I will build a custom ai agent with langchain, rag, claude or gpt

I build reliable, code-first AI agents that actually ship not demos that break in production. I work with LangGraph, LangChain, and LangSmith, hold 12 Anthropic certifications, and build with agents daily (Claude Code, MCP, sub-agent orchestration).

I recently built a production AI copilot with a LangGraph agent orchestrating 19 tools, human-in-the-loop confirmation before any payment, session memory, RAG, and full LangSmith observability over a transactional backend. That's the level of robustness you get.

What you get:

- A custom agent using Claude (Anthropic) or GPT (OpenAI) tuned to your task

- Tool calling / function calling so the agent can take real actions

- Optional RAG so it answers from your own documents or database

- Prompt engineering hardened against prompt injection

- Clean, documented code you own Python (FastAPI) or TypeScript (Node/Next.js)

Typical use cases: customer-support agent, research/summarization agent, data-extraction pipeline, internal ops automation, lead qualification.

Message me before ordering with a short description of your task so I can confirm scope and timeline.