Changed
Context
How would I simplify entry of multiple chores, like taking out recycling and compost at the same time?
Vacuum floor could be a task that has vacuum living room, vacuum bedroom as subtasks.
Chore log could have a subtask reference field, which could be filled out with checkboxes.
Done
This worked!
When creating a Core log, using Entity Prepopulate on the "chore" query parameter set by the Views Add Button to set the referenced chore, and can also be used to filter an entity reference view. That means that a Chore log has checkboxes for each of the chore's children for easy entry.
Next steps
Now I need to adjust the listing. How to nest pinned children under the parent? How to update the parent and children to mark done at the same time?