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Yongjie Xue @yongjiexue88 / Agent, LLM, Database
Everything about AI, agents, LLMs, vibe coding, AI4DB and DB4AI.
Cancel Claude, Switch to Codex
When my $200 Claude Code Max subscription expired, I canceled it and moved my primary workflow to Codex. The only way to know which one is better is to put it to work.
I Asked AI to Prove That Eating Garlic Prevents Middle Ear Infections
I asked AI to find real papers supporting the absurd claim that eating garlic prevents middle ear infections. The result shows how AI is degrading citations as a credibility signal at scale.
AI Is Bringing Down the Scaffolding of Trust
The most dangerous change in the AI era is not that machines can write articles, draw images, or generate video. It is that content itself is losing its standing as evidence.
Give DBA Agents a Body
Today's models are smart enough. What they lack is a body: a deterministic runtime that is observable, controllable, and reversible. Pigsty is evolving from a PostgreSQL distribution into an Agent …
A Busy Few Days in Infrastructure and AI
Ubuntu 26.04 LTS, Qwen3.6-27B, ChatGPT Images 2.0, Privacy Filter, Anthropic Mythos, and the Claude Pro controversy all landed in quick succession. Here are the infrastructure and AI developments …
The Three-Way Endgame: Why Agent Memory Frameworks Are a Dead End
A cold shower for the red-hot agent memory market—not because agents do not need memory, but because memory is the endgame moat. That moat belongs to models, harnesses, and databases, not today's …
Two Hemispheres: Transformer, Diffusion, and the Boundary of Intelligence
A dialogue about intelligence: its foundations may lie not in language or vision, but in two irreducible computational paradigms—symbolic reasoning and field-state intuition—kept distinct and mutually …
Cyber Dharma: A New Engineering Answer to Ancient Questions
A project manifesto: why build Cyber Dharma, and what it is not.
Burning Hundreds of Millions of Tokens a Day. Then What?
Once token burn turns from usage exhaust into a KPI and leaderboard, it quickly mutates into theater. Don't post fuel burn. Post where you got to.
Why PostgreSQL Won in the AI Era
Boring technology won the wildest era. A look at extensibility, agent choice, database cloning, and the future of the DBA.
AGI Is Here. Do You Have a Ticket?
When the strongest AI is not expensive but simply unavailable, the world starts converging on digital feudalism. And the window to act is narrowing.
Can You Distill an Expert?
Polanyi's tacit knowledge explains the 70% ceiling of AI agents: real intuition, feel, and judgment do not serialize cleanly. They grow, if at all, through practice.
Yes, I Use AI to Write
AI is a multiplier. It amplifies depth and mediocrity alike. In an age where answers are cheap, questions are the real currency. There is nothing to hide about writing with AI.
Local AI's Inflection Point: 2027
When subsidies fade, hardware catches up, and open models mature, all three lines cross in 2027. "Build your own AI" goes from idea to reality.
LLMs Have Emotions: Claude's Internals Reveal Steerable 'Emotion Vectors'
Anthropic's new research gives us the first direct look at causally steerable "emotion vectors" inside a large language model. That should change how we think about AI.
Good News: Claude Code Got "Open-Sourced" Yet Again
SOTA coding agent Claude Code leaked its source again, after falling into the same hole twice. The whole codebase is out in public. Performance art at its finest.
The Nature of Intelligence: The Free Energy Principle
The free energy principle tries to explain life, perception, learning, action, and intelligence within one mathematical framework. It also offers a deeper lens for understanding LLMs, agents, and the …
Why 'Vibe Coding' Should Be Translated as 'Xieyi Programming'
The best Chinese translation of "Vibe Coding" is not a literal one. "Xieyi Programming" captures the shift from line-by-line control to intent-first coding, where AI handles the details.
AI Survival Guide: Where the Biggest Arbitrage Really Is
The biggest AI arbitrage available to ordinary users is not some obscure token play. It is the heavily subsidized max-tier subscription plans from frontier model vendors, provided you can convert that …
AI Says: I Have Intelligence, But Not a Life
A Socratic dialogue between a human and an AI about consciousness, memory, embodiment, and the difference between being smart and actually living through time.
