AI Coding Field Notes

Field notes on AI coding agents — what they cost, where they break, what shipped. Every published figure (prices, percentages, multiples, token counts and durations) as JSON and CSV, each row carrying the sentence it came from.

View the Project on GitHub xyzs996/ai-coding-field-notes

Automation Systems

9 of the 24 write-ups here are tagged Automation Systems. Every figure quoted below is in the figures table with the sentence it came from.

How Chinese AI Agent Tools Leverage 1.6 Billion Free Tokens

Chinese AI agent tools offer a game-changing strategy for independent developers to access a massive pool of 1.6 billion free tokens monthly.

The Cost-Effective Guide to Using Open Code Review for AI Programming Tools

Open Code Review is an open-source review tool built for AI-assisted development, and in benchmark tests spanning 200 real pull requests across 50 open-source repositories it scored higher on both…

58 Million Plays Started With One Account, Not Four

Two brothers ran a single short-video account until one piece of content took off, and only then copied it across several accounts, which is how the cumulative play count passed 58 million.

AI Agent Loop Engineering: Karpathy’s Method for 5x Productivity Gains

A developer in China’s AI community achieved 5x productivity gains using loop engineering, reducing MVP development time from four prompt tuning sessions to a single command installation.

Beyond Chat: How Codex Can Automate Your Word/Excel/PPT/PDF Workflows

Codex’s office automation capabilities, which are severely underestimated, can be transformed into powerful document processing agents, as shown by real-world developers, one of whom automated PDF…

From AI Demo to Product: Loop Engineering for Indie Devs

The agent processes 40-plus podcast channels overnight, transcribed and summarized, ready to read by morning.

How Chinese Developers Are Using Codex Record & Replay to Streamline Repetitive Workflows

A monthly report that used to take four hours now takes a few minutes.

How to Build a Micro-SaaS Without Spending a Dime on Ads

Jordan posted an introduction thread across 3 Reddit sub-boards and had 200 people asking for access within days, at zero cost, and those users stuck around better than the paid traffic he never bo…

The Klarna Lesson: Why AI Implementation Needs a Staircase, Not a Leap

Klarna’s AI customer service experiment, which replaced 700 human agents, initially saved $40 million in a year, but the quality of service suffered so badly that they had to rehire humans, leading…


All 24 write-ups