I faced this problem almost 1.5 years ago, and posted this Move external dependencies to a single file · Issue #403 · cetz-package/cetz · GitHub, which was added in Group external dependencies in single file by johannes-wolf · Pull Request #406 · cetz-package/cetz · GitHub, and then I did Consolidated external package imports into a separate file by Andrew15-5 · Pull Request #11 · Jollywatt/typst-fletcher · GitHub. So yeah, that’s the best one yet.