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

@@ -15,8 +15,8 @@
       "repo": "https://github.com/Nutlope/hallmark.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "4f6a46c6dc325d40ab268c93e25c7b96676ebccd",
-      "syncedAt": "2026-10-30T16:00:00Z"
+      "commit": "52328cb3129135499e4e178d4864ee90029dea2b",
+      "syncedAt": "2026-11-03T16:00:00Z"
     },
     {
       "id": "docx",
@@ -60,8 +60,8 @@
       "repo": "https://github.com/vercel-labs/skills.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "92a9a34ac3bf88e695e468b90c7bf32f163d32c8",
-      "syncedAt": "2026-10-29T16:00:00Z"
+      "commit": "7a5e920bead4b1039a6d6df5d7e1163b7b09423a",
+      "syncedAt": "2026-11-03T16:00:00Z"
     },
     {
       "id": "generate-agents-md",
@@ -123,8 +123,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "3a13158ff1f32156cbe144108de48eda2ecaed9a",
-      "syncedAt": "2026-11-01T16:00:00Z"
+      "commit": "713eef51b04efc98d6fa565323b495f7c9c89fd4",
+      "syncedAt": "2026-11-03T16:00:00Z"
     },
     {
       "id": "superpowers-zh",
@@ -195,8 +195,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "5e8856be0da8e6bc85c4aa28acc614478f7b7137",
-      "syncedAt": "2026-10-30T16:00:00Z"
+      "commit": "4a68cddaf40dc87891e6b64c6a69ef46adc1110c",
+      "syncedAt": "2026-11-03T16:00:00Z"
     },
     {
       "id": "grill-me",
@@ -276,8 +276,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "ddb5b04950f776e155f19ed504648b4d5bd6d332",
-      "syncedAt": "2026-11-02T16:00:00Z"
+      "commit": "4c3f5618ffdcd08e33693a1b25d47a4ef1254d90",
+      "syncedAt": "2026-11-03T16:00:00Z"
     },
     {
       "id": "shuorenhua",