Remove collections folder and migrate remaining references to plugins

- Remove rug-agentic-workflow collection files (already migrated to plugin)
- Remove collections.instructions.md (no longer applicable)
- Remove suggest-awesome-github-copilot-collections prompt and plugin command
- Update awesome-copilot plugin.json to reference skills prompt instead of collections
- Update contributor-report.mjs to track plugins instead of collections
- Remove unused collection constants from constants.mjs
- Update rug-agentic-workflow plugin.json with tags and items from collection
- Regenerate README docs and marketplace.json

plugins/awesome-copilot/.github/plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "awesome-copilot",
-  "description": "Meta prompts that help you discover and generate curated GitHub Copilot agents, collections, instructions, prompts, and skills.",
+  "description": "Meta prompts that help you discover and generate curated GitHub Copilot agents, instructions, prompts, and skills.",
   "version": "1.0.0",
   "author": {
     "name": "Awesome Copilot Community"
@@ -21,7 +21,7 @@
   },
   "items": [
     {
-      "path": "prompts/suggest-awesome-github-copilot-collections.prompt.md",
+      "path": "prompts/suggest-awesome-github-copilot-skills.prompt.md",
       "kind": "prompt"
     },
     {

plugins/awesome-copilot/commands/suggest-awesome-github-copilot-collections.md

@@ -1 +0,0 @@
-../../../prompts/suggest-awesome-github-copilot-collections.prompt.md

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

@@ -6,5 +6,27 @@
     "name": "Awesome Copilot Community"
   },
   "repository": "https://github.com/github/awesome-copilot",
-  "license": "MIT"
+  "license": "MIT",
+  "tags": [
+    "agentic-workflow",
+    "orchestration",
+    "subagents",
+    "software-engineering",
+    "qa"
+  ],
+  "items": [
+    {
+      "path": "agents/rug-orchestrator.agent.md",
+      "kind": "agent",
+      "usage": "recommended\n\nThis workflow is designed as a coordinated trio:\n- `RUG` orchestrates decomposition, delegation, and validation loops.\n- `SWE` executes implementation tasks.\n- `QA` validates requirements, edge cases, and regressions.\n\nTypical usage:\n1. Start with `RUG` for multi-step tasks.\n2. Let `RUG` delegate coding to `SWE`.\n3. Let `RUG` delegate verification to `QA`.\n\nBest results:\n- Keep each delegated task narrowly scoped.\n- Require explicit acceptance criteria per task.\n- Run a final cross-task validation pass before completion."
+    },
+    {
+      "path": "agents/swe-subagent.agent.md",
+      "kind": "agent"
+    },
+    {
+      "path": "agents/qa-subagent.agent.md",
+      "kind": "agent"
+    }
+  ]
 }