Use Spec Kitty when a team wants a spec-driven implementation loop for larger AI coding projects, with explicit artifacts, task lanes, worktree isolation, and review handoffs, rather than relying on unstructured long-form agent chats. The invoke moment is concrete: initialize a mission, generate or refine the spec and task artifacts, then advance work through the next, review, and merge flow. That scope boundary, repo-native spec-to-merge coordination for coding agents, keeps it distinct from a general coding agent or generic project-management product listing.