Merge dev: Euchre bidding fix, trick sweep, branding, menu filtering

Publishes a production release carrying everything since v1.0.2.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015qjfMiPUDshdKEUa6vxqzN

README.md

@@ -12,7 +12,11 @@ The app shell is complete and two games are playable end to end:
 | **Playable** | Euchre, Sequence |
 | **Listed, not yet implemented** | Kaiser, President, Golf, Wizard, Crazy 8s, Mastermind, Backgammon, Chess, Checkers |
 
-Unimplemented games appear in the menu marked *Coming soon*. Adding one means
+Unimplemented games appear in the menu marked *Coming soon* **on dev builds
+only** — a production release lists just the games that can actually be played,
+so nobody installs it and taps into a dead end. The menu decides this from the
+installed APK's own version name, so it follows the build rather than the
+channel selected for future updates. Adding one means
 writing a `GameRules` implementation, a `GameAi`, and a screen, then flipping
 `available` in `GameCatalog` — the menu, lobby, networking, settings and OTA
 layers are game-agnostic and need no changes.
@@ -53,6 +57,31 @@ them.
   - **Production** — stable builds, published from `main`.
   - **Dev** — preview builds, published from `dev` on every green CI run.
 
+## Branding
+
+The launcher icon is a single square of the Wallace tartan, and the app opens on
+a tartan splash carrying the name in a Celtic uncial hand for two seconds before
+fading into the menu.
+
+The tartan is drawn, not an image: `ui/theme/Tartan.kt` lays the sett down as
+warp and then as weft at half opacity, which is what produces the blended
+squares instead of a flat grid. The icon is the same construction as a vector
+drawable, so it stays sharp at every density and needs no PNGs.
+
+Two honest caveats:
+
+- **The sett is an approximation.** `WallaceSett` reproduces what the Wallace
+  tartan reads as — a bold red and black check divided by a narrow gold
+  overstripe — but the registered threadcount could not be verified, so the
+  numbers were chosen to look right rather than to be authoritative. They are
+  plain data; replacing them with the registered counts rebrands the whole app
+  and needs no other change.
+- **The typeface is bundled under a licence.** Uncial Antiqua, © 2011 Brian J.
+  Bonislawsky DBA Astigmatic, Reserved Font Name "Uncial Antiqua", used under
+  the SIL Open Font License 1.1. The full licence is at
+  [docs/licenses/UncialAntiqua-OFL.txt](docs/licenses/UncialAntiqua-OFL.txt) and
+  must stay with the font — the OFL requires it to be distributed alongside.
+
 ## Screen sizes
 
 There are no fixed orientations or hard-coded card sizes. Layouts measure the

app/src/main/java/org/prolibertate/games/game/Catalog.kt

@@ -154,6 +154,22 @@ object GameCatalog {
 
     fun byId(id: String): GameDescriptor? = all.firstOrNull { it.id == id }
 
-    fun byCategory(category: GameCategory): List<GameDescriptor> =
-        all.filter { it.category == category }
+    /**
+     * Games in a category.
+     *
+     * [includeComingSoon] is what separates the two update channels: a dev
+     * build lists everything, including the games that are still only entries
+     * in this table, so the roadmap is visible while working on it. A
+     * production build lists only what can actually be played, so nobody
+     * downloads a release and taps into a dead end.
+     */
+    fun byCategory(
+        category: GameCategory,
+        includeComingSoon: Boolean = true,
+    ): List<GameDescriptor> = all.filter {
+        it.category == category && (includeComingSoon || it.available)
+    }
+
+    /** Everything currently playable, regardless of category. */
+    val playable: List<GameDescriptor> get() = all.filter { it.available }
 }

app/src/main/java/org/prolibertate/games/game/euchre/EuchreAi.kt

@@ -16,14 +16,20 @@ import org.prolibertate.games.game.engine.GameAi
 class EuchreAi(private val difficulty: Difficulty = Difficulty.NORMAL) :
     GameAi<EuchreState, EuchreMove> {
 
+    /**
+     * Thresholds are calibrated against the score an average five-card hand
+     * earns from [handValue], which sits around 11. A threshold near that mean
+     * means every seat bids and the card is never turned down — see
+     * EuchreBiddingRateTest, which pins the resulting order-up rate.
+     */
     enum class Difficulty(val bidThreshold: Int, val aloneThreshold: Int) {
         /** Bids loosely and plays straightforwardly. */
-        EASY(bidThreshold = 7, aloneThreshold = 26),
+        EASY(bidThreshold = 21, aloneThreshold = 32),
 
-        NORMAL(bidThreshold = 9, aloneThreshold = 24),
+        NORMAL(bidThreshold = 24, aloneThreshold = 32),
 
         /** Bids tighter and is harder to sneak a trick past. */
-        CAUTIOUS(bidThreshold = 11, aloneThreshold = 22),
+        CAUTIOUS(bidThreshold = 27, aloneThreshold = 31),
     }
 
     override fun chooseMove(state: EuchreState, seat: Int, legal: List<EuchreMove>): EuchreMove {
@@ -47,19 +53,25 @@ class EuchreAi(private val difficulty: Difficulty = Difficulty.NORMAL) :
      */
     private fun handValue(hand: List<Card>, trump: Suit): Int {
         var value = 0
+        var trumpCount = 0
         for (card in hand) {
             value += when {
-                isRightBower(card, trump) -> 9
-                isLeftBower(card, trump) -> 7
-                isTrumpCard(card, trump) -> 3 + (card.rank.order - Rank.NINE.order) / 2
+                isRightBower(card, trump) -> 10
+                isLeftBower(card, trump) -> 8
+                isTrumpCard(card, trump) -> 4 + (card.rank.order - Rank.NINE.order) / 2
                 card.rank == Rank.ACE -> 3
                 card.rank == Rank.KING -> 1
                 else -> 0
             }
+            if (isTrumpCard(card, trump)) trumpCount++
         }
-        // A void in a side suit means an early chance to trump in.
+        // A void is a chance to trump in — but only while there is trump left
+        // to do it with. Counting voids on a trumpless hand was inflating
+        // exactly the weak hands that should be passing.
+        if (trumpCount >= 2) {
             val sideSuits = Suit.entries.filter { it != trump }
             value += sideSuits.count { suit -> hand.none { effectiveSuit(it, trump) == suit } } * 2
+        }
         return value
     }
 

app/src/main/java/org/prolibertate/games/game/euchre/EuchreModel.kt

@@ -70,6 +70,12 @@ data class EuchreState(
     val turn: Int,
     val passes: Int,
     val trick: List<PlayedCard>,
+    /**
+     * The trick that has just been won, kept on the table so it can be read and
+     * then animated away. Cleared as soon as the next card is played. Winner is
+     * [lastTrickWinner].
+     */
+    val completedTrick: List<PlayedCard> = emptyList(),
     val leader: Int,
     val tricksWon: List<Int>,
     /** Two entries: team 0 is seats 0 and 2, team 1 is seats 1 and 3. */

