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<@U04HSHJN1HN> can you provide some more context here? What history file and folder do you mean?

Hi,
```root@pulumi:/srv/pulumi# pulumi login
Logged in to pulumi as root (file://.)```
the folder `history` is at the same location with state file
```root@pulumi:/srv/pulumi/.pulumi# tree -L 1
.
├── backups
├── credentials.json
├── history
├── locks
├── plugins
├── stacks
├── templates
└── workspaces```
and it store files ending with `checkpoint.json`  `checkpoint.json.attrs`  `.history.json`  `history.json.attrs`

For self-managed backends, there is no automation around expiring history. They can safely be deleted in most cases unless you want to roll back.