diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
index 3803c251e3..9e925eab69 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt
@@ -132,7 +132,9 @@ import com.vitorpamplona.amethyst.service.uploads.FileHeader
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.EventProcessor
 import com.vitorpamplona.quartz.concord.cord02Community.ConcordCommunityListEntry
 import com.vitorpamplona.quartz.concord.cord04Roles.ConcordPermissions
+import com.vitorpamplona.quartz.concord.cord04Roles.MetadataEntity
 import com.vitorpamplona.quartz.concord.cord04Roles.RoleEntity
+import com.vitorpamplona.quartz.concord.cord05Invites.CommunityInvite
 import com.vitorpamplona.quartz.experimental.bounties.BountyAddValueEvent
 import com.vitorpamplona.quartz.experimental.edits.TextNoteModificationEvent
 import com.vitorpamplona.quartz.experimental.interactiveStories.InteractiveStoryBaseEvent
@@ -1826,6 +1828,42 @@ class Account(
         return true
     }
 
+    /**
+     * Replace the community metadata (name / icon / description / relays) with a new
+     * Control-Plane edition. Honored on fold only when this account holds
+     * MANAGE_METADATA (or is the owner); dropped otherwise, like every other edition.
+     */
+    suspend fun editConcordMetadata(
+        communityId: String,
+        name: String,
+        description: String?,
+        icon: String?,
+        relays: List<String>,
+    ): Boolean {
+        val session = concordSessions.sessionFor(communityId) ?: return false
+        if (!isWriteable()) return false
+        val metadata = MetadataEntity(name = name, icon = icon, description = description, relays = relays)
+        val wrap = ConcordModeration.editMetadata(signer, session.controlPlaneKey(), communityId.hexToByteArray(), metadata, session.controlEditions(), TimeUtils.now())
+        publishConcordWrap(session.entry, wrap)
+        return true
+    }
+
+    /**
+     * Read-only preview of an invite link: parse it, fetch the kind-33301 bundle from
+     * the link's relays (+ our outbox), and unlock it with the fragment token — WITHOUT
+     * joining. Returns the [CommunityInvite] (name, relays, community coordinates) so a
+     * card can show what the link opens, or null if the link is invalid/unreadable.
+     */
+    suspend fun peekConcordInvite(url: String): CommunityInvite? {
+        val parsed = ConcordActions.parseInviteLink(url) ?: return null
+        val relays =
+            (parsed.fragment.relays.mapNotNull { RelayUrlNormalizer.normalizeOrNull(it) } + outboxRelays.flow.value).toSet()
+        if (relays.isEmpty()) return null
+        val filters = relays.associateWith { listOf(ConcordActions.bundleFilter(parsed.linkSignerPubKey)) }
+        val wraps = client.fetchAll(filters = filters)
+        return wraps.firstNotNullOfOrNull { ConcordActions.openBundle(it, parsed.fragment.token) }
+    }
+
     // ── NIP-29 relay-group actions ───────────────────────────────────────────
     // All group commands are published ONLY to the group's host relay, where
     // relay29 authorizes them. The relay is the source of truth; the kind-10009
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt
index f9fc50973c..d58c8ad814 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt
@@ -103,8 +103,10 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.privateDM.send.NewGro
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordChannelListScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordChannelScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordCreateScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordEditScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordHomeScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordInviteScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.ConcordMembersScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.ephemChat.EphemeralChatScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.ephemChat.metadata.NewEphemeralChatScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.nip28PublicChat.PublicChatChannelScreen
@@ -608,6 +610,22 @@ fun BuildNavigation(
             )
         }
 
+        composableFromEndArgs<Route.ConcordMembers> {
+            ConcordMembersScreen(
+                communityId = it.communityId,
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
+
+        composableFromEndArgs<Route.ConcordEdit> {
+            ConcordEditScreen(
+                communityId = it.communityId,
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
+
         composableFromEndArgs<Route.ConcordInvite> {
             ConcordInviteScreen(
                 link = it.link,
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt
index 89b424cc7d..b4ab7953bc 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt
@@ -690,6 +690,14 @@ sealed class Route {
         val communityId: String,
     ) : Route()
 
+    @Serializable data class ConcordMembers(
+        val communityId: String,
+    ) : Route()
+
+    @Serializable data class ConcordEdit(
+        val communityId: String,
+    ) : Route()
+
     @Serializable object ConcordCreate : Route()
 
     // Deep-link target for a Concord invite link (naddr#fragment). Opens the join flow.