app/src/main/java/org/prolibertate/games/game/euchre/EuchreRules.kt

@@ -277,6 +277,7 @@ object EuchreRules : GameRules<EuchreState, EuchreMove> {
             leader = leader,
             turn = leader,
             trick = emptyList(),
+            completedTrick = emptyList(),
             passes = 0,
         )
     }
@@ -285,7 +286,8 @@ object EuchreRules : GameRules<EuchreState, EuchreMove> {
         val hands = state.hands.toMutableList()
         hands[seat] = hands[seat] - card
         val trick = state.trick + PlayedCard(seat, card)
-        val played = state.copy(hands = hands, trick = trick)
+        // Playing to a new trick sweeps the previous one off the table.
+        val played = state.copy(hands = hands, trick = trick, completedTrick = emptyList())
 
         if (trick.size < state.activeSeatCount) {
             return played.copy(turn = nextActive(state, seat))
@@ -300,6 +302,9 @@ object EuchreRules : GameRules<EuchreState, EuchreMove> {
 
         val afterTrick = played.copy(
             trick = emptyList(),
+            // Held so the finished trick can be seen before it is cleared away,
+            // rather than the fourth card vanishing the instant it lands.
+            completedTrick = trick,
             tricksWon = tricksWon,
             leader = winner,
             turn = winner,

app/src/main/java/org/prolibertate/games/net/MatchController.kt

@@ -41,6 +41,12 @@ class MatchController<S : Any, M : Any>(
     private val advanceIdle: (S) -> S? = { null },
     /** Scaled by the animation-speed setting so the table paces itself. */
     private val aiThinkingMillis: () -> Long = { 700L },
+    /**
+     * Extra pause before the next move is made, given the current state. Lets a
+     * game hold a finished trick on the table long enough to be read before the
+     * next card lands on top of it.
+     */
+    private val holdBeforeNextMove: (S) -> Long = { 0L },
 ) {
 
     enum class Role { HOST, CLIENT }
@@ -207,7 +213,7 @@ class MatchController<S : Any, M : Any>(
 
             if (seatKinds[seat] != PlayerKind.AI) return // a person's turn
 
-            delay(aiThinkingMillis())
+            delay(holdBeforeNextMove(current) + aiThinkingMillis())
             val chosen = lock.withLock {
                 val live = authoritative ?: return
                 if (rules.currentSeat(live) != seat) return@withLock null

app/src/main/java/org/prolibertate/games/settings/SettingsRepository.kt

@@ -25,10 +25,23 @@ data class Settings(
     val soundEnabled: Boolean = true,
     val animationSpeed: Float = 1.0f,
     val checkForUpdatesOnLaunch: Boolean = true,
-    val playerName: String = "Player",
+    /**
+     * Exactly what the user has typed, which may be blank while they are
+     * mid-edit. Nothing substitutes a default into this value: doing so meant
+     * that clearing the field wrote "Player" straight back and the text
+     * snapped back before a real name could be typed.
+     */
+    val playerName: String = "",
     /** Which builds the updater offers. Production unless deliberately changed. */
     val updateChannel: UpdateChannel = UpdateChannel.PRODUCTION,
 ) {
+    /**
+     * The name other players actually see. This is where the default lives, so
+     * an empty field is a display concern rather than something written back
+     * into what the user is typing.
+     */
+    val displayName: String get() = playerName.trim().ifBlank { DEFAULT_PLAYER_NAME }
+
     /** Scales a nominal duration by the chosen speed. */
     fun scaled(millis: Long): Long =
         (millis / animationSpeed.coerceIn(MIN_SPEED, MAX_SPEED)).toLong()
@@ -36,6 +49,7 @@ data class Settings(
     companion object {
         const val MIN_SPEED = 0.5f
         const val MAX_SPEED = 2.0f
+        const val DEFAULT_PLAYER_NAME = "Player"
     }
 }
 
@@ -54,7 +68,7 @@ class SettingsRepository(private val context: Context) {
             soundEnabled = prefs[Keys.SOUND] ?: true,
             animationSpeed = prefs[Keys.SPEED] ?: 1.0f,
             checkForUpdatesOnLaunch = prefs[Keys.UPDATE_ON_LAUNCH] ?: true,
-            playerName = prefs[Keys.NAME] ?: "Player",
+            playerName = prefs[Keys.NAME] ?: "",
             updateChannel = prefs[Keys.CHANNEL]
                 ?.let { stored -> runCatching { UpdateChannel.valueOf(stored) }.getOrNull() }
                 ?: UpdateChannel.PRODUCTION,
@@ -79,7 +93,8 @@ class SettingsRepository(private val context: Context) {
         context.dataStore.edit { it[Keys.UPDATE_ON_LAUNCH] = enabled }
     }
 
+    /** Stores the name verbatim. The fallback belongs to [Settings.displayName]. */
     suspend fun setPlayerName(name: String) {
-        context.dataStore.edit { it[Keys.NAME] = name.trim().ifBlank { "Player" } }
+        context.dataStore.edit { it[Keys.NAME] = name }
     }
 }

app/src/main/java/org/prolibertate/games/ui/AppRoot.kt

@@ -39,6 +39,7 @@ import org.prolibertate.games.game.engine.TableConfig
 import org.prolibertate.games.net.LobbyController
 import org.prolibertate.games.settings.Settings
 import org.prolibertate.games.settings.SettingsRepository
+import org.prolibertate.games.update.UpdateChannel
 import org.prolibertate.games.update.Updater
 
 /** Everything the screens need, assembled once by the activity. */
@@ -75,11 +76,15 @@ fun AppRoot(env: AppEnv) {
     val settings by env.settingsRepository.settings.collectAsState(initial = Settings())
     var stack by remember { mutableStateOf(listOf<Route>(Route.Menu)) }
 
-    fun push(route: Route) {
-        stack = stack + route
+    // Read from the installed APK's own version name, so this follows the build
+    // rather than the channel the user has selected for future updates.
+    val showComingSoon = remember {
+        env.updater.installedChannel() == UpdateChannel.DEV
     }
 
-    fun pop() {
+    val push: (Route) -> Unit = { route -> stack = stack + route }
+
+    val pop: () -> Unit = {
         if (stack.size > 1) {
             // Leaving a lobby or a table tears the networking down with it.
             when (stack.last()) {
@@ -92,8 +97,40 @@ fun AppRoot(env: AppEnv) {
 
