Why not use a worktree?Does this work on Linux?What happens on ext4?Can I run it from inside a clone?How do I keep the canonical current?How do I undo one?What if the canonical moves?Does it need GitHub, or a remote at all?How is this different from a fresh git clone?

Can I run it from inside a clone?

Yes, and what you get is another clone of the same canonical. Each clone records where it came from in a `.gitto` file, so every command resolves the canonical from wherever you are standing, and a chain of clones of clones cannot form.

Yes, and what you get is another clone of the same canonical. Each clone records where it came from in a .gitto file, so every command resolves the canonical from wherever you are standing, and a chain of clones of clones cannot form.

What happens on ext4?

It refuses and says why. ext4 has no way to share blocks between two files, so every copy would cost the full size.

How do I keep the canonical current?

`gitto sync` fetches, fast-forwards it, and runs `.gitto-refresh` if the project carries one. `gitto list` prints how far behind the canonical is on its first line, so the drift is visible before it costs you anything.