feat(cd): wt ~ takes you to the repo root

README.md

@@ -23,6 +23,7 @@ Then reload your shell (`source ~/.zshrc`) or open a new terminal.
 ```sh
 wt                        # list all worktrees
 wt <name>                 # cd into worktree by branch name
+wt ~                      # cd to the repo root (also: wt root)
 wt mk <branch>            # create worktree in .claude/worktrees/<branch> and cd into it
 wt mk <branch> <path>     # create worktree at a specific path and cd into it
 wt rm <name>              # remove a worktree

test/cd.bats

@@ -20,3 +20,36 @@ teardown() { wt_common_teardown; }
   [ "$status" -eq 1 ]
   [[ "$output" == *"no worktree matching"* ]]
 }
+
+@test "wt ~ goes to the repo root" {
+  cd "$TEST_REPO-feature"
+  _wt_cd "~"
+  [ "$PWD" = "$TEST_REPO" ]
+}
+
+@test "wt ~ works after the shell has expanded it to \$HOME" {
+  cd "$TEST_REPO-feature"
+  _wt_cd "$HOME"
+  [ "$PWD" = "$TEST_REPO" ]
+}
+
+@test "wt root goes to the repo root" {
+  cd "$TEST_REPO-other"
+  wt root
+  [ "$PWD" = "$TEST_REPO" ]
+}
+
+@test "a worktree named root still wins over the repo root" {
+  git -C "$TEST_REPO" worktree add -q "$TEST_REPO-root" -b root
+  cd "$TEST_REPO-feature"
+  _wt_cd root
+  [ "$PWD" = "$TEST_REPO-root" ]
+  cd "$TEST_REPO"
+  git worktree remove "$TEST_REPO-root"
+}
+
+@test "wt ~ outside a repo fails rather than going home" {
+  cd "$(mktemp -d)"
+  run _wt_cd "~"
+  [ "$status" -ne 0 ]
+}

wt.sh

@@ -145,11 +145,21 @@ _wt_claude_rm_sessions() {
   return "$rc"
 }
 
-# navigate to a worktree by branch name or directory basename
+# navigate to a worktree by branch name or directory basename; ~ (or root) goes
+# to the repo root. The shell expands a bare ~ before wt sees it, so $HOME counts
+# as ~ too. A real worktree still wins, so a branch named "root" keeps working.
 _wt_cd() {
-  local target
-  target=$(_wt_resolve "${1?usage: wt <name>}")
-  [ -z "$target" ] && { echo "wt: no worktree matching '$1'" >&2; return 1; }
+  local name="${1?usage: wt <name>}" target root
+  if [ "$name" != "~" ] && { [ -z "$HOME" ] || [ "$name" != "$HOME" ]; }; then
+    target=$(_wt_resolve "$name")
+  fi
+  if [ -z "$target" ]; then
+    case "$name" in
+      "~"|root|"${HOME:-~}") root=$(_wt_root) || return 1; cd "$root"; return ;;
+    esac
+    echo "wt: no worktree matching '$name'" >&2
+    return 1
+  fi
   cd "$target"
 }
 
@@ -420,6 +430,7 @@ Usage: wt [command] [args]
 Commands:
   wt                            list all worktrees
   wt <name>                     cd into worktree by branch name
+  wt ~                          cd to the repo root (also: wt root)
   wt cd <name>                  cd into worktree (explicit form)
   wt ls [opts]                  list worktrees (same as bare wt)
   wt mk <branch> [path] [opts]  create worktree (default: .claude/worktrees/<branch>)
@@ -503,7 +514,7 @@ if [ -n "$ZSH_VERSION" ]; then
     local -a matches
     # l:|=* matches the typed text anywhere in a candidate
     if [ $CURRENT -eq 2 ]; then
-      matches=(ls cd mk rm prune merged help $(_wt_branches))
+      matches=(ls cd mk rm prune merged root help $(_wt_branches))
       compadd -M 'l:|=*' -a matches
     elif [ $CURRENT -gt 2 ]; then
       case "${words[2]}" in
@@ -535,7 +546,7 @@ elif [ -n "$BASH_VERSION" ]; then
   _wt_complete() {
     local cur="${COMP_WORDS[COMP_CWORD]}"
     if [ $COMP_CWORD -eq 1 ]; then
-      _wt_compreply "$cur" ls cd mk rm prune merged help $(_wt_branches)
+      _wt_compreply "$cur" ls cd mk rm prune merged root help $(_wt_branches)
     else
       case "${COMP_WORDS[1]}" in
         rm|remove|cd|merged)