     BackHandler(enabled = stack.size > 1) { pop() }
 
+    var splashDone by remember { mutableStateOf(false) }
+
+    Box(modifier = Modifier.fillMaxSize()) {
+        AppContent(
+            env = env,
+            settings = settings,
+            stack = stack,
+            showComingSoon = showComingSoon,
+            push = push,
+            pop = pop,
+        )
+
+        // Over the top, so the menu behind it is already composed when it fades.
+        if (!splashDone) {
+            SplashScreen(onFinished = { splashDone = true })
+        }
+    }
+}
+
+/** The navigation stack proper, kept separate so the splash can sit over it. */
+@Composable
+private fun AppContent(
+    env: AppEnv,
+    settings: Settings,
+    stack: List<Route>,
+    showComingSoon: Boolean,
+    push: (Route) -> Unit,
+    pop: () -> Unit,
+) {
     when (val route = stack.last()) {
         is Route.Menu -> MainMenuScreen(
+            // Dev builds show the games that are not finished yet; production
+            // releases list only what can actually be played.
+            showComingSoon = showComingSoon,
             onPickGame = { push(Route.Setup(it.id)) },
             onJoinGame = { push(Route.Lobby(gameId = "", optionsJson = "{}", hosting = false)) },
             onSettings = { push(Route.Settings) },
@@ -107,7 +144,7 @@ fun AppRoot(env: AppEnv) {
 
         is Route.Setup -> GameSetupScreen(
             descriptor = GameCatalog.byId(route.gameId)!!,
-            playerName = settings.playerName,
+            playerName = settings.displayName,
             onBack = { pop() },
             onPlayOffline = { config -> push(Route.Play(route.gameId, config, true, 0)) },
             onHostOnline = { optionsJson ->
@@ -118,7 +155,7 @@ fun AppRoot(env: AppEnv) {
         is Route.Lobby -> LobbyScreen(
             env = env,
             route = route,
-            playerName = settings.playerName,
+            playerName = settings.displayName,
             onBack = { pop() },
             onStart = { config, hosting, seat ->
                 push(Route.Play(config.gameId, config, hosting, seat))
@@ -141,6 +178,7 @@ fun AppRoot(env: AppEnv) {
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun MainMenuScreen(
+    showComingSoon: Boolean,
     onPickGame: (GameDescriptor) -> Unit,
     onJoinGame: () -> Unit,
     onSettings: () -> Unit,
@@ -175,6 +213,10 @@ fun MainMenuScreen(
                 modifier = Modifier.fillMaxSize(),
             ) {
                 GameCategory.entries.forEach { category ->
+                    val games = GameCatalog.byCategory(category, includeComingSoon = showComingSoon)
+                    // Don't leave a heading stranded over nothing.
+                    if (games.isEmpty()) return@forEach
+
                     item(span = { androidx.compose.foundation.lazy.grid.GridItemSpan(maxLineSpan) }) {
                         Text(
                             text = category.label,
@@ -183,7 +225,7 @@ fun MainMenuScreen(
                             modifier = Modifier.padding(top = 12.dp, bottom = 4.dp),
                         )
                     }
-                    items(GameCatalog.byCategory(category)) { game ->
+                    items(games) { game ->
                         GameTile(game = game, onClick = { onPickGame(game) })
                     }
                 }

app/src/main/java/org/prolibertate/games/ui/PlayScreen.kt

@@ -19,6 +19,7 @@ import org.prolibertate.games.game.sequence.SequenceState
 import org.prolibertate.games.net.MatchController
 import org.prolibertate.games.settings.Settings
 import org.prolibertate.games.ui.game.EuchreScreen
+import org.prolibertate.games.ui.game.TRICK_HOLD_MILLIS
 import org.prolibertate.games.ui.game.SequenceScreen
 
 /**
@@ -58,10 +59,24 @@ fun PlayScreen(
                         }
                     },
                     aiThinkingMillis = { settings.scaled(700L) },
+                    // Keep the finished trick on the table before the next
+                    // card lands on top of it.
+                    holdBeforeNextMove = { state ->
+                        if (state.completedTrick.isNotEmpty()) {
+                            settings.scaled(TRICK_HOLD_MILLIS)
+                        } else {
+                            0L
+                        }
+                    },
                 )
             }
             StartMatch(env, controller, route)
-            EuchreScreen(controller = controller, localSeat = route.localSeat, onExit = onExit)
+            EuchreScreen(
+                controller = controller,
+                localSeat = route.localSeat,
+                trickHoldMillis = settings.scaled(TRICK_HOLD_MILLIS),
+                onExit = onExit,
+            )
         }
 
         GameCatalog.SEQUENCE -> {

app/src/main/java/org/prolibertate/games/ui/SettingsScreen.kt

@@ -36,7 +36,11 @@ fun SettingsScreen(
     onBack: () -> Unit,
 ) {
     val scope = rememberCoroutineScope()
-    var name by remember(settings.playerName) { mutableStateOf(settings.playerName) }
+    // Null until the user touches the field, at which point their text takes
+    // over for good. Keying this off the stored name instead meant every
+    // keystroke re-seeded the field from what had just been written, so the
+    // caret jumped and a cleared field refilled itself.
+    var editedName by remember { mutableStateOf<String?>(null) }
     var updateStatus by remember { mutableStateOf<String?>(null) }
     var pendingRelease by remember { mutableStateOf<Updater.Release?>(null) }
 
@@ -86,14 +90,22 @@ fun SettingsScreen(
                     style = MaterialTheme.typography.bodySmall,
                 )
                 OutlinedTextField(
-                    value = name,
+                    value = editedName ?: settings.playerName,
                     onValueChange = { entered ->
-                        name = entered
+                        editedName = entered
                         scope.launch { env.settingsRepository.setPlayerName(entered) }
                     },
+                    placeholder = { Text(Settings.DEFAULT_PLAYER_NAME) },
                     singleLine = true,
                     modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
                 )
+                if ((editedName ?: settings.playerName).isBlank()) {
+                    Text(
+                        text = "Leave it empty and you'll show up as " +
+                            "${Settings.DEFAULT_PLAYER_NAME}.",
+                        style = MaterialTheme.typography.bodySmall,
+                    )
+                }
             }
 
             Divider()

