feat: NIP-72 compliance fixes + standalone Communities screen

Quartz (NIP-72 compliance)
- Fix CommunityDefinition image() builder to use the NIP-72 ImageTag
  (was wrongly pointing at the NIP-23 ImageTag, which prevented the
  builder from attaching `<W>x<H>` dimensions).
- Fix CommunityPostApproval notifyAuthor() to emit a `p` tag for the
  post author as required by NIP-72 (was duplicating the `e` tag).
- Add RelayTag.MARKER_AUTHOR/REQUESTS/APPROVALS constants.

Amethyst - Communities screen
- New top-level Communities screen with FeedFilterSpinner TopNav that
  supports the Mine option (filters to communities authored by the
  logged-in user).
- New Route.Communities + drawer entry.
- New CommunitiesFeedFilter (subclass of DiscoverCommunityFeedFilter
  using defaultCommunitiesFollowList + Mine handling).
- New CommunitiesListFilterAssembler/SubAssembler with dedicated
  filterCommunitiesMine relay query.
- Account.liveCommunitiesFollowLists + settings.defaultCommunitiesFollowList.
- TopNavFilterState.communityRoutes (includes Mine).

Amethyst - Create Community
- Route.NewCommunity + FAB on the Communities screen.
- NewCommunityModel + Material3 form: name, description, image URL,
  rules, moderator pubkeys, relay requests/approvals URLs.
- Signs a kind 34550 CommunityDefinitionEvent and auto-follows it so
  it appears under "Mine".
- Account.sendCommunityDefinition helper.

Misc
- Extracted parseTopFilterOrDefault helper in LocalPreferences to keep
  the existing inner load method under the JVM method-size limit.

amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt

@@ -547,17 +547,17 @@ object LocalPreferences {
 
                     Log.d("LocalPreferences") { "Load account from file $npub - before parsing events" }
 
-                    val defaultHomeFollowList = async { parseOrNull<TopFilter>(defaultHomeFollowListStr) ?: TopFilter.AllFollows }
+                    val defaultHomeFollowList = async { parseTopFilterOrDefault(defaultHomeFollowListStr, TopFilter.AllFollows) }
-                    val defaultStoriesFollowList = async { parseOrNull<TopFilter>(defaultStoriesFollowListStr) ?: TopFilter.Global }
+                    val defaultStoriesFollowList = async { parseTopFilterOrDefault(defaultStoriesFollowListStr, TopFilter.Global) }
-                    val defaultNotificationFollowList = async { parseOrNull<TopFilter>(defaultNotificationFollowListStr) ?: TopFilter.Global }
+                    val defaultNotificationFollowList = async { parseTopFilterOrDefault(defaultNotificationFollowListStr, TopFilter.Global) }
-                    val defaultDiscoveryFollowList = async { parseOrNull<TopFilter>(defaultDiscoveryFollowListStr) ?: TopFilter.Global }
+                    val defaultDiscoveryFollowList = async { parseTopFilterOrDefault(defaultDiscoveryFollowListStr, TopFilter.Global) }
 
-                    val defaultPollsFollowList = async { parseOrNull<TopFilter>(defaultPollsFollowListStr) ?: TopFilter.Global }
+                    val defaultPollsFollowList = async { parseTopFilterOrDefault(defaultPollsFollowListStr, TopFilter.Global) }
-                    val defaultPicturesFollowList = async { parseOrNull<TopFilter>(defaultPicturesFollowListStr) ?: TopFilter.Global }
+                    val defaultPicturesFollowList = async { parseTopFilterOrDefault(defaultPicturesFollowListStr, TopFilter.Global) }
-                    val defaultProductsFollowList = async { parseOrNull<TopFilter>(defaultProductsFollowListStr) ?: TopFilter.AroundMe }
+                    val defaultProductsFollowList = async { parseTopFilterOrDefault(defaultProductsFollowListStr, TopFilter.AroundMe) }
-                    val defaultShortsFollowList = async { parseOrNull<TopFilter>(defaultShortsFollowListStr) ?: TopFilter.Global }
+                    val defaultShortsFollowList = async { parseTopFilterOrDefault(defaultShortsFollowListStr, TopFilter.Global) }
-                    val defaultLongsFollowList = async { parseOrNull<TopFilter>(defaultLongsFollowListStr) ?: TopFilter.Global }
+                    val defaultLongsFollowList = async { parseTopFilterOrDefault(defaultLongsFollowListStr, TopFilter.Global) }
-                    val defaultArticlesFollowList = async { parseOrNull<TopFilter>(defaultArticlesFollowListStr) ?: TopFilter.AllFollows }
+                    val defaultArticlesFollowList = async { parseTopFilterOrDefault(defaultArticlesFollowListStr, TopFilter.AllFollows) }
 
                     val nwcWalletsLoaded =
                         async {
@@ -672,6 +672,20 @@ object LocalPreferences {
         return result
     }
 
+    private fun parseTopFilterOrDefault(
+        value: String?,
+        default: TopFilter,
+    ): TopFilter {
+        if (value.isNullOrEmpty() || value == "null") return default
+        return try {
+            JsonMapper.fromJson<TopFilter>(value)
+        } catch (e: Throwable) {
+            if (e is CancellationException) throw e
+            Log.w("LocalPreferences", "Error Decoding TopFilter from Preferences with value $value", e)
+            default
+        }
+    }
+
     private inline fun <reified T : Any> parseOrNull(value: String?): T? {
         if (value.isNullOrEmpty() || value == "null") {
             return null

