app/src/main/java/com/runicgateway/app/data/api/PublicApi.kt

@@ -3,6 +3,9 @@
  */
 package com.runicgateway.app.data.api
 
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasCreaturePageDto
+import com.runicgateway.app.data.api.dto.AtlasMetaDto
 import com.runicgateway.app.data.api.dto.ChampDto
 import com.runicgateway.app.data.api.dto.ContactRequest
 import com.runicgateway.app.data.api.dto.ContactResponse
@@ -12,10 +15,15 @@ import com.runicgateway.app.data.api.dto.GovernorDto
 import com.runicgateway.app.data.api.dto.GovernorTermDto
 import com.runicgateway.app.data.api.dto.GuildDto
 import com.runicgateway.app.data.api.dto.HouseDto
+import com.runicgateway.app.data.api.dto.MarketMetaDto
+import com.runicgateway.app.data.api.dto.MarketPageDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
 import com.runicgateway.app.data.api.dto.OnlineStaffDto
 import com.runicgateway.app.data.api.dto.PageDto
+import com.runicgateway.app.data.api.dto.PointsBoardDto
 import com.runicgateway.app.data.api.dto.PostDto
 import com.runicgateway.app.data.api.dto.PresenceDto
+import com.runicgateway.app.data.api.dto.RulesetDto
 import com.runicgateway.app.data.api.dto.SettingsDto
 import com.runicgateway.app.data.api.dto.ShardFeaturesDto
 import com.runicgateway.app.data.api.dto.ShardStatusDto
@@ -137,4 +145,65 @@ interface PublicApi {
 
     @GET("api/v1/public/shard/houses")
     suspend fun getShardHouses(): List<HouseDto>
+
+    // ── Protocol 3.0 shard content (§9 M11) ──────────────────────────────
+    //
+    // Each of these sits behind the website's `requireFeature` gate: a 404 means the
+    // shard doesn't publish it and a 403 means this viewer is below its audience rung,
+    // which `toShardUiState()` folds into one "not available here" state.
+
+    /** The shard's configured ruleset. A `null` body means "not published yet". */
+    @GET("api/v1/public/shard/ruleset")
+    suspend fun getShardRuleset(): RulesetDto?
+
+    /** Every points/loyalty leaderboard the shard publishes. */
+    @GET("api/v1/public/shard/points")
+    suspend fun getShardPoints(): List<PointsBoardDto>
+
+    @GET("api/v1/public/shard/points/{system}")
+    suspend fun getShardPointsBoard(@Path("system") system: String): PointsBoardDto
+
+    /**
+     * Search the player-vendor index. **Rate-limited** — the first genuinely expensive
+     * public endpoint on the site, so handle `429` (`ErrorKind.RATE_LIMITED`).
+     */
+    @GET("api/v1/public/shard/market")
+    suspend fun getShardMarket(
+        @Query("q") query: String? = null,
+        @Query("minPrice") minPrice: Long? = null,
+        @Query("maxPrice") maxPrice: Long? = null,
+        @Query("map") map: String? = null,
+        @Query("region") region: String? = null,
+        @Query("sort") sort: String? = null,
+        @Query("limit") limit: Int? = null,
+        @Query("offset") offset: Int? = null,
+    ): MarketPageDto
+
+    /** Index size, staleness, and which facets/regions actually hold vendors. */
+    @GET("api/v1/public/shard/market/meta")
+    suspend fun getShardMarketMeta(): MarketMetaDto
+
+    @GET("api/v1/public/shard/market/vendors/{serial}")
+    suspend fun getShardMarketVendor(
+        @Path("serial") serial: String,
+        @Query("limit") limit: Int? = null,
+        @Query("offset") offset: Int? = null,
+    ): MarketVendorDto
+
+    // The atlas lives under /public/atlas, NOT /public/shard: it is static shard
+    // content parsed from the server's data files, so it stays readable while the
+    // shard is down — but it IS site-mode gated, unlike the shard routes.
+    @GET("api/v1/public/atlas/creatures")
+    suspend fun getAtlasCreatures(
+        @Query("q") query: String? = null,
+        @Query("facet") facet: String? = null,
+        @Query("limit") limit: Int? = null,
+        @Query("offset") offset: Int? = null,
+    ): AtlasCreaturePageDto
+
+    @GET("api/v1/public/atlas/creatures/{slug}")
+    suspend fun getAtlasCreature(@Path("slug") slug: String): AtlasCreatureDto
+
+    @GET("api/v1/public/atlas/meta")
+    suspend fun getAtlasMeta(): AtlasMetaDto
 }

app/src/main/java/com/runicgateway/app/data/api/dto/ShardContentDto.kt

@@ -0,0 +1,339 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.data.api.dto
+
+import kotlinx.serialization.Serializable
+
+/**
+ * DTOs for the four shard-content surfaces Protocol 3.0 added (PLAN.md §9 M11):
+ * the ruleset, the points leaderboards, the player-vendor marketplace, and the spawn
+ * atlas. Shapes mirror the website's `public/shard.controller.js` + `public/atlas.
+ * controller.js` responses; see `docs/link/v3.md` §5–§8.
+ *
+ * Every field is nullable-with-a-default, which is load-bearing rather than merely
+ * defensive here: an admin can gate individual fields away per audience rung
+ * (`ownerName`, `location`, a board's `name`), so a response legitimately arrives
+ * with them missing and must still decode.
+ */
+
+// ── Ruleset (§5) ────────────────────────────────────────────────────────────
+
+/**
+ * `GET /public/shard/ruleset` — what this shard's world is configured to do.
+ *
+ * Every block is optional and omitted when its system is off, so a null block means
+ * "not applicable here", not "unknown". A `null` BODY (rather than an empty object)
+ * means the shard has never published a ruleset — distinct from the feature being
+ * switched off, which is a 404.
+ */
+@Serializable
+data class RulesetDto(
+    val shard: String? = null,
+    val expansion: String? = null,
+    /**
+     * The public connect address, published only when the operator set one. It is
+     * also the ruleset's one admin-configurable field, so it can be present for a
+     * signed-in viewer and absent for an anonymous one.
+     */
+    val connect: String? = null,
+    /** A flat bag of on/off flags — `cityLoyalty`, `vvv`, `siege`, `chat`, … */
+    val systems: Map<String, Boolean> = emptyMap(),
+    val caps: RulesetCapsDto? = null,
+    val accounts: RulesetAccountsDto? = null,
+    val housing: RulesetHousingDto? = null,
+    val vetRewards: RulesetVetRewardsDto? = null,
+    val vendors: RulesetVendorsDto? = null,
+    val vvv: RulesetVvvDto? = null,
+    val store: RulesetStoreDto? = null,
+    val schedule: RulesetScheduleDto? = null,
+    val updatedAt: String? = null,
+)
+
+/**
+ * Skill and stat caps.
+ *
+ * **[skill] and [totalSkill] are in TENTHS** — 1000 is 100.0 — the way ServUO stores
+ * them, and the raw number is actively misleading rather than merely unhelpful (a
+ * "1000 skill cap" reads as a shard with ten times the usual limit). Use [skillCap]
+ * and [totalSkillCap]. The stat caps below them are plain values.
+ */
+@Serializable
+data class RulesetCapsDto(
+    val skill: Int? = null,
+    val totalSkill: Int? = null,
+    val stat: Int? = null,
+    val str: Int? = null,
+    val dex: Int? = null,
+    val int: Int? = null,
+    val strMax: Int? = null,
+    val dexMax: Int? = null,
+    val intMax: Int? = null,
+) {
+    val skillCap: Double? get() = skill?.let { it / 10.0 }
+    val totalSkillCap: Double? get() = totalSkill?.let { it / 10.0 }
+}
+
+@Serializable
+data class RulesetAccountsDto(
+    val perIp: Int? = null,
+    val charSlots: Int? = null,
+    val autoCreate: Boolean? = null,
+)
+
+@Serializable
+data class RulesetHousingDto(val accountHouseLimit: Int? = null)
+
+@Serializable
+data class RulesetVetRewardsDto(
+    val enabled: Boolean? = null,
+    val rewardIntervalDays: Int? = null,
+)
+
+@Serializable
+data class RulesetVendorsDto(
+    val restockDelayMinutes: Int? = null,
+    val maxSell: Int? = null,
+    val economyStockAmount: Int? = null,
+)
+
+@Serializable
+data class RulesetVvvDto(
+    val enabled: Boolean? = null,
+    val startSilver: Int? = null,
+    val enhancedRules: Boolean? = null,
+)
+
+@Serializable
+data class RulesetStoreDto(
+    val enabled: Boolean? = null,
+    val currencyName: String? = null,
+)
+
+@Serializable
+data class RulesetScheduleDto(
+    val autoSaveFrequencyMinutes: Int? = null,
+    val autoRestartEnabled: Boolean? = null,
+    val autoRestartHour: Int? = null,
+    val autoRestartMinute: Int? = null,
+)
+
+// ── Leaderboards (§7) ───────────────────────────────────────────────────────
+
+/**
+ * One point system's board (`GET /public/shard/points`, `/points/:system`).
+ *
+ * [maxPoints] `0` means **uncapped** and is the common case, and [nameString] is
+ * usually null because most systems name themselves with a cliloc — the same two
+ * traps as [CharPointsDto], documented in full there.
+ *
+ * [players] counts players actually *holding* points, not the entry count: ten of the
+ * shard's systems auto-add a zero-point row for every character ever created, so the
+ * raw count would report the whole census as one system's participants.
+ */
+@Serializable
+data class PointsBoardDto(
+    val system: String? = null,
+    val nameString: String? = null,
+    val nameNumber: Int? = null,
+    val maxPoints: Long? = null,
+    val players: Int? = null,
+    val showOnGump: Boolean = true,
+    val top: List<PointsEntryDto> = emptyList(),
+    val t: Long? = null,
+    val updatedAt: String? = null,
+) {
+    /** The cap, or null when the system is uncapped. */
+    val cap: Long? get() = maxPoints?.takeIf { it > 0 }
+}
+
+/**
+ * A ranked character on a board. [name] is admin-configurable (the `leaderboards`
+ * feature's one field rule), so a shard can publish standings without naming who
+ * holds them — a rank with no name is a valid row, not a broken one.
+ */
+@Serializable
+data class PointsEntryDto(
+    val rank: Int? = null,
+    val serial: String? = null,
+    val name: String? = null,
+    val points: Long? = null,
+)
+
+// ── Marketplace (§8) ────────────────────────────────────────────────────────
+
+/**
+ * Where a shop stands. **Nested, not flattened**, on the wire and in the read model
+ * alike, so that ONE admin rule hides the facet, the coordinates, the region and the
+ * house together — five flat keys would be five rules that drift apart (`v3.md` §8.8).
+ * A null location means an admin gated it away; render that as an answer, not a blank.
+ */
+@Serializable
+data class MarketLocationDto(
+    val map: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val z: Int? = null,
+    val region: String? = null,
+    val house: String? = null,
+)
+
+/** The shop a listing belongs to, as embedded in a search result. */
+@Serializable
+data class MarketVendorRefDto(
+    val serial: String? = null,
+    val shopName: String? = null,
+    val ownerName: String? = null,
+    val location: MarketLocationDto? = null,
+)
+
+/**
+ * One item for sale. [displayName] is resolved server-side against the site's cliloc
+ * table, preferring a player-set [name]; a shard with no cliloc table configured sends
+ * neither and the item renders by id.
+ *
+ * [child] marks an item priced by an enclosing container rather than itself, exactly
+ * as the in-game Vendor Search reports it.
+ */
+@Serializable
+data class MarketListingDto(
+    val serial: String? = null,
+    val itemId: Int? = null,
+    val hue: Int? = null,
+    val amount: Int? = null,
+    val price: Long? = null,
+    val name: String? = null,
+    val cliloc: Int? = null,
+    val displayName: String? = null,
+    val child: Boolean = false,
+    val vendor: MarketVendorRefDto? = null,
+) {
+    /** What to call this item; null when the shard publishes no name for it. */
+    val label: String? get() = name ?: displayName
+}
+
+/**
+ * A page of search results (`GET /public/shard/market`).
+ *
+ * Returns **listings, not vendors**: "who sells a vanquishing kryss and for how much"
+ * is the question, and a vendor-shaped result would make every caller flatten the
+ * shops back out.
+ *
+ * [staleAt] is the oldest vendor timestamp in the index and **must be surfaced**. The
+ * shard sweeps vendors round-robin, so a listing can legitimately be a full cycle old;
+ * a page implying live prices sends someone to an item that sold twenty minutes ago.
+ */
+@Serializable
+data class MarketPageDto(
+    val listings: List<MarketListingDto> = emptyList(),
+    val total: Int = 0,
+    val limit: Int? = null,
+    val offset: Int? = null,
+    val vendors: Int? = null,
+    val staleAt: String? = null,
+)
+
+/**
+ * One shop and its stock (`GET /public/shard/market/vendors/:serial`).
+ *
+ * [truncated] means the shard publishes only the first `MarketMaxListings` of a larger
+ * inventory — [count] is what is published, [total] what the shop holds. Saying so is
+ * the point of this screen: a search result list cannot express it.
+ */
+@Serializable
+data class MarketVendorDto(
+    val serial: String? = null,
+    val shopName: String? = null,
+    val ownerSerial: String? = null,
+    val ownerName: String? = null,
+    val location: MarketLocationDto? = null,
+    val count: Int? = null,
+    val total: Int? = null,
+    val truncated: Boolean = false,
+    val updatedAt: String? = null,
+    val items: List<MarketListingDto> = emptyList(),
+)
+
+/** Index size, staleness and the filter options that actually hold vendors. */
+@Serializable
+data class MarketMetaDto(
+    val vendors: Int = 0,
+    val items: Int = 0,
+    val staleAt: String? = null,
+    val freshAt: String? = null,
+    val maps: List<String> = emptyList(),
+    val regions: List<String> = emptyList(),
+)
+
+// ── Spawn atlas (§6) ────────────────────────────────────────────────────────
+
+/**
+ * A creature in the bestiary. Served from `/public/atlas`, **not** `/public/shard`:
+ * the atlas is static shard *content* parsed from the server's own data files, not
+ * live shard *state*, so it does not go offline with the sidecar — but unlike the
+ * shard routes it IS site-mode gated, like posts and the wiki.
+ *
+ * [points] is a **count** of spawners; [spawners] is the list, and only the
+ * single-creature route sends it. The two names are one letter apart in meaning and
+ * were deliberately separated (`v3.md` §6.3) — do not reuse one for the other.
+ */
+@Serializable
+data class AtlasCreatureDto(
+    val slug: String? = null,
+    val name: String? = null,
+    /** How many can be alive at once, summed across every spawner. */
+    val total: Int? = null,
+    /** How many spawners mention this creature. */
+    val points: Int? = null,
+    /** Spawner count per facet. */
+    val facets: Map<String, Int> = emptyMap(),
+    /** Region/landmark names where it appears — the detail route only. */
+    val places: List<String> = emptyList(),
+    val spawners: List<AtlasSpawnerDto> = emptyList(),
+    val spawnersTruncated: Boolean = false,
+    /** Creatures sharing its spawners — the detail route only. */
+    val alsoHere: List<AtlasCreatureDto> = emptyList(),
+)
+
+/**
+ * One spawn point.
+ *
+ * **[minDelay] / [maxDelay] are SECONDS**, normalised by the server's parser.
+ * XmlSpawner writes them in minutes *except* when a delay doesn't divide into whole
+ * minutes, flagging that per record — so the raw file has `5` meaning five minutes on
+ * one spawner and five seconds on the next, both plausible. The API and this client
+ * carry seconds throughout.
+ */
+@Serializable
+data class AtlasSpawnerDto(
+    val id: Long? = null,
+    val facet: String? = null,
+    val name: String? = null,
+    val x: Int? = null,
+    val y: Int? = null,
+    val maxCount: Int? = null,
+    val minDelay: Int? = null,
+    val maxDelay: Int? = null,
+    val region: String? = null,
+    val landmark: String? = null,
+    /** The server's own "Despise, Felucca" style placement label. */
+    val label: String? = null,
+)
+
+/** A page of creature search results (`GET /public/atlas/creatures`). */
+@Serializable
+data class AtlasCreaturePageDto(
+    val creatures: List<AtlasCreatureDto> = emptyList(),
+    val total: Int = 0,
+    val limit: Int? = null,
+    val offset: Int? = null,
+)
+
+/** When the atlas was last derived from the shard's data files, and what it holds. */
+@Serializable
+data class AtlasMetaDto(
+    val importedAt: String? = null,
+    val generatedAt: String? = null,
+    val counts: Map<String, Int> = emptyMap(),
+    val facets: List<String> = emptyList(),
+)

