fix(felling): support copper axes

README.md

@@ -91,7 +91,7 @@ Player preferences, administrative locks, progress, unlocks, and known names are
 
 Tree detection searches matching natural trunk blocks laterally and upward, never below the initiating chop, and requires corresponding foliage or caps. Search bounds prevent unbounded traversal. Leaves, caps, roots, vines, and decorations are not automatically broken.
 
-Additional trunk blocks use Spigot's `Player.breakBlock` path so block-break cancellation, drops, experience, enchantments, and axe durability remain authoritative. Protection plugins should cancel `BlockBreakEvent` normally. A cancelled additional break stops the remaining felling.
+Automatic felling supports Spigot 26.2 wooden, stone, copper, iron, golden, diamond, and netherite axes. Additional trunk blocks use Spigot's `Player.breakBlock` path so block-break cancellation, drops, experience, enchantments, and axe durability remain authoritative. Protection plugins should cancel `BlockBreakEvent` normally. A cancelled additional break stops the remaining felling.
 
 ## Releases
 

design/log.md

@@ -2,6 +2,12 @@
 
 ## 2026-08-11
 
+### US-003 copper axe support corrected
+
+- Reproduced copper axes failing automatic-felling eligibility because the explicit Spigot 26.2 axe-material set omitted `COPPER_AXE`.
+- Added copper axes alongside wooden, stone, iron, golden, diamond, and netherite axes without broadening eligibility to pickaxes or other tools.
+- Verified copper-axe classification, end-to-end felling activation, non-axe rejection, and the complete build with `./gradlew clean check jar`.
+
 ### US-001 disrupted-tree progress corrected
 
 - Reproduced remaining lower logs failing to count after an upper trunk block was removed because progression unnecessarily re-ran full intact-tree validation.

design/user-stories/us-003-fell-unlocked-trees.md

@@ -11,7 +11,7 @@ As a **player with an unlocked species**, I want its trees to break progressivel
 
 ## Acceptance criteria
 
-- [x] Automatic felling is considered only for a non-cancelled Survival-mode block break made with an axe against a species the player has unlocked.
+- [x] Automatic felling is considered only for a non-cancelled Survival-mode block break made with a supported wooden, stone, copper, iron, golden, diamond, or netherite axe against a species the player has unlocked.
 - [x] Sneaking when the initiating block is broken always bypasses automatic felling and leaves the ordinary single-block break intact.
 - [x] A disabled or administratively locked player receives the ordinary single-block break without automatic felling.
 - [x] Tree detection follows connected blocks of the initiating trunk family laterally and upward, including diagonal branches, but never follows trunk blocks below the initiating block.

src/main/java/games/dmg/treefeller/TreeTools.java

@@ -9,6 +9,7 @@ public final class TreeTools {
     private static final Set<Material> AXES = EnumSet.of(
             Material.WOODEN_AXE,
             Material.STONE_AXE,
+            Material.COPPER_AXE,
             Material.IRON_AXE,
             Material.GOLDEN_AXE,
             Material.DIAMOND_AXE,

src/test/java/games/dmg/treefeller/TreeFellingListenerTest.java

@@ -35,7 +35,7 @@ class TreeFellingListenerTest {
         when(player.getName()).thenReturn("Player");
         when(player.getGameMode()).thenReturn(GameMode.SURVIVAL);
         when(player.getInventory()).thenReturn(inventory);
-        when(inventory.getItemInMainHand()).thenReturn(new ItemStack(Material.IRON_AXE));
+        when(inventory.getItemInMainHand()).thenReturn(new ItemStack(Material.COPPER_AXE));
         TreeStructure tree = new TreeStructure(
                 TreeSpecies.OAK, List.of(new BlockPoint(0, 0, 0), new BlockPoint(0, 1, 0)));
         PlayerTreeFellerState eligible = PlayerTreeFellerState.initial(playerId, "Player")

src/test/java/games/dmg/treefeller/TreeToolsTest.java

@@ -11,6 +11,7 @@ class TreeToolsTest {
     void acceptsAxesButNotPickaxesOrOtherItems() {
         assertTrue(TreeTools.isAxe(Material.WOODEN_AXE));
         assertTrue(TreeTools.isAxe(Material.GOLDEN_AXE));
+        assertTrue(TreeTools.isAxe(Material.COPPER_AXE));
         assertTrue(TreeTools.isAxe(Material.NETHERITE_AXE));
         assertFalse(TreeTools.isAxe(Material.DIAMOND_PICKAXE));
         assertFalse(TreeTools.isAxe(Material.AIR));