[ninja author] I like how their example is a build system, given Ninja constructs an object literally called "Plan"[1].

However, when I later revisited the design of Ninja I found that removing the separate planning phase better reflected the dynamic nature of how builds end up working out, where you discover information during the build that impacts what work you have planned. See the "Single pass" discussion in my design notes[2], which includes some negatives of the change.

If the author reads this, in [2] I made a Rust-based Ninja rewrite that has some similar data structures to those in the blog post, you might find it interesting!

[1] https://github.com/ninja-build/ninja/blob/dcefb838534a56b262... [2] https://neugierig.org/software/blog/2022/03/n2.html