diff --git a/Cargo.toml b/Cargo.toml
index 99b3179..ea2061c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,6 +31,7 @@ keyring     = "4"
 keyring-core = "1"
 reqwest     = { version = "0.13", features = ["json", "rustls", "rustls-native-certs"], default-features = false }
 arboard     = { version = "3", default-features = false }
+jni         = { version = "0.21", default-features = false }
 
 solitaire_core   = { path = "solitaire_core" }
 solitaire_sync   = { path = "solitaire_sync" }
diff --git a/solitaire_engine/Cargo.toml b/solitaire_engine/Cargo.toml
index 37fcc09..ebeaaf0 100644
--- a/solitaire_engine/Cargo.toml
+++ b/solitaire_engine/Cargo.toml
@@ -32,6 +32,9 @@ zip            = { workspace = true }
 [target.'cfg(not(target_os = "android"))'.dependencies]
 arboard        = { workspace = true }
 
+[target.'cfg(target_os = "android")'.dependencies]
+jni            = { workspace = true }
+
 [dev-dependencies]
 async-trait = { workspace = true }
 tempfile    = { workspace = true }
diff --git a/solitaire_engine/src/android_clipboard.rs b/solitaire_engine/src/android_clipboard.rs
new file mode 100644
index 0000000..99cbcd5
--- /dev/null
+++ b/solitaire_engine/src/android_clipboard.rs
@@ -0,0 +1,65 @@
+/// Android clipboard bridge via JNI.
+///
+/// Writes text to the system clipboard by calling into `ClipboardManager`
+/// through the JNI. Only compiled and linked on `target_os = "android"`.
+#[cfg(target_os = "android")]
+pub fn set_text(text: &str) -> Result<(), String> {
+    use bevy::android::ANDROID_APP;
+    use jni::{
+        objects::{JObject, JValue, JValueOwned},
+        JavaVM,
+    };
+
+    let app = ANDROID_APP
+        .get()
+        .ok_or_else(|| "ANDROID_APP not initialized".to_string())?;
+
+    // SAFETY: vm_as_ptr() returns the raw JavaVM* set up by the Android runtime.
+    let vm = unsafe { JavaVM::from_raw(app.vm_as_ptr().cast()) }
+        .map_err(|e| format!("JavaVM::from_raw: {e}"))?;
+
+    let mut env = vm
+        .attach_current_thread_permanently()
+        .map_err(|e| format!("attach_current_thread: {e}"))?;
+
+    // SAFETY: activity_as_ptr() is the NativeActivity jobject pointer —
+    // valid for the lifetime of the process.
+    let activity = unsafe { JObject::from_raw(app.activity_as_ptr() as _) };
+
+    (|| -> jni::errors::Result<()> {
+        // ClipboardManager cm = activity.getSystemService("clipboard")
+        let svc_name = JValueOwned::from(env.new_string("clipboard")?);
+        let cm = env
+            .call_method(
+                &activity,
+                "getSystemService",
+                "(Ljava/lang/String;)Ljava/lang/Object;",
+                &[svc_name.borrow()],
+            )?
+            .l()?;
+
+        // ClipData clip = ClipData.newPlainText("link", text)
+        let label = JValueOwned::from(env.new_string("link")?);
+        let java_text = JValueOwned::from(env.new_string(text)?);
+        let clip_class = env.find_class("android/content/ClipData")?;
+        let clip = env
+            .call_static_method(
+                &clip_class,
+                "newPlainText",
+                "(Ljava/lang/CharSequence;Ljava/lang/CharSequence;)Landroid/content/ClipData;",
+                &[label.borrow(), java_text.borrow()],
+            )?
+            .l()?;
+
+        // cm.setPrimaryClip(clip)
+        let clip_val = JValueOwned::Object(clip);
+        env.call_method(
+            &cm,
+            "setPrimaryClip",
+            "(Landroid/content/ClipData;)V",
+            &[clip_val.borrow()],
+        )?
+        .v()
+    })()
+    .map_err(|e| format!("clipboard JNI: {e}"))
+}
diff --git a/solitaire_engine/src/lib.rs b/solitaire_engine/src/lib.rs
index 8398ba9..30b82ea 100644
--- a/solitaire_engine/src/lib.rs
+++ b/solitaire_engine/src/lib.rs
@@ -1,5 +1,7 @@
 //! Bevy integration layer for Solitaire Quest.
 
+#[cfg(target_os = "android")]
+pub mod android_clipboard;
 pub mod assets;
 pub mod card_animation;
 pub mod achievement_plugin;
@@ -12,6 +14,7 @@ pub mod feedback_anim_plugin;
 pub mod challenge_plugin;
 pub mod cursor_plugin;
 pub mod daily_challenge_plugin;
+pub mod difficulty_plugin;
 pub mod diagnostics_hud;
 pub mod events;
 pub mod game_plugin;
@@ -93,11 +96,13 @@ pub use events::{
     ForfeitEvent, ForfeitRequestEvent, FoundationCompletedEvent, GameWonEvent, HelpRequestEvent,
     HintVisualEvent, InfoToastEvent, ManualSyncRequestEvent, MoveRejectedEvent, MoveRequestEvent,
     NewGameRequestEvent, PauseRequestEvent, StartChallengeRequestEvent,
-    StartDailyChallengeRequestEvent, StartPlayBySeedRequestEvent, StartTimeAttackRequestEvent,
-    StartZenRequestEvent, StateChangedEvent, SyncCompleteEvent, ToggleAchievementsRequestEvent,
-    ToggleLeaderboardRequestEvent, ToggleProfileRequestEvent, ToggleSettingsRequestEvent,
-    ToggleStatsRequestEvent, UndoRequestEvent, WinStreakMilestoneEvent, XpAwardedEvent,
+    StartDailyChallengeRequestEvent, StartDifficultyRequestEvent, StartPlayBySeedRequestEvent,
+    StartTimeAttackRequestEvent, StartZenRequestEvent, StateChangedEvent, SyncCompleteEvent,
+    ToggleAchievementsRequestEvent, ToggleLeaderboardRequestEvent, ToggleProfileRequestEvent,
+    ToggleSettingsRequestEvent, ToggleStatsRequestEvent, UndoRequestEvent,
+    WinStreakMilestoneEvent, XpAwardedEvent,
 };
+pub use difficulty_plugin::{DifficultyIndexResource, DifficultyPlugin};
 pub use play_by_seed_plugin::{PlayBySeedPlugin, PlayBySeedScreen};
 pub use game_plugin::{
     ConfirmNewGameScreen, GameMutation, GameOverScreen, GamePlugin, GameStatePath, RecordingReplay,
diff --git a/solitaire_engine/src/stats_plugin.rs b/solitaire_engine/src/stats_plugin.rs
index 42965d2..fb3f479 100644
--- a/solitaire_engine/src/stats_plugin.rs
+++ b/solitaire_engine/src/stats_plugin.rs
@@ -361,9 +361,13 @@ fn handle_copy_share_link_button(
     }
     #[cfg(target_os = "android")]
     {
-        toast.write(InfoToastEvent(format!(
-            "Share link: {url}"
-        )));
+        match crate::android_clipboard::set_text(&url) {
+            Ok(()) => toast.write(InfoToastEvent(format!("Copied: {url}"))),
+            Err(e) => {
+                warn!("android clipboard failed: {e}");
+                toast.write(InfoToastEvent(format!("Share link: {url}")));
+            }
+        }
     }
 }