What I Learned Using DeepSeek V4 Pro for a Real Coding Task

A practical retrospective from an AI-assisted software delivery experiment I recently tested DeepSeek V4 Pro on a real coding task from my AEIP — Agentic Execution Infrastructure Platform project. This was not a toy example. It was not a “generate a function” prompt. It was a production-style task involving a Rust/Axum backend, PostgreSQL, NATS JetStream, [ ]