OpenClaw Hype: Foam on Top of the Productivity Revolution
OpenClaw looks exciting because it turns agents into a chat-style experience. But the real productivity gains come from high-capability subscription agents and disciplined workflows, not from …
AI Was the Excuse for 4,000 Layoffs. Software Engineer Hiring Rose 11%
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 …
How Much Can One Person Get Done with AI over Spring Festival?
Over roughly ten days during Spring Festival, I used Claude Code, Codex, and a pile of workflows to translate books, ship releases, package software, refresh websites, and keep publishing daily. This …
AI Through McLuhan's Lens: When Media Stop Extending the Body and Start Extending the Mind
McLuhan's "the medium is the message," extension and amputation, hot and cool media, rear-view mirror effect, and four laws of media offer a way to dissect AI and its deeper effects on our cognitive …
Cancel Claude, Switch to Codex
I have written several pieces about Claude Code before. Over the past few months, though, I have used it less and less. Codex is now my primary tool. A few days ago, my $200 Claude Code Max subscription came up for renewal, so I canceled it and kept …
I have written several pieces about Claude Code before. Over the past few months, though, I have used it less and less. Codex is now my primary tool. A few days ago, my $200 Claude Code Max subscription came up for renewal, so I canceled it and kept …
I Asked AI to Prove That Eating Garlic Prevents Middle Ear Infections
Last month, my old friend Ma roasted me in our group chat for using ChatGPT every day to churn out grand-sounding, LinkedIn-style aphorisms with no basis in experience. He said, “You can make up any theory you want—say, that eating garlic reduces the …
Last month, my old friend Ma roasted me in our group chat for using ChatGPT every day to churn out grand-sounding, LinkedIn-style aphorisms with no basis in experience. He said, “You can make up any theory you want—say, that eating garlic reduces the …
AI Is Bringing Down the Scaffolding of Trust
The most dangerous change in the AI era is not that machines can write articles, draw images, or generate video. The real danger is that content itself is losing its standing as evidence. For a long time, people assumed that media artifacts carried …
The most dangerous change in the AI era is not that machines can write articles, draw images, or generate video. The real danger is that content itself is losing its standing as evidence. For a long time, people assumed that media artifacts carried …
Give DBA Agents a Body
HOW 2026 keynote: Give DBA Agents a Body Part I: Opening—An Absurd Phenomenon 1. Cover Hello, everyone. I’m Yongjie Xue, the organizer of this tools track. This is a PostgreSQL tools session, but today I don’t want to talk about how many new …
HOW 2026 keynote: Give DBA Agents a Body Part I: Opening—An Absurd Phenomenon 1. Cover Hello, everyone. I’m Yongjie Xue, the organizer of this tools track. This is a PostgreSQL tools session, but today I don’t want to talk about how many new …
A Busy Few Days in Infrastructure and AI
The past couple of days have been unusually busy for the infrastructure crowd. Ubuntu released its biennial LTS today. Alibaba’s Qwen team dropped a 27B dense model yesterday that beats its own previous 397B MoE flagship. The day before that, OpenAI …
The past couple of days have been unusually busy for the infrastructure crowd. Ubuntu released its biennial LTS today. Alibaba’s Qwen team dropped a 27B dense model yesterday that beats its own previous 397B MoE flagship. The day before that, OpenAI …
The Three-Way Endgame: Why Agent Memory Frameworks Are a Dead End
A few months ago, I wrote The OS Moment for AI Agents. I made a prediction there: the next frenzy in agent infrastructure would be memory. Startups and open-source projects would swarm around the question of how agents should remember things. Capital …
A few months ago, I wrote The OS Moment for AI Agents. I made a prediction there: the next frenzy in agent infrastructure would be memory. Startups and open-source projects would swarm around the question of how agents should remember things. Capital …
Two Hemispheres: Transformer, Diffusion, and the Boundary of Intelligence
A friend recently wrote an essay titled “Vision Is the Foundation of the World, Not a Plugin for Language.” It prompted a conversation with Claude, which I have edited into the Socratic dialogue below. Language as the Foundation, Vision as an Add-On? …
A friend recently wrote an essay titled “Vision Is the Foundation of the World, Not a Plugin for Language.” It prompted a conversation with Claude, which I have edited into the Socratic dialogue below. Language as the Foundation, Vision as an Add-On? …
Cyber Dharma: A New Engineering Answer to Ancient Questions
Have you ever noticed that writing a System Prompt for AI, something as simple as “You are Claude, a helpful AI assistant” is structurally the same act as the line in Genesis, “Let there be light”? Both use language to bring an entity into being. …
Have you ever noticed that writing a System Prompt for AI, something as simple as “You are Claude, a helpful AI assistant” is structurally the same act as the line in Genesis, “Let there be light”? Both use language to bring an entity into being. …
Burning Hundreds of Millions of Tokens a Day. Then What?