app/src/main/java/com/runicgateway/app/data/repository/ShardRepository.kt

@@ -8,6 +8,8 @@ import com.runicgateway.app.core.net.ShardStreamEvent
 import com.runicgateway.app.core.result.ApiResult
 import com.runicgateway.app.core.result.safeApiCall
 import com.runicgateway.app.data.api.PublicApi
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasCreaturePageDto
 import com.runicgateway.app.data.api.dto.ChampDto
 import com.runicgateway.app.data.api.dto.EconomySampleDto
 import com.runicgateway.app.data.api.dto.FeedEventDto
@@ -15,8 +17,13 @@ import com.runicgateway.app.data.api.dto.GovernorDto
 import com.runicgateway.app.data.api.dto.GovernorTermDto
 import com.runicgateway.app.data.api.dto.GuildDto
 import com.runicgateway.app.data.api.dto.HouseDto
+import com.runicgateway.app.data.api.dto.MarketMetaDto
+import com.runicgateway.app.data.api.dto.MarketPageDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
 import com.runicgateway.app.data.api.dto.OnlineStaffDto
+import com.runicgateway.app.data.api.dto.PointsBoardDto
 import com.runicgateway.app.data.api.dto.PresenceDto
+import com.runicgateway.app.data.api.dto.RulesetDto
 import com.runicgateway.app.data.api.dto.ShardStatusDto
 import kotlinx.coroutines.flow.Flow
 import kotlinx.serialization.KSerializer
@@ -62,6 +69,59 @@ class ShardRepository @Inject constructor(
 
     suspend fun houses(): ApiResult<List<HouseDto>> = safeApiCall { api.getShardHouses() }
 
+    // ── Protocol 3.0 shard content (§9 M11) ──────────────────────────────
+    //
+    // All four sit behind `requireFeature`, so a 404/403 here is "this shard doesn't
+    // publish it" rather than a fault — see `toShardUiState()`.
+
+    /** The shard ruleset, or `Ok(null)` when the shard has never published one. */
+    suspend fun ruleset(): ApiResult<RulesetDto?> = safeApiCall { api.getShardRuleset() }
+
+    suspend fun pointsBoards(): ApiResult<List<PointsBoardDto>> = safeApiCall { api.getShardPoints() }
+
+    suspend fun pointsBoard(system: String): ApiResult<PointsBoardDto> =
+        safeApiCall { api.getShardPointsBoard(system) }
+
+    suspend fun market(
+        query: String? = null,
+        map: String? = null,
+        region: String? = null,
+        sort: String = SORT_PRICE_ASC,
+        limit: Int = MARKET_PAGE,
+        offset: Int = 0,
+    ): ApiResult<MarketPageDto> = safeApiCall {
+        api.getShardMarket(
+            query = query?.takeIf { it.isNotBlank() },
+            map = map?.takeIf { it.isNotBlank() },
+            region = region?.takeIf { it.isNotBlank() },
+            sort = sort,
+            limit = limit,
+            offset = offset,
+        )
+    }
+
+    suspend fun marketMeta(): ApiResult<MarketMetaDto> = safeApiCall { api.getShardMarketMeta() }
+
+    suspend fun marketVendor(serial: String): ApiResult<MarketVendorDto> =
+        safeApiCall { api.getShardMarketVendor(serial) }
+
+    suspend fun atlasCreatures(
+        query: String? = null,
+        facet: String? = null,
+        limit: Int = ATLAS_PAGE,
+        offset: Int = 0,
+    ): ApiResult<AtlasCreaturePageDto> = safeApiCall {
+        api.getAtlasCreatures(
+            query = query?.takeIf { it.isNotBlank() },
+            facet = facet?.takeIf { it.isNotBlank() },
+            limit = limit,
+            offset = offset,
+        )
+    }
+
+    suspend fun atlasCreature(slug: String): ApiResult<AtlasCreatureDto> =
+        safeApiCall { api.getAtlasCreature(slug) }
+
     // ── Live stream ──────────────────────────────────────────────────────
     /** The shared public SSE feed (safe kinds only), reconnecting with backoff (§7). */
     fun liveEvents(): Flow<ShardStreamEvent> = stream.events()
@@ -73,9 +133,27 @@ class ShardRepository @Inject constructor(
     fun governorFrame(obj: JsonObject): GovernorDto? = decode(obj, GovernorDto.serializer())
     fun presenceFrame(obj: JsonObject): PresenceDto? = decode(obj, PresenceDto.serializer())
 
+    // Protocol 3.0 frames. `world.ruleset` and `points.board` ride the public stream by
+    // default; `vendor.listing` does NOT — the market feature ships with its SSE fan-out
+    // disabled (a live firehose of vendor inventories would be the site's biggest
+    // bandwidth consumer), so the market screen is a plain paginated read and must never
+    // wait on a frame.
+    fun rulesetFrame(obj: JsonObject): RulesetDto? = decode(obj, RulesetDto.serializer())
+    fun pointsBoardFrame(obj: JsonObject): PointsBoardDto? = decode(obj, PointsBoardDto.serializer())
+
     private fun <T> decode(obj: JsonObject, serializer: KSerializer<T>): T? = try {
         json.decodeFromJsonElement(serializer, obj)
     } catch (_: Exception) {
         null
     }
+
+    companion object {
+        const val SORT_PRICE_ASC = "price_asc"
+        const val SORT_PRICE_DESC = "price_desc"
+        const val SORT_RECENT = "recent"
+
+        /** The server caps `limit` at 100; stay well under it on a phone. */
+        const val MARKET_PAGE = 50
+        const val ATLAS_PAGE = 50
+    }
 }