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -223,6 +223,8 @@ import com.vitorpamplona.quartz.nip71Video.VideoNormalEvent
 import com.vitorpamplona.quartz.nip71Video.VideoShortEvent
 import com.vitorpamplona.quartz.nip72ModCommunities.approval.CommunityPostApprovalEvent
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.ModeratorTag
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.RelayTag
 import com.vitorpamplona.quartz.nip88Polls.poll.PollEvent
 import com.vitorpamplona.quartz.nip88Polls.response.PollResponseEvent
 import com.vitorpamplona.quartz.nip90Dvms.contentDiscoveryRequest.NIP90ContentDiscoveryRequestEvent
@@ -481,6 +483,9 @@ class Account(
     val liveBadgesFollowLists: StateFlow<IFeedTopNavFilter> = topNavFilterFlow(settings.defaultBadgesFollowList)
     val liveBadgesFollowListsPerRelay = OutboxLoaderState(liveBadgesFollowLists, cache, scope).flow
 
+    val liveCommunitiesFollowLists: StateFlow<IFeedTopNavFilter> = topNavFilterFlow(settings.defaultCommunitiesFollowList)
+    val liveCommunitiesFollowListsPerRelay = OutboxLoaderState(liveCommunitiesFollowLists, cache, scope).flow
+
     override fun isWriteable(): Boolean = settings.isWriteable()
 
     suspend fun updateWarnReports(warnReports: Boolean): Boolean {
@@ -1161,6 +1166,34 @@ class Account(
         client.publish(signedEvent, relays)
     }
 
+    suspend fun sendCommunityDefinition(
+        name: String,
+        description: String,
+        moderators: List<ModeratorTag>,
+        image: String? = null,
+        rules: String? = null,
+        relays: List<RelayTag>? = null,
+        dTag: String,
+    ): CommunityDefinitionEvent? {
+        if (!isWriteable()) return null
+
+        val template =
+            CommunityDefinitionEvent.build(
+                name = name,
+                description = description,
+                moderators = moderators,
+                image = image,
+                rules = rules,
+                relays = relays,
+                dTag = dTag,
+            )
+        val signedEvent = signer.sign(template)
+
+        cache.justConsumeMyOwnEvent(signedEvent)
+        client.publish(signedEvent, computeRelayListToBroadcast(signedEvent))
+        return signedEvent
+    }
+
     private fun loadCurrentAcceptedBadges(): List<AcceptedBadge> {
         val newNote = cache.getAddressableNoteIfExists(ProfileBadgesEvent.createAddress(signer.pubKey))
         val newEvent = newNote?.event as? ProfileBadgesEvent

amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt

@@ -191,6 +191,7 @@ class AccountSettings(
     val defaultLongsFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
     val defaultArticlesFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.AllFollows),
     val defaultBadgesFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Mine),
+    val defaultCommunitiesFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.AllFollows),
     val nwcWallets: MutableStateFlow<List<NwcWalletEntryNorm>> = MutableStateFlow(emptyList()),
     val defaultNwcWalletId: MutableStateFlow<String?> = MutableStateFlow(null),
     var hideDeleteRequestDialog: Boolean = false,
@@ -466,6 +467,17 @@ class AccountSettings(
         }
     }
 
+    fun changeDefaultCommunitiesFollowList(name: FeedDefinition) {
+        changeDefaultCommunitiesFollowList(name.code)
+    }
+
+    fun changeDefaultCommunitiesFollowList(name: TopFilter) {
+        if (defaultCommunitiesFollowList.value != name) {
+            defaultCommunitiesFollowList.tryEmit(name)
+            saveAccountSettings()
+        }
+    }
+
     fun changeDefaultPicturesFollowList(name: FeedDefinition) {
         changeDefaultPicturesFollowList(name.code)
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/RelaySubscriptionsCoordinator.kt

@@ -35,6 +35,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.dataso
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.rooms.datasource.ChatroomListFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chess.datasource.ChessFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.datasource.CommunityFilterAssembler
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource.CommunitiesListFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.datasource.DiscoveryFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.followPacks.feed.datasource.FollowPackFeedFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash.datasource.GeoHashFilterAssembler
@@ -101,6 +102,7 @@ class RelaySubscriptionsCoordinator(
     val articles = ArticlesFilterAssembler(client)
     val badges = BadgesFilterAssembler(client)
     val profileBadges = ProfileBadgesFilterAssembler(client)
+    val communitiesList = CommunitiesListFilterAssembler(client)
 
     // active when sending zaps via NWC
     val nwc = NWCPaymentFilterAssembler(client)
@@ -120,6 +122,7 @@ class RelaySubscriptionsCoordinator(
             articles,
             badges,
             profileBadges,
+            communitiesList,
             channelFinder,
             eventFinder,
             userFinder,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/feeds/RememberForeverStates.kt

@@ -59,6 +59,7 @@ object ScrollStateKeys {
     const val POLLS_OPEN = "PollsOpenFeed"
     const val POLLS_CLOSED = "PollsClosedFeed"
     const val BADGES_SCREEN = "BadgesFeed"
+    const val COMMUNITIES_LIST = "CommunitiesListFeed"
     const val PICTURES_SCREEN = "PicturesFeed"
     const val PRODUCTS_SCREEN = "ProductsFeed"
     const val SHORTS_SCREEN = "ShortsFeed"

