Fix.

buildSrc/src/main/kotlin/eternalcombat-java-unit-test.gradle.kts

@@ -7,6 +7,7 @@ dependencies {
     testImplementation("org.junit.jupiter:junit-jupiter-api:${Versions.JUNIT_JUPITER_API}")
     testImplementation("org.junit.jupiter:junit-jupiter-params:${Versions.JUNIT_JUPITER_PARAMS}")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:${Versions.JUNIT_JUPITER_ENGINE}")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher:6.0.2")
 }
 
 tasks.test {

eternalcombat-plugin/build.gradle.kts

@@ -4,6 +4,7 @@ import org.gradle.kotlin.dsl.shadowJar
 
 plugins {
     `eternalcombat-java`
+    `eternalcombat-java-unit-test`
     `eternalcombat-repositories`
 
     id("net.minecrell.plugin-yml.bukkit")

eternalcombat-plugin/src/main/java/com/eternalcode/combat/CombatPlugin.java

@@ -11,6 +11,7 @@ import com.eternalcode.combat.crystalpvp.EndCrystalListener;
 import com.eternalcode.combat.fight.controller.FightBypassAdminController;
 import com.eternalcode.combat.fight.controller.FightBypassCreativeController;
 import com.eternalcode.combat.fight.controller.FightBypassPermissionController;
+import com.eternalcode.combat.fight.controller.FightCommandController;
 import com.eternalcode.combat.fight.controller.FightInventoryController;
 import com.eternalcode.combat.fight.drop.DropKeepInventoryService;
 import com.eternalcode.combat.fight.FightManager;
@@ -180,6 +181,7 @@ public final class CombatPlugin extends JavaPlugin implements EternalCombatApi {
             new FightBypassPermissionController(server, pluginConfig),
             new FightBypassCreativeController(server, pluginConfig),
             new FightActionBlockerController(this.fightManager, noticeService, pluginConfig, server),
+            new FightCommandController(this.fightManager, noticeService, pluginConfig),
             new FightPearlController(pluginConfig.pearl, noticeService, this.fightManager, this.fightPearlService),
             new UpdaterNotificationController(updaterService, pluginConfig, this.audienceProvider, miniMessage),
             new KnockbackRegionController(noticeService, this.regionProvider, this.fightManager, knockbackService, server),

eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightActionBlockerController.java

@@ -1,7 +1,6 @@
 package com.eternalcode.combat.fight.controller;
 
 import com.eternalcode.combat.config.implementation.PluginConfig;
-import com.eternalcode.combat.WhitelistBlacklistMode;
 import com.eternalcode.combat.config.implementation.BlockPlacementSettings;
 import com.eternalcode.combat.fight.FightManager;
 import com.eternalcode.combat.fight.event.FightUntagEvent;
@@ -16,15 +15,11 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.block.BlockPlaceEvent;
 import org.bukkit.event.entity.EntityDamageEvent;
 import org.bukkit.event.entity.EntityToggleGlideEvent;
-import org.bukkit.event.inventory.InventoryOpenEvent;
-import org.bukkit.event.inventory.InventoryType;
-import org.bukkit.event.player.PlayerCommandPreprocessEvent;
 import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.event.player.PlayerToggleFlightEvent;
 
 import java.util.List;
 import java.util.UUID;
-import org.bukkit.util.StringUtil;
 
 public class FightActionBlockerController implements Listener {
 
@@ -186,31 +181,4 @@ public class FightActionBlockerController implements Listener {
         }
     }
 
-    @EventHandler
-    void onPlayerCommandPreprocess(PlayerCommandPreprocessEvent event) {
-        Player player = event.getPlayer();
-        UUID playerUniqueId = player.getUniqueId();
-
-        if (!this.fightManager.isInCombat(playerUniqueId)) {
-            return;
-        }
-
-        String command = event.getMessage().substring(1);
-
-        boolean isAnyMatch = this.config.commands.restrictedCommands.stream()
-            .anyMatch(restrictedCommand -> StringUtil.startsWithIgnoreCase(command, restrictedCommand));
-
-        WhitelistBlacklistMode mode = this.config.commands.commandRestrictionMode;
-
-        boolean shouldCancel = mode.shouldBlock(isAnyMatch);
-
-        if (shouldCancel) {
-            event.setCancelled(true);
-            this.noticeService.create()
-                .player(playerUniqueId)
-                .notice(this.config.messagesSettings.commandDisabledDuringCombat)
-                .send();
-
-        }
-    }
 }

eternalcombat-plugin/src/main/java/com/eternalcode/combat/fight/controller/FightCommandController.java

