https://sushanpoudel.com/blog/Articles on AI engineering and Python backend development: RAG pipelines, LLM agents, semantic caching, Django and FastAPI APIs and system design, with code.en-usWed, 08 Apr 2026 14:53:25 +0000https://sushanpoudel.com/blog/building-your-first-ai-agent/Build a working AI agent with LangGraph: two tools, a clear prompt, a step limit and a loop that knows when to stop.Sushan PoudelWed, 08 Apr 2026 14:53:25 +0000https://sushanpoudel.com/blog/building-your-first-ai-agent/AI agentsLLMLangGraphPythonhttps://sushanpoudel.com/blog/data-leakage-in-preprocessing/Four preprocessing mistakes that leak test data into training, why validation hides them, and how to split first and use pipelines.Sushan PoudelMon, 16 Feb 2026 15:28:54 +0000https://sushanpoudel.com/blog/data-leakage-in-preprocessing/Data scienceMachine learningPythonscikit-learn