Letting Go Isn't a Switch, It's a Dial
Sync and async aren't black and white. In real work it's more like a dial: from "confirm every step" to "hands off entirely," with countless settings in between. That's semi-async.
Turn the Dial by Risk
To decide how much to let go, look at two questions: how big are the consequences if it's wrong? How hard is it to undo?
改 README 错别字 → 后果小、好回退 → 大胆放手
改支付金额计算 → 后果大、难回退 → 盯紧，每步确认Checkpoints: Let Go but Keep a Gate
The essence of semi-async is setting checkpoints: let it run, but have it stop at key moments for your confirmation—e.g. "pause after editing, before committing."
That way you neither have to watch the whole time nor let it charge ahead to an unrecoverable mess.
自测 · 学完检查一下
想真正动手做题、记进度、攒连胜？到互动课里练。
Judge: the degree of letting go has only two states—"watch the whole time" and "hands off entirely"—with nothing in between.
答案：False
Semi-async is precisely the continuum between the two; you decide how far to let go.
Which metaphor best describes the "letting go" of semi-async?
答案：A dial, adjustable to any setting
Letting go is a continuously adjustable degree—like a dial, not a switch.
Which task most needs to be "watched closely, confirming every step"?
答案：Adjusting the payment-amount calculation logic
Changes that are high-consequence and hard to undo should have the dial turned all the way to "watch closely."
Judge: when a change is "low-consequence and easy to undo," you can let the Agent run more freely.
答案：True
Low-risk, easily-undone work suits letting go boldly, saving your energy for high-risk tasks.
In semi-async, having the Agent pause and wait for your confirmation at a key moment—this moment is called a ___.
答案：checkpoint
A checkpoint lets you skip watching the whole time while still being able to stop it before it gets out of control.
Judge: letting go but setting no checkpoints at all is, in effect, about the same as pure async.
答案：True
Without checkpoints there's no mid-way interception; if it drifts you can't catch it either—same as async.