Enabled is the whole-playbook lever. Absent reads as ON; an explicit false makes resolution skip this playbook entirely and fall through to the next tier, rather than serving an empty journey.
Principles are the fixed 64-archetype spine a tactic files under. It is authored data an operator organises the corpus by; nothing in the checklist engine reads it.
Version is the playbook's own name for this edition of its content, chosen by whoever authored it. It travels onto every journey projected from it. The store's numeric revision is a separate value and lives beside it.