Firekeeping: shared guild fires

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -11,7 +11,7 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
 
 - **Skills:** mining, woodcutting, farming, hunting, fishing, smithing,
   jewelcrafting, construction (with masonry), cooking, leatherworking, tailoring, herblore,
-  combat, prayer and reconnaissance. Smiths also make hardware for builders,
+  firekeeping, combat, prayer and reconnaissance. Smiths also make hardware for builders,
   one kind per metal (copper rivets to rune locks), which fittings and
   buildings need.
 - **Combat:** every fight is played out swing by swing: you and the enemy
@@ -76,7 +76,7 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
 - **Classes are trades,** from gathering to finished goods, so each player has
   a quiet gathering side and a busier crafting side: miner (mining, smithing,
   jewelcrafting),
-  builder (woodcutting, construction), homesteader (farming, cooking,
+  builder (woodcutting, construction, firekeeping), homesteader (farming, cooking,
   herblore, tailoring) and ranger (hunting, fishing, leatherworking,
   cooking). A trade's skills are 20% faster, 1 in 10 of its crafts make
   double, and each has one bonus of its own. Homesteaders farm differently:
@@ -120,6 +120,16 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
   potions a 10–35% chance to keep materials, Prayer more points from bones,
   and combat has Strength and Defence ladders. Potions last 50 uses, one per
   skill at a time; an empty one is replaced from the bank automatically.
+- **Firekeeping:** the guild shares four fires: the forge (bars), the kitchen
+  fire (cooking), the kiln (bricks) and the still (potions). Every craft at a
+  fire takes one log of its tier as fuel; a fire burning that tier's flame or
+  hotter pays it, and a hot forge takes a coal off every bar (never the last).
+  Anyone can tend any fire: each go feeds one log, for minutes of fire and XP
+  that grow with level, and stops when the fire is full. Better logs burn
+  hotter colours (red, gold, white, blue, green, violet), burn first, and push
+  cheaper fuel out of a full fire. Whoever fed the fuel gets 10% of the XP of
+  every craft it pays for. Because the fires are shared, the server runs
+  everyone's actions as time passes, not only when they next look.
 - **Events:** raids are announced a day or two ahead. Reconnaissance from
   scouts, informants and the spymaster's guild narrows down when, how strong,
   and finally where their camp is, so fighters can sabotage it. Fighters can