app/src/main/java/com/runicgateway/app/ui/RunicApp.kt

@@ -72,10 +72,16 @@ import com.runicgateway.app.ui.player.CharactersScreen
 import com.runicgateway.app.ui.player.MyHousesScreen
 import com.runicgateway.app.ui.player.VendorsScreen
 import com.runicgateway.app.ui.session.SessionViewModel
+import com.runicgateway.app.ui.shard.AtlasCreatureScreen
+import com.runicgateway.app.ui.shard.AtlasScreen
 import com.runicgateway.app.ui.shard.ChampsScreen
 import com.runicgateway.app.ui.shard.GovernorsScreen
 import com.runicgateway.app.ui.shard.GuildsScreen
 import com.runicgateway.app.ui.shard.HousesScreen
+import com.runicgateway.app.ui.shard.LeaderboardsScreen
+import com.runicgateway.app.ui.shard.MarketScreen
+import com.runicgateway.app.ui.shard.MarketVendorScreen
+import com.runicgateway.app.ui.shard.RulesScreen
 import com.runicgateway.app.ui.shard.ShardBoard
 import com.runicgateway.app.ui.shard.ShardScreen
 import com.runicgateway.app.ui.wiki.WikiPageScreen
@@ -85,6 +91,9 @@ import kotlinx.coroutines.launch
 /** Destinations that show the drawer (hamburger); others show a back arrow. */
 private val TOP_LEVEL_ROUTES = setOf(
     Routes.HOME, Routes.NEWS, Routes.WIKI, Routes.SHARD, Routes.CONTACT, Routes.PAGE, Routes.ACCOUNT,
+    // Protocol 3.0 content screens are drawer destinations, so the drawer gesture works
+    // on them too (M11).
+    Routes.SHARD_RULES, Routes.SHARD_LEADERBOARDS, Routes.SHARD_MARKET, Routes.ATLAS,
     Routes.NOTIFICATIONS,
     Routes.PLAYER_CHARACTERS, Routes.PLAYER_VENDORS, Routes.PLAYER_HOUSES,
     Routes.ADMIN_DASHBOARD, Routes.ADMIN_CONTENT, Routes.ADMIN_MODERATION, Routes.ADMIN_SUPPORT,
@@ -305,6 +314,30 @@ private fun RunicNavHost(
         composable(Routes.SHARD_GUILDS) { GuildsScreen() }
         composable(Routes.SHARD_GOVERNORS) { GovernorsScreen() }
         composable(Routes.SHARD_HOUSES) { HousesScreen() }
+
+        // Protocol 3.0 shard content (M11). Each screen self-reports "not published
+        // here" from its own 404/403, so a deep link to a gated feature still lands on
+        // an honest answer even though the menu hides the entry.
+        composable(Routes.SHARD_RULES) { RulesScreen() }
+        composable(Routes.SHARD_LEADERBOARDS) { LeaderboardsScreen() }
+        composable(Routes.SHARD_MARKET) {
+            MarketScreen(onOpenVendor = { serial -> navController.navigate(Routes.marketVendor(serial)) })
+        }
+        composable(
+            route = Routes.SHARD_MARKET_VENDOR,
+            arguments = listOf(navArgument(Routes.Args.SERIAL) { type = NavType.StringType }),
+        ) { entry ->
+            MarketVendorScreen(serial = entry.arguments?.getString(Routes.Args.SERIAL).orEmpty())
+        }
+        composable(Routes.ATLAS) {
+            AtlasScreen(onOpenCreature = { slug -> navController.navigate(Routes.atlasCreature(slug)) })
+        }
+        composable(
+            route = Routes.ATLAS_CREATURE,
+            arguments = listOf(navArgument(Routes.Args.SLUG) { type = NavType.StringType }),
+        ) { entry ->
+            AtlasCreatureScreen(slug = entry.arguments?.getString(Routes.Args.SLUG).orEmpty())
+        }
         composable(Routes.WIKI) {
             WikiScreen(onOpenPage = { slug -> navController.navigate(Routes.wikiPage(slug)) })
         }

app/src/main/java/com/runicgateway/app/ui/navigation/Menu.kt

@@ -64,6 +64,12 @@ val APP_MENU: List<MenuEntry> = listOf(
     MenuEntry(Routes.NEWS, R.string.menu_news),
     MenuEntry(Routes.WIKI, R.string.menu_wiki),
     MenuEntry(Routes.SHARD, R.string.menu_shard, feature = ShardFeature.STATUS),
+    // Protocol 3.0 shard content (M11). Each hides when the shard doesn't publish it,
+    // which for a brand-new install is every one of them until the plugin has swept.
+    MenuEntry(Routes.SHARD_RULES, R.string.menu_rules, feature = ShardFeature.RULESET),
+    MenuEntry(Routes.ATLAS, R.string.menu_atlas, feature = ShardFeature.ATLAS),
+    MenuEntry(Routes.SHARD_LEADERBOARDS, R.string.menu_leaderboards, feature = ShardFeature.LEADERBOARDS),
+    MenuEntry(Routes.SHARD_MARKET, R.string.menu_market, feature = ShardFeature.MARKET),
     MenuEntry(Routes.page("about"), R.string.menu_about),
     MenuEntry(Routes.CONTACT, R.string.menu_contact),
     MenuEntry(Routes.ACCOUNT, R.string.menu_account, MenuAccess.SIGNED_IN),

app/src/main/java/com/runicgateway/app/ui/navigation/Routes.kt

@@ -34,6 +34,18 @@ object Routes {
     const val SHARD_GOVERNORS = "shard/governors"
     const val SHARD_HOUSES = "shard/houses"
 
+    /**
+     * Protocol 3.0 shard content (M11), each gated by its own visibility feature. The
+     * atlas is not under `shard/` on the wire (`/public/atlas`) because it is static
+     * content rather than live state, but it is a peer of these in the app's nav.
+     */
+    const val SHARD_RULES = "shard/rules"
+    const val SHARD_LEADERBOARDS = "shard/leaderboards"
+    const val SHARD_MARKET = "shard/market"
+    const val SHARD_MARKET_VENDOR = "shard/market/{serial}"
+    const val ATLAS = "atlas"
+    const val ATLAS_CREATURE = "atlas/{slug}"
+
     /** Player game-data groups (§6.3, player-only). Distinct from the public shard boards. */
     const val PLAYER_CHARACTERS = "player/characters"
     const val PLAYER_VENDORS = "player/vendors"
@@ -72,6 +84,12 @@ object Routes {
     /** The character-sheet route for an in-game serial (e.g. "0x24C"). */
     fun playerChar(serial: String) = "player/char/$serial"
 
+    /** One player vendor's shop, by in-game (hex) serial. */
+    fun marketVendor(serial: String) = "shard/market/$serial"
+
+    /** One creature's atlas page, by slug. */
+    fun atlasCreature(slug: String) = "atlas/$slug"
+
     /**
      * The in-app destination a tapped push notification deep-links to (§11, M7
      * Part 2 work item 7). Maps a stream id to the screen that shows its content;

app/src/main/java/com/runicgateway/app/ui/shard/AtlasScreen.kt

@@ -0,0 +1,262 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+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.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasSpawnerDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.SectionLabel
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The spawn atlas / bestiary (PLAN.md §9 M11): "where do I find X".
+ *
+ * The whole point of the feature is the placement transform the server does — a spawn
+ * at 5411,1234 becomes *"Despise, Felucca"* — so a row leads with where a creature is
+ * found, not with coordinates.
+ */
+@Composable
+fun AtlasScreen(
+    onOpenCreature: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: AtlasViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val query by viewModel.query.collectAsStateWithLifecycle()
+
+    Column(modifier.fillMaxSize()) {
+        OutlinedTextField(
+            value = query,
+            onValueChange = viewModel::onQueryChange,
+            label = { Text(stringResource(R.string.atlas_search_label)) },
+            singleLine = true,
+            keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
+            keyboardActions = KeyboardActions(onSearch = { viewModel.search() }),
+            modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 8.dp),
+        )
+
+        when (val s = state) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load)
+            is UiState.Success -> {
+                if (s.data.creatures.isEmpty()) {
+                    EmptyView(stringResource(R.string.atlas_empty))
+                } else {
+                    LazyColumn(
+                        modifier = Modifier.fillMaxSize().padding(horizontal = 16.dp),
+                        verticalArrangement = Arrangement.spacedBy(8.dp),
+                        contentPadding = androidx.compose.foundation.layout.PaddingValues(bottom = 16.dp),
+                    ) {
+                        items(s.data.creatures, key = { it.slug.orEmpty() }) { creature ->
+                            CreatureCard(creature, onOpenCreature)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun CreatureCard(creature: AtlasCreatureDto, onOpenCreature: (String) -> Unit) {
+    val slug = creature.slug
+    Card(
+        Modifier
+            .fillMaxWidth()
+            .then(if (slug != null) Modifier.clickable { onOpenCreature(slug) } else Modifier),
+    ) {
+        Column(Modifier.padding(16.dp)) {
+            Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                Text(
+                    text = creature.name ?: slug.orEmpty(),
+                    style = MaterialTheme.typography.titleSmall,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                // `points` is a COUNT of spawners on this route; `spawners` is the list,
+                // and only the detail route sends it.
+                creature.points?.let {
+                    Text(
+                        text = stringResource(R.string.atlas_spawner_count, it),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            facetSummary(creature)?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+/** One creature: every spawner, where it stands, and what shares its spawns. */
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+fun AtlasCreatureScreen(
+    slug: String,
+    modifier: Modifier = Modifier,
+    viewModel: AtlasCreatureViewModel = hiltViewModel(),
+) {
+    LaunchedEffect(slug) { viewModel.load(slug) }
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val s = state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::retry, modifier = modifier)
+        is UiState.Success -> {
+            val creature = s.data
+            LazyColumn(
+                modifier = modifier.fillMaxSize().padding(horizontal = 16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+                contentPadding = androidx.compose.foundation.layout.PaddingValues(vertical = 16.dp),
+            ) {
+                item {
+                    Column {
+                        Text(
+                            creature.name ?: creature.slug.orEmpty(),
+                            style = MaterialTheme.typography.titleLarge,
+                        )
+                        creature.total?.let {
+                            Text(
+                                stringResource(R.string.atlas_total_alive, it),
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                        if (creature.facets.isNotEmpty()) {
+                            FlowRow(
+                                Modifier.padding(top = 8.dp),
+                                horizontalArrangement = Arrangement.spacedBy(6.dp),
+                                verticalArrangement = Arrangement.spacedBy(6.dp),
+                            ) {
+                                creature.facets.entries.sortedBy { it.key }.forEach { (facet, count) ->
+                                    StatusPill(
+                                        text = stringResource(R.string.atlas_facet_count, facet, count),
+                                        tone = PillTone.Neutral,
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+                if (creature.spawners.isNotEmpty()) {
+                    item { SectionLabel(stringResource(R.string.atlas_section_spawners)) }
+                    items(creature.spawners, key = { it.id ?: it.hashCode().toLong() }) { spawner ->
+                        SpawnerRow(spawner)
+                    }
+                    if (creature.spawnersTruncated) {
+                        item {
+                            Text(
+                                stringResource(R.string.atlas_spawners_truncated),
+                                style = MaterialTheme.typography.labelSmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                    }
+                }
+                if (creature.alsoHere.isNotEmpty()) {
+                    item { SectionLabel(stringResource(R.string.atlas_section_also_here)) }
+                    item {
+                        Text(
+                            creature.alsoHere.mapNotNull { it.name ?: it.slug }.joinToString(", "),
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SpawnerRow(spawner: AtlasSpawnerDto) {
+    Column(Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
+        Text(
+            text = spawnerPlace(spawner),
+            style = MaterialTheme.typography.bodyMedium,
+        )
+        val meta = listOfNotNull(
+            spawner.maxCount?.let { stringResource(R.string.atlas_max_count, it) },
+            // Seconds, normalised server-side — the raw XmlSpawner values are minutes
+            // OR seconds per record.
+            formatRespawn(spawner.minDelay, spawner.maxDelay)
+                ?.let { stringResource(R.string.atlas_respawn, it) },
+        ).joinToString("  ·  ")
+        if (meta.isNotBlank()) {
+            Text(meta, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+    }
+}
+
+// ── Pure helpers (unit-tested) ───────────────────────────────────────────────
+
+/**
+ * Where a spawner stands, preferring the server's own placement label — the
+ * point-in-rect transform is what turns a coordinate into "Despise, Felucca" and is
+ * the reason this feature exists. Falls back through region, landmark, and finally the
+ * raw coordinates, which is honest rather than useless for the ~17% of spawns that
+ * resolve to no named place.
+ */
+internal fun spawnerPlace(spawner: AtlasSpawnerDto): String {
+    spawner.label?.takeIf { it.isNotBlank() }?.let { return it }
+    val place = spawner.region ?: spawner.landmark
+    val facet = spawner.facet
+    return when {
+        place != null && facet != null -> "$place, $facet"
+        place != null -> place
+        spawner.x != null && spawner.y != null ->
+            listOfNotNull(facet, "${spawner.x}, ${spawner.y}").joinToString(" ")
+        else -> facet.orEmpty()
+    }
+}
+
+/**
+ * A creature's facets as one line, most spawners first — "where is it *mostly*" is the
+ * question a search result answers.
+ */
+internal fun facetSummary(creature: AtlasCreatureDto): String? {
+    if (creature.facets.isEmpty()) return null
+    return creature.facets.entries
+        .sortedByDescending { it.value }
+        .joinToString(", ") { it.key }
+}

