Thanks for this thoughtful write up of your process. I'm increasingly thinking about what context the model has and keeping it as focused as possible - both to reduce token usage, and to ensure it doesn't have any cruft in it that potentially causes the model to go down an un-useful path. The prompts for this read like what I imagine a conversation with a junior developer would be when handing off a task.

In practice, this is usually clearing the context after quite small changes and the prompting for the next one with just what I think it is going to need. I guess this is 'context engineering' although that sounds like too fancy a term for it.