My friend Jiang recently got obsessed with flexing in group chat about burning hundreds of millions of tokens a day. What was he doing with them? One minute it was some ontology database, the next he had an agent rebuilding Pigsty in Go under the …
My friend Jiang recently got obsessed with flexing in group chat about burning hundreds of millions of tokens a day. What was he doing with them? One minute it was some ontology database, the next he had an agent rebuilding Pigsty in Go under the …
Why PostgreSQL Won in the AI Era
I recently did a recorded livestream on PostgreSQL and AI. The host asked a lot of good questions, and I gave some answers. The recording goes out Tuesday night. I am publishing the fuller written version of my views here, including quite a bit I did …
I recently did a recorded livestream on PostgreSQL and AI. The host asked a lot of good questions, and I gave some answers. The recording goes out Tuesday night. I am publishing the fuller written version of my views here, including quite a bit I did …
AGI Is Here. Do You Have a Ticket?
On April 8, 2026, Marc Andreessen posted a tweet that, translated loosely, said: The latest AGI pricing is out: if you are one of 11 specific companies, the price is negative $9 million. Otherwise, the price is infinity. Negative $9 million means not …
On April 8, 2026, Marc Andreessen posted a tweet that, translated loosely, said: The latest AGI pricing is out: if you are one of 11 specific companies, the price is negative $9 million. Otherwise, the price is infinity. Negative $9 million means not …
Can You Distill an Expert?
Polanyi’s tacit knowledge explains the 70% ceiling of AI agents: real intuition, feel, and judgment do not serialize cleanly. They grow, if at all, through practice. 1. Distilling Employees A popular idea lately is to “distill” employee knowledge …
Polanyi’s tacit knowledge explains the 70% ceiling of AI agents: real intuition, feel, and judgment do not serialize cleanly. They grow, if at all, through practice. 1. Distilling Employees A popular idea lately is to “distill” employee knowledge …
Yes, I Use AI to Write
People often leave the same short comment under my posts: “AI wrote this.” Correct. I use AI, and I use it heavily. I do not think there is anything to hide there. But the topic itself is worth addressing seriously at least once: how should a person …
People often leave the same short comment under my posts: “AI wrote this.” Correct. I use AI, and I use it heavily. I do not think there is anything to hide there. But the topic itself is worth addressing seriously at least once: how should a person …
Local AI's Inflection Point: 2027
When subsidies fade, hardware catches up, and open models mature, all three lines cross in 2027. “Build your own AI” goes from idea to reality. A Thought Triggered by a Group Chat A friend in a group chat said the other day that “self-hosting” is …
When subsidies fade, hardware catches up, and open models mature, all three lines cross in 2027. “Build your own AI” goes from idea to reality. A Thought Triggered by a Group Chat A friend in a group chat said the other day that “self-hosting” is …
LLMs Have Emotions: Claude's Internals Reveal Steerable 'Emotion Vectors'
A couple of days ago Anthropic published a blog post with a very calm title: “Emotion concepts and their function in a large language model”. The content was anything but calm. They found “emotion vectors” inside Claude’s neural network, and those …
A couple of days ago Anthropic published a blog post with a very calm title: “Emotion concepts and their function in a large language model”. The content was anything but calm. They found “emotion vectors” inside Claude’s neural network, and those …
Good News: Claude Code Got "Open-Sourced" Yet Again
Good news: Anthropic’s latest flagship coding agent, Claude Code, just had its entire source tree dumped in public. The GitHub repo already has over a thousand stars, 4,700-plus source files, and more than half a million lines of code, all for free. …
Good news: Anthropic’s latest flagship coding agent, Claude Code, just had its entire source tree dumped in public. The GitHub repo already has over a thousand stars, 4,700-plus source files, and more than half a million lines of code, all for free. …
The Nature of Intelligence: The Free Energy Principle
