I used to compare MCP and Skill in my post (AI-assisted [1]) and also maintain a CLI/MCP/Skill for YouTube.

In my opinion, MCP is not dead. "MCP Belongs to Software Engineering", it ships existing concepts from software engineering into AI. CLI, MCP-tools, and OpenAPI are interchangeable to some degree, but MCP is more than tools; there are mcp-apps[2], lazy load in context[3].

[1]: https://log.ifor.dev/posts/mcp_vs_skill/

[2]: https://modelcontextprotocol.io/extensions/apps/overview

[3]: https://code.claude.com/docs/en/agent-sdk/tool-search