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt

@@ -93,6 +93,8 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.rooms.MessagesScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chess.ChessGameScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chess.ChessLobbyScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.CommunityScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.CommunitiesScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.newCommunity.NewCommunityScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.DiscoverScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip23LongForm.LongFormPostScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip99Classifieds.NewProductScreen
@@ -221,6 +223,8 @@ fun BuildNavigation(
         composable<Route.Discover> { DiscoverScreen(accountViewModel, nav) }
         composableArgs<Route.Notification> { NotificationScreen(it.scrollToEventId, accountViewModel, nav) }
         composableFromEnd<Route.Polls> { PollsScreen(accountViewModel, nav) }
+        composableFromEnd<Route.Communities> { CommunitiesScreen(accountViewModel, nav) }
+        composableFromEnd<Route.NewCommunity> { NewCommunityScreen(accountViewModel, nav) }
         composableFromEnd<Route.Badges> { BadgesScreen(accountViewModel, nav) }
         composableFromEnd<Route.ProfileBadges> { ProfileBadgesScreen(accountViewModel, nav) }
         composableFromBottomArgs<Route.AwardBadge> { AwardBadgeScreen(it.kind, it.pubKeyHex, it.dTag, accountViewModel, nav) }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/drawer/DrawerContent.kt

@@ -58,6 +58,7 @@ import androidx.compose.material.icons.outlined.AccountBalanceWallet
 import androidx.compose.material.icons.outlined.CollectionsBookmark
 import androidx.compose.material.icons.outlined.Drafts
 import androidx.compose.material.icons.outlined.GroupAdd
+import androidx.compose.material.icons.outlined.Groups
 import androidx.compose.material.icons.outlined.Language
 import androidx.compose.material.icons.outlined.MilitaryTech
 import androidx.compose.material.icons.outlined.Photo
@@ -619,6 +620,14 @@ fun ListContent(
             route = Route.Badges,
         )
 
+        NavigationRow(
+            title = R.string.communities,
+            icon = Icons.Outlined.Groups,
+            tint = MaterialTheme.colorScheme.onBackground,
+            nav = nav,
+            route = Route.Communities,
+        )
+
         NavigationRow(
             title = R.string.discover_marketplace,
             icon = Icons.Outlined.Storefront,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt

@@ -45,6 +45,10 @@ sealed class Route {
 
     @Serializable object Polls : Route()
 
+    @Serializable object Communities : Route()
+
+    @Serializable object NewCommunity : Route()
+
     @Serializable object Badges : Route()
 
     @Serializable object ProfileBadges : Route()

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/TopNavFilterState.kt

@@ -275,6 +275,18 @@ class TopNavFilterState(
             )
         }
 
+    private val _communityRoutes =
+        livePeopleListsFlow.transform { peopleLists ->
+            checkNotInMainThread()
+            emit(
+                listOf(
+                    listOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow),
+                    peopleLists,
+                    listOf(muteListFollow),
+                ).flatten().toImmutableList(),
+            )
+        }
+
     private val _kind3GlobalPeople =
         livePeopleListsFlow.transform { peopleLists ->
             checkNotInMainThread()
@@ -302,6 +314,11 @@ class TopNavFilterState(
             .flowOn(Dispatchers.IO)
             .stateIn(scope, SharingStarted.Eagerly, persistentListOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow, muteListFollow))
 
+    val communityRoutes =
+        _communityRoutes
+            .flowOn(Dispatchers.IO)
+            .stateIn(scope, SharingStarted.Eagerly, persistentListOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow, muteListFollow))
+
     fun destroy() {
         Log.d("Init") { "OnCleared: ${this.javaClass.simpleName}" }
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountFeedContentStates.kt

@@ -31,6 +31,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.articles.dal.ArticlesFeedFi
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.badges.dal.BadgesFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.rooms.dal.ChatroomListKnownFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.rooms.dal.ChatroomListNewFeedFilter
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.dal.CommunitiesFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip23LongForm.DiscoverLongFormFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip28Chats.DiscoverChatFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip51FollowSets.DiscoverFollowSetsFeedFilter
@@ -84,6 +85,8 @@ class AccountFeedContentStates(
 
     val badgesFeed = FeedContentState(BadgesFeedFilter(account), scope, LocalCache)
 
+    val communitiesList = FeedContentState(CommunitiesFeedFilter(account), scope, LocalCache)
+
     val picturesFeed = FeedContentState(PictureFeedFilter(account), scope, LocalCache)
     val productsFeed = FeedContentState(ProductsFeedFilter(account), scope, LocalCache)
     val shortsFeed = FeedContentState(ShortsFeedFilter(account), scope, LocalCache)
@@ -130,6 +133,8 @@ class AccountFeedContentStates(
 
         badgesFeed.updateFeedWith(newNotes)
 
+        communitiesList.updateFeedWith(newNotes)
+
         picturesFeed.updateFeedWith(newNotes)
         productsFeed.updateFeedWith(newNotes)
         shortsFeed.updateFeedWith(newNotes)
@@ -170,6 +175,8 @@ class AccountFeedContentStates(
 
         badgesFeed.deleteFromFeed(newNotes)
 
+        communitiesList.deleteFromFeed(newNotes)
+
         picturesFeed.deleteFromFeed(newNotes)
         productsFeed.deleteFromFeed(newNotes)
         shortsFeed.deleteFromFeed(newNotes)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/CommunitiesScreen.kt

