How does the supply schedule stay transparent?

Malairte's supply schedule is written into the protocol and visible in the open source code. It defines the block reward, how that reward tapers or halves over time, the block interval, and any cap on total supply. Because the rules are enforced by every node, no single person can quietly mint extra coins or change the emission. You can read the schedule in the source, then reconcile it against the live chain by comparing reported circulating supply to the number of mined blocks times the reward. When those line up, you have confirmed that the coded schedule is the one the network actually enforces.