refactor: convert skills to plugins and set up marketplace

- Move all 4 skills (copilot-cli-configurator, create-extension,
  mcp-builder, skill-creator) into plugins/ with plugin.json manifests
- Add .github/plugin/marketplace.json for pgZack/copilot-cli-things
- Add plugin.json to hookify and plugin-dev
- Update README with marketplace install instructions and plugin table
- Fix configurator: complete agent loading order, add missing hook triggers
- Fix mcp-builder: replace math-only example-evaluation.xml with
  realistic MCP tool-calling QA pairs
- Fix skill-creator: correct generate_review.py docstring,
  add eval_name extraction in aggregate_benchmark.py
- Remove stale __pycache__ files

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Poorgramer-Zack

.github/plugin/marketplace.json

@@ -0,0 +1,60 @@
+{
+  "name": "copilot-cli-things",
+  "owner": {
+    "name": "pgZack"
+  },
+  "metadata": {
+    "description": "Curated plugins and extensions for GitHub Copilot CLI",
+    "version": "0.1.0"
+  },
+  "plugins": [
+    {
+      "name": "hookify",
+      "description": "Create custom hooks from conversation analysis or explicit rules — lightweight markdown-based pattern matching with warn/block actions",
+      "version": "0.1.0",
+      "source": "./plugins/hookify",
+      "keywords": ["hooks", "guardrails", "patterns", "rules"],
+      "category": "safety"
+    },
+    {
+      "name": "plugin-dev",
+      "description": "Plugin development toolkit — 7 specialized skills covering hooks, MCP integration, agents, settings, structure, and distribution",
+      "version": "0.1.0",
+      "source": "./plugins/plugin-dev",
+      "keywords": ["plugin", "development", "toolkit", "scaffold"],
+      "category": "development"
+    },
+    {
+      "name": "copilot-cli-configurator",
+      "description": "Configure Copilot CLI — custom instructions, hooks, MCP servers, custom agents, plugins, extensions, and loading order",
+      "version": "0.1.0",
+      "source": "./plugins/copilot-cli-configurator",
+      "keywords": ["config", "setup", "instructions", "hooks", "mcp", "agents"],
+      "category": "configuration"
+    },
+    {
+      "name": "create-extension",
+      "description": "Build Copilot CLI extensions — extension.mjs, hooks, tools, events, SDK API, JSON-RPC lifecycle",
+      "version": "0.1.0",
+      "source": "./plugins/create-extension",
+      "keywords": ["extension", "sdk", "tools", "hooks", "events"],
+      "category": "development"
+    },
+    {
+      "name": "mcp-builder",
+      "description": "Build and test MCP servers in TypeScript or Python — tool design, schemas, transports, evaluation",
+      "version": "0.1.0",
+      "source": "./plugins/mcp-builder",
+      "keywords": ["mcp", "server", "typescript", "python", "tools"],
+      "category": "development"
+    },
+    {
+      "name": "skill-creator",
+      "description": "Skill development lifecycle — create, edit, test, benchmark, and optimize SKILL.md files with evals",
+      "version": "0.1.0",
+      "source": "./plugins/skill-creator",
+      "keywords": ["skill", "eval", "benchmark", "testing", "development"],
+      "category": "development"
+    }
+  ]
+}

README.md

@@ -1,6 +1,6 @@
 # copilot-cli-things
 
-A curated collection of plugins and extensions for [GitHub Copilot CLI](https://docs.github.com/copilot/concepts/agents/about-copilot-cli).
+A curated collection of extensions, skills, and plugins for [GitHub Copilot CLI](https://docs.github.com/copilot/concepts/agents/about-copilot-cli).
 
 ## Extensions
 
@@ -25,21 +25,34 @@ cp -r extensions/<name> ~/.copilot/extensions/
 
 Restart Copilot CLI or run `/clear` to load.
 
+## Skills
+
+All skills are distributed as plugins via this marketplace.
+
 ## Plugins
 
 Plugins bundle agents, skills, hooks, and MCP configs into distributable packages.
 
+| Plugin | Category | Description |
+|--------|----------|-------------|
+| [hookify](plugins/hookify/) | safety | Markdown-based hook creation — regex patterns with warn/block actions |
+| [plugin-dev](plugins/plugin-dev/) | development | Plugin development toolkit — hooks, MCP, agents, settings, structure |
+| [copilot-cli-configurator](plugins/copilot-cli-configurator/) | configuration | Configure custom instructions, hooks, MCP servers, agents, plugins, extensions |
+| [create-extension](plugins/create-extension/) | development | Build extensions — SDK API, tools, hooks, events, JSON-RPC lifecycle |
+| [mcp-builder](plugins/mcp-builder/) | development | Build and test MCP servers in TypeScript or Python |
+| [skill-creator](plugins/skill-creator/) | development | Skill development lifecycle — create, test, benchmark, optimize |
+
 ### Install from This Marketplace
 
 ```bash
-# Register this marketplace
-copilot plugin marketplace add Poorgramer-Zack/copilot-cli-things
+# Register the marketplace
+copilot plugin marketplace add pgZack/copilot-cli-things
 
 # Browse available plugins
 copilot plugin marketplace browse copilot-cli-things
 
 # Install a plugin
-copilot plugin install <plugin-name>@copilot-cli-things
+copilot plugin install hookify@copilot-cli-things
 ```
 
 ## Contributing
@@ -53,8 +66,8 @@ copilot plugin install <plugin-name>@copilot-cli-things
 ### Add a Plugin
 
 1. Create a directory under `plugins/<name>/`
-2. Add `plugin.json` manifest and plugin components (agents, skills, hooks, etc.)
-3. Register it in `.github/plugin/marketplace.json`
+2. Add plugin components in conventionally named subdirectories (`agents/`, `skills/`, `hooks/`, `mcp/`, etc.)
+3. Add a `README.md` describing the plugin
 4. Submit a PR
 
 ## License

plugins/copilot-cli-configurator/plugin.json

@@ -0,0 +1,12 @@
+{
+  "name": "copilot-cli-configurator",
+  "description": "Configure Copilot CLI — custom instructions, hooks, MCP servers, custom agents, plugins, extensions, and loading order",
+  "version": "0.1.0",
+  "author": {
+    "name": "pgZack"
+  },
+  "license": "MIT",
+  "keywords": ["config", "setup", "instructions", "hooks", "mcp", "agents"],
+  "category": "configuration",
+  "skills": "skills/"
+}