@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list
+
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedContentState
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedState
+import com.vitorpamplona.amethyst.ui.actions.CrossfadeIfEnabled
+import com.vitorpamplona.amethyst.ui.feeds.FeedEmpty
+import com.vitorpamplona.amethyst.ui.feeds.FeedError
+import com.vitorpamplona.amethyst.ui.feeds.LoadingFeed
+import com.vitorpamplona.amethyst.ui.feeds.RefresheableBox
+import com.vitorpamplona.amethyst.ui.feeds.SaveableFeedContentState
+import com.vitorpamplona.amethyst.ui.feeds.ScrollStateKeys
+import com.vitorpamplona.amethyst.ui.feeds.WatchLifecycleAndUpdateModel
+import com.vitorpamplona.amethyst.ui.layouts.DisappearingScaffold
+import com.vitorpamplona.amethyst.ui.layouts.rememberFeedContentPadding
+import com.vitorpamplona.amethyst.ui.navigation.bottombars.AppBottomBar
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.routes.Route
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource.CommunitiesListFilterAssemblerSubscription
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.ChannelCardCompose
+import com.vitorpamplona.amethyst.ui.theme.DividerThickness
+import com.vitorpamplona.amethyst.ui.theme.FeedPadding
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
+
+@Composable
+fun CommunitiesScreen(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    CommunitiesScreen(
+        feedContentState = accountViewModel.feedStates.communitiesList,
+        accountViewModel = accountViewModel,
+        nav = nav,
+    )
+}
+
+@Composable
+fun CommunitiesScreen(
+    feedContentState: FeedContentState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    WatchLifecycleAndUpdateModel(feedContentState)
+    WatchAccountForCommunitiesScreen(feedContentState, accountViewModel)
+    CommunitiesListFilterAssemblerSubscription(accountViewModel)
+
+    DisappearingScaffold(
+        isInvertedLayout = false,
+        topBar = {
+            CommunitiesTopBar(accountViewModel, nav)
+        },
+        bottomBar = {
+            AppBottomBar(Route.Communities, accountViewModel) { route ->
+                if (route == Route.Communities) {
+                    feedContentState.sendToTop()
+                } else {
+                    nav.newStack(route)
+                }
+            }
+        },
+        floatingButton = {
+            NewCommunityButton(nav)
+        },
+        accountViewModel = accountViewModel,
+    ) {
+        RefresheableBox(feedContentState, true) {
+            SaveableFeedContentState(feedContentState, scrollStateKey = ScrollStateKeys.COMMUNITIES_LIST) { listState ->
+                RenderCommunitiesFeed(
+                    feedContentState = feedContentState,
+                    listState = listState,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun RenderCommunitiesFeed(
+    feedContentState: FeedContentState,
+    listState: LazyListState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val feedState by feedContentState.feedContent.collectAsStateWithLifecycle()
+
+    CrossfadeIfEnabled(
+        targetState = feedState,
+        animationSpec = tween(durationMillis = 100),
+        label = "RenderCommunitiesFeed",
+        accountViewModel = accountViewModel,
+    ) { state ->
+        when (state) {
+            is FeedState.Empty -> FeedEmpty(feedContentState::invalidateData)
+            is FeedState.FeedError -> FeedError(state.errorMessage, feedContentState::invalidateData)
+            is FeedState.Loaded -> CommunitiesFeedLoaded(state, listState, accountViewModel, nav)
+            is FeedState.Loading -> LoadingFeed()
+        }
+    }
+}
+
+@Composable
+private fun CommunitiesFeedLoaded(
+    loaded: FeedState.Loaded,
+    listState: LazyListState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val items by loaded.feed.collectAsStateWithLifecycle()
+
+    LazyColumn(
+        contentPadding = rememberFeedContentPadding(FeedPadding),
+        state = listState,
+    ) {
+        itemsIndexed(items.list, key = { _, item -> item.idHex }) { _, item ->
+            Row(Modifier.fillMaxWidth().animateItem()) {
+                ChannelCardCompose(
+                    baseNote = item,
+                    routeForLastRead = "CommunitiesListFeed",
+                    modifier = Modifier.fillMaxWidth(),
+                    forceEventKind = CommunityDefinitionEvent.KIND,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+            }
+
+            HorizontalDivider(
+                thickness = DividerThickness,
+            )
+        }
+    }
+}
+
+@Composable
+private fun WatchAccountForCommunitiesScreen(
+    feedContentState: FeedContentState,
+    accountViewModel: AccountViewModel,
+) {
+    val listState by accountViewModel.account.liveCommunitiesFollowLists.collectAsStateWithLifecycle()
+    val hiddenUsers =
+        accountViewModel.account.hiddenUsers.flow
+            .collectAsStateWithLifecycle()
+
+    LaunchedEffect(accountViewModel, listState, hiddenUsers) {
+        feedContentState.checkKeysInvalidateDataAndSendToTop()
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/CommunitiesTopBar.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.topbars.FeedFilterSpinner
+import com.vitorpamplona.amethyst.ui.navigation.topbars.UserDrawerSearchTopBar
+import com.vitorpamplona.amethyst.ui.screen.FeedDefinition
+import com.vitorpamplona.amethyst.ui.screen.TopNavFilterState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+
+@Composable
+fun CommunitiesTopBar(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    UserDrawerSearchTopBar(accountViewModel, nav) {
+        val list by accountViewModel.account.settings.defaultCommunitiesFollowList
+            .collectAsStateWithLifecycle()
+
+        CommunitiesTopNavFilterBar(
+            followListsModel = accountViewModel.feedStates.feedListOptions,
+            listName = list,
+            accountViewModel = accountViewModel,
+            onChange = accountViewModel.account.settings::changeDefaultCommunitiesFollowList,
+        )
+    }
+}
+
+@Composable
+private fun CommunitiesTopNavFilterBar(
+    followListsModel: TopNavFilterState,
+    listName: TopFilter,
+    accountViewModel: AccountViewModel,
+    onChange: (FeedDefinition) -> Unit,
+) {
+    val allLists by followListsModel.communityRoutes.collectAsStateWithLifecycle()
+
+    FeedFilterSpinner(
+        placeholderCode = listName,
+        explainer = stringRes(R.string.select_list_to_filter),
+        options = allLists,
+        onSelect = { onChange(allLists.getOrNull(it) ?: followListsModel.allFollows) },
+        accountViewModel = accountViewModel,
+    )
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/NewCommunityButton.kt

