can't tell whether bazaar wants to write a branch when opening it

[Aaron Bentley]

This would allow us to create projects when doing lp name resolution and create appropriate links to productseries.

It would allow us to provide extra security by doing readonly transports for read-only operations.

It would make horizontal scaling of readonly operations easier.

It would allow clearer errors when attempting to write to branch with no lp login.

[Robert Collins (lifeless)]

The use cases sound intriguing. I'm not sure about making projects, as LP
wants a lot of details there, but certainly making series just-in-time would
be great. Couldn't you do that today by just making them on the first
mutating call ? Like, you could pretend to have a blank branch at a new
series? Just speculating aloud.

[Robert Collins (lifeless)]

Also I thought this was a dup, but I can't see one trivially.

[Michael Hudson-Doyle (mwhudson)]

Another use case for this would be to direct read-only lp:foo requests to a protocol that doesn't require authentication, which would make life a bunch nicer for us high-latency people.

[Martin Pool (mbp)]

This should be considered as part of the overall lp-login and lp-url story.

[Jelmer Vernooij (jelmer)]

There is some support for this in Breezy.