Thanks for the pointer, I actually didn’t know Haystack before. Looks like it belongs in the prior-art / inspiration section, so I’ll add it to the README.
From a quick look, I agree there is overlap around the canvas editor idea. Cate is aiming a bit more at the broader project workspace layer: terminals, browser previews, editors, notes, agents, git/worktrees, docking/tabs/splits, and persistent layouts around a project.
But yes, fair callout. Appreciate the input.