feat: generate a plugin for the rug agentic workflow

plugins/rug-agentic-workflow/.github/plugin/plugin.json

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+{
+  "name": "rug-agentic-workflow",
+  "description": "Three-agent workflow for orchestrated software delivery with an orchestrator plus implementation and QA subagents.",
+  "version": "1.0.0",
+  "author": {
+    "name": "Awesome Copilot Community"
+  },
+  "repository": "https://github.com/github/awesome-copilot",
+  "license": "MIT"
+}

plugins/rug-agentic-workflow/README.md

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+# RUG Agentic Workflow Plugin
+
+Three-agent workflow for orchestrated software delivery with an orchestrator plus implementation and QA subagents.
+
+## Installation
+
+```bash
+# Using Copilot CLI
+copilot plugin install rug-agentic-workflow@awesome-copilot
+```
+
+## What's Included
+
+### Agents
+
+| Agent | Description |
+|-------|-------------|
+| `rug-orchestrator` | Pure orchestration agent that decomposes requests, delegates all work to subagents, validates outcomes, and repeats until complete. |
+| `swe-subagent` | Senior software engineer subagent for implementation tasks: feature development, debugging, refactoring, and testing. |
+| `qa-subagent` | Meticulous QA subagent for test planning, bug hunting, edge-case analysis, and implementation verification. |
+
+## Source
+
+This plugin is part of [Awesome Copilot](https://github.com/github/awesome-copilot), a community-driven collection of GitHub Copilot extensions.
+
+## License
+
+MIT

plugins/rug-agentic-workflow/agents/qa-subagent.md

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+../../../agents/qa-subagent.agent.md

plugins/rug-agentic-workflow/agents/rug-orchestrator.md

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+../../../agents/rug-orchestrator.agent.md

plugins/rug-agentic-workflow/agents/swe-subagent.md

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+../../../agents/swe-subagent.agent.md