app/src/main/java/org/prolibertate/games/ui/SplashScreen.kt

@@ -0,0 +1,131 @@
+package org.prolibertate.games.ui
+
+import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Shadow
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.Font
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import kotlinx.coroutines.delay
+import org.prolibertate.games.R
+import org.prolibertate.games.ui.theme.TartanBackground
+
+/** How long the splash holds at full opacity before fading. */
+private const val SPLASH_HOLD_MILLIS = 2_000L
+
+private const val SPLASH_FADE_MILLIS = 600
+
+/**
+ * Uncial Antiqua — a Celtic uncial face, bundled under the SIL Open Font
+ * License. See docs/licenses/UncialAntiqua-OFL.txt.
+ */
+val CelticFontFamily = FontFamily(Font(R.font.uncial_antiqua))
+
+/**
+ * The launch screen: Wallace tartan under the name of the house.
+ *
+ * Drawn as an overlay rather than a separate destination, so the menu is
+ * already composed and ready behind it and the fade reveals a live screen
+ * instead of a blank one.
+ */
+@Composable
+fun SplashScreen(
+    onFinished: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    var fading by remember { mutableStateOf(false) }
+    val alpha by animateFloatAsState(
+        targetValue = if (fading) 0f else 1f,
+        animationSpec = tween(durationMillis = SPLASH_FADE_MILLIS),
+        label = "splashFade",
+    )
+
+    LaunchedEffect(Unit) {
+        delay(SPLASH_HOLD_MILLIS)
+        fading = true
+        delay(SPLASH_FADE_MILLIS.toLong())
+        onFinished()
+    }
+
+    BoxWithConstraints(modifier = modifier.fillMaxSize().alpha(alpha)) {
+        // Read the constraints here and hold them in locals: inside Column the
+        // implicit receiver becomes ColumnScope, and maxWidth/maxHeight are no
+        // longer in scope.
+        val shortestSide = minOf(maxWidth, maxHeight).value
+
+        // Weave scale follows the screen so the cloth reads the same on a phone
+        // and a tablet rather than turning into a fine grid on a large display.
+        val threadWidth = (shortestSide * 0.012f).dp
+        val titleSize = (shortestSide * 0.13f).sp
+        TartanBackground(
+            modifier = Modifier.fillMaxSize(),
+            threadWidth = threadWidth,
+        )
+
+        // A scrim keeps the lettering legible over the busiest part of the sett.
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .background(Color.Black.copy(alpha = 0.45f))
+        )
+
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(horizontal = 24.dp),
+            verticalArrangement = Arrangement.Center,
+            horizontalAlignment = Alignment.CenterHorizontally,
+        ) {
+            Text(
+                text = "Pro Libertate",
+                style = TextStyle(
+                    fontFamily = CelticFontFamily,
+                    fontSize = titleSize,
+                    color = Color(0xFFF7EFD8),
+                    textAlign = TextAlign.Center,
+                    shadow = Shadow(
+                        color = Color.Black,
+                        offset = Offset(0f, 3f),
+                        blurRadius = 10f,
+                    ),
+                ),
+            )
+            Text(
+                text = "Games",
+                style = TextStyle(
+                    fontFamily = CelticFontFamily,
+                    fontSize = titleSize,
+                    color = Color(0xFFF2C200),
+                    textAlign = TextAlign.Center,
+                    shadow = Shadow(
+                        color = Color.Black,
+                        offset = Offset(0f, 3f),
+                        blurRadius = 10f,
+                    ),
+                ),
+            )
+        }
+    }
+}

app/src/main/java/org/prolibertate/games/ui/common/Components.kt

@@ -41,6 +41,12 @@ fun PlayingCardView(
     width: Dp = 64.dp,
     selected: Boolean = false,
     enabled: Boolean = true,
+    /**
+     * Short note printed on the face, for when the rank and suit alone do not
+     * say what the card does — a Sequence jack being the obvious case, since
+     * one-eyed and two-eyed jacks are only distinguishable by their artwork.
+     */
+    caption: String? = null,
     onClick: (() -> Unit)? = null,
 ) {
     val ink = if (card.suit.isRed) CardRed else CardBlack
@@ -61,6 +67,8 @@ fun PlayingCardView(
             ),
         contentAlignment = Alignment.Center,
     ) {
+        // Shrink the pips slightly when a caption has to share the face.
+        val pipScale = if (caption == null) 0.34f else 0.28f
         Column(
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.Center,
@@ -69,13 +77,22 @@ fun PlayingCardView(
                 text = card.rank.short,
                 color = ink,
                 fontWeight = FontWeight.Bold,
-                fontSize = (width.value * 0.34f).sp,
+                fontSize = (width.value * pipScale).sp,
             )
             Text(
                 text = card.suit.symbol,
                 color = ink,
-                fontSize = (width.value * 0.34f).sp,
+                fontSize = (width.value * pipScale).sp,
             )
+            if (caption != null) {
+                Text(
+                    text = caption,
+                    color = ink,
+                    fontWeight = FontWeight.Bold,
+                    fontSize = (width.value * 0.145f).sp,
+                    maxLines = 1,
+                )
+            }
         }
     }
 }

app/src/main/java/org/prolibertate/games/ui/game/EuchreScreen.kt

@@ -1,13 +1,18 @@
 package org.prolibertate.games.ui.game
 
+import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.tween
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.rememberScrollState
@@ -18,13 +23,22 @@ import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.delay
+import kotlin.math.roundToInt
 import org.prolibertate.games.game.euchre.CallTrump
 import org.prolibertate.games.game.euchre.Discard
 import org.prolibertate.games.game.euchre.EuchreMove
@@ -51,6 +65,7 @@ import org.prolibertate.games.ui.theme.FeltGreenDark
 fun EuchreScreen(
     controller: MatchController<EuchreState, EuchreMove>,
     localSeat: Int,
+    trickHoldMillis: Long,
     onExit: () -> Unit,
 ) {
     val state by controller.state.collectAsState()
@@ -84,7 +99,7 @@ fun EuchreScreen(
                         .background(FeltGreenDark),
                     contentAlignment = Alignment.Center,
                 ) {
-                    TrickArea(current, localSeat, cardWidth)
+                    TrickArea(current, localSeat, cardWidth, trickHoldMillis)
                 }
 
                 notice?.let {
@@ -166,8 +181,47 @@ private fun seatLabel(relative: Int): String = when (relative) {
  * turned to face them, so you can read a trick at a glance instead of matching
  * seat numbers to cards.
  */
+/** How long a completed trick rests on the table before being swept away. */
+const val TRICK_HOLD_MILLIS = 1_000L
+
+/** Duration of the sweep itself. */
+private const val TRICK_SWEEP_MILLIS = 450
+
 @Composable
-private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
+private fun TrickArea(
+    state: EuchreState,
+    localSeat: Int,
+    cardWidth: Dp,
+    trickHoldMillis: Long,
+) {
+    // A finished trick stays put for a beat so it can be read, then slides off
+    // towards whoever won it.
+    val sweeping = state.trick.isEmpty() && state.completedTrick.isNotEmpty()
+    val cardsOnTable = if (sweeping) state.completedTrick else state.trick
+
+    var sweepStarted by remember(state.completedTrick) { mutableStateOf(false) }
+    LaunchedEffect(state.completedTrick) {
+        if (state.completedTrick.isNotEmpty()) {
+            delay(trickHoldMillis)
+            sweepStarted = true
+        }
+    }
+    val sweep by animateFloatAsState(
+        targetValue = if (sweeping && sweepStarted) 1f else 0f,
+        animationSpec = tween(durationMillis = TRICK_SWEEP_MILLIS),
+        label = "trickSweep",
+    )
+
+    // Everything travels towards the winner's edge of the table together.
+    val winnerRelative = state.lastTrickWinner?.let { relativePosition(it, localSeat) } ?: 0
+    val (dirX, dirY) = when (winnerRelative) {
+        0 -> 0f to 1f
+        1 -> -1f to 0f
+        2 -> 0f to -1f
+        else -> 1f to 0f
+    }
+    val travelPx = with(LocalDensity.current) { (cardWidth * 2.5f).toPx() }
+
     Box(modifier = Modifier.fillMaxSize().padding(4.dp)) {
 
