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": "12aa8cc0e980b6d3310a5be4f477c434da51f4b0",
+  "commit": "766dce6b1394ebb56a3090748d5a0240a5aefb36",
   "adapter": "codex-plugin",
   "sourcePath": "plugins/caveman",
-  "syncedAt": "2026-08-15T16:00:01Z"
+  "syncedAt": "2026-08-17T16:00:00Z"
 }