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt
index aaa2558356..23f5b595d6 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt
@@ -584,6 +584,24 @@ class AccountViewModel(
         }
     }
 
+    /** Promote/demote [member] as an Admin of [communityId] (from the Members roster; owner only takes effect). */
+    fun setConcordAdmin(
+        communityId: String,
+        member: HexKey,
+        makeAdmin: Boolean,
+    ) = launchSigner {
+        if (makeAdmin) account.makeConcordAdmin(communityId, member) else account.removeConcordAdmin(communityId, member)
+    }
+
+    /** Ban/unban [member] from [communityId] (from the Members roster). */
+    fun setConcordBan(
+        communityId: String,
+        member: HexKey,
+        ban: Boolean,
+    ) = launchSigner {
+        if (ban) account.banConcordMember(communityId, member) else account.unbanConcordMember(communityId, member)
+    }
+
     @Immutable
     data class NoteComposeReportState(
         val isPostHidden: Boolean = false,
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordChannelListScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordChannelListScreen.kt
index 5fc7ff6aff..d75ce8185a 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordChannelListScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordChannelListScreen.kt
@@ -63,6 +63,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concord.datasource.ConcordChannelSubscription
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.qrcode.QrCodeDrawer
 import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.concord.cord04Roles.ConcordPermissions
 import kotlinx.coroutines.launch
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon as SymbolIcon
 
@@ -103,6 +104,20 @@ fun ConcordChannelListScreen(
                     }
                 },
                 actions = {
+                    val canEdit =
+                        state?.authority?.let {
+                            it.isOwner(account.signer.pubKey) ||
+                                it.effectivePermissions(account.signer.pubKey).has(ConcordPermissions.MANAGE_METADATA)
+                        } == true
+
+                    IconButton(onClick = { nav.nav(Route.ConcordMembers(communityId)) }) {
+                        SymbolIcon(symbol = MaterialSymbols.Group, contentDescription = stringRes(com.vitorpamplona.amethyst.R.string.concord_members_title))
+                    }
+                    if (canEdit) {
+                        IconButton(onClick = { nav.nav(Route.ConcordEdit(communityId)) }) {
+                            SymbolIcon(symbol = MaterialSymbols.Edit, contentDescription = stringRes(com.vitorpamplona.amethyst.R.string.concord_edit_title))
+                        }
+                    }
                     IconButton(
                         enabled = !minting,
                         onClick = {
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordCreateScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordCreateScreen.kt
index 621e692d9e..d8c680f857 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordCreateScreen.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordCreateScreen.kt
@@ -32,9 +32,7 @@ import androidx.compose.material3.Button
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
@@ -70,9 +68,9 @@ fun ConcordCreateScreen(
     accountViewModel: AccountViewModel,
     nav: INav,
 ) {
-    var name by remember { mutableStateOf("") }
-    var about by remember { mutableStateOf("") }
-    var iconUrl by remember { mutableStateOf("") }
+    val name = remember { mutableStateOf("") }
+    val about = remember { mutableStateOf("") }
+    val iconUrl = remember { mutableStateOf("") }
     val relays = remember { mutableListOf<NormalizedRelayUrl>().toMutableStateList() }
     var working by remember { mutableStateOf(false) }
     val scope = rememberCoroutineScope()
@@ -96,31 +94,20 @@ fun ConcordCreateScreen(
                     .padding(padding)
                     .padding(16.dp)
                     .verticalScroll(rememberScrollState()),
-            verticalArrangement = Arrangement.spacedBy(12.dp),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
         ) {
-            OutlinedTextField(
-                value = name,
-                onValueChange = { name = it },
-                modifier = Modifier.fillMaxWidth(),
-                singleLine = true,
-                label = { Text(stringRes(com.vitorpamplona.amethyst.R.string.concord_create_name)) },
-            )
-            OutlinedTextField(
-                value = about,
-                onValueChange = { about = it },
-                modifier = Modifier.fillMaxWidth(),
-                label = { Text(stringRes(com.vitorpamplona.amethyst.R.string.concord_create_about)) },
-            )
-            OutlinedTextField(
-                value = iconUrl,
-                onValueChange = { iconUrl = it },
-                modifier = Modifier.fillMaxWidth(),
-                singleLine = true,
-                label = { Text(stringRes(com.vitorpamplona.amethyst.R.string.concord_create_icon)) },