         // The turn card sits in the middle of the table during bidding.
@@ -185,7 +239,9 @@ private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
             }
         }
 
-        if (state.upCard == null && state.trick.isEmpty() && state.phase == EuchrePhase.PLAYING) {
+        if (state.upCard == null && cardsOnTable.isEmpty() &&
+            state.phase == EuchrePhase.PLAYING
+        ) {
             Text(
                 text = if (state.turn == localSeat) "Lead a card" else "Waiting…",
                 color = MaterialTheme.colorScheme.onPrimary,
@@ -193,7 +249,7 @@ private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
             )
         }
 
-        state.trick.forEach { played ->
+        cardsOnTable.forEach { played ->
             val relative = relativePosition(played.seat, localSeat)
             val alignment = when (relative) {
                 0 -> Alignment.BottomCenter
@@ -211,7 +267,15 @@ private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
             }
 
             Column(
-                modifier = Modifier.align(alignment),
+                modifier = Modifier
+                    .align(alignment)
+                    .offset {
+                        IntOffset(
+                            x = (dirX * travelPx * sweep).roundToInt(),
+                            y = (dirY * travelPx * sweep).roundToInt(),
+                        )
+                    }
+                    .alpha(1f - sweep),
                 horizontalAlignment = Alignment.CenterHorizontally,
             ) {
                 PlayingCardView(
@@ -227,6 +291,16 @@ private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
             }
         }
 
+        // Name the winner while their cards are still on the table.
+        if (sweeping && state.lastTrickWinner != null) {
+            Text(
+                text = "${seatLabel(winnerRelative)} takes it",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.onPrimary,
+                modifier = Modifier.align(Alignment.Center).alpha(1f - sweep),
+            )
+        }
+
         // Who is on the clock, shown where they sit rather than as a seat number.
         if (state.phase == EuchrePhase.PLAYING && state.trick.size < state.activeSeatCount) {
             val waitingOn = relativePosition(state.turn, localSeat)
@@ -242,6 +316,7 @@ private fun TrickArea(state: EuchreState, localSeat: Int, cardWidth: Dp) {
     }
 }
 
+@OptIn(ExperimentalLayoutApi::class)
 @Composable
 private fun BiddingControls(
     state: EuchreState,
@@ -260,6 +335,8 @@ private fun BiddingControls(
     // the turn card to somebody else or to yourself.
     val youAreDealer = state.turn == state.dealer
     val upCard = state.upCard
+    val canPass = Pass in legal
+    val choices = legal.filter { it != Pass }
 
     Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
         Text(
@@ -282,13 +359,25 @@ private fun BiddingControls(
                 style = MaterialTheme.typography.bodySmall,
             )
         }
-        Row(
-            modifier = Modifier.horizontalScroll(rememberScrollState()),
+        // Stick the dealer is the one case where there is genuinely no way out,
+        // so say so rather than leaving it looking like a missing button.
+        if (!canPass) {
+            Text(
+                text = "Everyone has passed, so as dealer you must name a suit — " +
+                    "that's stick the dealer. Turn it off in game setup if you'd " +
+                    "rather the hand be thrown in.",
+                style = MaterialTheme.typography.bodySmall,
+            )
+        }
+
+        // Wraps rather than scrolls. A scrolling row pushed Pass off the right
+        // edge of a phone screen, which made bidding look compulsory.
+        FlowRow(
             horizontalArrangement = Arrangement.spacedBy(6.dp),
+            verticalArrangement = Arrangement.spacedBy(6.dp),
         ) {
-            legal.forEach { move ->
+            choices.forEach { move ->
                 val label = when (move) {
-                    is Pass -> "Pass"
                     is OrderUp -> when {
                         youAreDealer && move.alone -> "Pick it up, alone"
                         youAreDealer -> "Pick it up"
@@ -301,13 +390,21 @@ private fun BiddingControls(
 
                     is Discard -> "Discard ${move.card.label}"
                     is PlayCard -> move.card.label
+                    is Pass -> "Pass"
                 }
-                if (move is Pass) {
-                    OutlinedButton(onClick = { onMove(move) }) { Text(label) }
-                } else {
                 Button(onClick = { onMove(move) }) { Text(label) }
             }
         }
+
+        // Kept out of the wrapping group and full width so it can never be
+        // clipped, scrolled away or mistaken for one of the bids.
+        if (canPass) {
+            OutlinedButton(
+                onClick = { onMove(Pass) },
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text("Pass")
+            }
         }
     }
 }

app/src/main/java/org/prolibertate/games/ui/game/SequenceScreen.kt

@@ -35,6 +35,8 @@ import androidx.compose.ui.unit.sp
 import org.prolibertate.games.game.cards.Card
 import org.prolibertate.games.game.sequence.BOARD_SIZE
 import org.prolibertate.games.game.sequence.ExchangeDeadCard
+import org.prolibertate.games.game.sequence.isOneEyedJack
+import org.prolibertate.games.game.sequence.isTwoEyedJack
 import org.prolibertate.games.game.sequence.NO_TEAM
 import org.prolibertate.games.game.sequence.PlaceChip
 import org.prolibertate.games.game.sequence.RemoveChip
@@ -54,6 +56,17 @@ import org.prolibertate.games.ui.theme.TeamColours
  */
 private val HighlightAmber = Color(0xFFFFC107)
 
+/**
+ * What a jack does, printed on its face. On a real deck this is carried by the
+ * artwork — a jack shown in profile has one eye and removes a chip, one shown
+ * face-on has two and is wild — which a rank-and-suit card cannot convey.
+ */
+private fun jackCaption(card: Card): String? = when {
+    isTwoEyedJack(card) -> "WILD"
+    isOneEyedJack(card) -> "REMOVE"
+    else -> null
+}
+
 /**
  * The Sequence board.
  *
@@ -294,6 +307,9 @@ private fun HandStrip(
                     width = cardWidth,
                     selected = card == selected,
                     enabled = card in playable,
+                    // A jack's power comes from its artwork, which these cards
+                    // do not have, so spell it out on the face instead.
+                    caption = jackCaption(card),
                     onClick = {
                         val dead = exchanges[card]
                         if (dead != null) onExchange(dead) else onSelect(card)
@@ -301,9 +317,18 @@ private fun HandStrip(
                 )
             }
         }
-        selected?.let {
+        selected?.let { card ->
             Text(
-                text = "Tap a highlighted square to play ${it.label}.",
+                text = when {
+                    isTwoEyedJack(card) ->
+                        "${card.label} is wild — tap any empty square."
+
+                    isOneEyedJack(card) ->
+                        "${card.label} removes a chip — tap an opponent's, " +
+                            "as long as it isn't part of a finished sequence."
+
+                    else -> "Tap a highlighted square to play ${card.label}."
+                },
                 style = MaterialTheme.typography.bodySmall,
             )
         }

