Walgit leans on S3 primitives but has classic distsys bugs

What happened
Walgit leans on S3 primitives but has classic distsys bugs Tests pass cuz its memstore makes cond deletes But w/ S3 it HEAD->compare->DELETE so stale owner can delete new lease The code incorrectly says S3 lacks conditional DELs. Which AI model wrote this? It's wrong in basics
Summary assembled by rule from the sources below