Integrations

git is the only thing ws needs. Everything else it drives is an integration: each one comes into play when its program is on PATH and is left out otherwise, and none of them can fail a switch — a problem is a warning. ws shells out rather than linking libraries — the Nix closure is just glibc, and the musl build links nothing at all — so these are the programs it looks for:

tmux or herdr	the session over the branch directory, see Multiplexers; without either, ws prints the branch directory
fzf	the picker of ws pick, see fzf and zoxide
zoxide	directory registration and ws pick --global
yarn, pnpm, npm, uv	package manager installs, and package.json tasks
just, task	the task sources of ws run

Local files need no program, only a directory. ws status lists which integrations are active on this machine.