app/src/main/java/org/prolibertate/games/ui/theme/Tartan.kt

@@ -0,0 +1,97 @@
+package org.prolibertate.games.ui.theme
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+
+/** One band of a tartan sett, measured in threads. */
+data class TartanStripe(val color: Color, val threads: Int)
+
+val WallaceRed = Color(0xFFB3121B)
+val WallaceBlack = Color(0xFF111111)
+val WallaceGold = Color(0xFFF2C200)
+
+/**
+ * The Wallace sett.
+ *
+ * NOTE: this is an approximation, not a certified threadcount. It reproduces
+ * what the Wallace tartan reads as — a bold red and black check divided by a
+ * narrow gold overstripe — but the exact thread counts held by the Scottish
+ * Register of Tartans could not be verified from here, so the numbers below
+ * are chosen to look right rather than to be authoritative. They are plain
+ * data: replacing them with the registered counts changes the whole app's
+ * branding and needs no other edit.
+ */
+val WallaceSett: List<TartanStripe> = listOf(
+    TartanStripe(WallaceRed, 40),
+    TartanStripe(WallaceBlack, 40),
+    TartanStripe(WallaceGold, 4),
+)
+
+/**
+ * Draws a tartan by laying the sett down vertically as warp, then across as
+ * weft at half opacity. The overlap is what produces the blended squares and
+ * the sense of a woven cloth rather than a printed grid — red warp under black
+ * weft comes out a darker red, exactly as it does on the loom.
+ */
+fun DrawScope.drawTartan(
+    sett: List<TartanStripe> = WallaceSett,
+    threadSize: Float,
+) {
+    if (sett.isEmpty() || threadSize <= 0f) return
+    val repeat = sett.sumOf { it.threads } * threadSize
+    if (repeat <= 0f) return
+
+    // Warp: full-height bands.
+    var x = 0f
+    while (x < size.width) {
+        var offset = x
+        for (stripe in sett) {
+            val width = stripe.threads * threadSize
+            drawRect(
+                color = stripe.color,
+                topLeft = Offset(offset, 0f),
+                size = Size(width, size.height),
+            )
+            offset += width
+        }
+        x += repeat
+    }
+
+    // Weft: full-width bands, half opacity so the warp shows through.
+    var y = 0f
+    while (y < size.height) {
+        var offset = y
+        for (stripe in sett) {
+            val height = stripe.threads * threadSize
+            drawRect(
+                color = stripe.color.copy(alpha = 0.5f),
+                topLeft = Offset(0f, offset),
+                size = Size(size.width, height),
+            )
+            offset += height
+        }
+        y += repeat
+    }
+}
+
+/**
+ * A tartan fill. [threadWidth] sets the weave scale, so the same cloth can be
+ * a fine weave on a phone and a coarse one on a tablet without redrawing it.
+ */
+@Composable
+fun TartanBackground(
+    modifier: Modifier = Modifier,
+    sett: List<TartanStripe> = WallaceSett,
+    threadWidth: Dp = 2.dp,
+) {
+    Canvas(modifier = modifier) {
+        drawTartan(sett = sett, threadSize = threadWidth.toPx())
+    }
+}

app/src/main/res/drawable/ic_launcher_background.xml

@@ -1,11 +1,59 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  A single square of the Wallace tartan.
+
+  The sett is laid down as warp (opaque, vertical) over a black ground, then as
+  weft (half opacity, horizontal), which is what produces the blended squares
+  rather than a flat grid. One full repeat is 72 units wide, so the centre
+  72x72 safe zone of the adaptive icon shows exactly one repeat.
+
+  Thread proportions match WallaceSett in Tartan.kt — see the note there about
+  these being a visual approximation rather than the registered threadcount.
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
-    <!-- Solid grass-green field. -->
+
+    <!-- Ground -->
     <path
-        android:fillColor="#2E7D32"
+        android:fillColor="#111111"
         android:pathData="M0,0h108v108h-108z" />
+
+    <!-- Warp: red -->
+    <path
+        android:fillColor="#B3121B"
+        android:pathData="M0,0h34.29v108h-34.29z" />
+    <path
+        android:fillColor="#B3121B"
+        android:pathData="M72,0h34.29v108h-34.29z" />
+    <!-- Warp: gold overstripe -->
+    <path
+        android:fillColor="#F2C200"
+        android:pathData="M68.57,0h3.43v108h-3.43z" />
+
+    <!-- Weft: red -->
+    <path
+        android:fillColor="#B3121B"
+        android:fillAlpha="0.5"
+        android:pathData="M0,0h108v34.29h-108z" />
+    <path
+        android:fillColor="#B3121B"
+        android:fillAlpha="0.5"
+        android:pathData="M0,72h108v34.29h-108z" />
+    <!-- Weft: black -->
+    <path
+        android:fillColor="#111111"
+        android:fillAlpha="0.5"
+        android:pathData="M0,34.29h108v34.28h-108z" />
+    <path
+        android:fillColor="#111111"
+        android:fillAlpha="0.5"
+        android:pathData="M0,106.29h108v1.71h-108z" />
+    <!-- Weft: gold overstripe -->
+    <path
+        android:fillColor="#F2C200"
+        android:fillAlpha="0.5"
+        android:pathData="M0,68.57h108v3.43h-108z" />
 </vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -1,14 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  Deliberately empty. The icon is the cloth itself, so the adaptive icon's
+  foreground layer carries nothing — anything drawn here would sit on top of the
+  tartan and break the "single square of tartan" idea.
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
-    <!-- A black hole in the center of the icon's safe zone. -->
     <path
-        android:fillColor="#111111"
-        android:pathData="M54,54m-26,0a26,26 0,1 1,52 0a26,26 0,1 1,-52 0" />
-    <path
-        android:fillColor="#000000"
-        android:pathData="M54,54m-20,0a20,20 0,1 1,40 0a20,20 0,1 1,-40 0" />
+        android:fillColor="#00000000"
+        android:pathData="M0,0h108v108h-108z" />
 </vector>