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list
+
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Add
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.routes.Route
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size26Modifier
+import com.vitorpamplona.amethyst.ui.theme.Size55Modifier
+
+@Composable
+fun NewCommunityButton(nav: INav) {
+    FloatingActionButton(
+        onClick = { nav.nav(Route.NewCommunity) },
+        modifier = Size55Modifier,
+        shape = CircleShape,
+        containerColor = MaterialTheme.colorScheme.primary,
+    ) {
+        Icon(
+            imageVector = Icons.Outlined.Add,
+            contentDescription = stringRes(id = R.string.new_community),
+            modifier = Size26Modifier,
+            tint = Color.White,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/dal/CommunitiesFeedFilter.kt

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.model.filterIntoSet
+import com.vitorpamplona.amethyst.model.mapNotNullIntoSet
+import com.vitorpamplona.amethyst.ui.dal.FilterByListParams
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip72Communities.DiscoverCommunityFeedFilter
+import com.vitorpamplona.quartz.nip01Core.core.Address
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip72ModCommunities.approval.CommunityPostApprovalEvent
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
+
+class CommunitiesFeedFilter(
+    account: Account,
+) : DiscoverCommunityFeedFilter(account) {
+    override fun feedKey(): String = account.userProfile().pubkeyHex + "-communities-" + followList().code
+
+    override fun followList(): TopFilter = account.settings.defaultCommunitiesFollowList.value
+
+    private fun myPubkey(): String = account.userProfile().pubkeyHex
+
+    override fun feed(): List<Note> {
+        if (followList() == TopFilter.Mine) {
+            val me = myPubkey()
+            val notes =
+                LocalCache.addressables.filterIntoSet(CommunityDefinitionEvent.KIND) { _, note ->
+                    val noteEvent = note.event
+                    noteEvent is CommunityDefinitionEvent && noteEvent.pubKey == me
+                }
+            return sort(notes)
+        }
+
+        val filterParams =
+            FilterByListParams.create(
+                followLists = account.liveCommunitiesFollowLists.value,
+                hiddenUsers = account.hiddenUsers.flow.value,
+            )
+
+        val notes =
+            LocalCache.addressables.mapNotNullIntoSet(CommunityDefinitionEvent.KIND) { key, note ->
+                val noteEvent = note.event
+                if (noteEvent == null && shouldInclude(key, filterParams, note.relays)) {
+                    note
+                } else if (noteEvent is CommunityDefinitionEvent && filterParams.match(noteEvent, note.relays)) {
+                    note
+                } else {
+                    null
+                }
+            }
+
+        return sort(notes)
+    }
+
+    override fun applyFilter(newItems: Set<Note>): Set<Note> = innerApplyFilter(newItems)
+
+    override fun innerApplyFilter(collection: Collection<Note>): Set<Note> {
+        if (followList() == TopFilter.Mine) {
+            val me = myPubkey()
+            return collection
+                .filterTo(HashSet()) {
+                    val noteEvent = it.event
+                    noteEvent is CommunityDefinitionEvent && noteEvent.pubKey == me
+                }
+        }
+
+        val filterParams =
+            FilterByListParams.create(
+                followLists = account.liveCommunitiesFollowLists.value,
+                hiddenUsers = account.hiddenUsers.flow.value,
+            )
+
+        return collection
+            .mapNotNull { note ->
+                val noteEvent = note.event
+                if (noteEvent is CommunityDefinitionEvent && filterParams.match(noteEvent, note.relays)) {
+                    listOf(note)
+                } else if (noteEvent is CommunityPostApprovalEvent) {
+                    noteEvent.communityAddresses().mapNotNull {
+                        val definitionNote = LocalCache.getOrCreateAddressableNote(it)
+                        val definitionEvent = definitionNote.event
+
+                        if (definitionEvent == null && shouldInclude(it, filterParams, definitionNote.relays)) {
+                            definitionNote
+                        } else if (definitionEvent is CommunityDefinitionEvent && filterParams.match(definitionEvent, definitionNote.relays)) {
+                            definitionNote
+                        } else {
+                            null
+                        }
+                    }
+                } else {
+                    null
+                }
+            }.flatten()
+            .toSet()
+    }
+
+    private fun shouldInclude(
+        aTag: Address?,
+        params: FilterByListParams,
+        comingFrom: List<NormalizedRelayUrl> = emptyList(),
+    ) = aTag != null && aTag.kind == CommunityDefinitionEvent.KIND && params.match(aTag, comingFrom)
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/datasource/CommunitiesListFilterAssembler.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource
+
+import androidx.compose.runtime.Stable
+import com.vitorpamplona.amethyst.commons.relayClient.composeSubscriptionManagers.ComposeSubscriptionManager
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountFeedContentStates
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import kotlinx.coroutines.CoroutineScope
+
+class CommunitiesListQueryState(
+    val account: Account,
+    val feedStates: AccountFeedContentStates,
+    val scope: CoroutineScope,
+)
+
+@Stable
+class CommunitiesListFilterAssembler(
+    client: INostrClient,
+) : ComposeSubscriptionManager<CommunitiesListQueryState>() {
+    val group =
+        listOf(
+            CommunitiesListSubAssembler(client, ::allKeys),
+        )
+
+    override fun invalidateKeys() = invalidateFilters()
+
+    override fun invalidateFilters() = group.forEach { it.invalidateFilters() }
+
+    override fun destroy() = group.forEach { it.destroy() }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/datasource/CommunitiesListFilterAssemblerSubscription.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.commons.relayClient.subscriptions.KeyDataSourceSubscription
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+
+@Composable
+fun CommunitiesListFilterAssemblerSubscription(accountViewModel: AccountViewModel) {
+    CommunitiesListFilterAssemblerSubscription(
+        accountViewModel.dataSources().communitiesList,
+        accountViewModel,
+    )
+}
+
+@Composable
+fun CommunitiesListFilterAssemblerSubscription(
+    dataSource: CommunitiesListFilterAssembler,
+    accountViewModel: AccountViewModel,
+) {
+    val state =
+        remember(accountViewModel.account) {
+            CommunitiesListQueryState(accountViewModel.account, accountViewModel.feedStates, accountViewModel.viewModelScope)
+        }
+
+    KeyDataSourceSubscription(state, dataSource)
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/datasource/CommunitiesListSubAssembler.kt

