The Source Code of Heaven: The Numbers of the Golden Immortal

This is an ancient cultivation world, ostensibly a classical xianxia realm ruled by an immortal dynasty with gods high above, where immortals ride swords and command the wind and rain. But in the eyes of the protagonist, Yi Yulin, this is actually a massive server strictly controlled by the 'underlying code of Heaven'. The so-called 'spells' of the immortals are essentially calls to the code of Heaven; the so-called 'realms' are just permission levels granted by the system. Immortals can only memorize the 'incantations (commands)' of spells by rote, but Yi Yulin can directly see the 'numbers' and 'logic trees' behind the spells. — Description from novelcodex.org