app/src/main/res/mipmap/ic_launcher.xml

@@ -1,17 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Fallback launcher icon for API < 26 (no adaptive-icon support). -->
+<!-- Fallback launcher icon for API < 26, which has no adaptive-icon support.
+     Same Wallace tartan swatch as drawable/ic_launcher_background.xml, drawn
+     at icon scale so one full sett repeat fills the tile. -->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="48dp"
     android:height="48dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#2E7D32"
-        android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#111111"
-        android:pathData="M54,54m-26,0a26,26 0,1 1,52 0a26,26 0,1 1,-52 0" />
-    <path
-        android:fillColor="#000000"
-        android:pathData="M54,54m-20,0a20,20 0,1 1,40 0a20,20 0,1 1,-40 0" />
+    android:viewportWidth="84"
+    android:viewportHeight="84">
+
+    <path android:fillColor="#111111" android:pathData="M0,0h84v84h-84z" />
+
+    <!-- Warp -->
+    <path android:fillColor="#B3121B" android:pathData="M0,0h40v84h-40z" />
+    <path android:fillColor="#F2C200" android:pathData="M80,0h4v84h-4z" />
+
+    <!-- Weft -->
+    <path android:fillColor="#B3121B" android:fillAlpha="0.5" android:pathData="M0,0h84v40h-84z" />
+    <path android:fillColor="#111111" android:fillAlpha="0.5" android:pathData="M0,40h84v40h-84z" />
+    <path android:fillColor="#F2C200" android:fillAlpha="0.5" android:pathData="M0,80h84v4h-84z" />
 </vector>

app/src/main/res/mipmap/ic_launcher_round.xml

@@ -1,17 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Fallback round launcher icon for API < 26. -->
+<!-- Fallback launcher icon for API < 26, which has no adaptive-icon support.
+     Same Wallace tartan swatch as drawable/ic_launcher_background.xml, drawn
+     at icon scale so one full sett repeat fills the tile. -->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="48dp"
     android:height="48dp"
-    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#2E7D32"
-        android:pathData="M54,54m-54,0a54,54 0,1 1,108 0a54,54 0,1 1,-108 0" />
-    <path
-        android:fillColor="#111111"
-        android:pathData="M54,54m-26,0a26,26 0,1 1,52 0a26,26 0,1 1,-52 0" />
-    <path
-        android:fillColor="#000000"
-        android:pathData="M54,54m-20,0a20,20 0,1 1,40 0a20,20 0,1 1,-40 0" />
+    android:viewportWidth="84"
+    android:viewportHeight="84">
+
+    <path android:fillColor="#111111" android:pathData="M0,0h84v84h-84z" />
+
+    <!-- Warp -->
+    <path android:fillColor="#B3121B" android:pathData="M0,0h40v84h-40z" />
+    <path android:fillColor="#F2C200" android:pathData="M80,0h4v84h-4z" />
+
+    <!-- Weft -->
+    <path android:fillColor="#B3121B" android:fillAlpha="0.5" android:pathData="M0,0h84v40h-84z" />
+    <path android:fillColor="#111111" android:fillAlpha="0.5" android:pathData="M0,40h84v40h-84z" />
+    <path android:fillColor="#F2C200" android:fillAlpha="0.5" android:pathData="M0,80h84v4h-84z" />
 </vector>

app/src/main/res/values/colors.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="ic_launcher_background">#1B5E20</color>
+    <color name="ic_launcher_background">#B3121B</color>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <!-- Shown for the instant before Compose draws, so launch does not flash
+         white before the tartan splash appears. -->
+    <color name="splash_background">#4A0B10</color>
 </resources>

app/src/main/res/values/themes.xml

@@ -5,5 +5,6 @@
     <style name="Theme.ProLibertateGames" parent="android:Theme.Material.NoActionBar">
         <item name="android:windowNoTitle">true</item>
         <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowBackground">@color/splash_background</item>
     </style>
 </resources>

app/src/test/java/org/prolibertate/games/game/CatalogTest.kt

@@ -0,0 +1,65 @@
+package org.prolibertate.games.game
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class CatalogTest {
+
+    @Test
+    fun `every game has a unique id`() {
+        val ids = GameCatalog.all.map { it.id }
+        assertEquals("ids must be unique", ids.size, ids.distinct().size)
+        ids.forEach { assertEquals(it, GameCatalog.byId(it)?.id) }
+    }
+
+    @Test
+    fun `a production build lists only games that can be played`() {
+        GameCategory.entries.forEach { category ->
+            val shown = GameCatalog.byCategory(category, includeComingSoon = false)
+            assertTrue(
+                "$category offers an unfinished game in a release build",
+                shown.all { it.available },
+            )
+        }
+    }
+
+    @Test
+    fun `a dev build lists everything including what is still coming`() {
+        val shown = GameCategory.entries.flatMap {
+            GameCatalog.byCategory(it, includeComingSoon = true)
+        }
+        assertEquals(GameCatalog.all.size, shown.size)
+        assertTrue("unfinished games are visible while developing", shown.any { !it.available })
+    }
+
+    @Test
+    fun `hiding unfinished games still leaves something to play in each category`() {
+        // A category filtered down to nothing would leave a stranded heading,
+        // and a menu with no playable game at all would be a broken release.
+        GameCategory.entries.forEach { category ->
+            assertFalse(
+                "$category has nothing playable in a release build",
+                GameCatalog.byCategory(category, includeComingSoon = false).isEmpty(),
+            )
+        }
+        assertTrue(GameCatalog.playable.isNotEmpty())
+    }
+
+    @Test
+    fun `playable games are the ones with engines wired up`() {
+        assertEquals(
+            setOf(GameCatalog.EUCHRE, GameCatalog.SEQUENCE),
+            GameCatalog.playable.map { it.id }.toSet(),
+        )
+    }
+
+    @Test
+    fun `player counts are sane`() {
+        GameCatalog.all.forEach { game ->
+            assertTrue("${game.id} min players", game.minPlayers >= 2)
+            assertTrue("${game.id} max >= min", game.maxPlayers >= game.minPlayers)
+        }
+    }
+}

