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

@@ -69,8 +69,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "3ba91b1cc83e1bbe4ab35a422ff2a694849c5048",
-      "syncedAt": "2026-09-08T16:00:01Z"
+      "commit": "2b3e6d4f8d9161fe5c19340dc383aade392012dd",
+      "syncedAt": "2026-09-14T15:59:59Z"
     },
     {
       "id": "frontend-slides",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/lewislulu/html-ppt-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "f3a8435d3901697d5ac5e64d356c933637e43107",
-      "syncedAt": "2026-06-11T03:57:53Z"
+      "commit": "fd1629067909ff55b36b905476de4e5f26062a1f",
+      "syncedAt": "2026-09-14T15:59:59Z"
     },
     {
       "id": "ppt-master",
@@ -105,8 +105,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "b3073f8fcf5d2ebeda621a424097dde9dd771cea",
-      "syncedAt": "2026-09-11T16:00:01Z"
+      "commit": "c6ae4896da10497464ad7e87f5833bfc14321621",
+      "syncedAt": "2026-09-14T15:59:59Z"
     },
     {
       "id": "grill-me",
@@ -141,8 +141,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "d155ba9ebfffe4742efefda8d68c2e0e8e490924",
-      "syncedAt": "2026-09-11T16:00:01Z"
+      "commit": "3dc93da27e29048d601546ed610c903705f7fd6c",
+      "syncedAt": "2026-09-14T15:59:59Z"
     },
     {
       "id": "shuorenhua",
@@ -150,8 +150,8 @@
       "repo": "https://github.com/MrGeDiao/shuorenhua.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "d2d0ce27da295581c3cf87a30ab65deb7d0ddfb8",
-      "syncedAt": "2026-09-03T02:45:43Z"
+      "commit": "5a9eafefe03807404135f4d2ee4f42fe61d58759",
+      "syncedAt": "2026-09-14T15:59:59Z"
     }
   ]
 }