Can't post the specifics but something like this as a bash script, if you have any Qs LMK:

#!/usr/bin/env bash

tmux new-session -d -s sessionname

tmux rename-window todo

tmux send-keys -t todo "vim todo" Enter

tmux new-window -d -n dot

tmux send-keys -t dot "cd " Enter

tmux new-window -d -n windowname

tmux send-keys -t windowname "cd ~/reponame" Enter

tmux send-keys -t windowname "commands to run" Enter

tmux attach-session -d -t sessionname