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

@@ -24,8 +24,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "9a863a527534eeff97cad45430b8e5678ab45c40",
-      "syncedAt": "2026-06-22T16:00:01Z"
+      "commit": "a13b2a02fd58d8ad325fefd9d146f62708be8456",
+      "syncedAt": "2026-06-24T03:56:08Z"
     },
     {
       "id": "shadcn",
@@ -33,8 +33,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "70a7a0c2a8271ccde9932fb40d5b4adeacb9b131",
-      "syncedAt": "2026-06-21T16:00:01Z"
+      "commit": "b59f68ecc5216e39d3f492e79b9767388ccd43db",
+      "syncedAt": "2026-06-24T03:56:08Z"
     },
     {
       "id": "frontend-slides",
@@ -42,8 +42,8 @@
       "repo": "https://github.com/zarazhangrui/frontend-slides.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "c28690100a289d979e5e032b44771a7c28a86e40",
-      "syncedAt": "2026-06-13T16:00:00Z"
+      "commit": "9906a34d640d2111f724544cbc50f7f130569ae1",
+      "syncedAt": "2026-06-24T03:56:08Z"
     },
     {
       "id": "guizang-ppt-skill",
@@ -69,17 +69,17 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "bf9ae01a8df43b1a86f459ed007e84ef465ae257",
-      "syncedAt": "2026-06-22T16:00:01Z"
+      "commit": "54ef7c733480ca44061fc76d6d29dcf2227ecd67",
+      "syncedAt": "2026-06-24T03:56:08Z"
     },
     {
       "id": "next-skills",
       "pluginName": "next-skills",
-      "repo": "https://github.com/vercel-labs/next-skills.git",
-      "ref": "main",
+      "repo": "https://github.com/vercel/next.js.git",
+      "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "dc1de9caf7612d73f56a8dec3cb1bd6c9ec096b9",
-      "syncedAt": "2026-06-15T08:24:34Z"
+      "commit": "16db9d05442fc1521c02e6690599aa89da0df0ec",
+      "syncedAt": "2026-06-24T03:48:19Z"
     }
   ]
 }