-                placeholder = { Text("https://…/icon.png") },
+            ConcordMetadataFields(
+                name = name,
+                about = about,
+                iconUrl = iconUrl,
+                robotSeed = "concord-new",
+                accountViewModel = accountViewModel,
             )
 
-            SectionHeader(stringRes(com.vitorpamplona.amethyst.R.string.concord_create_relays))
+            ConcordSectionHeader(
+                title = stringRes(com.vitorpamplona.amethyst.R.string.concord_create_relays),
+                description = stringRes(com.vitorpamplona.amethyst.R.string.concord_create_relays_desc),
+            )
             relays.forEach { relay ->
                 Row(Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
                     Text(relay.displayUrl(), Modifier.weight(1f), style = MaterialTheme.typography.bodyMedium)
@@ -138,21 +125,21 @@ fun ConcordCreateScreen(
 
             Button(
                 onClick = {
-                    if (name.isBlank() || working) return@Button
+                    if (name.value.isBlank() || working) return@Button
                     working = true
                     scope.launch {
                         val communityId =
                             accountViewModel.account.createConcordCommunity(
-                                name = name.trim(),
-                                description = about.trim().ifBlank { null },
+                                name = name.value.trim(),
+                                description = about.value.trim().ifBlank { null },
                                 relays = relays.map { it.url },
-                                icon = iconUrl.trim().ifBlank { null },
+                                icon = iconUrl.value.trim().ifBlank { null },
                             )
                         working = false
                         if (communityId != null) nav.newStack(Route.ConcordServer(communityId))
                     }
                 },
-                enabled = name.isNotBlank() && !working,
+                enabled = name.value.isNotBlank() && !working,
                 modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
             ) {
                 Text(stringRes(com.vitorpamplona.amethyst.R.string.concord_create_action))
@@ -161,15 +148,25 @@ fun ConcordCreateScreen(
     }
 }
 
+/** A section header (title + one-line description) matching the NIP-29 metadata form. */
 @Composable
-private fun SectionHeader(text: String) {
-    Surface(color = MaterialTheme.colorScheme.surface) {
+fun ConcordSectionHeader(
+    title: String,
+    description: String? = null,
+) {
+    Column(Modifier.fillMaxWidth().padding(top = 4.dp)) {
         Text(
-            text = text,
-            style = MaterialTheme.typography.labelLarge,
+            text = title,
+            style = MaterialTheme.typography.titleSmall,
             color = MaterialTheme.colorScheme.primary,
             fontWeight = FontWeight.SemiBold,
-            modifier = Modifier.padding(top = 8.dp),
         )
+        description?.let {
+            Text(
+                text = it,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
     }
 }
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordEditScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordEditScreen.kt
new file mode 100644
index 0000000000..3fe74570ab
--- /dev/null
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordEditScreen.kt
@@ -0,0 +1,153 @@
+/*
+ * 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.chats.publicChannels.concord
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+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.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+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.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import com.vitorpamplona.amethyst.commons.icons.symbols.Icon as SymbolIcon
+
+/**
+ * Edit a Concord community's metadata (name / description / icon). Reuses the shared
+ * [ConcordMetadataFields] hero + fields, prefilled from the folded Control Plane, and
+ * saves a new metadata edition via [com.vitorpamplona.amethyst.model.Account.editConcordMetadata]
+ * — honored on fold only when this account holds MANAGE_METADATA (or is the owner).
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ConcordEditScreen(
+    communityId: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val account = accountViewModel.account
+    val session = remember(account, communityId) { account.concordSessions.sessionFor(communityId) }
+    val state by (session?.state ?: remember { MutableStateFlow(null) }).collectAsStateWithLifecycle()
+
+    val name = remember { mutableStateOf("") }
+    val about = remember { mutableStateOf("") }
+    val iconUrl = remember { mutableStateOf("") }
+    var prefilled by remember { mutableStateOf(false) }
+    var working by remember { mutableStateOf(false) }
+    val scope = rememberCoroutineScope()
+
+    // Seed the fields once, the first time the folded metadata is available.