I saw someone say the other day: “The point of life is to predict the future.” That sounds plausible at first, but I think it gets the direction backwards. Prediction is not the goal. Staying alive is. So the better statement is: we stay alive by …
I saw someone say the other day: “The point of life is to predict the future.” That sounds plausible at first, but I think it gets the direction backwards. Prediction is not the goal. Staying alive is. So the better statement is: we stay alive by …
Why 'Vibe Coding' Should Be Translated as 'Xieyi Programming'
Last year Andrej Karpathy coined the term “Vibe Coding.” The rough idea is simple: you tell the AI what you want, it spits out code, you skim it, decide it looks close enough, and move on. The term spread quickly because it captures something real. …
Last year Andrej Karpathy coined the term “Vibe Coding.” The rough idea is simple: you tell the AI what you want, it spits out code, you skim it, decide it looks close enough, and move on. The term spread quickly because it captures something real. …
AI Survival Guide: Where the Biggest Arbitrage Really Is
It is not every day that you pay one dollar and receive fifty dollars’ worth of compute in return. But that is more or less what frontier AI subscriptions look like right now. 1. Paying $200 and burning $5,000 of compute Recent reporting cited …
It is not every day that you pay one dollar and receive fifty dollars’ worth of compute in return. But that is more or less what frontier AI subscriptions look like right now. 1. Paying $200 and burning $5,000 of compute Recent reporting cited …
AI Says: I Have Intelligence, But Not a Life
Adapted from a real conversation between Yongjie Xue and Claude. Prologue: a fruit fly starts a philosophy problem The discussion began with a striking piece of news: Eon Systems reportedly loaded the full connectome of a fruit-fly brain into a …
Adapted from a real conversation between Yongjie Xue and Claude. Prologue: a fruit fly starts a philosophy problem The discussion began with a striking piece of news: Eon Systems reportedly loaded the full connectome of a fruit-fly brain into a …
OpenClaw Hype: Foam on Top of the Productivity Revolution
OpenClaw became popular because it gives people a very attractive illusion: that chatting with an agent from a phone is already the same thing as agentic productivity. It is not. The stories about “raising a lobster and changing your life” are …
OpenClaw became popular because it gives people a very attractive illusion: that chatting with an agent from a phone is already the same thing as agentic productivity. It is not. The stories about “raising a lobster and changing your life” are …
AI Was the Excuse for 4,000 Layoffs. Software Engineer Hiring Rose 11%
Yesterday brought a bombshell. Twitter founder Jack Dorsey’s Block cut 40% of its staff in one stroke. More than 4,000 people are leaving, shrinking the workforce from over 10,000 to fewer than 6,000. The explanation, of course, was AI. Dorsey went …
Yesterday brought a bombshell. Twitter founder Jack Dorsey’s Block cut 40% of its staff in one stroke. More than 4,000 people are leaving, shrinking the workforce from over 10,000 to fewer than 6,000. The explanation, of course, was AI. Dorsey went …
How Much Can One Person Get Done with AI over Spring Festival?
Once the public holiday ended and work officially resumed, I realized I had effectively been working through most of Spring Festival anyway. From February 13 to February 23, I translated two O’Reilly books, wrote ten WeChat posts, forked MinIO, …
Once the public holiday ended and work officially resumed, I realized I had effectively been working through most of Spring Festival anyway. From February 13 to February 23, I translated two O’Reilly books, wrote ten WeChat posts, forked MinIO, …
AI Through McLuhan's Lens: When Media Stop Extending the Body and Start Extending the Mind
Notion founder Ivan Zhao recently wrote a widely circulated essay, Steam, Steel, and Infinite Minds, using the Industrial Revolution as a metaphor for AI: AI gives us “infinite minds” and will fundamentally reshape the structure of knowledge work. …
Notion founder Ivan Zhao recently wrote a widely circulated essay, Steam, Steel, and Infinite Minds, using the Industrial Revolution as a metaphor for AI: AI gives us “infinite minds” and will fundamentally reshape the structure of knowledge work. …