diff --git a/pom.xml b/pom.xml
index bbc8330..de780af 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,7 +62,7 @@
         <revision>${build.version}-SNAPSHOT</revision>
 
         <!-- This allows to change between versions. -->
-        <build.version>1.0.0</build.version>
+        <build.version>1.0.1</build.version>
         <!-- Revision variable removes warning about dynamic version -->
         <revision>${build.version}-SNAPSHOT</revision>
         <!-- Do not change unless you want different name for local builds. -->
diff --git a/src/main/java/world/bentobox/upgrades/DefaultUpgradeSeeder.java b/src/main/java/world/bentobox/upgrades/DefaultUpgradeSeeder.java
index 2974f8c..7ed76db 100644
--- a/src/main/java/world/bentobox/upgrades/DefaultUpgradeSeeder.java
+++ b/src/main/java/world/bentobox/upgrades/DefaultUpgradeSeeder.java
@@ -15,8 +15,15 @@
 import world.bentobox.upgrades.dataobjects.rewards.RangeRewardDB;
 import world.bentobox.upgrades.dataobjects.rewards.SpawnerRewardDB;
 
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Seeds 6 example upgrades for each hooked game mode on first install.
@@ -24,6 +31,8 @@
  */
 public class DefaultUpgradeSeeder {
 
+    private static final String SEEDED_FILE = ".seeded-gamemodes";
+
     private final UpgradesAddon addon;
 
     public DefaultUpgradeSeeder(UpgradesAddon addon) {
@@ -31,16 +40,68 @@ public DefaultUpgradeSeeder(UpgradesAddon addon) {
     }
 
     /**
-     * For each hooked game mode that has no upgrades configured, seed examples.
+     * For each hooked game mode that has no upgrades configured and has not
+     * been seeded before, seed examples. Tracks seeded game modes in a
+     * persistent marker file so deleted examples are not regenerated.
      */
     public void seedIfEmpty() {
+        Set<String> alreadySeeded = loadSeededGameModes();
         UpgradesDataManager dm = addon.getUpgradeDataManager();
+        boolean changed = false;
         for (String gm : addon.getHookedGameModes()) {
+            if (alreadySeeded.contains(gm)) {
+                continue;
+            }
             if (dm.getUpgradeDataByGameMode(gm).isEmpty()) {
                 seed(dm, gm);
                 addon.log("Seeded 8 example upgrades for " + gm
                         + " — edit or delete them via /[gamemode] admin upgrade");
             }
+            // Mark as seeded regardless — either we just seeded, or upgrades
+            // already existed. Either way, don't re-seed on future startups.
+            alreadySeeded.add(gm);
+            changed = true;
+        }
+        if (changed) {
+            saveSeededGameModes(alreadySeeded);
+        }
+    }
+
+    /**
+     * Load the set of game mode names that have already been seeded.
+     */
+    private Set<String> loadSeededGameModes() {
+        Set<String> seeded = new HashSet<>();
+        File file = new File(addon.getDataFolder(), SEEDED_FILE);
+        if (!file.exists()) {
+            return seeded;
+        }
+        try (BufferedReader reader = Files.newBufferedReader(file.toPath())) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String trimmed = line.trim();
+                if (!trimmed.isEmpty()) {
+                    seeded.add(trimmed);
+                }
+            }
+        } catch (IOException e) {
+            addon.logWarning("Could not read seeded game modes file: " + e.getMessage());
+        }
+        return seeded;
+    }
+
+    /**
+     * Persist the set of seeded game mode names.
+     */
+    private void saveSeededGameModes(Set<String> seeded) {
+        File file = new File(addon.getDataFolder(), SEEDED_FILE);
+        try (BufferedWriter writer = Files.newBufferedWriter(file.toPath())) {
+            for (String gm : seeded) {
+                writer.write(gm);
+                writer.newLine();
+            }
+        } catch (IOException e) {
+            addon.logWarning("Could not save seeded game modes file: " + e.getMessage());
         }
     }
 
diff --git a/src/main/java/world/bentobox/upgrades/UpgradesPladdon.java b/src/main/java/world/bentobox/upgrades/UpgradesPladdon.java
new file mode 100644
index 0000000..ce5c420
--- /dev/null
+++ b/src/main/java/world/bentobox/upgrades/UpgradesPladdon.java
@@ -0,0 +1,18 @@
+package world.bentobox.upgrades;
+
+import world.bentobox.bentobox.api.addons.Addon;
+import world.bentobox.bentobox.api.addons.Pladdon;
+
+public class UpgradesPladdon extends Pladdon {
+
+    private Addon addon;
+
+    @Override
+    public Addon getAddon() {
+        if (addon == null) {
+            addon = new UpgradesAddon();
+        }
+
+        return addon;
+    }
+}
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
new file mode 100644
index 0000000..56caf1b
--- /dev/null
+++ b/src/main/resources/plugin.yml
@@ -0,0 +1,9 @@
+name: BentoBox-Upgrades
+main: world.bentobox.upgrades.UpgradesPladdon
+version: ${project.version}${build.number}
+api-version: "1.21"
+
+authors: [tastybento]
+contributors: ["The BentoBoxWorld Community"]
+website: https://bentobox.world
+description: ${project.description}