Build and change a Cube semantic model

Writes state. The API rejects file writes on any branch that is not a dev-mode branch, so the branch dance below is not optional ceremony — skip it and every write fails.

Preflight

command -v cube >/dev/null || echo "Cube CLI not installed: curl -fsSL https://raw.githubusercontent.com/cube-js/cube/master/install-cli.sh | sh"
cube whoami || echo "Not authenticated. Interactive: cube login. Headless: set CUBE_API_URL + CUBE_API_KEY."
cube context list   # confirm the tenant before writing anything

Read before you write

Never author against an assumed model. Pull the current state first: