fix: detect .worktrees/ ignore via git check-ignore

README.ko.md

@@ -174,7 +174,7 @@ cwt new --no-launch my-task          # 어시스턴트 실행 건너뛰기
 ```
 
 [fzf](https://github.com/junegunn/fzf)가 설치되어 있으면 브랜치 선택, worktree 선택, setup wizard의 위치/폴더 선택에 우선적으로 사용됩니다. 그렇지 않으면 번호 목록과 화살표 브라우저로 동작합니다.
-기본 `.worktrees` 디렉토리를 사용할 때 `cwt new`는 `.gitignore`에 `.worktrees/`가 이미 있어야 하며, 파일을 자동 수정하지 않습니다.
+기본 `.worktrees` 디렉토리를 사용할 때 `cwt new`는 `.worktrees/`가 이미 gitignore되어 있어야 하며(저장소 `.gitignore`, `.git/info/exclude`, 글로벌 excludes 파일 모두 가능), 어떤 파일도 자동 수정하지 않습니다.
 `CWT_AUTO_LAUNCH=false`일 때도 명시적 실행 플래그(`--assistant`, `--split`, `--tab`, `--launch-target`)는 어시스턴트를 실행합니다.
 
 ### worktree 목록

README.md

@@ -174,7 +174,7 @@ cwt new --no-launch my-task          # skip assistant launch
 ```
 
 If [fzf](https://github.com/junegunn/fzf) is installed, cwt prefers it for branch selection, worktree picking, and setup-wizard folder/location choices. Otherwise, numbered lists and the arrow-key browser are used.
-When the default `.worktrees` directory is used, `cwt new` requires `.worktrees/` to already be present in `.gitignore` and refuses to edit the file automatically.
+When the default `.worktrees` directory is used, `cwt new` requires `.worktrees/` to already be gitignored (via the repo `.gitignore`, `.git/info/exclude`, or your global excludes file) and refuses to edit any file automatically.
 When `CWT_AUTO_LAUNCH=false`, explicit launch flags (for example `--assistant`, `--split`, `--tab`, `--launch-target`) still launch.
 
 ### List worktrees

cwt.sh

@@ -1676,15 +1676,14 @@ _cwt_ensure_default_worktree_ignored() {
   local worktrees_dir="${2:-$_cwt_worktrees_dir}"
   [[ "$worktrees_dir" != "${git_root}/.worktrees" ]] && return 0
 
-  local gitignore_path="${git_root}/.gitignore"
   local ignore_entry=".worktrees/"
 
-  if [[ -f "$gitignore_path" ]] && grep -Eq '^[[:space:]]*\.worktrees/?[[:space:]]*$' "$gitignore_path"; then
+  if git -C "$git_root" check-ignore -q "$ignore_entry" 2>/dev/null; then
     return 0
   fi
 
-  _cwt_log_warn "Default worktree root requires $(_cwt_bold "$ignore_entry") in $(_cwt_bold '.gitignore')."
-  _cwt_log_error "Refusing to edit $(_cwt_bold '.gitignore') automatically. Add $(_cwt_bold "$ignore_entry") manually and rerun."
+  _cwt_log_warn "Default worktree root requires $(_cwt_bold "$ignore_entry") to be gitignored (local, global, or info/exclude)."
+  _cwt_log_error "Add $(_cwt_bold "$ignore_entry") to your gitignore and rerun."
   return 1
 }
 

tests/cwt_new.bats

@@ -58,12 +58,28 @@ teardown() {
     cwt new --no-launch ignore-check HEAD
   "
 	[ "$status" -eq 1 ]
-	[[ "$output" == *"Default worktree root requires .worktrees/ in .gitignore."* ]]
-	[[ "$output" == *"Refusing to edit .gitignore automatically."* ]]
+	[[ "$output" == *"Default worktree root requires .worktrees/ to be gitignored"* ]]
+	[[ "$output" == *"Add .worktrees/ to your gitignore and rerun."* ]]
 	[ ! -f "$REPO_DIR/.gitignore" ]
 	[ ! -d "$REPO_DIR/.worktrees/ignore-check" ]
 }
 
+@test "cwt new: accepts .worktrees/ ignored via .git/info/exclude" {
+	rm -f "$REPO_DIR/.gitignore"
+	mkdir -p "$REPO_DIR/.git/info"
+	printf ".worktrees/\n" >>"$REPO_DIR/.git/info/exclude"
+
+	run zsh -c "
+    export NO_COLOR=1
+    cd '$REPO_DIR'
+    source '$CWT_SH'
+    cwt new --no-launch info-exclude HEAD
+  "
+	[ "$status" -eq 0 ]
+	[[ "$output" == *"Worktree created"* ]] || [[ "$output" == *"Worktree ready"* ]]
+	[ -d "$REPO_DIR/.worktrees/info-exclude" ]
+}
+
 @test "cwt new: first-run wizard can save the default worktree root" {
 	local repo_real
 	repo_real="$(cd "$REPO_DIR" && pwd -P)"