The packets in Minecraft are made up of two sets, Client and Server packets. We have implemented most of the packets that we see as useful for scripting in breeze.
We have documented all packets as well as possible but we are limited to how much time we have. The guys from wiki.vg have infinite time. We highly recommend checking out their documentation of the 1.8.9 protocol here.
Missing a Packet? If you feel like your abilities to script are being limited by a packet that we have not implemented in our API yet. Feel free to contact us via discord, or github.