[dotnet-ai] Plugin scaffold

[luisquintanilla]

Parent Issue

Part of the dotnet-ai plugin proposal: #225

Summary

Add the dotnet-ai plugin scaffold to the repository. This creates the directory structure, plugin manifest, CODEOWNERS entry, and marketplace.json registration — establishing the plugin so that subsequent skill PRs have a home.

Deliverables

plugins/dotnet-ai/
  plugin.json
  agents/.gitkeep
  skills/.gitkeep
tests/dotnet-ai/.gitkeep

Updates to existing files:

• .claude-plugin/marketplace.json — add dotnet-ai plugin entry
• .github/CODEOWNERS — add ownership entries for plugins/dotnet-ai/ and tests/dotnet-ai/

plugin.json

{
  "name": "dotnet-ai",
  "version": "0.1.0",
  "description": "AI and ML skills for .NET: technology selection, LLM integration, ML.NET, vector search, RAG, ONNX inference, and agentic workflows.",
  "skills": "./skills/",
  "agents": "./agents/"
}

marketplace.json Addition

{
  "name": "dotnet-ai",
  "source": "./plugins/dotnet-ai",
  "description": "AI and ML skills for .NET: technology selection, LLM integration, ML.NET, vector search, RAG, ONNX inference, and agentic workflows."
}

Dependencies

None — this is the first PR and unblocks all subsequent skill PRs.

Acceptance Criteria

• plugins/dotnet-ai/plugin.json exists and is valid JSON
• plugins/dotnet-ai/agents/ and plugins/dotnet-ai/skills/ directories exist
• tests/dotnet-ai/ directory exists
• .claude-plugin/marketplace.json lists the dotnet-ai plugin
• .github/CODEOWNERS has entries for the new paths