app/src/main/java/com/runicgateway/app/ui/shard/AtlasViewModel.kt

@@ -0,0 +1,125 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasCreaturePageDto
+import com.runicgateway.app.data.repository.ShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toShardUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The spawn atlas / bestiary (PLAN.md §9 M11, `docs/link/v3.md` §6): where each
+ * creature spawns, derived server-side from the shard's own data files.
+ *
+ * Static shard **content**, not live state — it does not go offline with the sidecar,
+ * and it lives under `/public/atlas`, not `/public/shard`. Unlike the shard routes it
+ * IS site-mode gated, so a site in maintenance withholds it independently.
+ */
+@HiltViewModel
+class AtlasViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<AtlasCreaturePageDto>>(UiState.Loading)
+    val state: StateFlow<UiState<AtlasCreaturePageDto>> = _state.asStateFlow()
+
+    private val _query = MutableStateFlow("")
+    val query: StateFlow<String> = _query.asStateFlow()
+
+    private val _facet = MutableStateFlow<String?>(null)
+    val facet: StateFlow<String?> = _facet.asStateFlow()
+
+    /**
+     * The facets this shard actually has. Discovered from the atlas itself — a shard
+     * may add, replace or rename facets when its maps change, so nothing here may name
+     * one (`v3.md` §6.1 R2).
+     */
+    private val _facets = MutableStateFlow<List<String>>(emptyList())
+    val facets: StateFlow<List<String>> = _facets.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun onQueryChange(value: String) {
+        _query.value = value
+    }
+
+    fun onFacetChange(value: String?) {
+        if (value == _facet.value) return
+        _facet.value = value
+        search()
+    }
+
+    fun search() = load()
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            val page = repository.atlasCreatures(query = _query.value, facet = _facet.value)
+            if (page is ApiResult.Ok && _facets.value.isEmpty()) {
+                // Only the first successful page needs to establish the filter options;
+                // a filtered page would otherwise narrow them to its own results.
+                _facets.value = page.data.creatures
+                    .flatMap { it.facets.keys }
+                    .distinct()
+                    .sorted()
+            }
+            _state.value = page.toShardUiState()
+        }
+    }
+}
+
+/** One creature's detail page: every spawner, and what else shares them. */
+@HiltViewModel
+class AtlasCreatureViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<AtlasCreatureDto>>(UiState.Loading)
+    val state: StateFlow<UiState<AtlasCreatureDto>> = _state.asStateFlow()
+
+    private var slug: String? = null
+
+    fun load(slug: String) {
+        this.slug = slug
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.atlasCreature(slug).toShardUiState()
+        }
+    }
+
+    fun retry() {
+        slug?.let { load(it) }
+    }
+}
+
+/**
+ * A respawn delay as text. **The API carries SECONDS** — XmlSpawner stores minutes
+ * except when a delay doesn't divide into whole minutes, and the server's parser
+ * normalises the two spellings so a `5` is never ambiguous here (`v3.md` §6.3).
+ *
+ * Pure, so the unit conversion is unit-tested rather than eyeballed on a page.
+ */
+internal fun formatRespawn(minSeconds: Int?, maxSeconds: Int?): String? {
+    val lo = minSeconds ?: maxSeconds ?: return null
+    val hi = maxSeconds ?: minSeconds ?: return null
+    return if (lo == hi) humaniseSeconds(lo) else "${humaniseSeconds(lo)}–${humaniseSeconds(hi)}"
+}
+
+private fun humaniseSeconds(seconds: Int): String = when {
+    seconds < 60 -> "${seconds}s"
+    seconds % 60 == 0 -> "${seconds / 60}m"
+    else -> "${seconds / 60}m ${seconds % 60}s"
+}

app/src/main/java/com/runicgateway/app/ui/shard/LeaderboardsScreen.kt

@@ -0,0 +1,131 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Card
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.PointsBoardDto
+import com.runicgateway.app.data.api.dto.PointsEntryDto
+import com.runicgateway.app.ui.components.SectionLabel
+
+/**
+ * The points/loyalty leaderboards (PLAN.md §9 M11), one card per system, live via
+ * `points.board` frames.
+ */
+@Composable
+fun LeaderboardsScreen(
+    modifier: Modifier = Modifier,
+    viewModel: LeaderboardsViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val connected by viewModel.connected.collectAsStateWithLifecycle()
+
+    LiveBoardScreen(
+        emptyMessage = stringResource(R.string.leaderboards_empty),
+        state = state,
+        connected = connected,
+        onRetry = viewModel::load,
+        key = { it.system.orEmpty() },
+        modifier = modifier,
+    ) { board -> BoardCard(board) }
+}
+
+@Composable
+private fun BoardCard(board: PointsBoardDto) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(2.dp)) {
+            Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                Text(
+                    text = boardLabel(board),
+                    style = MaterialTheme.typography.titleMedium,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                board.players?.let {
+                    Text(
+                        text = stringResource(R.string.leaderboards_players, it),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            // A cap is worth stating only when there is one; most systems on a real
+            // shard are uncapped (maxPoints 0), and "/ 0" would be nonsense.
+            board.cap?.let {
+                SectionLabel(stringResource(R.string.leaderboards_cap, it))
+            }
+
+            if (board.top.isEmpty()) {
+                Text(
+                    stringResource(R.string.leaderboards_board_empty),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 6.dp),
+                )
+            } else {
+                HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                board.top.forEach { entry -> EntryRow(entry) }
+            }
+        }
+    }
+}
+
+@Composable
+private fun EntryRow(entry: PointsEntryDto) {
+    Row(
+        Modifier.fillMaxWidth().padding(vertical = 3.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        Text(
+            text = stringResource(
+                R.string.leaderboards_rank_name,
+                entry.rank ?: 0,
+                // The character name is admin-configurable — a shard can publish
+                // standings without naming who holds them, so a nameless rank is a
+                // valid row rather than a broken one.
+                entry.name ?: stringResource(R.string.leaderboards_hidden_name),
+            ),
+            style = MaterialTheme.typography.bodyMedium,
+            maxLines = 1,
+            overflow = TextOverflow.Ellipsis,
+            modifier = Modifier.weight(1f),
+        )
+        Text(
+            text = (entry.points ?: 0L).toString(),
+            style = MaterialTheme.typography.bodyMedium,
+            fontWeight = FontWeight.Medium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+    }
+}
+
+/**
+ * A board's display name: the shard's own literal when it has one, else the humanised
+ * `PointsType` key. The fallback is the PRIMARY path — four of five boards on a real
+ * shard name themselves with a cliloc and send `nameString: null`.
+ */
+internal fun boardLabel(board: PointsBoardDto): String {
+    board.nameString?.takeIf { it.isNotBlank() }?.let { return it }
+    return board.system.orEmpty()
+        .replace(Regex("([a-z0-9])([A-Z])"), "$1 $2")
+        .replaceFirstChar { it.uppercaseChar() }
+}

app/src/main/java/com/runicgateway/app/ui/shard/LeaderboardsViewModel.kt

@@ -0,0 +1,101 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.net.ShardStreamEvent
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.PointsBoardDto
+import com.runicgateway.app.data.repository.ShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toShardUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The points/loyalty leaderboards (PLAN.md §9 M11, `docs/link/v3.md` §7): one board
+ * per point currency the shard publishes, each with its top ranks.
+ *
+ * Served from the website's own store, so the page renders while the shard is down —
+ * which matters more here than for live state: these are standings accumulated over
+ * months, and blanking them during a restart would look like data loss.
+ *
+ * Kept live by `points.board` frames, one per system, merged in place by [LiveBoard].
+ */
+@HiltViewModel
+class LeaderboardsViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val board = LiveBoard<PointsBoardDto> { it.system.orEmpty() }
+
+    private val _state = MutableStateFlow<UiState<List<PointsBoardDto>>>(UiState.Loading)
+    val state: StateFlow<UiState<List<PointsBoardDto>>> = _state.asStateFlow()
+
+    private val _connected = MutableStateFlow(false)
+    val connected: StateFlow<Boolean> = _connected.asStateFlow()
+
+    init {
+        load()
+        collectLive()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            when (val result = repository.pointsBoards()) {
+                is ApiResult.Ok -> {
+                    board.seed(result.data)
+                    publish()
+                }
+                else -> _state.value = result.toShardUiState()
+            }
+        }
+    }
+
+    private fun collectLive() {
+        viewModelScope.launch {
+            repository.liveEvents().collect { event ->
+                when (event) {
+                    is ShardStreamEvent.Open -> _connected.value = true
+                    is ShardStreamEvent.Closed -> _connected.value = false
+                    is ShardStreamEvent.Frame -> applyFrame(event)
+                }
+            }
+        }
+    }
+
+    private fun applyFrame(frame: ShardStreamEvent.Frame) {
+        // There is deliberately no `points.remove` on the wire: the system set is fixed
+        // for a given shard build, the same argument `city.update` makes.
+        if (frame.kind != "points.board") return
+        repository.pointsBoardFrame(frame.data)?.let { board.upsert(it) }
+        if (_state.value is UiState.Success) publish()
+    }
+
+    private fun publish() {
+        _state.value = UiState.Success(orderBoards(board.values()))
+    }
+}
+
+/**
+ * Board display order: most-contested first, then by name, so the boards people
+ * actually compete on lead. Pure, so the ordering is unit-tested.
+ *
+ * Boards the shard flags as not player-facing (`showOnGump = false`) are dropped —
+ * that is the shard's own "is this for players?" signal and the plugin already filters
+ * on it, so this only guards a shard configured to publish extras.
+ */
+internal fun orderBoards(boards: Collection<PointsBoardDto>): List<PointsBoardDto> =
+    boards
+        .filter { it.showOnGump }
+        .sortedWith(
+            compareByDescending<PointsBoardDto> { it.players ?: 0 }
+                .thenBy { (it.nameString ?: it.system).orEmpty().lowercase() },
+        )

