1. Make sure you are using Opus model. Type /model and make sure Opus is selected. While many say sonnet is good, too, I’m not too convinced. Opus is the first model that actually convinced me to use AI as my daily driver - and I’m a developer for about 20 years.
2. Make the tasks as small and specific as possible. Don’t prompt „create a todo app with user login“ but „create a vue app where users can register, don’t do more than that“, then „build a user login“ then, „create a page to create todo items“, then „create a page to list todo items“, then „on list page, add delete functionality“ - and so on, you get the idea.
3. beware the context size. Claude code will warn you if you exceed it, but even before: the higher the context window, the higher AI will miss things. If you start a new prompt that doesn’t require the whole context of the previous one, type /clear.
4. build an agents.md or Claude.md. /init will do that for you, but it will just create a Claude.md with information that it might think are important - but easily miss things. You know best. It often also includes file and directory structure, while it could easily find out again (tree command) without that info in agents/claude file. Still I recommend: let Claude create that file, then adjust it to your needs. Only add important stuff here. The more you add, the more you spam the context. Again, try to keep context small.
5. if Claude needs a long time for finishing a task or did it wrong at first attempt, tell it to update the Claude.md with information to not do the same mistakes the next time again.
6. make sure you understand the code it created. Add conventions to agents.md that will make the code more readable (use early returns, don‘t exceed nesting level of 3, create new methods with meaningful names instead of inline comments etc.)
Good luck!