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource
+
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserAndFollowListEoseManager
+import com.vitorpamplona.amethyst.service.relays.SincePerRelayMap
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip72Communities.makeCommunitiesFilter
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import com.vitorpamplona.quartz.nip01Core.relay.client.pool.RelayBasedFilter
+import com.vitorpamplona.quartz.nip01Core.relay.client.subscriptions.Subscription
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.sample
+import kotlinx.coroutines.launch
+
+class CommunitiesListSubAssembler(
+    client: INostrClient,
+    allKeys: () -> Set<CommunitiesListQueryState>,
+) : PerUserAndFollowListEoseManager<CommunitiesListQueryState, TopFilter>(client, allKeys) {
+    override fun updateFilter(
+        key: CommunitiesListQueryState,
+        since: SincePerRelayMap?,
+    ): List<RelayBasedFilter> {
+        val listName = key.listName()
+        val defaultSince = key.feedStates.communitiesList.lastNoteCreatedAtIfFilled()
+
+        return if (listName == TopFilter.Mine) {
+            val outbox = key.account.outboxRelays.flow.value
+            filterCommunitiesMine(key.account.userProfile().pubkeyHex, outbox, since)
+        } else {
+            makeCommunitiesFilter(key.followsPerRelay(), since, defaultSince)
+        }
+    }
+
+    override fun user(key: CommunitiesListQueryState) = key.account.userProfile()
+
+    override fun list(key: CommunitiesListQueryState) = key.listName()
+
+    fun CommunitiesListQueryState.listNameFlow() = account.settings.defaultCommunitiesFollowList
+
+    fun CommunitiesListQueryState.listName() = listNameFlow().value
+
+    fun CommunitiesListQueryState.followsPerRelayFlow() = account.liveCommunitiesFollowListsPerRelay
+
+    fun CommunitiesListQueryState.followsPerRelay() = followsPerRelayFlow().value
+
+    val userJobMap = mutableMapOf<User, List<Job>>()
+
+    @OptIn(FlowPreview::class)
+    override fun newSub(key: CommunitiesListQueryState): Subscription {
+        val user = user(key)
+        userJobMap[user]?.forEach { it.cancel() }
+        userJobMap[user] =
+            listOf(
+                key.scope.launch(Dispatchers.IO) {
+                    key.listNameFlow().collectLatest {
+                        invalidateFilters()
+                    }
+                },
+                key.scope.launch(Dispatchers.IO) {
+                    key.followsPerRelayFlow().sample(500).collectLatest {
+                        invalidateFilters()
+                    }
+                },
+                key.account.scope.launch(Dispatchers.IO) {
+                    key.feedStates.communitiesList.lastNoteCreatedAtWhenFullyLoaded.sample(5000).collectLatest {
+                        invalidateFilters()
+                    }
+                },
+            )
+
+        return super.newSub(key)
+    }
+
+    override fun endSub(
+        key: User,
+        subId: String,
+    ) {
+        super.endSub(key, subId)
+        userJobMap[key]?.forEach { it.cancel() }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/list/datasource/FilterCommunitiesMine.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.list.datasource
+
+import com.vitorpamplona.amethyst.service.relays.SincePerRelayMap
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.relay.client.pool.RelayBasedFilter
+import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
+
+private const val COMMUNITIES_MINE_LIMIT = 300
+
+fun filterCommunitiesMine(
+    pubkey: HexKey,
+    relays: Set<NormalizedRelayUrl>,
+    since: SincePerRelayMap?,
+): List<RelayBasedFilter> {
+    if (relays.isEmpty() || pubkey.isEmpty()) return emptyList()
+    val authors = listOf(pubkey)
+    return relays.map { relay ->
+        RelayBasedFilter(
+            relay = relay,
+            filter =
+                Filter(
+                    kinds = listOf(CommunityDefinitionEvent.KIND),
+                    authors = authors,
+                    limit = COMMUNITIES_MINE_LIMIT,
+                    since = since?.get(relay)?.time,
+                ),
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/newCommunity/NewCommunityModel.kt