app/src/main/java/com/runicgateway/app/ui/shard/MarketScreen.kt

@@ -0,0 +1,260 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.MarketListingDto
+import com.runicgateway.app.data.api.dto.MarketLocationDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.SectionLabel
+
+/**
+ * The shard-wide marketplace (PLAN.md §9 M11): search every player vendor's stock.
+ *
+ * The staleness line under the search box is required, not decoration — see
+ * [MarketViewModel]. Results are listings, so a row names both the item and the shop
+ * that sells it, and tapping it opens that shop.
+ */
+@Composable
+fun MarketScreen(
+    onOpenVendor: (String) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: MarketViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val meta by viewModel.meta.collectAsStateWithLifecycle()
+    val query by viewModel.query.collectAsStateWithLifecycle()
+
+    Column(modifier.fillMaxSize()) {
+        OutlinedTextField(
+            value = query,
+            onValueChange = viewModel::onQueryChange,
+            label = { Text(stringResource(R.string.market_search_label)) },
+            singleLine = true,
+            // Searched on submit rather than per keystroke: this is the site's first
+            // rate-limited public endpoint.
+            keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
+            keyboardActions = KeyboardActions(onSearch = { viewModel.search() }),
+            modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 8.dp),
+        )
+        meta?.staleAt?.let {
+            SectionLabel(
+                text = stringResource(R.string.market_staleness),
+                modifier = Modifier.padding(horizontal = 16.dp),
+            )
+        }
+
+        when (val s = state) {
+            is UiState.Loading -> LoadingView()
+            is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load)
+            is UiState.Success -> {
+                if (s.data.listings.isEmpty()) {
+                    EmptyView(stringResource(R.string.market_empty))
+                } else {
+                    LazyColumn(
+                        modifier = Modifier.fillMaxSize().padding(horizontal = 16.dp),
+                        verticalArrangement = Arrangement.spacedBy(8.dp),
+                        contentPadding = androidx.compose.foundation.layout.PaddingValues(bottom = 16.dp),
+                    ) {
+                        items(s.data.listings, key = { it.serial ?: it.hashCode().toString() }) { listing ->
+                            ListingCard(listing, onOpenVendor)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ListingCard(listing: MarketListingDto, onOpenVendor: (String) -> Unit) {
+    val vendorSerial = listing.vendor?.serial
+    Card(
+        Modifier
+            .fillMaxWidth()
+            .then(if (vendorSerial != null) Modifier.clickable { onOpenVendor(vendorSerial) } else Modifier),
+    ) {
+        Column(Modifier.padding(16.dp)) {
+            Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
+                Text(
+                    text = listingTitle(listing)
+                        ?: stringResource(R.string.market_unnamed_item, listing.itemId ?: 0),
+                    style = MaterialTheme.typography.titleSmall,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                Text(
+                    text = stringResource(R.string.market_price, listing.price ?: 0L),
+                    style = MaterialTheme.typography.titleSmall,
+                    fontWeight = FontWeight.Medium,
+                )
+            }
+            val shop = listing.vendor?.shopName ?: listing.vendor?.ownerName
+            if (shop != null) {
+                Text(
+                    text = shop,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                )
+            }
+            locationLine(listing.vendor?.location)?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+/**
+ * One shop and its stock. The only surface that can answer the two questions a result
+ * list can't: how much of a truncated shop is published, and where a shop is when the
+ * shard doesn't say.
+ */
+@Composable
+fun MarketVendorScreen(
+    serial: String,
+    modifier: Modifier = Modifier,
+    viewModel: MarketVendorViewModel = hiltViewModel(),
+) {
+    androidx.compose.runtime.LaunchedEffect(serial) { viewModel.load(serial) }
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val s = state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::retry, modifier = modifier)
+        is UiState.Success -> VendorContent(s.data, modifier)
+    }
+}
+
+@Composable
+private fun VendorContent(vendor: MarketVendorDto, modifier: Modifier = Modifier) {
+    LazyColumn(
+        modifier = modifier.fillMaxSize().padding(horizontal = 16.dp),
+        verticalArrangement = Arrangement.spacedBy(8.dp),
+        contentPadding = androidx.compose.foundation.layout.PaddingValues(vertical = 16.dp),
+    ) {
+        item {
+            Column {
+                Text(
+                    vendor.shopName ?: stringResource(R.string.market_unnamed_shop),
+                    style = MaterialTheme.typography.titleLarge,
+                )
+                vendor.ownerName?.let {
+                    Text(
+                        stringResource(R.string.market_owner, it),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                Text(
+                    // A gated location is a real answer, not a blank: the shard has
+                    // this shop, it just doesn't publish where it stands.
+                    text = locationLine(vendor.location) ?: stringResource(R.string.market_location_hidden),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                if (vendor.truncated) {
+                    Text(
+                        text = stringResource(
+                            R.string.market_truncated,
+                            vendor.count ?: vendor.items.size,
+                            vendor.total ?: 0,
+                        ),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        modifier = Modifier.padding(top = 6.dp),
+                    )
+                }
+            }
+        }
+        if (vendor.items.isEmpty()) {
+            item { Text(stringResource(R.string.market_shop_empty), style = MaterialTheme.typography.bodyMedium) }
+        } else {
+            items(vendor.items, key = { it.serial ?: it.hashCode().toString() }) { item ->
+                Row(Modifier.fillMaxWidth().padding(vertical = 4.dp), horizontalArrangement = Arrangement.SpaceBetween) {
+                    Text(
+                        text = listingTitle(item) ?: stringResource(R.string.market_unnamed_item, item.itemId ?: 0),
+                        style = MaterialTheme.typography.bodyMedium,
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                        modifier = Modifier.weight(1f),
+                    )
+                    Text(
+                        text = stringResource(R.string.market_price, item.price ?: 0L),
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
+// ── Pure helpers (unit-tested) ───────────────────────────────────────────────
+
+/**
+ * What to call a listing: a player-set name, else the server-resolved cliloc name,
+ * else null so the caller can fall back to the item id. A shard with no cliloc table
+ * configured legitimately publishes neither.
+ *
+ * A stack shows its count, since "12 × ingot" and "ingot" at the same price are very
+ * different offers.
+ */
+internal fun listingTitle(listing: MarketListingDto): String? {
+    val base = listing.label ?: return null
+    val amount = listing.amount ?: 1
+    return if (amount > 1) "$amount × $base" else base
+}
+
+/**
+ * A shop's whereabouts as one line, or null when the shard publishes no location —
+ * which happens both because an admin gated the field and because the nesting means
+ * the WHOLE block goes at once, never a half-populated one.
+ */
+internal fun locationLine(location: MarketLocationDto?): String? {
+    if (location == null) return null
+    val place = location.house ?: location.region
+    val facet = location.map
+    return when {
+        place != null && facet != null -> "$place, $facet"
+        place != null -> place
+        facet != null -> facet
+        else -> null
+    }
+}

app/src/main/java/com/runicgateway/app/ui/shard/MarketViewModel.kt

@@ -0,0 +1,118 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.result.ApiResult
+import com.runicgateway.app.data.api.dto.MarketMetaDto
+import com.runicgateway.app.data.api.dto.MarketPageDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
+import com.runicgateway.app.data.repository.ShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toShardUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The shard-wide player-vendor marketplace (PLAN.md §9 M11, `docs/link/v3.md` §8):
+ * search every shop's stock at once.
+ *
+ * **Not live, on purpose.** The `market` feature ships with its SSE fan-out disabled —
+ * a firehose of full vendor inventories would be the site's biggest bandwidth consumer
+ * and no screen needs it live — so this is a plain paginated read. It is also the
+ * first genuinely **rate-limited** public endpoint, which is why the query is applied
+ * on submit rather than on every keystroke.
+ *
+ * The staleness stamp from [meta] is not decoration: the shard sweeps vendors
+ * round-robin, so a listing can legitimately be a full cycle behind, and a screen that
+ * implied live prices would send someone to an item that sold twenty minutes ago.
+ */
+@HiltViewModel
+class MarketViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<MarketPageDto>>(UiState.Loading)
+    val state: StateFlow<UiState<MarketPageDto>> = _state.asStateFlow()
+
+    private val _meta = MutableStateFlow<MarketMetaDto?>(null)
+    val meta: StateFlow<MarketMetaDto?> = _meta.asStateFlow()
+
+    private val _query = MutableStateFlow("")
+    val query: StateFlow<String> = _query.asStateFlow()
+
+    private val _sort = MutableStateFlow(ShardRepository.SORT_PRICE_ASC)
+    val sort: StateFlow<String> = _sort.asStateFlow()
+
+    init {
+        load()
+    }
+
+    fun onQueryChange(value: String) {
+        // Bounded to what the server accepts, so an over-long query is trimmed here
+        // rather than bounced as a 400.
+        _query.value = value.take(MAX_QUERY)
+    }
+
+    fun onSortChange(value: String) {
+        if (value == _sort.value) return
+        _sort.value = value
+        search()
+    }
+
+    /** Run the current query. Called on submit, not per keystroke — this endpoint is rate-limited. */
+    fun search() = load()
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            // Meta is secondary: the staleness banner and filter options are worth
+            // having, but a failure there must not blank the results.
+            _meta.value = (repository.marketMeta() as? ApiResult.Ok)?.data
+            _state.value = repository.market(
+                query = _query.value,
+                sort = _sort.value,
+            ).toShardUiState()
+        }
+    }
+
+    companion object {
+        /** The server rejects a longer `q`. */
+        const val MAX_QUERY = 60
+    }
+}
+
+/**
+ * One shop and its stock. The only surface that can render the two states a result
+ * list cannot: a [MarketVendorDto.truncated] shop, and a location an admin has gated
+ * away — which is a real answer ("the shard doesn't publish where this is") rather
+ * than an empty coordinate.
+ */
+@HiltViewModel
+class MarketVendorViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<MarketVendorDto>>(UiState.Loading)
+    val state: StateFlow<UiState<MarketVendorDto>> = _state.asStateFlow()
+
+    private var serial: String? = null
+
+    fun load(serial: String) {
+        this.serial = serial
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.marketVendor(serial).toShardUiState()
+        }
+    }
+
+    fun retry() {
+        serial?.let { load(it) }
+    }
+}

