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RAG vs. Skill vs. MCP vs. RLM

28 points| weltview | 1 day ago |blog.alexewerlof.com

1 comment

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7777777phil|6 hours ago

Good taxonomy but in practice these compose more than they compete I think..

Production agent stacks already layer MCP for tool access on top of RAG for context retrieval, with RLM-style orchestration wrapping the whole thing. The question nobody answered cleanly to me yet is which layer owns state. I wrote about this decomposition (1) and RAG's specific failure mode with sequential data (2).

(1) https://philippdubach.com/posts/dont-go-monolithic-the-agent...

(2) https://philippdubach.com/posts/beyond-vector-search-why-llm...