• hdfs: implement isdir and isfile (#4460) @efiop
• experiments: fix bug where wrong git branch checked-out before pull (#4450) @pmrowla
• experiments: support binary and untracked files in experiment patches (#4452) @pmrowla
• metrics: don't raise on dir during collection (#4443) @pared
• diff command: output in markdown format with hash (#4435) @PuneethaPai
• add json serialization utils (#4441) @skshetry
• metadata() on RepoTree (#4434) @skshetry
• experiments: abstract executor tmpdir population using tree upload (#4432) @pmrowla
• tree: add overwrite parameter in tree.upload (#4442) @pmrowla
• utils.serialize: modify_yaml contextmanager to reduce boilerplate (#4426) @skshetry
• Enable profiling from cli (#4437) @skshetry
• Yaml with trees (#4425) @skshetry
• git: do not ask for gpg signoff on merge (#4430) @skshetry
• Mark test_new_simple as flaky (#4429) @skshetry
• dvc: move Dvc/RepoTree to dvc/tree (#4427) @efiop