app/src/main/java/com/runicgateway/app/ui/shard/RulesScreen.kt

@@ -0,0 +1,207 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.compose.foundation.layout.Arrangement
+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.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.runicgateway.app.R
+import com.runicgateway.app.data.api.dto.RulesetCapsDto
+import com.runicgateway.app.data.api.dto.RulesetDto
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.components.EmptyView
+import com.runicgateway.app.ui.components.ErrorView
+import com.runicgateway.app.ui.components.LoadingView
+import com.runicgateway.app.ui.components.PillTone
+import com.runicgateway.app.ui.components.StatusPill
+
+/**
+ * The shard ruleset (PLAN.md §9 M11): what this world is configured to do.
+ *
+ * Every block renders only when the shard published it — an omitted block means the
+ * system is off, not that the value is unknown, so an empty section would assert
+ * something false.
+ */
+@Composable
+fun RulesScreen(
+    modifier: Modifier = Modifier,
+    viewModel: RulesViewModel = hiltViewModel(),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+
+    when (val s = state) {
+        is UiState.Loading -> LoadingView(modifier)
+        is UiState.Error -> ErrorView(s.kind, onRetry = viewModel::load, modifier = modifier)
+        is UiState.Success -> {
+            val ruleset = s.data
+            // A null body is a successful read of a shard that has never published its
+            // ruleset — distinct from the feature being switched off, which is an error
+            // state above.
+            if (ruleset == null) {
+                EmptyView(stringResource(R.string.rules_unpublished), modifier)
+            } else {
+                RulesetContent(ruleset, modifier)
+            }
+        }
+    }
+}
+
+@Composable
+private fun RulesetContent(ruleset: RulesetDto, modifier: Modifier = Modifier) {
+    LazyColumn(
+        modifier = modifier.fillMaxSize().padding(horizontal = 16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+        contentPadding = androidx.compose.foundation.layout.PaddingValues(vertical = 16.dp),
+    ) {
+        item {
+            RuleCard(stringResource(R.string.rules_section_shard)) {
+                RuleRow(stringResource(R.string.rules_name), ruleset.shard)
+                RuleRow(stringResource(R.string.rules_expansion), ruleset.expansion)
+                // `connect` is the ruleset's one admin-configurable field: an operator
+                // who published an address may still want it behind a login, so its
+                // absence here is a setting, not a missing value.
+                RuleRow(stringResource(R.string.rules_connect), ruleset.connect)
+            }
+        }
+        if (ruleset.systems.isNotEmpty()) {
+            item { SystemsCard(ruleset.systems) }
+        }
+        ruleset.caps?.let { caps -> item { CapsCard(caps) } }
+        item {
+            val accounts = ruleset.accounts
+            val housing = ruleset.housing
+            if (accounts != null || housing != null) {
+                RuleCard(stringResource(R.string.rules_section_accounts)) {
+                    RuleRow(stringResource(R.string.rules_char_slots), accounts?.charSlots?.toString())
+                    RuleRow(stringResource(R.string.rules_per_ip), accounts?.perIp?.toString())
+                    RuleRow(
+                        stringResource(R.string.rules_house_limit),
+                        housing?.accountHouseLimit?.toString(),
+                    )
+                }
+            }
+        }
+        ruleset.vendors?.let { vendors ->
+            item {
+                RuleCard(stringResource(R.string.rules_section_vendors)) {
+                    RuleRow(
+                        stringResource(R.string.rules_restock_delay),
+                        vendors.restockDelayMinutes?.let { stringResource(R.string.rules_minutes, it) },
+                    )
+                    RuleRow(stringResource(R.string.rules_max_sell), vendors.maxSell?.toString())
+                }
+            }
+        }
+        ruleset.schedule?.let { schedule ->
+            item {
+                RuleCard(stringResource(R.string.rules_section_schedule)) {
+                    RuleRow(
+                        stringResource(R.string.rules_autosave),
+                        schedule.autoSaveFrequencyMinutes?.let { stringResource(R.string.rules_minutes, it) },
+                    )
+                    RuleRow(
+                        stringResource(R.string.rules_autorestart),
+                        formatRestart(
+                            schedule.autoRestartEnabled,
+                            schedule.autoRestartHour,
+                            schedule.autoRestartMinute,
+                        ),
+                    )
+                }
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+private fun SystemsCard(systems: Map<String, Boolean>) {
+    RuleCard(stringResource(R.string.rules_section_systems)) {
+        FlowRow(
+            Modifier.padding(top = 6.dp),
+            horizontalArrangement = Arrangement.spacedBy(6.dp),
+            verticalArrangement = Arrangement.spacedBy(6.dp),
+        ) {
+            // Sorted so the list is stable across reloads; the wire order is a config
+            // read order and carries no meaning.
+            systems.entries.sortedBy { it.key }.forEach { (key, on) ->
+                StatusPill(
+                    text = humaniseSystem(key),
+                    tone = if (on) PillTone.Success else PillTone.Neutral,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun CapsCard(caps: RulesetCapsDto) {
+    RuleCard(stringResource(R.string.rules_section_caps)) {
+        // Skill caps arrive in TENTHS (1000 = 100.0). Showing the raw number would read
+        // as a shard with ten times the usual limit.
+        RuleRow(stringResource(R.string.rules_skill_cap), caps.skillCap?.let { formatSkillCap(it) })
+        RuleRow(stringResource(R.string.rules_total_skill_cap), caps.totalSkillCap?.let { formatSkillCap(it) })
+        RuleRow(stringResource(R.string.rules_stat_cap), caps.stat?.toString())
+        RuleRow(stringResource(R.string.rules_str_cap), caps.str?.toString())
+        RuleRow(stringResource(R.string.rules_dex_cap), caps.dex?.toString())
+        RuleRow(stringResource(R.string.rules_int_cap), caps.int?.toString())
+    }
+}
+
+@Composable
+private fun RuleCard(title: String, content: @Composable () -> Unit) {
+    Card(Modifier.fillMaxWidth()) {
+        Column(Modifier.padding(16.dp)) {
+            Text(title, style = MaterialTheme.typography.titleMedium)
+            content()
+        }
+    }
+}
+
+/** One label/value line. Renders nothing when the shard published no value. */
+@Composable
+private fun RuleRow(label: String, value: String?) {
+    if (value.isNullOrBlank()) return
+    Row(
+        Modifier.fillMaxWidth().padding(top = 6.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        Text(label, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        Text(value, style = MaterialTheme.typography.bodyMedium)
+    }
+}
+
+// ── Pure helpers (unit-tested) ───────────────────────────────────────────────
+
+/** `cityLoyalty` → "City loyalty". The systems block is a flat bag of config keys. */
+internal fun humaniseSystem(key: String): String = key
+    .replace(Regex("([a-z0-9])([A-Z])"), "$1 $2")
+    .replaceFirstChar { it.uppercaseChar() }
+
+/** A skill cap already converted out of tenths: drop the ".0" on whole values. */
+internal fun formatSkillCap(value: Double): String =
+    if (value % 1.0 == 0.0) value.toInt().toString() else "%.1f".format(value)
+
+/** The auto-restart schedule, or null when the shard doesn't run one. */
+internal fun formatRestart(enabled: Boolean?, hour: Int?, minute: Int?): String? {
+    if (enabled != true) return null
+    if (hour == null) return null
+    return "%02d:%02d".format(hour, minute ?: 0)
+}

app/src/main/java/com/runicgateway/app/ui/shard/RulesViewModel.kt

@@ -0,0 +1,63 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.runicgateway.app.core.net.ShardStreamEvent
+import com.runicgateway.app.data.api.dto.RulesetDto
+import com.runicgateway.app.data.repository.ShardRepository
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.ui.toShardUiState
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * The shard ruleset (PLAN.md §9 M11, `docs/link/v3.md` §5): what this world is
+ * configured to do — systems on/off, caps, account and housing limits, the champion
+ * and Felucca tables, the save/restart schedule.
+ *
+ * Two states the screen must tell apart, which is why the success type is nullable:
+ * a `null` body means the shard has **never published** a ruleset (the plugin is old,
+ * or `RulesetEnabled=false`), while the feature being switched off is a 404 folded
+ * into `ErrorKind.FEATURE_UNAVAILABLE`.
+ *
+ * Kept live by the `world.ruleset` frame, which the shard re-emits on every sidecar
+ * reconnect — so a shard that restarts with edited config updates the open screen.
+ */
+@HiltViewModel
+class RulesViewModel @Inject constructor(
+    private val repository: ShardRepository,
+) : ViewModel() {
+
+    private val _state = MutableStateFlow<UiState<RulesetDto?>>(UiState.Loading)
+    val state: StateFlow<UiState<RulesetDto?>> = _state.asStateFlow()
+
+    init {
+        load()
+        collectLive()
+    }
+
+    fun load() {
+        _state.value = UiState.Loading
+        viewModelScope.launch {
+            _state.value = repository.ruleset().toShardUiState()
+        }
+    }
+
+    private fun collectLive() {
+        viewModelScope.launch {
+            repository.liveEvents().collect { event ->
+                if (event !is ShardStreamEvent.Frame || event.kind != "world.ruleset") return@collect
+                // The frame IS the whole ruleset — replace rather than merge. A frame the
+                // app can't decode is skipped, leaving the loaded copy in place.
+                repository.rulesetFrame(event.data)?.let { _state.value = UiState.Success(it) }
+            }
+        }
+    }
+}

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

@@ -41,6 +41,10 @@
     <string name="menu_news">News</string>
     <string name="menu_wiki">Wiki</string>
     <string name="menu_shard">Shard</string>
+    <string name="menu_rules">Rules</string>
+    <string name="menu_atlas">Atlas</string>
+    <string name="menu_leaderboards">Leaderboards</string>
+    <string name="menu_market">Market</string>
     <string name="menu_about">About</string>
     <string name="menu_contact">Contact</string>
     <string name="menu_account">My account</string>
@@ -382,6 +386,74 @@
     <string name="guilds_leader">Led by %1$s</string>
     <string name="guilds_alliance">Alliance: %1$s</string>
 
+    <!-- ── Rules / ruleset (Protocol 3.0 §5, M11) ──────────────────────── -->
+    <!-- A successful read of a shard that has never published its ruleset — NOT the same
+         as the feature being switched off, which renders as an error state. -->
+    <string name="rules_unpublished">This shard hasn\'t published its ruleset yet.</string>
+    <string name="rules_section_shard">Shard</string>
+    <string name="rules_section_systems">Systems</string>
+    <string name="rules_section_caps">Skill &amp; stat caps</string>
+    <string name="rules_section_accounts">Accounts &amp; housing</string>
+    <string name="rules_section_vendors">Vendors</string>
+    <string name="rules_section_schedule">Saves &amp; restarts</string>
+    <string name="rules_name">Name</string>
+    <string name="rules_expansion">Expansion</string>
+    <string name="rules_connect">Connect</string>
+    <string name="rules_skill_cap">Individual skill cap</string>
+    <string name="rules_total_skill_cap">Total skill cap</string>
+    <string name="rules_stat_cap">Total stat cap</string>
+    <string name="rules_str_cap">Strength cap</string>
+    <string name="rules_dex_cap">Dexterity cap</string>
+    <string name="rules_int_cap">Intelligence cap</string>
+    <string name="rules_char_slots">Character slots</string>
+    <string name="rules_per_ip">Accounts per IP</string>
+    <string name="rules_house_limit">Houses per account</string>
+    <string name="rules_restock_delay">Vendor restock delay</string>
+    <string name="rules_max_sell">Max sell quantity</string>
+    <string name="rules_autosave">Auto-save every</string>
+    <string name="rules_autorestart">Auto-restart at</string>
+    <string name="rules_minutes">%1$d min</string>
+
+    <!-- ── Leaderboards (Protocol 3.0 §7, M11) ─────────────────────────── -->
+    <string name="leaderboards_empty">This shard isn\'t publishing any leaderboards yet.</string>
+    <string name="leaderboards_board_empty">Nobody has scored here yet.</string>
+    <string name="leaderboards_players">%1$d players</string>
+    <!-- Only shown for capped systems; most systems on a real shard are uncapped. -->
+    <string name="leaderboards_cap">Cap: %1$d</string>
+    <string name="leaderboards_rank_name">#%1$d  %2$s</string>
+    <!-- A shard may publish standings without naming who holds them (the board's one
+         admin-configurable field). -->
+    <string name="leaderboards_hidden_name">Someone</string>
+
+    <!-- ── Market (Protocol 3.0 §8, M11) ───────────────────────────────── -->
+    <string name="market_search_label">Search every shop</string>
+    <string name="market_empty">No listings match that search.</string>
+    <string name="market_shop_empty">This shop has nothing for sale.</string>
+    <!-- Required, not decoration: the shard sweeps vendors round-robin, so a price can
+         legitimately be a full cycle old. -->
+    <string name="market_staleness">Prices are refreshed in rotation and may be out of date.</string>
+    <string name="market_price">%1$d gp</string>
+    <string name="market_unnamed_item">Item %1$d</string>
+    <string name="market_unnamed_shop">A shop</string>
+    <string name="market_owner">Kept by %1$s</string>
+    <!-- A gated location is a real answer: the shop exists, the shard just doesn't say
+         where it stands. -->
+    <string name="market_location_hidden">This shard doesn\'t publish shop locations.</string>
+    <string name="market_truncated">Showing %1$d of %2$d — this shop holds more than the shard publishes.</string>
+
+    <!-- ── Spawn atlas (Protocol 3.0 §6, M11) ──────────────────────────── -->
+    <string name="atlas_search_label">Search creatures</string>
+    <string name="atlas_empty">No creatures match that search.</string>
+    <string name="atlas_spawner_count">%1$d spawners</string>
+    <string name="atlas_total_alive">Up to %1$d alive at once</string>
+    <string name="atlas_facet_count">%1$s (%2$d)</string>
+    <string name="atlas_section_spawners">Spawn points</string>
+    <string name="atlas_section_also_here">Also spawns here</string>
+    <string name="atlas_spawners_truncated">More spawn points than shown.</string>
+    <string name="atlas_max_count">Up to %1$d</string>
+    <!-- The delay is already in seconds; the server normalizes XmlSpawner's mixed units. -->
+    <string name="atlas_respawn">Respawn %1$s</string>
+
     <!-- ── Governors (§6.2) ────────────────────────────────────────────── -->
     <string name="governors_empty">No governors — this shard may not run the City Loyalty system.</string>
     <string name="governor_current">Governed by %1$s</string>

