/custom/memory.db' },
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       const result = await configManager.getMemoryDbPath();
@@ -778,7 +775,6 @@ describe('ConfigManager', () => {
         phases: [],
         memory: { path: '.ai-devkit/project-memory.db' },
         createdAt: '2024-01-01T00:00:00.000Z',
-        updatedAt: '2024-01-01T00:00:00.000Z'
       });
 
       const result = await configManager.getMemoryDbPath();
diff --git a/packages/cli/src/lib/Config.ts b/packages/cli/src/lib/Config.ts
index 74078157..8d84e7b2 100644
--- a/packages/cli/src/lib/Config.ts
+++ b/packages/cli/src/lib/Config.ts
@@ -7,10 +7,10 @@ import packageJson from '../../package.json' with { type: 'json' };
 
 const CONFIG_FILE_NAME = '.ai-devkit.json';
 
-function withoutUpdatedAt(config: DevKitConfig): Omit<DevKitConfig, 'updatedAt'> {
-  const { updatedAt, ...meaningfulConfig } = config;
+function stripLegacyUpdatedAt(config: DevKitConfig): DevKitConfig {
+  const { updatedAt, ...configWithoutUpdatedAt } = config as DevKitConfig & { updatedAt?: string };
   void updatedAt;
-  return meaningfulConfig;
+  return configWithoutUpdatedAt;
 }
 
 export class ConfigManager {
@@ -40,8 +40,7 @@ export class ConfigManager {
       version: packageJson.version,
       environments: [],
       phases: [],
-      createdAt: new Date().toISOString(),
-      updatedAt: new Date().toISOString()
+      createdAt: new Date().toISOString()
     };
 
     await fs.writeJson(this.configPath, config, { spaces: 2 });
@@ -54,19 +53,17 @@ export class ConfigManager {
       throw new ConfigNotFoundError('Config file not found. Run ai-devkit init first.');
     }
 
+    const currentConfig = stripLegacyUpdatedAt(config);
     const nextConfig = {
-      ...config,
+      ...currentConfig,
       ...updates
     };
 
-    if (JSON.stringify(withoutUpdatedAt(nextConfig)) === JSON.stringify(withoutUpdatedAt(config))) {
-      return config;
-    }
+    const updated = stripLegacyUpdatedAt(nextConfig);
 
-    const updated = {
-      ...nextConfig,
-      updatedAt: new Date().toISOString()
-    };
+    if (JSON.stringify(updated) === JSON.stringify(config)) {
+      return currentConfig;
+    }
 
     await fs.writeJson(this.configPath, updated, { spaces: 2 });
     return updated;
diff --git a/packages/cli/src/types.ts b/packages/cli/src/types.ts
index 915e26af..05ab7482 100644
--- a/packages/cli/src/types.ts
+++ b/packages/cli/src/types.ts
@@ -34,7 +34,6 @@ export interface DevKitConfig {
   skills?: ConfigSkill[];
   mcpServers?: Record<string, McpServerDefinition>;
   createdAt: string;
-  updatedAt: string;
 }
 
