Six tiers of ore, trees, hides and gear; dragons; tier tabs

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

README.md

@@ -14,9 +14,13 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
 - **Combat:** fights cost HP (less when out-levelled or armoured); below half
   health you eat food from your bank, and out of food you retreat, losing
   nothing but the fight. HP recovers 25% an hour.
-- **Gear and tools:** smiths make weapons, copper and iron armour, and tools
-  (pickaxe, axe, hoe, fishing rod, hunting knife) that make gathering 15–30%
-  faster; leatherworkers turn hides into leather armour.
+- **Tiers:** six RuneScape-style tiers (copper, iron, steel, mithril,
+  adamant, rune at levels 1–75) of ore, trees (up to magic) and hides (deer,
+  boar and bear from hunting; green, blue and red dragonhide from fighting
+  dragons). Every metal tier has a sword, shield, helmet, greaves, cuirass and
+  five tools; every leather tier a cap, trousers and jerkin. Higher bars need
+  coal; each metal past copper needs a Smithy level (rune needs level 5, so a
+  city). Gear needs a combat level to wear, tools a skill level to use.
 - **Classes:** warrior, scout, artisan, pioneer. Every class can train every
   skill; a class makes some skills 20% faster and has one signature ability.
 - **Bank:** 12 slots of up to 1,000 each to start. When something doesn't