app/src/test/java/com/runicgateway/app/data/api/fake/FakePublicApi.kt

@@ -18,6 +18,14 @@ import com.runicgateway.app.data.api.dto.PageDto
 import com.runicgateway.app.data.api.dto.PostDto
 import com.runicgateway.app.data.api.dto.PresenceDto
 import com.runicgateway.app.data.api.dto.SettingsDto
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasCreaturePageDto
+import com.runicgateway.app.data.api.dto.AtlasMetaDto
+import com.runicgateway.app.data.api.dto.MarketMetaDto
+import com.runicgateway.app.data.api.dto.MarketPageDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
+import com.runicgateway.app.data.api.dto.PointsBoardDto
+import com.runicgateway.app.data.api.dto.RulesetDto
 import com.runicgateway.app.data.api.dto.ShardFeaturesDto
 import com.runicgateway.app.data.api.dto.ShardStatusDto
 import com.runicgateway.app.data.api.dto.StatusDto
@@ -59,6 +67,24 @@ class FakePublicApi : PublicApi {
     var houses: List<HouseDto> = emptyList()
     var shardFeatures: ShardFeaturesDto = ShardFeaturesDto()
 
+    // Protocol 3.0 content (M11). `ruleset` is nullable on the wire: null means the
+    // shard has never published one, which is a success, not a failure.
+    var ruleset: RulesetDto? = null
+    var pointsBoards: List<PointsBoardDto> = emptyList()
+    var pointsBoard: PointsBoardDto = PointsBoardDto()
+    var market: MarketPageDto = MarketPageDto()
+    var marketMeta: MarketMetaDto = MarketMetaDto()
+    var marketVendor: MarketVendorDto = MarketVendorDto()
+    var atlasCreatures: AtlasCreaturePageDto = AtlasCreaturePageDto()
+    var atlasCreature: AtlasCreatureDto = AtlasCreatureDto()
+    var atlasMeta: AtlasMetaDto = AtlasMetaDto()
+
+    /** Last market query seen, so a test can assert blanks were dropped. */
+    var lastMarketQuery: String? = null
+
+    /** Last atlas facet filter seen. */
+    var lastAtlasFacet: String? = null
+
     /** Last contact request body seen (so a test can assert it was trimmed/forwarded). */
     var lastContact: ContactRequest? = null
 
@@ -87,6 +113,40 @@ class FakePublicApi : PublicApi {
     }
 
     override suspend fun getShardFeatures(): ShardFeaturesDto = reply(shardFeatures)
+    override suspend fun getShardRuleset(): RulesetDto? = reply(ruleset)
+    override suspend fun getShardPoints(): List<PointsBoardDto> = reply(pointsBoards)
+    override suspend fun getShardPointsBoard(system: String): PointsBoardDto = reply(pointsBoard)
+
+    override suspend fun getShardMarket(
+        query: String?,
+        minPrice: Long?,
+        maxPrice: Long?,
+        map: String?,
+        region: String?,
+        sort: String?,
+        limit: Int?,
+        offset: Int?,
+    ): MarketPageDto {
+        lastMarketQuery = query
+        return reply(market)
+    }
+
+    override suspend fun getShardMarketMeta(): MarketMetaDto = reply(marketMeta)
+    override suspend fun getShardMarketVendor(serial: String, limit: Int?, offset: Int?): MarketVendorDto =
+        reply(marketVendor)
+
+    override suspend fun getAtlasCreatures(
+        query: String?,
+        facet: String?,
+        limit: Int?,
+        offset: Int?,
+    ): AtlasCreaturePageDto {
+        lastAtlasFacet = facet
+        return reply(atlasCreatures)
+    }
+
+    override suspend fun getAtlasCreature(slug: String): AtlasCreatureDto = reply(atlasCreature)
+    override suspend fun getAtlasMeta(): AtlasMetaDto = reply(atlasMeta)
     override suspend fun getShardStatus(): ShardStatusDto = reply(shardStatus)
     override suspend fun getShardFeed(kind: String?, limit: Int?): List<FeedEventDto> = reply(shardFeed)
     override suspend fun getShardEconomy(limit: Int?): List<EconomySampleDto> = reply(shardEconomy)

app/src/test/java/com/runicgateway/app/ui/shard/ShardContentHelpersTest.kt

@@ -0,0 +1,172 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasSpawnerDto
+import com.runicgateway.app.data.api.dto.MarketListingDto
+import com.runicgateway.app.data.api.dto.MarketLocationDto
+import com.runicgateway.app.data.api.dto.PointsBoardDto
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+/**
+ * The pure display helpers behind the four Protocol 3.0 screens (PLAN.md §9 M11).
+ * Each one exists because the raw wire value would be wrong or misleading on screen —
+ * units in tenths, delays in seconds, an "uncapped" cap of zero, a gated field.
+ */
+class ShardContentHelpersTest {
+
+    // ── Rules (§5) ───────────────────────────────────────────────────────
+
+    @Test fun skillCapsConvertOutOfTenths() {
+        // 1000 is 100.0. Showing the raw number reads as a shard with ten times the
+        // usual limit, which is worse than showing nothing.
+        assertEquals("100", formatSkillCap(1000 / 10.0))
+        assertEquals("72.5", formatSkillCap(725 / 10.0))
+    }
+
+    @Test fun systemKeysHumanise() {
+        // Word boundaries become spaces and the inner capital is kept, matching the
+        // website's `humanise` — "City Loyalty" is the system's actual name.
+        assertEquals("City Loyalty", humaniseSystem("cityLoyalty"))
+        assertEquals("Vvv", humaniseSystem("vvv"))
+        assertEquals("Treasure Maps", humaniseSystem("treasureMaps"))
+    }
+
+    @Test fun theRestartScheduleOnlyShowsWhenTheShardRunsOne() {
+        assertEquals("04:30", formatRestart(enabled = true, hour = 4, minute = 30))
+        assertEquals("04:00", formatRestart(enabled = true, hour = 4, minute = null))
+        assertNull(formatRestart(enabled = false, hour = 4, minute = 30))
+        assertNull(formatRestart(enabled = true, hour = null, minute = 30))
+    }
+
+    // ── Leaderboards (§7) ────────────────────────────────────────────────
+
+    @Test fun boardLabelFallsBackToTheHumanisedKey() {
+        // The PRIMARY path: four of five boards on a real shard name themselves with a
+        // cliloc and send nameString null.
+        assertEquals("Queens Loyalty", boardLabel(PointsBoardDto(system = "QueensLoyalty")))
+        assertEquals(
+            "Queen's Loyalty",
+            boardLabel(PointsBoardDto(system = "QueensLoyalty", nameString = "Queen's Loyalty")),
+        )
+        assertEquals("Clean Up Britannia", boardLabel(PointsBoardDto(system = "CleanUpBritannia", nameString = "  ")))
+    }
+
+    @Test fun anUncappedBoardReportsNoCap() {
+        assertNull(PointsBoardDto(maxPoints = 0).cap)
+        assertEquals(30000L, PointsBoardDto(maxPoints = 30000).cap)
+    }
+
+    @Test fun boardsOrderByContestedThenName() {
+        val boards = listOf(
+            PointsBoardDto(system = "Quiet", players = 2),
+            PointsBoardDto(system = "Busy", players = 900),
+            PointsBoardDto(system = "AlsoQuiet", players = 2),
+        )
+        assertEquals(listOf("Busy", "Also Quiet", "Quiet"), orderBoards(boards).map { boardLabel(it) })
+    }
+
+    @Test fun boardsTheShardHidesFromItsOwnGumpAreDropped() {
+        // `showOnGump` is the shard's own "is this player-facing?" signal.
+        val boards = listOf(
+            PointsBoardDto(system = "Shown", players = 1, showOnGump = true),
+            PointsBoardDto(system = "Internal", players = 99, showOnGump = false),
+        )
+        assertEquals(listOf("Shown"), orderBoards(boards).map { it.system })
+    }
+
+    // ── Market (§8) ──────────────────────────────────────────────────────
+
+    @Test fun listingTitlePrefersAPlayerNameThenTheResolvedOne() {
+        assertEquals("Bob's axe", listingTitle(MarketListingDto(name = "Bob's axe", displayName = "hatchet")))
+        assertEquals("hatchet", listingTitle(MarketListingDto(displayName = "hatchet")))
+    }
+
+    @Test fun listingTitleIsNullWithoutAnyName() {
+        // A shard with no cliloc table configured publishes neither, and the screen
+        // falls back to the item id rather than inventing a label.
+        assertNull(listingTitle(MarketListingDto(itemId = 3922)))
+    }
+
+    @Test fun aStackShowsItsCount() {
+        // "12 × ingot" and "ingot" at the same price are very different offers.
+        assertEquals("12 × ingot", listingTitle(MarketListingDto(displayName = "ingot", amount = 12)))
+        assertEquals("ingot", listingTitle(MarketListingDto(displayName = "ingot", amount = 1)))
+        assertEquals("ingot", listingTitle(MarketListingDto(displayName = "ingot", amount = null)))
+    }
+
+    @Test fun locationPrefersTheHouseThenTheRegion() {
+        assertEquals(
+            "Darrow's Tower, Felucca",
+            locationLine(MarketLocationDto(map = "Felucca", region = "Britain", house = "Darrow's Tower")),
+        )
+        assertEquals("Britain, Felucca", locationLine(MarketLocationDto(map = "Felucca", region = "Britain")))
+        assertEquals("Felucca", locationLine(MarketLocationDto(map = "Felucca")))
+    }
+
+    @Test fun aGatedLocationIsNullRatherThanAHalfAnswer() {
+        // The block is nested precisely so one admin rule takes the facet, the
+        // coordinates, the region and the house together — there is no partial state
+        // to render.
+        assertNull(locationLine(null))
+        assertNull(locationLine(MarketLocationDto(x = 100, y = 200)))
+    }
+
+    // ── Atlas (§6) ───────────────────────────────────────────────────────
+
+    @Test fun respawnDelaysAreReadAsSeconds() {
+        // The API normalises XmlSpawner's mixed minutes/seconds, so these ARE seconds.
+        assertEquals("30s", formatRespawn(30, 30))
+        assertEquals("5m", formatRespawn(300, 300))
+        assertEquals("5m–10m", formatRespawn(300, 600))
+        assertEquals("1m 30s", formatRespawn(90, 90))
+    }
+
+    @Test fun aHalfSpecifiedRespawnStillReads() {
+        assertEquals("5m", formatRespawn(300, null))
+        assertEquals("5m", formatRespawn(null, 300))
+        assertNull(formatRespawn(null, null))
+    }
+
+    @Test fun spawnerPlacePrefersTheServersPlacementLabel() {
+        // The point-in-rect transform is the reason this feature exists: it turns
+        // "5411,1234" into "Despise, Felucca".
+        val spawner = AtlasSpawnerDto(
+            label = "Despise, Felucca",
+            region = "Despise",
+            facet = "Felucca",
+            x = 5411,
+            y = 1234,
+        )
+        assertEquals("Despise, Felucca", spawnerPlace(spawner))
+    }
+
+    @Test fun spawnerPlaceFallsBackThroughRegionLandmarkThenCoordinates() {
+        assertEquals(
+            "Despise, Felucca",
+            spawnerPlace(AtlasSpawnerDto(region = "Despise", facet = "Felucca")),
+        )
+        assertEquals(
+            "Yew Crossroads, Trammel",
+            spawnerPlace(AtlasSpawnerDto(landmark = "Yew Crossroads", facet = "Trammel")),
+        )
+        // ~17% of stock spawns resolve to no named place; coordinates are honest there.
+        assertEquals(
+            "Felucca 5411, 1234",
+            spawnerPlace(AtlasSpawnerDto(facet = "Felucca", x = 5411, y = 1234)),
+        )
+    }
+
+    @Test fun facetSummaryLeadsWithWhereItMostlyIs() {
+        val creature = AtlasCreatureDto(
+            slug = "lizardman",
+            facets = mapOf("Trammel" to 4, "Felucca" to 30, "Ilshenar" to 12),
+        )
+        assertEquals("Felucca, Ilshenar, Trammel", facetSummary(creature))
+        assertNull(facetSummary(AtlasCreatureDto(slug = "unique")))
+    }
+}

