What to do if someone wants to conditionally run different modules.

configuration a -> requires module [a, b, c, d]
configuration b -> requires module [a, b, e, d]

Write a way to embed submodules and call them easily.

Start by reviewing the two configuration examples in the issue and locating the project's module-loading entry points. Define how submodules should be embedded and selected for each configuration, then document a verifiable behavior for calling the selected modules; no files or tests are named in the payload.

Written by the indexing model from the issue text.