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": "15581d14007fd01fb3f132016741962f34936ca2",
+  "commit": "4df4b03ba538751131d24415c59a1fad0d8c2c18",
   "adapter": "codex-plugin",
   "sourcePath": "plugins/caveman",
-  "syncedAt": "2026-09-10T23:13:42Z"
+  "syncedAt": "2026-09-15T06:47:43Z"
 }