Sync third-party and MCP marketplace plugins

Constraint: Public skills are published only by explicit administrator action unless they are tracked third-party market sources.
Confidence: high
Scope-risk: narrow
Directive: Keep private/internal skills out of the public marketplace and preserve normal incremental market Git history.
Tested: Marketplace validation passed.

config/external-sources.lock.json

@@ -33,8 +33,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "e4f45473691e4b389519ee4bc359a3d6df666c26",
-      "syncedAt": "2026-08-26T16:00:00Z"
+      "commit": "8bd29e775453ebcae52b6e6514fbf134df0c5770",
+      "syncedAt": "2026-08-27T16:00:00Z"
     },
     {
       "id": "caveman",
@@ -42,8 +42,8 @@
       "repo": "https://github.com/JuliusBrussee/caveman.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "81536f57b3303b7de7f5bc5b564cc344f9112d68",
-      "syncedAt": "2026-08-25T16:00:00Z"
+      "commit": "17f9f2ec2377b0bfe16b52ee03a462e7f0a02bc8",
+      "syncedAt": "2026-08-27T16:00:00Z"
     },
     {
       "id": "taste-skill",
@@ -114,8 +114,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "94327e8ade8dedd70a0d007d6a49ace64b75ed70",
-      "syncedAt": "2026-08-26T16:00:00Z"
+      "commit": "0a2bd1d531595b1d6d115c2c912f897e9053d3b8",
+      "syncedAt": "2026-08-27T16:00:00Z"
     }
   ]
 }