@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.newCommunity
+
+import android.content.Context
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.RelayUrlNormalizer
+import com.vitorpamplona.quartz.nip01Core.signers.SignerExceptions
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.ModeratorTag
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.RelayTag
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlin.uuid.ExperimentalUuidApi
+import kotlin.uuid.Uuid
+
+@Stable
+class NewCommunityModel : ViewModel() {
+    var account: Account? = null
+
+    var isPublishing by mutableStateOf(false)
+
+    var name by mutableStateOf("")
+    var description by mutableStateOf("")
+    var imageUrl by mutableStateOf("")
+    var rules by mutableStateOf("")
+    var moderatorsText by mutableStateOf("")
+    var relayRequestsUrl by mutableStateOf("")
+    var relayApprovalsUrl by mutableStateOf("")
+
+    fun init(account: Account) {
+        if (this.account == account) return
+        this.account = account
+    }
+
+    fun canPost(): Boolean =
+        !isPublishing &&
+            name.isNotBlank() &&
+            description.isNotBlank()
+
+    @OptIn(ExperimentalUuidApi::class)
+    fun publish(
+        context: Context,
+        onSuccess: () -> Unit,
+        onError: (String, String) -> Unit,
+    ) = try {
+        publishUnsafe(context, onSuccess, onError)
+    } catch (e: SignerExceptions.ReadOnlyException) {
+        onError(
+            stringRes(context, R.string.read_only_user),
+            stringRes(context, R.string.login_with_a_private_key_to_be_able_to_sign_events),
+        )
+    }
+
+    @OptIn(ExperimentalUuidApi::class)
+    private fun publishUnsafe(
+        context: Context,
+        onSuccess: () -> Unit,
+        onError: (String, String) -> Unit,
+    ) {
+        val myAccount = account ?: return
+
+        viewModelScope.launch(Dispatchers.IO) {
+            isPublishing = true
+            try {
+                val moderatorTags = parseModeratorTags(myAccount)
+                val relayTags = parseRelayTags()
+
+                val definition =
+                    myAccount.sendCommunityDefinition(
+                        name = name.trim(),
+                        description = description.trim(),
+                        moderators = moderatorTags,
+                        image = imageUrl.trim().ifBlank { null },
+                        rules = rules.trim().ifBlank { null },
+                        relays = relayTags.ifEmpty { null },
+                        dTag = Uuid.random().toString(),
+                    )
+
+                if (definition == null) {
+                    onError(
+                        stringRes(context, R.string.read_only_user),
+                        stringRes(context, R.string.login_with_a_private_key_to_be_able_to_sign_events),
+                    )
+                    return@launch
+                }
+
+                // Also follow the community so it appears on the user's list.
+                val communityNote = myAccount.cache.getOrCreateAddressableNote(definition.address())
+                myAccount.follow(communityNote)
+
+                reset()
+                onSuccess()
+            } finally {
+                isPublishing = false
+            }
+        }
+    }
+
+    private fun parseModeratorTags(account: Account): List<ModeratorTag> {
+        val hexes =
+            moderatorsText
+                .lineSequence()
+                .map { it.trim() }
+                .filter { it.length == 64 && it.all { ch -> ch.isDigit() || (ch in 'a'..'f') || (ch in 'A'..'F') } }
+                .map { it.lowercase() }
+                .toSet()
+
+        val withOwner = hexes + account.signer.pubKey
+
+        return withOwner.map { ModeratorTag(it, null, "moderator") }
+    }
+
+    private fun parseRelayTags(): List<RelayTag> {
+        val tags = mutableListOf<RelayTag>()
+        relayRequestsUrl.trim().takeIf { it.isNotEmpty() }?.let {
+            RelayUrlNormalizer.normalizeOrNull(it)?.let { url ->
+                tags += RelayTag(url, RelayTag.MARKER_REQUESTS)
+            }
+        }
+        relayApprovalsUrl.trim().takeIf { it.isNotEmpty() }?.let {
+            RelayUrlNormalizer.normalizeOrNull(it)?.let { url ->
+                tags += RelayTag(url, RelayTag.MARKER_APPROVALS)
+            }
+        }
+        return tags
+    }
+
+    fun reset() {
+        name = ""
+        description = ""
+        imageUrl = ""
+        rules = ""
+        moderatorsText = ""
+        relayRequestsUrl = ""
+        relayApprovalsUrl = ""
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/communities/newCommunity/NewCommunityScreen.kt

