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/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "09170eec67eefd46a7ae85de61b40c194020f997",
-      "syncedAt": "2026-09-27T16:00:00Z"
+      "commit": "477bcb28c9812b385cb51a4605ddf30d7b2266e2",
+      "syncedAt": "2026-10-04T16:00:00Z"
     },
     {
       "id": "caveman",
@@ -24,8 +24,8 @@
       "repo": "https://github.com/JuliusBrussee/caveman.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "aeb45e2f787c0757a8af383a291a280cb6aeb4c1",
-      "syncedAt": "2026-10-03T16:00:00Z"
+      "commit": "6571943370f7c9d4de1946481177ee7b306cd8e8",
+      "syncedAt": "2026-10-04T16:00:00Z"
     },
     {
       "id": "taste-skill",
@@ -87,8 +87,8 @@
       "repo": "https://github.com/mattpocock/skills.git",
       "ref": "main",
       "adapter": "skill-collection",
-      "commit": "d81f3a183412e71a5b1e84ca21bc1a35eea03a60",
-      "syncedAt": "2026-09-29T16:00:00Z"
+      "commit": "24fe0ef7737efae15c87225755e9f6f5965e4888",
+      "syncedAt": "2026-10-04T16:00:00Z"
     },
     {
       "id": "updating-gitea-repositories",
@@ -168,8 +168,8 @@
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "2d5a45a578af9fb215a515829a8ae7fd14352a78",
-      "syncedAt": "2026-10-03T16:00:00Z"
+      "commit": "ba80ee48fc319735151c3ad6d9bb9a8180c9f09e",
+      "syncedAt": "2026-10-04T16:00:00Z"
     },
     {
       "id": "shuorenhua",