Make `wt step tether` honor the global `-C` flag as the spawned command's working directory (consistent with `run_custom`), and use it to tether this repo's `zola serve` docs preview so it is reaped whenever the worktree is removed — replacing the fragile [post-remove] port-kill hook that leaked ~83 zola processes.
`wt step tether -- CMD…` runs CMD in its own process group and tears the whole
group down when CMD exits or its worktree is removed (a 250ms portable poll;
killpg on Unix, taskkill /T /F on Windows). Replaces the leaked-dev-server /
fseventsd-saturation failure mode with a fire-and-forget supervisor needing
only a single post-start hook. No unsafe, no new deps. Shell handling matches
`wt step for-each`. Windows taskkill has a documented self-exit-detach edge.
Co-Authored-By: Claude <noreply@anthropic.com>
Maximilian Roos