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Switching 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.

Profession
Developer
Tools
Claude Code, Cursor
Source
newsletter.nagringa.dev ↗
Country
🇧🇷 Brazil
Report date
August 15, 2025
Verified on
October 24, 2026
Illustrative photo: Services/Technology sector

What they did

They started using Claude Code as their main tool for big features and refactors.

How it went

He says an average feature used to take a week, dropped to 1 to 2 days with Cursor and now ships in a single 2 to 3 hour session.

Good to know

Review the diffs: speed doesn't replace code review.

The prompt

Before coding the feature [description], read the project, propose a step-by-step plan with the files you'll touch, and wait for my approval. Then implement it step by step and run the tests.

Replace what is in [brackets]. Prompt written by us from the account, not a literal copy of the source. Do not paste other people’s personal data (privacy laws such as LGPD and GDPR apply).

Summary in our own words. Results as stated in the original account; we have not tested or audited them. Read the source ↗ Found a mistake?

Illustrative photo: Services/Technology sector01
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Teaching 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.

DeveloperChatGPTCodex
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Illustrative photo: Services/Technology sector03
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Leave 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.

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Launching 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.

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Building 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.

DeveloperAgentes de IA
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Illustrative photo: Services/Technology sector06
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Asking 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.

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Illustrative photo: Construction sector07
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Building 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.

Business OwnerEngineerClaude Code
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Illustrative photo: Services/Technology sector08
Programming🇧🇷 Brazil

Set up a 100% local AI coding environment

A junior developer integrated local models into VS Code with Ollama and Cline, with no paid APIs.

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