Looks like default OpenCode / Claude Code behavior with Claude models. Why the extra prompt ?

Good question!

1. The post was written before this was common :)

2. If using Cursor (as I usually am), this isn't what it always does by default, though you can invoke something like it using "plan" mode. It's default is to keep todo items in a little nice todo list, but that isn't the same thing as a spec.

3. I've found that Claude Code doesn't always do this, for reasons unknown to me.

4. The prompt is completely fungible! It's really just an example of the idea.