app/src/test/java/com/runicgateway/app/ui/shard/ShardContentViewModelTest.kt

@@ -0,0 +1,223 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package com.runicgateway.app.ui.shard
+
+import com.runicgateway.app.core.net.ShardStreamEvent
+import com.runicgateway.app.data.api.dto.AtlasCreatureDto
+import com.runicgateway.app.data.api.dto.AtlasCreaturePageDto
+import com.runicgateway.app.data.api.dto.MarketListingDto
+import com.runicgateway.app.data.api.dto.MarketPageDto
+import com.runicgateway.app.data.api.dto.MarketVendorDto
+import com.runicgateway.app.data.api.dto.PointsBoardDto
+import com.runicgateway.app.data.api.dto.RulesetDto
+import com.runicgateway.app.data.api.fake.FakePublicApi
+import com.runicgateway.app.data.api.fake.FakeShardStream
+import com.runicgateway.app.data.repository.ShardRepository
+import com.runicgateway.app.ui.ErrorKind
+import com.runicgateway.app.ui.UiState
+import com.runicgateway.app.util.MainDispatcherRule
+import com.runicgateway.app.util.httpError
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.put
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+
+/**
+ * The four Protocol 3.0 content screens (PLAN.md §9 M11): loading, the live merge, and
+ * the states that are easy to get wrong — "published nothing" vs "switched off", and a
+ * gated feature reading as unavailable rather than as a fault.
+ */
+class ShardContentViewModelTest {
+
+    @get:Rule val mainDispatcherRule = MainDispatcherRule()
+
+    private val api = FakePublicApi()
+    private val json = Json { ignoreUnknownKeys = true; explicitNulls = false; coerceInputValues = true }
+
+    private fun repo(stream: FakeShardStream = FakeShardStream()) = ShardRepository(api, stream, json)
+
+    // ── Rules ────────────────────────────────────────────────────────────
+
+    @Test fun rulesLoadTheRuleset() {
+        api.ruleset = RulesetDto(shard = "UOMysticmoon", expansion = "EJ")
+
+        val state = RulesViewModel(repo()).state.value
+
+        assertEquals("UOMysticmoon", (state as UiState.Success).data?.shard)
+    }
+
+    @Test fun anUnpublishedRulesetIsASuccessWithNoBody() {
+        // Distinct from the feature being switched off: the shard is reachable and
+        // simply hasn't emitted world.ruleset yet.
+        api.ruleset = null
+
+        val state = RulesViewModel(repo()).state.value
+
+        assertTrue(state is UiState.Success)
+        assertNull((state as UiState.Success).data)
+    }
+
+    @Test fun aGatedRulesetFeatureReadsAsUnavailableNotAsAFault() {
+        api.error = httpError(404)
+
+        val state = RulesViewModel(repo()).state.value
+
+        assertEquals(ErrorKind.FEATURE_UNAVAILABLE, (state as UiState.Error).kind)
+    }
+
+    @Test fun aLiveRulesetFrameReplacesTheLoadedCopy() {
+        // The frame IS the whole ruleset — the shard re-emits it on every reconnect, so
+        // a restart with edited config updates an open screen.
+        api.ruleset = RulesetDto(shard = "Old", expansion = "EJ")
+        val stream = FakeShardStream(
+            listOf(
+                ShardStreamEvent.Frame(
+                    "world.ruleset",
+                    buildJsonObject { put("shard", "New"); put("expansion", "EJ") },
+                ),
+            ),
+        )
+
+        val state = RulesViewModel(repo(stream)).state.value
+
+        assertEquals("New", (state as UiState.Success).data?.shard)
+    }
+
+    // ── Leaderboards ─────────────────────────────────────────────────────
+
+    @Test fun leaderboardsSeedAndMergeLiveBoards() {
+        api.pointsBoards = listOf(
+            PointsBoardDto(system = "QueensLoyalty", players = 800),
+            PointsBoardDto(system = "VoidPool", players = 10),
+        )
+        val stream = FakeShardStream(
+            listOf(
+                ShardStreamEvent.Frame(
+                    "points.board",
+                    buildJsonObject { put("system", "VoidPool"); put("players", 999) },
+                ),
+            ),
+        )
+
+        val boards = (LeaderboardsViewModel(repo(stream)).state.value as UiState.Success).data
+
+        // The merged board overtook the seeded one on the contested ordering.
+        assertEquals(listOf("VoidPool", "QueensLoyalty"), boards.map { it.system })
+    }
+
+    @Test fun aGatedLeaderboardsFeatureReadsAsUnavailable() {
+        api.error = httpError(403)
+
+        val state = LeaderboardsViewModel(repo()).state.value
+
+        assertEquals(ErrorKind.FEATURE_UNAVAILABLE, (state as UiState.Error).kind)
+    }
+
+    // ── Market ───────────────────────────────────────────────────────────
+
+    @Test fun marketLoadsListingsAndMeta() {
+        api.market = MarketPageDto(
+            listings = listOf(MarketListingDto(serial = "0x1", displayName = "hatchet", price = 250)),
+            total = 1,
+        )
+
+        val vm = MarketViewModel(repo())
+
+        assertEquals(1, (vm.state.value as UiState.Success).data.listings.size)
+    }
+
+    @Test fun aBlankMarketQueryIsNotSentAsAnEmptyFilter() {
+        MarketViewModel(repo())
+        assertNull(api.lastMarketQuery)
+    }
+
+    @Test fun theMarketQueryIsBoundedToWhatTheServerAccepts() {
+        // Trimmed here rather than bounced as a 400.
+        val vm = MarketViewModel(repo())
+        vm.onQueryChange("x".repeat(200))
+        assertEquals(MarketViewModel.MAX_QUERY, vm.query.value.length)
+    }
+
+    @Test fun aFailedMetaLookupDoesNotBlankTheResults() {
+        // Meta drives the staleness banner and the filter options; it is secondary.
+        api.market = MarketPageDto(listings = listOf(MarketListingDto(serial = "0x1")), total = 1)
+
+        val vm = MarketViewModel(repo())
+
+        assertTrue(vm.state.value is UiState.Success)
+    }
+
+    @Test fun aVendorLoadsBySerialAndKeepsItForRetry() {
+        api.marketVendor = MarketVendorDto(serial = "0x40001234", shopName = "Darrow's Wares", truncated = true)
+
+        val vm = MarketVendorViewModel(repo())
+        vm.load("0x40001234")
+
+        val vendor = (vm.state.value as UiState.Success).data
+        assertEquals("Darrow's Wares", vendor.shopName)
+        assertTrue(vendor.truncated)
+
+        // Retry re-uses the serial rather than needing it passed again.
+        api.error = httpError(500)
+        vm.retry()
+        assertTrue(vm.state.value is UiState.Error)
+    }
+
+    // ── Atlas ────────────────────────────────────────────────────────────
+
+    @Test fun atlasLoadsCreaturesAndDiscoversTheShardsFacets() {
+        // Nothing may NAME a facet — a shard can add, replace or rename them, so the
+        // filter options come from the shard's own data.
+        api.atlasCreatures = AtlasCreaturePageDto(
+            creatures = listOf(
+                AtlasCreatureDto(slug = "lizardman", facets = mapOf("Felucca" to 30, "Sosaria" to 2)),
+                AtlasCreatureDto(slug = "orc", facets = mapOf("Underdark" to 5)),
+            ),
+            total = 2,
+        )
+
+        val vm = AtlasViewModel(repo())
+
+        assertEquals(2, (vm.state.value as UiState.Success).data.creatures.size)
+        assertEquals(listOf("Felucca", "Sosaria", "Underdark"), vm.facets.value)
+    }
+
+    @Test fun aFilteredPageDoesNotNarrowTheFacetOptions() {
+        api.atlasCreatures = AtlasCreaturePageDto(
+            creatures = listOf(AtlasCreatureDto(slug = "a", facets = mapOf("Felucca" to 1, "Trammel" to 1))),
+        )
+        val vm = AtlasViewModel(repo())
+        assertEquals(listOf("Felucca", "Trammel"), vm.facets.value)
+
+        // Filtering to one facet must not leave the picker with only that option.
+        api.atlasCreatures = AtlasCreaturePageDto(
+            creatures = listOf(AtlasCreatureDto(slug = "a", facets = mapOf("Felucca" to 1))),
+        )
+        vm.onFacetChange("Felucca")
+
+        assertEquals(listOf("Felucca", "Trammel"), vm.facets.value)
+        assertEquals("Felucca", api.lastAtlasFacet)
+    }
+
+    @Test fun aGatedAtlasReadsAsUnavailable() {
+        api.error = httpError(404)
+
+        val state = AtlasViewModel(repo()).state.value
+
+        assertEquals(ErrorKind.FEATURE_UNAVAILABLE, (state as UiState.Error).kind)
+    }
+
+    @Test fun aCreatureLoadsBySlug() {
+        api.atlasCreature = AtlasCreatureDto(slug = "lizardman", name = "Lizardman", total = 214)
+
+        val vm = AtlasCreatureViewModel(repo())
+        vm.load("lizardman")
+
+        assertEquals(214, (vm.state.value as UiState.Success).data.total)
+    }
+}