Unknown command arc feature

I am using comment ‘feature’ like:
arc feature [new_feature]

I got :
Usage Exception: Unknown command ‘feature’. Try ‘arc help’.

Why this happen, i can’t use comment ‘feature’.

Thanks.

arc feature workflow has been replaced with arc branches, arc bookmarks and arc work in early July - see ⚓ T2928 "arc start" / "arc feature" / "arc push" Discussion and ⚡ 2020 Week 26 (Early July).

Yes, working with arc work

Thanks