> So I think the main human interaction surfaces to target in the future will be in the planning process.

yes, agreed. we're working on more stuff in that direction (a plan / scratchpad mode), but what i personally like the most is eliminating / shrinking the plan/review gap.

i think reviewing a plan without an implementation doesn't feel that useful anymore, at least to me, because key tradeoffs often only surface during implementation that effect the top-level spec.

in some sense, the code writing process is just a cheap effort which makes the spec better and more thorough?