Document TaggedMessage and correct which messages travel tagged 0x038C is TaggedMessage, verified to its fields: one message under a tag fixed by its opcode. The client sends tagged messages before the world as well as in it, and sends others on their own, so pregame isn't untagged as the pages said. What each tag stands for is our reading, not yet verified. Counts from run 39006780626: 48 read to fields, 1,071 unverified.
Move step 3's first systems onto design pages of their own Step 3's first stage is approved and being built, so the host, gateway, owners, persistence, command layer and harness get their own design pages, moved off Server core design with their knobs and rejected ideas, and filled in from the stage's plan. The map scheduler and timer wheel stay until the map side is planned. Home, the sidebar and Roadmap's step 3 point at them.