Software Engineering on Yongjie Xue

Documentation-Driven Development: The First Secret to AI Software Engineering

Sat, 29 Aug 2026 00:00:00 +0000

People often ask: how do I ensure quality when AI writes the code? My answer has four parts: documentation-driven development, adversarial review, brute-force testing, and complexity penalties.

AGI Machine Guns Are Now Standard Issue

Thu, 20 Aug 2026 00:00:00 +0000

In one month, my friend Jiang cobbled together four databases, an operating system, a programming language, a compiler, and a CPU—a microcosm of today’s AI frenzy.

Why Are People Who Leave Big Tech So Useless?

Fri, 14 Aug 2026 00:00:00 +0000

People who leave Big Tech are not stupid. They have simply spent too long using a rented mental map. Only after leaving the platform do they discover that the map has to be returned.

Did AI Rewrite PostgreSQL in Rust? Not Quite

Sat, 11 Jul 2026 00:00:00 +0000

pgrust’s clean-room rewrite failed. Its mechanical port passed. The difference shows what AI can copy—and what it cannot.

AI Was the Excuse for 4,000 Layoffs. Software Engineer Hiring Rose 11%

Fri, 27 Feb 2026 00:00:00 +0000

AI is becoming the story companies tell when they lay people off, but total demand for software engineering has not disappeared. It is spreading across the wider economy, driven by second-order demand unleashed as barriers fall.

Don't run AI assistant on cloud

Fri, 30 Jan 2026 00:00:00 +0000

Before you hit “one-click deploy” on that cloud AI assistant, ask yourself: what exactly are you giving up?

There’s a reason why people by Mac mini rather than running clawdbot on the cloud.

When AI Becomes Your Butler

Moltbot (formerly Clawdbot) just exploded on GitHub. Tens of thousands of stars in days. Mac Minis sold out.

MySQL vs. PostgreSQL @ 2025

Thu, 17 Apr 2025 00:00:00 +0000

A 2025 reality check on where PostgreSQL stands relative to MySQL across features, performance, quality, and ecosystem.

Optimize Bio Cores First, CPU Cores Second

Sat, 07 Sep 2024 00:00:00 +0000

Programmers are expensive, scarce biological computing cores, the anchor point of software costs — please prioritize optimizing biological cores before optimizing CPU cores.

Database Demand Hierarchy Pyramid

Wed, 10 May 2023 00:00:00 +0000

Similar to Maslow’s hierarchy of needs, user demands for databases also have a progressive hierarchy: physiological needs, safety needs, belonging needs, esteem needs, cognitive needs, aesthetic needs, self-actualization needs, and transcendence needs.

PostgreSQL Development Convention (2018 Edition)

Wed, 20 Jun 2018 00:00:00 +0000

Without rules, there can be no order. This article compiles a development specification for PostgreSQL database principles and features, which can reduce confusion encountered when using PostgreSQL.

Go Database Tutorial: database/sql

Thu, 24 Aug 2017 00:00:00 +0000

Similar to JDBC, Go also has a standard database access interface. This article details how to use database/sql in Go and important considerations.