run_in_terminal_pane.sh

#!/usr/bin/env bash

# Generic wrapper to run a command in the pane below the current one
# Usage: run_in_terminal_pane.sh <command> [args...]
# Assumes you're using the dev layout with a terminal pane below

HELIX_CWD="$(pwd)"

# Build the full command to run
full_command="$@"

# Move down to the terminal pane
zellij action move-focus down

# Write command to the now-focused pane
zellij action write-chars "cd '$HELIX_CWD' && $full_command"
zellij action write 13  # Send enter key (ASCII 13)