AI Stack: Claude Code, GraphRAG/Advanced RAG, Model Context Protocol (MCP), LangChain/LangGraph, pgvector/Pinecone, DeepEval/Ragas/Arize Phoenix, and LangSmith/Langfuse (or equivalent tooling). Data Platforms: ELT/ETL , Relational/NoSQL DBMS, Vector databases, and cloud data platform integrations (dbt, Dagster, Airbyte, Snowflake).