We don't have enough context here really. For simple changes, sure - 10min is plenty. But imagine you actually have a big spec ready, with graphical designs, cucumber tests, integration tests, sample data, very detailed requirements for multiple components, etc. If the tests are well integrated and the harness is solid, I don't see a reason not to let it go for a couple hours or more. At some point you just can't implement things using the agent in a few simple iterations. If it can succeed on a longer timeline without interruption, that may be actually a sign of good upfront design.
To be clear, this is not a hypothetical situation. I wrote long specs like that and had large chunks of services successfully implemented up to around 2h real-time. And that was limited by the complexity of what I needed, not by what the agent could handle.
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We don't have enough context here really. For simple changes, sure - 10min is plenty. But imagine you actually have a big spec ready, with graphical designs, cucumber tests, integration tests, sample data, very detailed requirements for multiple components, etc. If the tests are well integrated and the harness is solid, I don't see a reason not to let it go for a couple hours or more. At some point you just can't implement things using the agent in a few simple iterations. If it can succeed on a longer timeline without interruption, that may be actually a sign of good upfront design.
To be clear, this is not a hypothetical situation. I wrote long specs like that and had large chunks of services successfully implemented up to around 2h real-time. And that was limited by the complexity of what I needed, not by what the agent could handle.