ChatGPT

After shipping three production applications on the OpenAI API, the lessons that stick are not about prompts or models — they are about rate limits, cost control, and the things that break under real traffic.

ChatGPT Projects changed how I use the tool daily — persistent instructions, shared context across conversations, and a much cleaner way to separate different kinds of work.

Beyond autocomplete — how to use ChatGPT as a genuine engineering tool for debugging, design review, and grinding through the tedious parts of a project without shipping subtle bugs.