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": "11ddc0c9813c8f75365cd5be2f753df08712f154",
-      "syncedAt": "2026-08-08T16:00:01Z"
+      "commit": "b2ca50b8809d4dbc9f664b398938fddede320001",
+      "syncedAt": "2026-08-11T16:00:01Z"
     },
     {
       "id": "taste-skill",
@@ -60,8 +60,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "deda4df80fb350230b2fce2b575e769a90cae076",
-      "syncedAt": "2026-08-10T15:59:59Z"
+      "commit": "41bbc12cfd39ed8d9cb8da04275479ee7ecc0612",
+      "syncedAt": "2026-08-11T16:00:01Z"
     },
     {
       "id": "frontend-slides",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "182c6b8229a44990cdc5b394545f90992be377d6",
-      "syncedAt": "2026-08-10T15:59:59Z"
+      "commit": "4e6ecbcb0dc079efebd3c79b775c0f02581509fe",
+      "syncedAt": "2026-08-11T16:00:01Z"
     },
     {
       "id": "next-skills",
@@ -105,8 +105,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "1722e45c3957d1e6ce2aaff482a9b9ece28864a1",
-      "syncedAt": "2026-08-10T15:59:59Z"
+      "commit": "bbec4fe2bd7222aaa9b4de58269d821ab128fab8",
+      "syncedAt": "2026-08-11T16:00:01Z"
     }
   ]
 }