set tmux pane width in tmux and tmuxp

solution.md

bash:

$ tmux set-window-option main-pane-width 20; tmux select-layout main-vertical

---

tmuxp:

session_name: DB
windows:
  - window_name: Prod
    layout: main-vertical
    focus: True
    options:
      main-pane-width: 30
    panes:session_name: DB
windows:
  - window_name: Prod
    layout: main-vertical
    focus: True
    options:
      main-pane-width: 30
    panes:
      - shell_command:
        - echo table
        - tmux select-layout main-vertical
      - shell_command:
        - echo sql
      - shell_command:
        - echo table
        - tmux select-layout main-vertical
      - shell_command:
        - echo sql

Resource: https://devel.tech/tips/n/tMuXrSz9/resize-tmux-main-panes-by-percentage