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": "613d7f0402fb51bdde0edb6b01853b391a06b765",
-      "syncedAt": "2026-08-13T08:38:10Z"
+      "commit": "c72984e4392c7a154e55c11dbf445f01ce5c35d4",
+      "syncedAt": "2026-08-13T15:59:59Z"
     },
     {
       "id": "taste-skill",
@@ -60,8 +60,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "a85299a9edd2a961e32f01ced86963a852652bd2",
-      "syncedAt": "2026-08-13T08:38:10Z"
+      "commit": "dec288ed71d60f6cb090f60f94bc648eaf1c528b",
+      "syncedAt": "2026-08-13T15:59:59Z"
     },
     {
       "id": "frontend-slides",
@@ -96,8 +96,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "bcc5762d6c770025f37ca459f5d9ea96f1783fc1",
-      "syncedAt": "2026-08-13T08:38:10Z"
+      "commit": "e8323bfaee249cffe1301ec40fca5875eb544d46",
+      "syncedAt": "2026-08-13T15:59:59Z"
     },
     {
       "id": "grill-me",
@@ -105,8 +105,8 @@
       "repo": "https://github.com/mattpocock/skills.git",
       "ref": "main",
       "adapter": "skill-collection",
-      "commit": "84fdeffd12f2ee307994d1eb6feb48173b6e0502",
-      "syncedAt": "2026-08-13T08:38:10Z"
+      "commit": "8b78b531ab965735c5dc74f6f7a219e1e37326df",
+      "syncedAt": "2026-08-13T15:59:59Z"
     },
     {
       "id": "next-skills",
@@ -114,8 +114,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "fef4c28bba9f080fce9687a7a8ee7ac3784de57e",
-      "syncedAt": "2026-08-13T08:38:10Z"
+      "commit": "9e1a290955a9177a97a1d44f5305b1236410216a",
+      "syncedAt": "2026-08-13T15:59:59Z"
     }
   ]
 }