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

@@ -42,8 +42,8 @@
       "repo": "https://github.com/JuliusBrussee/caveman.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "766dce6b1394ebb56a3090748d5a0240a5aefb36",
-      "syncedAt": "2026-08-17T16:00:00Z"
+      "commit": "ae405e872270acc57484693612ae038b16c8f6cd",
+      "syncedAt": "2026-08-18T16:00:00Z"
     },
     {
       "id": "taste-skill",
@@ -51,8 +51,8 @@
       "repo": "https://github.com/Leonxlnx/taste-skill.git",
       "ref": "main",
       "adapter": "skill-collection",
-      "commit": "e988add20dab0fa97d7a76781c48961c8184288e",
-      "syncedAt": "2026-07-24T06:18:20Z"
+      "commit": "dfb6f9f9e93a39f673b1827c0889cc28326d1800",
+      "syncedAt": "2026-08-18T16:00:00Z"
     },
     {
       "id": "shadcn",
@@ -60,8 +60,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "8a7701ec27eb9cb8e0377db769fbe6d744113c52",
-      "syncedAt": "2026-08-17T16:00:00Z"
+      "commit": "5c8f5b06746ac445e97a50cbeb63253d657d7541",
+      "syncedAt": "2026-08-18T16:00:00Z"
     },
     {
       "id": "frontend-slides",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "3b01e0cbe63c0dba316298e2d0aa6a09c4f3ef2d",
-      "syncedAt": "2026-08-17T16:00:00Z"
+      "commit": "2f6a06ce34365a999de1a34e13c1784a48d4f7d3",
+      "syncedAt": "2026-08-18T16:00:00Z"
     },
     {
       "id": "grill-me",
@@ -114,8 +114,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "10439f3c6f058794f7d395dc347663271bf780ce",
-      "syncedAt": "2026-08-17T16:00:00Z"
+      "commit": "b18acf67128591337eb8e50d07ba20cbbb239f34",
+      "syncedAt": "2026-08-18T16:00:00Z"
     }
   ]
 }