Entity conversion is the holy grail. You cannot convert Java entity code (which uses LivingEntity classes and AI tasks). Instead, you must:
Use Structure Placer add‑ons or pre‑generate structures and import them as *.mcstructure files. convert jar to mcaddon work
Select both the Resource Pack and Behavior Pack folders simultaneously. Right-click and choose (or use 7-Zip). Entity conversion is the holy grail
These are zip archives containing two distinct systems that work together: convert jar to mcaddon work
You cannot press a button to convert mod.jar to mod.mcaddon . The architectures are fundamentally different.