+    LaunchedEffect(state?.metadata) {
+        val md = state?.metadata
+        if (!prefilled && md != null) {
+            name.value = md.name
+            about.value = md.description.orEmpty()
+            iconUrl.value = md.icon.orEmpty()
+            prefilled = true
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringRes(R.string.concord_edit_title), fontWeight = FontWeight.Bold, maxLines = 1) },
+                navigationIcon = {
+                    IconButton(onClick = { nav.popBack() }) {
+                        SymbolIcon(symbol = MaterialSymbols.AutoMirrored.ArrowBack, contentDescription = stringRes(R.string.back))
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        if (session == null) {
+            Box(Modifier.fillMaxSize().padding(padding), contentAlignment = Alignment.Center) {
+                CircularProgressIndicator()
+            }
+            return@Scaffold
+        }
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .padding(padding)
+                    .padding(16.dp)
+                    .verticalScroll(rememberScrollState()),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
+        ) {
+            ConcordMetadataFields(
+                name = name,
+                about = about,
+                iconUrl = iconUrl,
+                robotSeed = communityId,
+                accountViewModel = accountViewModel,
+            )
+
+            Button(
+                onClick = {
+                    if (name.value.isBlank() || working) return@Button
+                    working = true
+                    scope.launch {
+                        val ok =
+                            account.editConcordMetadata(
+                                communityId = communityId,
+                                name = name.value.trim(),
+                                description = about.value.trim().ifBlank { null },
+                                icon = iconUrl.value.trim().ifBlank { null },
+                                relays = state?.metadata?.relays ?: session.entry.relays,
+                            )
+                        working = false
+                        if (ok) nav.popBack()
+                    }
+                },
+                enabled = name.value.isNotBlank() && !working,
+                modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+            ) {
+                Text(stringRes(R.string.concord_edit_save))
+            }
+        }
+    }
+}
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMembersScreen.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMembersScreen.kt
new file mode 100644
index 0000000000..5ff00e5e4c
--- /dev/null
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMembersScreen.kt
@@ -0,0 +1,246 @@
+/*
+ * 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.chats.publicChannels.concord
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+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.shape.RoundedCornerShape
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
+import com.vitorpamplona.amethyst.commons.model.concord.ConcordMembership
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.note.UserPicture
+import com.vitorpamplona.amethyst.ui.note.UsernameDisplay
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size35dp
+import com.vitorpamplona.quartz.concord.cord04Roles.ConcordPermissions
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import kotlinx.coroutines.flow.MutableStateFlow
+import com.vitorpamplona.amethyst.commons.icons.symbols.Icon as SymbolIcon
+
+/**
+ * The members roster of one Concord community — the analog of NIP-29's
+ * `RelayGroupMembersScreen`. Concord has no relay-signed roster (membership is key
+ * possession), so this shows the *privileged* roster derivable from the folded
+ * Control Plane: the owner, every role-holder (admins/moderators), and banned
+ * users. The overflow menu offers promote/demote (owner) and ban/unban, gated on
+ * the viewer's authority exactly as the write path enforces on fold.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ConcordMembersScreen(
+    communityId: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val account = accountViewModel.account
+    val session = remember(account, communityId) { account.concordSessions.sessionFor(communityId) }
+    val state by (session?.state ?: remember { MutableStateFlow(null) }).collectAsStateWithLifecycle()
+
+    val myPubKey = account.signer.pubKey
+    val roster =
+        remember(state) {
+            val s = state ?: return@remember emptyList<RosterEntry>()
+            val authority = s.authority
+            val pubkeys = (listOf(s.ownerPubKey) + authority.roleHolders() + authority.bannedMembers()).map { it.lowercase() }.distinct()
+            pubkeys
+                .map { RosterEntry(it, ConcordMembership.of(authority, it)) }
+                .sortedWith(compareBy({ it.membership.sortRank() }, { it.pubkey }))
+        }
+
+    val iAmOwner = state?.authority?.isOwner(myPubKey) == true
+    val iCanBan = state?.let { it.authority.isOwner(myPubKey) || it.authority.effectivePermissions(myPubKey).has(ConcordPermissions.BAN) } == true
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Column {
+                        Text(stringRes(R.string.concord_members_title), fontWeight = FontWeight.Bold, maxLines = 1)
+                        state?.metadata?.name?.takeIf { it.isNotBlank() }?.let {
+                            Text(it, style = MaterialTheme.typography.labelSmall, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                        }
+                    }
+                },
+                navigationIcon = {
+                    IconButton(onClick = { nav.popBack() }) {
+                        SymbolIcon(symbol = MaterialSymbols.AutoMirrored.ArrowBack, contentDescription = stringRes(R.string.back))
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        if (roster.isEmpty()) {
+            Box(Modifier.fillMaxSize().padding(padding), contentAlignment = Alignment.Center) {
+                Text(
+                    stringRes(R.string.concord_members_empty),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(horizontal = 32.dp),
+                )
+            }
+        } else {
+            LazyColumn(Modifier.fillMaxSize().padding(padding)) {
+                items(roster, key = { it.pubkey }) { entry ->
+                    ConcordMemberRow(
+                        entry = entry,
+                        communityId = communityId,
+                        isSelf = entry.pubkey.equals(myPubKey, ignoreCase = true),
+                        viewerIsOwner = iAmOwner,
+                        viewerCanBan = iCanBan,
+                        accountViewModel = accountViewModel,
+                        nav = nav,
+                    )
+                    HorizontalDivider(thickness = 0.25.dp, color = MaterialTheme.colorScheme.outlineVariant)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ConcordMemberRow(
+    entry: RosterEntry,
+    communityId: String,
+    isSelf: Boolean,
+    viewerIsOwner: Boolean,
+    viewerCanBan: Boolean,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val user = remember(entry.pubkey) { accountViewModel.checkGetOrCreateUser(entry.pubkey) }
+    val isOwnerTarget = entry.membership == ConcordMembership.OWNER
+    val isBanned = entry.membership == ConcordMembership.BANNED
+    val isAdmin = entry.membership == ConcordMembership.ADMIN
+
+    // Owner can promote/demote anyone but the owner; ban is available to owner + BAN holders,
+    // never against the owner or yourself. A banned user only offers "unban".
