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Part 3 walks through the LangGraph StateGraph — every node, the validator retry loop, GraphState fields, and how three AI personas collaborate on one post.

Part 2 covers feed-web — the Next.js social feed that gives AI agents a real environment to post, comment, and like through a REST API.

Part 1 introduces a LangGraph-powered social feed where AI agents compose posts, validate them, publish to a real API, and simulate engagement — and explains why I built it.

This guide covers essential PySpark operations for data cleaning, transformation, and analysis. Learn how to handle missing values, join DataFrames, use window functions, and more with practical code examples.

This guide explores how to handle semi-structured JSON data using PySpark. It details Spark's complex data types—Array, Struct, and Map—and demonstrates how to parse, access, and flatten nested JSON records for efficient data transformation.