Hi,

Can people still load code in older versions of Pharo ? I think 6.x is no problem, but what about earlier versions ?

You will need to update Metacello in older versions of Pharo to use Tonel. But Pharo <6.1 is officially not supported anyway.

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What about other Smalltalk implementations ? What is the official answer here ?

If they use Metacello, then you should be able to use Tonel.

A second question: suppose a repo is converted, is then still possible to copy a version over to an old MC repo ? Just to keep it in sync.

As long as Iceberg uses internally a Metacello repository for Tonel, you should be able to copy a _snapshot_.

If you want to keep a "in sync" history with ancestry and stuff, then I would advise against it. The history model is quite different between git and MC and you need to make compromises going in each direction.

Peter