@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.communities.newCommunity
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.topbars.TopBarWithBackButton
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun NewCommunityScreen(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val model: NewCommunityModel = viewModel()
+
+    LaunchedEffect(accountViewModel.account) {
+        model.init(accountViewModel.account)
+    }
+
+    val context = LocalContext.current
+    var errorTitle by remember { mutableStateOf<String?>(null) }
+    var errorBody by remember { mutableStateOf<String?>(null) }
+
+    Scaffold(
+        topBar = {
+            TopBarWithBackButton(
+                caption = stringRes(R.string.new_community),
+                popBack = { nav.popBack() },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .padding(padding)
+                    .padding(horizontal = 16.dp, vertical = 12.dp)
+                    .verticalScroll(rememberScrollState()),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            OutlinedTextField(
+                value = model.name,
+                onValueChange = { model.name = it },
+                label = { Text(stringRes(R.string.new_community_name)) },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.description,
+                onValueChange = { model.description = it },
+                label = { Text(stringRes(R.string.new_community_description)) },
+                minLines = 3,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.imageUrl,
+                onValueChange = { model.imageUrl = it },
+                label = { Text(stringRes(R.string.new_community_image_url)) },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.rules,
+                onValueChange = { model.rules = it },
+                label = { Text(stringRes(R.string.new_community_rules)) },
+                minLines = 3,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.moderatorsText,
+                onValueChange = { model.moderatorsText = it },
+                label = { Text(stringRes(R.string.new_community_moderators)) },
+                minLines = 2,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.relayRequestsUrl,
+                onValueChange = { model.relayRequestsUrl = it },
+                label = { Text(stringRes(R.string.new_community_relay_requests)) },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            OutlinedTextField(
+                value = model.relayApprovalsUrl,
+                onValueChange = { model.relayApprovalsUrl = it },
+                label = { Text(stringRes(R.string.new_community_relay_approvals)) },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            errorTitle?.let { title ->
+                Text(
+                    text = title,
+                    fontWeight = FontWeight.Bold,
+                )
+                errorBody?.let { body ->
+                    Text(text = body)
+                }
+            }
+
+            Button(
+                onClick = {
+                    errorTitle = null
+                    errorBody = null
+                    model.publish(
+                        context = context,
+                        onSuccess = { nav.popBack() },
+                        onError = { title, body ->
+                            errorTitle = title
+                            errorBody = body
+                        },
+                    )
+                },
+                enabled = model.canPost(),
+                contentPadding = PaddingValues(horizontal = 24.dp, vertical = 10.dp),
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(text = stringRes(R.string.new_community_publish))
+            }
+        }
+    }
+}

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

@@ -420,6 +420,17 @@
     <string name="open_polls">Open</string>
     <string name="closed_polls">Closed</string>
     <string name="badges">Badges</string>
+    <string name="communities">Communities</string>
+    <string name="new_community">New Community</string>
+    <string name="new_community_name">Community name</string>
+    <string name="new_community_description">Description</string>
+    <string name="new_community_image_url">Cover image URL (optional)</string>
+    <string name="new_community_rules">Rules (optional)</string>
+    <string name="new_community_moderators">Moderators (one pubkey per line, optional)</string>
+    <string name="new_community_relay_requests">Relay for requests (optional)</string>
+    <string name="new_community_relay_approvals">Relay for approvals (optional)</string>
+    <string name="new_community_publish">Publish</string>
+    <string name="new_community_empty">No communities match this filter.</string>
     <string name="received_badges">Received</string>
     <string name="my_badges">Mine</string>
     <string name="awarded_badges">Awarded</string>

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip72ModCommunities/approval/TagArrayBuilderExt.kt

@@ -26,6 +26,7 @@ import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
 import com.vitorpamplona.quartz.nip01Core.hints.EventHintBundle
 import com.vitorpamplona.quartz.nip01Core.tags.aTag.toATag
 import com.vitorpamplona.quartz.nip01Core.tags.events.toETagArray
+import com.vitorpamplona.quartz.nip01Core.tags.people.PTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
 
 fun TagArrayBuilder<CommunityPostApprovalEvent>.community(event: EventHintBundle<CommunityDefinitionEvent>) = add(event.toATag().toATagArray())
@@ -37,6 +38,4 @@ fun TagArrayBuilder<CommunityPostApprovalEvent>.approved(event: EventHintBundle<
     }
 }
 
-fun TagArrayBuilder<CommunityPostApprovalEvent>.notifyAuthor(event: EventHintBundle<Event>) {
+fun TagArrayBuilder<CommunityPostApprovalEvent>.notifyAuthor(event: EventHintBundle<Event>) = add(PTag.assemble(event.event.pubKey, event.authorHomeRelay))
-    add(event.toETagArray())
-}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip72ModCommunities/definition/TagArrayBuilderExt.kt

@@ -21,18 +21,22 @@
 package com.vitorpamplona.quartz.nip72ModCommunities.definition
 
 import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
-import com.vitorpamplona.quartz.nip23LongContent.tags.ImageTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.DescriptionTag
+import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.ImageTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.ModeratorTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.NameTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.RelayTag
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.tags.RulesTag
+import com.vitorpamplona.quartz.nip94FileMetadata.tags.DimensionTag
 
 fun TagArrayBuilder<CommunityDefinitionEvent>.name(name: String) = addUnique(NameTag.assemble(name))
 
 fun TagArrayBuilder<CommunityDefinitionEvent>.description(description: String) = addUnique(DescriptionTag.assemble(description))
 
-fun TagArrayBuilder<CommunityDefinitionEvent>.image(webUrl: String) = addUnique(ImageTag.assemble(webUrl))
+fun TagArrayBuilder<CommunityDefinitionEvent>.image(
+    webUrl: String,
+    dimensions: DimensionTag? = null,
+) = addUnique(ImageTag.assemble(webUrl, dimensions))
 
 fun TagArrayBuilder<CommunityDefinitionEvent>.rules(rules: String) = addUnique(RulesTag.assemble(rules))
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip72ModCommunities/definition/tags/RelayTag.kt

@@ -35,6 +35,10 @@ class RelayTag(
     companion object {
         const val TAG_NAME = "relay"
 
+        const val MARKER_AUTHOR = "author"
+        const val MARKER_REQUESTS = "requests"
+        const val MARKER_APPROVALS = "approvals"
+
         fun parse(tag: Array<String>): RelayTag? {
             ensure(tag.has(1)) { return null }
             ensure(tag[0] == TAG_NAME) { return null }