I need to implement some functionality that should work in similar ways when faced with a plain Git vs a git-annex repo. In this context I am looking for the cheapest of the appropriate tests for an initialized annex?

I have looked at

• git config annex.uuid (~3ms)
• git rev-parse git-annex (~3ms)
• git annex info --fast -q (~50ms)

Are the fast ones sufficient to guarantee that no subsequent call to a git-annex command would yield git-annex: First run: git-annex init?

Thanks!