# THEMING — how to edit the ARRFLIX theme without breaking it > Short, actionable companion to `docs/31-theme-layer-model-and-edit-guide.md`. > Read 31 once for the why; come back here for the checklist every edit. ## TL;DR — checklist before EVERY theme edit 1. Read `docs/31-theme-layer-model-and-edit-guide.md` (canonical layer model). 2. Decide: **am I painting an ancestor of `