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The internal version at least is heavily based on a global commit cloud.

If you give me your commit ID I can immediately print it on my workspace without you having to upload a formal change request.

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That’s a feature of jj’s integration with Piper, and is not relevant outside of Google, as neither Piper nor that jj integration is available to anyone else.

That's not a jj feature, but a CitC feature. You can use it on hg workspaces or plain p4 workspaces.

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