J3b: chat, the player list (with each player's land) and admin commands across lands; sleep needs everyone in every land, with a 'waiting for everyone else' message

docs/WORLDLETS_DESIGN.md

@@ -36,9 +36,28 @@ player list across lands are J3b). The rest is planned.
 - `tests/test_net_lands.gd`: Alice digs and props online, lights it,
   crosses to the Cove (bag and day kept) while Bob stays in the Valley,
   comes back up, then leaves from the Cove and rejoining sends her there.
-- Next, J3b: chat, the player list (with where each player is) and admin
-  commands across lands; sleeping needs everyone in every land. J3c: a land
-  server crashing, the Host page's extra ports.
+
+*As built in J3b (everyone, everywhere):*
+- Chat and server messages go to every land (`Chat._all` relays through
+  the hub, `Lands.relay_line`).
+- The hub keeps the **roster** (everyone on every land, with their land);
+  every land and every player's game gets it (`Net.roster`,
+  `Net.everyone()`): the pause menu's player list and `/players` show
+  where each player is.
+- Commands typed in another land run **on the hub** (it alone keeps
+  server.json) and answer back there; after one that changes server.json
+  (`/set`, `/ban`, `/admin`, `/friend`...) every land reloads it.
+  `/kick` and `/ban` reach the land the player's in; `/weather`, `/save`
+  and `/backup` reach every land.
+- **Sleep needs everyone in every land:** land servers report their beds,
+  the hub decides, and every land passes the night together. Getting into
+  bed while others are up: "You're in bed: waiting for everyone else to go
+  to bed (1 of 2 asleep)", and every land hears "Bob is in bed (1 of 2
+  asleep)" in chat.
+- `tests/test_net_lands.gd` covers it all, Alice in the Cove and Bob in the
+  Valley.
+- Next, J3c: a land server crashing (its players back to the hub), and the
+  Host page's extra ports.
 
 *As built in J1:*
 - `scripts/world/tunnel.gd`: the seam (an outcrop on the clifftop strip,