 export interface ConfigSkill {
diff --git a/web/content/docs/11-configuration-file.md b/web/content/docs/11-configuration-file.md
index 3a506fbb..46ffbc14 100644
--- a/web/content/docs/11-configuration-file.md
+++ b/web/content/docs/11-configuration-file.md
@@ -46,8 +46,7 @@ Use this page as a reference for fields inside `.ai-devkit.json`. In most cases,
       "args": ["-y", "@ai-devkit/memory"]
     }
   },
-  "createdAt": "2025-12-28T13:35:45.251Z",
-  "updatedAt": "2026-04-18T10:00:00.000Z"
+  "createdAt": "2025-12-28T13:35:45.251Z"
 }
 ```
 
@@ -230,11 +229,11 @@ Every server definition requires a `transport` field set to `stdio`, `http`, or
 **Set by:** `ai-devkit init --template` or by editing `.ai-devkit.json` directly
 **Read by:** `ai-devkit install`
 
-#### `createdAt` / `updatedAt`
+#### `createdAt`
 
 - **Type:** `string` (ISO 8601 timestamp)
-- **Set automatically** when the config is created or modified.
-- You normally should not edit these fields manually.
+- **Set automatically** when the config is created.
+- You normally should not edit this field manually.
 
 ## Global Config (`~/.ai-devkit/.ai-devkit.json`)
 

From 10b5eafb244ab3049173828e642fe74fc2d83e8d Mon Sep 17 00:00:00 2001
From: Hoang Nguyen <hoangnn93@gmail.com>
Date: Sat, 27 Jun 2026 14:29:46 +0000
Subject: [PATCH 3/3] Preserve legacy updatedAt on no-op config updates

---
 packages/cli/src/__tests__/lib/Config.test.ts | 16 +++-------------
 packages/cli/src/lib/Config.ts                | 15 +++------------
 2 files changed, 6 insertions(+), 25 deletions(-)

diff --git a/packages/cli/src/__tests__/lib/Config.test.ts b/packages/cli/src/__tests__/lib/Config.test.ts
index e0f61ddf..9abb6d46 100644
--- a/packages/cli/src/__tests__/lib/Config.test.ts
+++ b/packages/cli/src/__tests__/lib/Config.test.ts
@@ -181,7 +181,7 @@ describe('ConfigManager', () => {
       expect(mockFs.writeJson).not.toHaveBeenCalled();
     });
 
-    it('should remove legacy updatedAt when updating config', async () => {
+    it('should not rewrite config when only legacy updatedAt is present and updates are unchanged', async () => {
       const existingConfig = {
         version: '1.0.0',
         environments: ['cursor'],
@@ -192,21 +192,11 @@ describe('ConfigManager', () => {
 
       (mockFs.pathExists as any).mockResolvedValue(true);
       (mockFs.readJson as any).mockResolvedValue(existingConfig);
-      (mockFs.writeJson as any).mockResolvedValue(undefined);
 
       const result = await configManager.update({});
 
-      expect(result).not.toHaveProperty('updatedAt');
-      expect(mockFs.writeJson).toHaveBeenCalledWith(
-        '/test/dir/.ai-devkit.json',
-        {
-          version: '1.0.0',
-          environments: ['cursor'],
-          phases: [],
-          createdAt: '2024-01-01T00:00:00.000Z'
-        },
-        { spaces: 2 }
-      );
+      expect(result).toEqual(existingConfig);
+      expect(mockFs.writeJson).not.toHaveBeenCalled();
     });
 
     it('should throw error when config file not found', async () => {
diff --git a/packages/cli/src/lib/Config.ts b/packages/cli/src/lib/Config.ts
index 8d84e7b2..9e41b093 100644
--- a/packages/cli/src/lib/Config.ts
+++ b/packages/cli/src/lib/Config.ts
@@ -7,12 +7,6 @@ import packageJson from '../../package.json' with { type: 'json' };
 
 const CONFIG_FILE_NAME = '.ai-devkit.json';
 
-function stripLegacyUpdatedAt(config: DevKitConfig): DevKitConfig {
-  const { updatedAt, ...configWithoutUpdatedAt } = config as DevKitConfig & { updatedAt?: string };
-  void updatedAt;
-  return configWithoutUpdatedAt;
-}
-
 export class ConfigManager {
   private configPath: string;
 
@@ -53,16 +47,13 @@ export class ConfigManager {
       throw new ConfigNotFoundError('Config file not found. Run ai-devkit init first.');
     }
 
-    const currentConfig = stripLegacyUpdatedAt(config);
-    const nextConfig = {
-      ...currentConfig,
+    const updated = {
+      ...config,
       ...updates
     };
 
-    const updated = stripLegacyUpdatedAt(nextConfig);
-
     if (JSON.stringify(updated) === JSON.stringify(config)) {
-      return currentConfig;
+      return config;
     }
 
     await fs.writeJson(this.configPath, updated, { spaces: 2 });