There are different categories of tools. You can design a house on paper, but you need e.g. mallets and wheelbarrows to build it; you can design software with

There are different categories of tools. You can design a house on paper, but you need e.g. mallets and wheelbarrows to build it; you can design software with "tools for thought", more or less computerized, but you need the automation offered by CI, version control etc. to handle the more concrete aspects properly.