300k-400k isn’t the current limit if you create modules and/or organize the code reasonably.. for the same reason we do this for humans: it allows us to interact with a component without loading the internals into out context.

you can also execute larger tasks than this using subagents to divide the work so each segment doesn’t exceed the usable context window. i regular execute tasks that require hundreds of subagents, for example.

in practice the context window is effectively unlimited or at least exceptionally high — 100m+ tokens. it just requires you to structure the work so it can be done effectively — not so dissimilar to what you would do for a person