The slot scan and the .env.local writer existed twice, once inline in
scripts/worktree-env and once in scripts/post-create.sh. Both are now
wm_assign_ports and wm_write_env_local in scripts/worktree-common.sh, so a
third caller cannot drift from the other two.
wm_assign_ports takes the worktree root instead of reading the process cwd,
which lets it run from outside the worktree, and prints its slot line to stderr
so stdout carries only the port pair.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
hugocasa
centdix