I tried using the URI-scheme and vault-parameter some time ago on linux, to open specific vaults via script. Surprisingly, this did not worked at all. Even worse, the whole scripting of obsidian is horrible even on the fundamental levels, and it failed on pretty much any normal job. Though, this is not such a surprise, considering that it's complete foreign to linux any kind of integration. At the end, it's a closed space, not like an editor, open to the rest of the system.