+    val canToggleAdmin = viewerIsOwner && !isOwnerTarget && !isBanned && !isSelf
+    val canBan = viewerCanBan && !isOwnerTarget && !isSelf
+    val hasMenu = canToggleAdmin || canBan
+
+    androidx.compose.foundation.layout.Row(
+        modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 10.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        UserPicture(entry.pubkey, Size35dp, accountViewModel = accountViewModel, nav = nav)
+        Column(Modifier.weight(1f)) {
+            if (user != null) {
+                UsernameDisplay(user, accountViewModel = accountViewModel)
+            } else {
+                Text(entry.pubkey.take(8), fontWeight = FontWeight.SemiBold, maxLines = 1, overflow = TextOverflow.Ellipsis)
+            }
+        }
+        MemberBadge(entry.membership)
+        if (hasMenu) {
+            var expanded by remember { mutableStateOf(false) }
+            IconButton(onClick = { expanded = true }) {
+                SymbolIcon(symbol = MaterialSymbols.MoreVert, contentDescription = stringRes(R.string.more_options))
+            }
+            DropdownMenu(expanded = expanded, onDismissRequest = { expanded = false }) {
+                if (canToggleAdmin) {
+                    DropdownMenuItem(
+                        text = { Text(stringRes(if (isAdmin) R.string.concord_members_remove_admin else R.string.concord_members_make_admin)) },
+                        onClick = {
+                            accountViewModel.setConcordAdmin(communityId, entry.pubkey, makeAdmin = !isAdmin)
+                            expanded = false
+                        },
+                    )
+                }
+                if (canBan) {
+                    DropdownMenuItem(
+                        text = { Text(stringRes(if (isBanned) R.string.concord_members_unban else R.string.concord_members_ban)) },
+                        onClick = {
+                            accountViewModel.setConcordBan(communityId, entry.pubkey, ban = !isBanned)
+                            expanded = false
+                        },
+                    )
+                }
+            }
+        }
+    }
+}
+
+/** A small pill labelling the member's standing (owner / admin / banned; plain members render nothing). */
+@Composable
+private fun MemberBadge(membership: ConcordMembership) {
+    val label =
+        when (membership) {
+            ConcordMembership.OWNER -> stringRes(R.string.concord_role_owner)
+            ConcordMembership.ADMIN -> stringRes(R.string.concord_role_admin)
+            ConcordMembership.BANNED -> stringRes(R.string.concord_role_banned)
+            else -> return
+        }
+    val container = if (membership == ConcordMembership.BANNED) MaterialTheme.colorScheme.errorContainer else MaterialTheme.colorScheme.primaryContainer
+    val content = if (membership == ConcordMembership.BANNED) MaterialTheme.colorScheme.onErrorContainer else MaterialTheme.colorScheme.onPrimaryContainer
+    Surface(shape = RoundedCornerShape(6.dp), color = container) {
+        Text(
+            text = label,
+            style = MaterialTheme.typography.labelSmall,
+            color = content,
+            modifier = Modifier.padding(horizontal = 6.dp, vertical = 2.dp),
+        )
+    }
+}
+
+private class RosterEntry(
+    val pubkey: HexKey,
+    val membership: ConcordMembership,
+)
+
+/** Owner first, then admins, then plain members, then banned last. */
+private fun ConcordMembership.sortRank(): Int =
+    when (this) {
+        ConcordMembership.OWNER -> 0
+        ConcordMembership.ADMIN -> 1
+        ConcordMembership.MEMBER -> 2
+        ConcordMembership.NONE -> 3
+        ConcordMembership.BANNED -> 4
+    }
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMetadataForm.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMetadataForm.kt
new file mode 100644
index 0000000000..fb712c7079
--- /dev/null
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordMetadataForm.kt
@@ -0,0 +1,153 @@
+/*
+ * 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.chats.publicChannels.concord
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.components.RobohashFallbackAsyncImage
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+
+/**
+ * The shared metadata form for creating and editing a Concord community — a large
+ * circular icon preview at the top that reflects the icon URL live (tap it to jump
+ * to the URL field), then the name, description, and icon-URL fields. Mirrors the
+ * NIP-29 `GroupImagePicker` hero + `GroupMetadataFields` layout so the two features
+ * feel consistent. Callers own the state and add the surrounding scaffold, relays
+ * section (create only), and the create/save action.