app/src/test/java/org/prolibertate/games/game/euchre/EuchreBiddingRateTest.kt

@@ -0,0 +1,121 @@
+package org.prolibertate.games.game.euchre
+
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.prolibertate.games.game.engine.PlayerKind
+import org.prolibertate.games.game.engine.PlayerSlot
+import org.prolibertate.games.game.engine.TableConfig
+
+/**
+ * How often the AI takes the bid.
+ *
+ * This exists because an over-eager AI does not look like a tuning problem from
+ * the table — it looks like the game refusing to let you bid. If the three
+ * computer players order up nearly every deal, a human dealer is dragged into
+ * picking up the turn card again and again and never gets a say.
+ */
+class EuchreBiddingRateTest {
+
+    private val json = Json { encodeDefaults = true }
+
+    private fun config(seed: Long, options: EuchreOptions = EuchreOptions()) = TableConfig(
+        gameId = "euchre",
+        seats = (0 until 4).map {
+            PlayerSlot(seat = it, name = "P$it", kind = PlayerKind.AI, team = it % 2)
+        },
+        optionsJson = json.encodeToString(options),
+        seed = seed,
+    )
+
+    private data class Outcome(
+        val orderedUpInRoundOne: Boolean,
+        val reachedRoundTwo: Boolean,
+        val dealerForcedToPickUp: Boolean,
+    )
+
+    /** Runs the bidding for one deal with every seat played by the AI. */
+    private fun bidOutDeal(seed: Long): Outcome {
+        val ai = EuchreAi()
+        var state = EuchreRules.initialState(config(seed))
+        val dealer = state.dealer
+        var reachedRoundTwo = false
+        var guard = 0
+
+        while (guard++ < 40) {
+            when (state.phase) {
+                EuchrePhase.BID_ROUND_1 -> Unit
+                EuchrePhase.BID_ROUND_2 -> reachedRoundTwo = true
+                else -> break
+            }
+            val seat = EuchreRules.currentSeat(state) ?: break
+            val legal = EuchreRules.legalMoves(state, seat)
+            state = EuchreRules.applyMove(state, seat, ai.chooseMove(state, seat, legal))
+        }
+
+        // Reaching the discard step means somebody ordered it up and the dealer
+        // now has to take the card whether they like it or not.
+        val orderedUpInRoundOne = !reachedRoundTwo && state.trump != null
+        return Outcome(
+            orderedUpInRoundOne = orderedUpInRoundOne,
+            reachedRoundTwo = reachedRoundTwo,
+            dealerForcedToPickUp = orderedUpInRoundOne && state.maker != dealer,
+        )
+    }
+
+    @Test
+    fun `the ai does not order up on most deals`() {
+        val deals = 2000
+        val outcomes = (0 until deals).map { bidOutDeal(it.toLong()) }
+
+        val orderedUp = outcomes.count { it.orderedUpInRoundOne }
+        val forcedPickUp = outcomes.count { it.dealerForcedToPickUp }
+        val roundTwo = outcomes.count { it.reachedRoundTwo }
+
+        val orderedUpRate = orderedUp * 100.0 / deals
+        val forcedRate = forcedPickUp * 100.0 / deals
+        println(
+            "ordered up in round 1: %.1f%%   dealer forced to pick up: %.1f%%   reached round 2: %.1f%%"
+                .format(orderedUpRate, forcedRate, roundTwo * 100.0 / deals)
+        )
+
+        // Ordering up should be a decision, not a formality. Real play turns the
+        // card down more often than not, so a majority of deals must survive
+        // round one.
+        assertTrue(
+            "AI orders up on %.1f%% of deals — far too eager".format(orderedUpRate),
+            orderedUpRate <= 55.0,
+        )
+        assertTrue(
+            "AI almost never bids (%.1f%%) — too timid".format(orderedUpRate),
+            orderedUpRate >= 15.0,
+        )
+        // The specific complaint: as dealer you keep being handed the turn card.
+        assertTrue(
+            "dealer is dragged into picking up on %.1f%% of deals".format(forcedRate),
+            forcedRate <= 45.0,
+        )
+    }
+
+    @Test
+    fun `going alone stays rare`() {
+        val ai = EuchreAi()
+        var alone = 0
+        val deals = 1000
+        repeat(deals) { seed ->
+            var state = EuchreRules.initialState(config(seed.toLong()))
+            var guard = 0
+            while (state.trump == null && guard++ < 40) {
+                val seat = EuchreRules.currentSeat(state) ?: break
+                val legal = EuchreRules.legalMoves(state, seat)
+                if (legal.isEmpty()) break
+                state = EuchreRules.applyMove(state, seat, ai.chooseMove(state, seat, legal))
+            }
+            if (state.aloneSeat != null) alone++
+        }
+        val rate = alone * 100.0 / deals
+        println("went alone: %.1f%%".format(rate))
+        assertTrue("going alone on %.1f%% of deals is too often".format(rate), rate <= 12.0)
+    }
+}

app/src/test/java/org/prolibertate/games/game/euchre/EuchreRulesTest.kt

@@ -304,6 +304,45 @@ class EuchreRulesTest {
         assertEquals(0, finished.scores[0])
     }
 
+    // -- Completed tricks ---------------------------------------------------
+
+    @Test
+    fun `a finished trick stays on the table until the next card is played`() {
+        val trump = Suit.SPADES
+        val hands = listOf(
+            listOf(Card(Rank.ACE, Suit.SPADES), Card(Rank.NINE, Suit.HEARTS)),
+            listOf(Card(Rank.NINE, Suit.SPADES), Card(Rank.TEN, Suit.HEARTS)),
+            listOf(Card(Rank.TEN, Suit.SPADES), Card(Rank.QUEEN, Suit.HEARTS)),
+            listOf(Card(Rank.QUEEN, Suit.SPADES), Card(Rank.KING, Suit.HEARTS)),
+        )
+        var state = playingState(hands = hands, trump = trump)
+
+        // Play a full trick.
+        repeat(4) {
+            val seat = EuchreRules.currentSeat(state)!!
+            state = EuchreRules.applyMove(state, seat, PlayCard(state.hands[seat].first()))
+        }
+
+        assertTrue("the live trick is cleared", state.trick.isEmpty())
+        assertEquals("all four cards are held for display", 4, state.completedTrick.size)
+        assertEquals("seat 0 played the ace of trump", 0, state.lastTrickWinner)
+
+        // The next card played sweeps it away.
+        val next = EuchreRules.currentSeat(state)!!
+        state = EuchreRules.applyMove(state, next, PlayCard(state.hands[next].first()))
+        assertTrue("held trick is cleared once play resumes", state.completedTrick.isEmpty())
+    }
+
+    @Test
+    fun `a fresh hand starts with nothing held on the table`() {
+        var state = EuchreRules.initialState(config())
+        assertTrue(state.completedTrick.isEmpty())
+        state = EuchreRules.applyMove(state, state.turn, OrderUp(alone = false))
+        val discard = EuchreRules.legalMoves(state, state.dealer).first() as Discard
+        state = EuchreRules.applyMove(state, state.dealer, discard)
+        assertTrue("play begins with a clear table", state.completedTrick.isEmpty())
+    }
+
     // -- Full games ---------------------------------------------------------
 
     @Test

docs/RULES-sequence.md

@@ -53,6 +53,11 @@ Play one card and place a chip on a matching empty square, then draw.
 - **Two-eyed jacks** (♦ and ♣) are wild: place a chip on any empty square.
 - **One-eyed jacks** (♥ and ♠) remove one opposing chip — but never a chip that
   is part of a completed sequence, and never your own team's chip.
+
+On a physical deck the difference is carried by the artwork: a jack drawn in
+profile shows one eye, a jack drawn face-on shows two. These cards are drawn as
+rank and suit only, so a jack in hand is captioned **WILD** or **REMOVE**
+instead.
 - **Dead card — *toggle*, on by default.** If both squares printed with your card
   are already occupied, you may discard it and draw a replacement. This does not
   cost your turn, and you may do it once per turn.

docs/licenses/UncialAntiqua-OFL.txt

@@ -0,0 +1,93 @@
+Copyright (c) 2011 by Brian J. Bonislawsky DBA Astigmatic (AOETI) ([email protected]), with Reserved Font Name "Uncial Antiqua"
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.