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Category · 15 cases
AI in programming
Cases of developers and curious tinkerers using AI to write, review and maintain code: automations, scripts, websites, migrations, tests and internal tools. The accounts show real speed gains, but also subtle bugs, invented dependencies and the need to review everything before it goes to production. Here you will find each person's workflow, the tool they used and a prompt to adapt to your repository.
15 cases, 11 of them from Brazil, from newest to oldest. The tools cited most here are Claude Code, ChatGPT, and Cursor. People who show up most in these accounts: developer, researcher, and devops.
The cases
15 cases
01Lab tests an agent for a month: most tasks failed
Answer.AI gave Devin real tasks and documented that few of them worked out.
02Letting the agent deploy and read production errors on its own
The founder of a deployment platform explains how they designed an MCP server to take the human out of "copy and paste the log".
03Launching a habit app solo and doing the marketing with AI
A dev created Kada, a habit app with no account and no ads, and used AI for marketing.
04Building an "internet TV" in 6 days with a team of agents
A dev created Crom TV, with 24-hour channels of YouTube videos, coordinating several AI agents.
05Asking AI for a specific algorithm for a research project
A developer skeptical of LLMs used Gemini to generate random quantum circuits in the QCOP project.
06Teaching an agent to use your bank's API
A developer created an open source skill so Codex and Claude Code can integrate with the Banco Inter API.
07Building an entire platform without being a programmer
A construction inspection entrepreneur in Kazakhstan used only Claude Code for ~6 months to create more than 30 modules.
08Set up a 100% local AI coding environment
A junior developer integrated local models into VS Code with Ollama and Cline, with no paid APIs.
09Build a World Cup tracking website with AI help
An engineer built Central da Copa 2026 and explains why it wasn't "just asking the AI to do it."
10Following the AI blindly and breaking Linux (and learning from it)
A developer describes how commands suggested by an AI broke their dual boot and what they learned.
11Leave a coding agent running for 24 hours and learn from the bill
An experiment letting Claude Code work unsupervised for a full day ended with a high bill and a security scare.
12Switching from Cursor to Claude Code for Big Features
A Brazilian dev who works for clients abroad describes how their way of working with agents changed.
13Redoing an Event Schedule Straight from Your Phone
Simon Willison scraped a conference website and built a better interface using only his phone.
14Converting Map Data with AI's Help
Simon Willison used Claude and ChatGPT to convert a shapefile of a park boundary into GeoJSON.
15Finding a strange bug by pasting the error into ChatGPT
A Java dev couldn't create a table in H2; ChatGPT pointed to the problematic field.