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

@@ -42,8 +42,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "7f69fed6a2717900085f1bc3b263721f8ba025e2",
-      "syncedAt": "2026-09-10T23:40:59Z"
+      "commit": "d8ce090f82580c68f5471cc6dd3f56faf9a37afb",
+      "syncedAt": "2026-09-15T06:47:43Z"
     },
     {
       "id": "caveman",
@@ -51,8 +51,8 @@
       "repo": "https://github.com/JuliusBrussee/caveman.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "15581d14007fd01fb3f132016741962f34936ca2",
-      "syncedAt": "2026-09-10T23:13:42Z"
+      "commit": "4df4b03ba538751131d24415c59a1fad0d8c2c18",
+      "syncedAt": "2026-09-15T06:47:43Z"
     },
     {
       "id": "taste-skill",
@@ -105,8 +105,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "c6ae4896da10497464ad7e87f5833bfc14321621",
-      "syncedAt": "2026-09-14T15:59:59Z"
+      "commit": "7879bbc811f86ed9e43df0053169d885cff942c7",
+      "syncedAt": "2026-09-15T06:47:43Z"
     },
     {
       "id": "grill-me",
@@ -135,14 +135,23 @@
       "commit": "20c0de9b3829534685d1f931dc0b574c988eec6b",
       "syncedAt": "2026-09-10T23:40:59Z"
     },
+    {
+      "id": "hardware-development",
+      "pluginName": "hardware-development",
+      "repo": "https://git.playones.com/xufeng/hardware-development.git",
+      "ref": "v1.0.0",
+      "adapter": "claude-skill",
+      "commit": "bb7491d3f3a188389c22995316ae0a257177a077",
+      "syncedAt": "2026-09-15T06:47:43Z"
+    },
     {
       "id": "next-skills",
       "pluginName": "next-skills",
       "repo": "https://github.com/vercel/next.js.git",
       "ref": "canary",
       "adapter": "skill-collection",
-      "commit": "3dc93da27e29048d601546ed610c903705f7fd6c",
-      "syncedAt": "2026-09-14T15:59:59Z"
+      "commit": "85e574a682254a835b9fbdb61530e555cd2d12c6",
+      "syncedAt": "2026-09-15T06:47:43Z"
     },
     {
       "id": "shuorenhua",