libtmux:new-window

Create a physical window in captured SESSION and return a COMMAND-OUTCOME. NAME and CWD are literal strings. INDEX chooses a free link index; omission uses tmux's next available index. DETACHED defaults true. ENVIRONMENT is a list/vector of (name . value) string pairs. COMMAND is nonempty argv; SHELL-COMMAND is a separate, mutually exclusive shell string. Omit both for tmux's default shell. OUTCOME-VALUE supplies the resulting window; observation failure is separate. Never replaces an occupied index or retries a mutation. Limits cover all I/O.