Add qt-development-skills plugin

The amplitude entry used source type "url" which clones the root of
https://github.com/amplitude/mcp-marketplace — a multi-plugin repo
where the actual plugin lives at plugins/amplitude/. Claude Code found
no skills there, so /reload-plugins loaded 0 skills for amplitude.

Switching to "git-subdir" with path "plugins/amplitude" (the same
pattern used by awslabs, bigdata-com, zapier, etc.) makes Claude Code
resolve the correct subdirectory and load all 27 amplitude skills.

Removing the pinned sha so the plugin tracks main, consistent with
how posthog and other unpinned entries behave.

.claude-plugin/marketplace.json

@@ -86,9 +86,10 @@
     {
       "name": "amplitude",
       "source": {
-        "source": "url",
+        "source": "git-subdir",
         "url": "https://github.com/amplitude/mcp-marketplace.git",
-        "sha": "be54ccb66b10593721dd3a31e47b2db20ea02d2f"
+        "path": "plugins/amplitude",
+        "ref": "main"
       },
       "description": "Use Amplitude as an expert analyst — instrument Amplitude, discover product opportunities, analyze charts, create dashboards, manage experiments, and understand users and accounts.",
       "category": "monitoring",
@@ -823,6 +824,22 @@
       "source": "./external_plugins/linear",
       "homepage": "https://github.com/anthropics/claude-plugins-public/tree/main/external_plugins/linear"
     },
+    {
+      "name": "liquid-skills",
+      "description": "Liquid language fundamentals, CSS/JS/HTML coding standards, and WCAG accessibility patterns for Shopify themes",
+      "author": {
+        "name": "Shopify"
+      },
+      "category": "development",
+      "source": {
+        "source": "git-subdir",
+        "url": "https://github.com/Shopify/liquid-skills.git",
+        "path": "plugins/liquid-skills",
+        "ref": "main",
+        "sha": "ae3e4cc3f454923e388bbd841fd931f0c7bf5be4"
+      },
+      "homepage": "https://github.com/Shopify/liquid-skills/tree/main/plugins/liquid-skills"
+    },
     {
       "name": "lua-lsp",
       "description": "Lua language server for code intelligence",
@@ -936,28 +953,8 @@
       "homepage": "https://github.com/netlify/context-and-tools"
     },
     {
-      "name": "netsuite-aiconnector-service-skill",
-      "description": "NetSuite Intelligence skill — teaches AI the correct tool-selection order, output formatting, domain knowledge, multi-subsidiary and currency handling, and SuiteQL safety checklist for any session using the NetSuite AI Service Connector.",
-      "author": {
-        "name": "Oracle NetSuite"
-      },
-      "category": "productivity",
-      "source": {
-        "source": "git-subdir",
-        "url": "https://github.com/oracle/netsuite-suitecloud-sdk.git",
-        "path": "packages/agent-skills",
-        "ref": "master",
-        "sha": "43bacf43763e1eedd0892b4652be3d45df94f0e7"
-      },
-      "homepage": "https://github.com/oracle/netsuite-suitecloud-sdk",
-      "strict": false,
-      "skills": [
-        "./netsuite-ai-connector-instructions"
-      ]
-    },
-    {
-      "name": "netsuite-sdf-roles-and-permissions",
-      "description": "Use when generating or reviewing NetSuite SDF permission configurations — customrole XML, script deployment permissions, permkey values, permlevel choices, run-as role design, and least-privilege access. Confirms exact ADMI_/LIST_/REGT_/REPO_/TRAN_ permission IDs and validates permissions against bundled NetSuite reference data.",
+      "name": "netsuite-suitecloud",
+      "description": "NetSuite agent skills from Oracle — authoring guidance for SuiteCloud Development Framework (SDF) objects and UIF single-page-app components, plus runtime guidance for the NetSuite AI Service Connector.",
       "author": {
         "name": "Oracle NetSuite"
       },
@@ -969,31 +966,13 @@
         "ref": "master",
         "sha": "43bacf43763e1eedd0892b4652be3d45df94f0e7"
       },
-      "homepage": "https://github.com/oracle/netsuite-suitecloud-sdk",
-      "strict": false,
-      "skills": [
-        "./netsuite-sdf-roles-and-permissions"
-      ]
-    },
-    {
-      "name": "netsuite-uif-spa-reference",
-      "description": "Use when building, modifying, or debugging NetSuite UIF SPA components. Provides API/type lookup for @uif-js/core and @uif-js/component — constructors, methods, props, enums, hooks, and component options.",
-      "author": {
-        "name": "Oracle NetSuite"
-      },
-      "category": "development",
-      "source": {
-        "source": "git-subdir",
-        "url": "https://github.com/oracle/netsuite-suitecloud-sdk.git",
-        "path": "packages/agent-skills",
-        "ref": "master",
-        "sha": "43bacf43763e1eedd0892b4652be3d45df94f0e7"
-      },
-      "homepage": "https://github.com/oracle/netsuite-suitecloud-sdk",
       "strict": false,
       "skills": [
+        "./netsuite-ai-connector-instructions",
+        "./netsuite-sdf-roles-and-permissions",
         "./netsuite-uif-spa-reference"
-      ]
+      ],
+      "homepage": "https://github.com/oracle/netsuite-suitecloud-sdk"
     },
     {
       "name": "nightvision",
@@ -1236,6 +1215,20 @@
       },
       "homepage": "https://github.com/qodo-ai/qodo-skills.git"
     },
+    {
+      "name": "qt-development-skills",
+      "description": "Agentic engineering skills for Qt software development — Qt C++/QML code review, QML coding, and Qt C++/QML code documentation.",
+      "author": {
+        "name": "Qt Group"
+      },
+      "category": "development",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/TheQtCompanyRnD/agent-skills.git",
+        "sha": "62a98e2339e6eefcff108cfc3fe9db8a7301856c"
+      },
+      "homepage": "https://www.qt.io/"
+    },
     {
       "name": "railway",
       "description": "Deploy and manage apps, databases, and infrastructure on Railway. Covers project setup, deploys, environment configuration, networking, troubleshooting, and monitoring.",