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.

plugins/codex/plugins/caveman/THIRD_PARTY_SOURCE.json

@@ -2,8 +2,8 @@
   "sourceId": "caveman",
   "repo": "https://github.com/JuliusBrussee/caveman.git",
   "ref": "main",
-  "commit": "f5d729488caa8f6a5b6c8086fe2cccd3e8a63f91",
+  "commit": "b39c90862855ad2f0813ce775b8bf07a9d6d2a50",
   "adapter": "codex-plugin",
   "sourcePath": "plugins/caveman",
-  "syncedAt": "2026-10-01T16:00:00Z"
+  "syncedAt": "2026-10-02T16:00:00Z"
 }