Here's a weird but powerful way of thinking about this. If you want to have a 95% chance of success with Claude Code, and it's a two-hour task - which means Claude has about a 50% success rate - then run four copies of Claude Code.

Assuming they're all independent of each other, and that the reasons for failure are independent, then you'll get about a 95% chance of having a successful output for whatever it is you're trying to build.

If it's already an 80% task - so it's a 20-minute task - then two copies of Claude will get you up to a 95% chance of success.

This can work in a couple of different ways. It can work sequentially: run Claude once, realize it got it wrong, rewind and give it slightly better instructions so it does better the next time. Then maybe discover that it only got half the specification, so you write the rest of the specification and let it carry on. That could be sequential like that - four tries, knowing you might need to throw the code out three times and try again each time.

Or it could be four in parallel. If the nature of what you're doing makes sense to try four different approaches simultaneously, then fire off four copies of Claude, and one of them is likely to succeed in the task.

This is the abundance mindset in action - using multiple attempts to dramatically increase your probability of success.