fix: install Codex skills to ~/.agents/skills/ per official docs

Codex discovers user-level skills at $HOME/.agents/skills/, not
~/.codex/skills/. Updated install path and added cleanup of old location.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

installer/src/agents/codex.ts

@@ -12,6 +12,7 @@ export const codexAgent: AgentConfig = {
     return fs.existsSync(path.join(os.homedir(), '.codex')) || await commandExists('codex');
   },
   getSkillPath: () => {
-    return path.join(os.homedir(), '.codex', 'skills');
+    // Codex user-level skills path per docs: $HOME/.agents/skills
+    return path.join(os.homedir(), '.agents', 'skills');
   },
 };

installer/src/index.ts

@@ -3,6 +3,8 @@
 import { Command } from 'commander';
 import inquirer from 'inquirer';
 import ora from 'ora';
+import path from 'path';
+import os from 'os';
 import chalk from 'chalk';
 import { createRequire } from 'module';
 import { checkNodeVersion, checkCargo, checkSyncCtl } from './prerequisites/check.js';
@@ -248,6 +250,8 @@ program
             break;
           case 'codex':
             removeSyncableSkills(dest, 'syncable-*');
+            // Also clean old location (~/.codex/skills/)
+            removeSyncableSkills(path.join(os.homedir(), '.codex', 'skills'), 'syncable-*');
             break;
           case 'cursor':
             removeSyncableSkills(dest, 'syncable-*.mdc');