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": "ec83e5bace4c20484d704dea21e12fc4eb94e9aa",
-      "syncedAt": "2026-08-06T16:00:02Z"
+      "commit": "11ddc0c9813c8f75365cd5be2f753df08712f154",
+      "syncedAt": "2026-08-08T16:00:01Z"
     },
     {
       "id": "taste-skill",
@@ -60,8 +60,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "9846e22ce52c723554742860a0dbd3e5cf19b573",
-      "syncedAt": "2026-08-06T16:00:02Z"
+      "commit": "6261bd89f72d794aea491482cc2acfd8dc3d63e2",
+      "syncedAt": "2026-08-08T16:00:01Z"
     },
     {
       "id": "frontend-slides",
@@ -78,8 +78,8 @@
       "repo": "https://github.com/op7418/guizang-ppt-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "e8357b315471f04e17551988826011974bfff779",
-      "syncedAt": "2026-08-06T16:00:02Z"
+      "commit": "c91369c449d34755d320a8b81d0734000d99d1ab",
+      "syncedAt": "2026-08-08T16:00:01Z"
     },
     {
       "id": "html-ppt",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "c0305342cf5c558e7242dba64cfc207874a5134a",
-      "syncedAt": "2026-08-06T16:00:02Z"
+      "commit": "eb095bfcc6b625fd8754e9f5d053ec4220865370",
+      "syncedAt": "2026-08-08T16:00:01Z"
     },
     {
       "id": "next-skills",
@@ -105,8 +105,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "0ae8c72462952df163f1b1e0726641bc5b40dc93",
-      "syncedAt": "2026-08-06T16:00:02Z"
+      "commit": "a677cf66af002fbdcf49a982ef435b03554817cc",
+      "syncedAt": "2026-08-08T16:00:01Z"
     }
   ]
 }