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if you're running against different stacks, yes it is!

<https://github.com/pulumi/pulumi/issues/6287|https://github.com/pulumi/pulumi/issues/6287>
So can I safely assume that `workspaces` file is managed per workspace, per stack?

There’s a little more information in <https://github.com/pulumi/pulumi/issues/8186> about what exactly causes the `workspaces` corruption

TL;DR  it’s the `createStack` or `selectStack` function running in parallel that causes the corruption, running `up` with local programs should be fine