@@ -0,0 +1,114 @@
+package com.eternalcode.combat.fight.controller;
+
+import com.eternalcode.combat.WhitelistBlacklistMode;
+import com.eternalcode.combat.config.implementation.PluginConfig;
+import com.eternalcode.combat.fight.FightManager;
+import com.eternalcode.combat.notification.NoticeService;
+import java.util.List;
+import java.util.UUID;
+import java.util.regex.Pattern;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerCommandPreprocessEvent;
+
+public class FightCommandController implements Listener {
+
+    private static final char SLASH = '/';
+    private static final char NAMESPACE_SEPARATOR = ':';
+    private static final char SPACE = ' ';
+    private static final String EMPTY = "";
+    private static final String SINGLE_SPACE = " ";
+    private static final Pattern WHITESPACE_PATTERN = Pattern.compile("\\s+");
+
+    private final FightManager fightManager;
+    private final NoticeService noticeService;
+    private final PluginConfig config;
+
+    public FightCommandController(FightManager fightManager, NoticeService noticeService, PluginConfig config) {
+        this.fightManager = fightManager;
+        this.noticeService = noticeService;
+        this.config = config;
+    }
+
+    static String normalizeCommand(String command) {
+        if (command == null || command.isBlank()) {
+            return EMPTY;
+        }
+
+        String normalized = command.strip();
+
+        if (normalized.charAt(0) == SLASH) {
+            normalized = normalized.substring(1).stripLeading();
+        }
+
+        if (normalized.isEmpty()) {
+            return EMPTY;
+        }
+
+        int colonIndex = normalized.indexOf(NAMESPACE_SEPARATOR);
+        int firstSpaceIndex = normalized.indexOf(SPACE);
+
+        if (colonIndex >= 0 && (firstSpaceIndex < 0 || colonIndex < firstSpaceIndex)) {
+            normalized = normalized.substring(colonIndex + 1);
+        }
+
+        return WHITESPACE_PATTERN.matcher(normalized).replaceAll(SINGLE_SPACE);
+    }
+
+    static boolean matches(String command, List<String> restrictedCommands) {
+        if (command.isEmpty()) {
+            return false;
+        }
+
+        for (String restrictedCommand : restrictedCommands) {
+            String normalizedRestricted = normalizeCommand(restrictedCommand);
+
+            if (normalizedRestricted.isEmpty()) {
+                continue;
+            }
+
+            boolean exactMatch = command.equalsIgnoreCase(normalizedRestricted);
+            boolean prefixMatch = command.regionMatches(true, 0, normalizedRestricted, 0, normalizedRestricted.length())
+                && command.length() > normalizedRestricted.length()
+                && command.charAt(normalizedRestricted.length()) == SPACE;
+
+            if (exactMatch || prefixMatch) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    void onPlayerCommandPreprocess(PlayerCommandPreprocessEvent event) {
+        Player player = event.getPlayer();
+        UUID uniqueId = player.getUniqueId();
+
+        if (!this.fightManager.isInCombat(uniqueId)) {
+            return;
+        }
+
+        String command = normalizeCommand(event.getMessage());
+
+        if (command.isEmpty()) {
+            return;
+        }
+
+        boolean matched = matches(command, this.config.commands.restrictedCommands);
+
+        WhitelistBlacklistMode mode = this.config.commands.commandRestrictionMode;
+
+        if (!mode.shouldBlock(matched)) {
+            return;
+        }
+
+        event.setCancelled(true);
+        this.noticeService.create()
+            .player(uniqueId)
+            .notice(this.config.messagesSettings.commandDisabledDuringCombat)
+            .send();
+    }
+}

eternalcombat-plugin/test/com/eternalcode/combat/fight/controller/FightCommandControllerTest.java

@@ -0,0 +1,38 @@
+package com.eternalcode.combat.fight.controller;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+class FightCommandControllerTest {
+
+    @Test
+    void normalizeCommand_stripsSlashAndNamespace_collapsesWhitespace() {
+        assertEquals("tp Steve", FightCommandController.normalizeCommand("/minecraft:tp Steve"));
+        assertEquals("home set 1", FightCommandController.normalizeCommand("/home   set   1"));
+        assertEquals("spawn", FightCommandController.normalizeCommand("/spawn"));
+        assertEquals("", FightCommandController.normalizeCommand("/   "));
+        assertEquals("", FightCommandController.normalizeCommand(null));
+    }
+
+    @Test
+    void matches_exactAndPrefixMatch_caseInsensitive() {
+        List<String> restricted = List.of("home set", "tp", "  ", "/minecraft:msg admin");
+
+        assertTrue(FightCommandController.matches("home set", restricted));
+        assertTrue(FightCommandController.matches("home set 1", restricted));
+
+        assertTrue(FightCommandController.matches("TP", restricted));
+        assertTrue(FightCommandController.matches("tp Steve", restricted));
+
+        assertTrue(FightCommandController.matches("msg admin", restricted));
+        assertTrue(FightCommandController.matches("msg admin hello", restricted));
+
+        assertFalse(FightCommandController.matches("home setup", restricted));
+        assertFalse(FightCommandController.matches("tpper", restricted));
+        assertFalse(FightCommandController.matches("", restricted));
+    }
+}