Yup. I already had a shortcut bound in Obsidian to pull up the daily page, so the KM workflow is just

    * switch to Specific Application -> Obsidian
    * pause until... application "Obsidian" is at the front
    * type keystroke -> Cmd+Option+D   ; go to daily page
    * type keystroke -> Cmd+DownArrow  ; move cursor to the bottom
    * type keystroke -> Return         ; start new bullet in existing list