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

@@ -131,9 +131,9 @@
       "pluginName": "taste-skill",
       "repo": "https://github.com/Leonxlnx/taste-skill.git",
       "ref": "main",
-      "adapter": "skill-collection",
+      "adapter": "codex-plugin",
       "commit": "12af471f627f866411b4bd785b19646d3672784c",
-      "syncedAt": "2026-10-25T16:00:00Z"
+      "syncedAt": "2026-10-27T07:59:48Z"
     },
     {
       "id": "shadcn",