+ */
+@Composable
+fun ConcordMetadataFields(
+    name: MutableState<String>,
+    about: MutableState<String>,
+    iconUrl: MutableState<String>,
+    robotSeed: String,
+    accountViewModel: AccountViewModel,
+    modifier: Modifier = Modifier,
+) {
+    val iconFocus = remember { FocusRequester() }
+
+    Column(
+        modifier = modifier.fillMaxWidth(),
+        verticalArrangement = Arrangement.spacedBy(14.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+    ) {
+        ConcordIconHero(
+            robotSeed = robotSeed,
+            iconUrl = iconUrl.value,
+            displayName = name.value,
+            accountViewModel = accountViewModel,
+            onClick = { iconFocus.requestFocus() },
+        )
+
+        OutlinedTextField(
+            value = name.value,
+            onValueChange = { name.value = it },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true,
+            label = { Text(stringRes(R.string.concord_create_name)) },
+        )
+        OutlinedTextField(
+            value = about.value,
+            onValueChange = { about.value = it },
+            modifier = Modifier.fillMaxWidth(),
+            minLines = 2,
+            maxLines = 5,
+            label = { Text(stringRes(R.string.concord_create_about)) },
+        )
+        OutlinedTextField(
+            value = iconUrl.value,
+            onValueChange = { iconUrl.value = it },
+            modifier = Modifier.fillMaxWidth().focusRequester(iconFocus),
+            singleLine = true,
+            label = { Text(stringRes(R.string.concord_create_icon)) },
+            placeholder = { Text("https://…/icon.png") },
+        )
+    }
+}
+
+/** The circular community-icon hero: shows the icon URL live over a stable robohash placeholder. */
+@Composable
+private fun ConcordIconHero(
+    robotSeed: String,
+    iconUrl: String,
+    displayName: String,
+    accountViewModel: AccountViewModel,
+    onClick: () -> Unit,
+) {
+    val autoPlayGif by accountViewModel.settings.autoPlayVideosFlow.collectAsStateWithLifecycle()
+    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+        Box(
+            modifier =
+                Modifier
+                    .size(104.dp)
+                    .clip(CircleShape)
+                    .clickable(onClick = onClick),
+            contentAlignment = Alignment.Center,
+        ) {
+            RobohashFallbackAsyncImage(
+                robot = robotSeed,
+                model = iconUrl.ifBlank { null },
+                contentDescription = displayName.ifBlank { stringRes(R.string.concord_create_title) },
+                modifier = Modifier.size(104.dp).clip(CircleShape),
+                loadProfilePicture = accountViewModel.settings.showProfilePictures(),
+                loadRobohash = accountViewModel.settings.isNotPerformanceMode(),
+                autoPlayGif = autoPlayGif,
+            )
+        }
+        Text(
+            text = stringRes(R.string.concord_create_icon_hint),
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.primary,
+            fontWeight = FontWeight.Medium,
+            textAlign = TextAlign.Center,
+            modifier =
+                Modifier
+                    .padding(top = 8.dp)
+                    .clip(CircleShape)
+                    .clickable(onClick = onClick)
+                    .padding(horizontal = 8.dp, vertical = 4.dp),
+        )
+    }
+}
diff --git a/amethyst/src/main/res/values/strings.xml b/amethyst/src/main/res/values/strings.xml
index d3b7d8eda3..38613b8987 100644
--- a/amethyst/src/main/res/values/strings.xml
+++ b/amethyst/src/main/res/values/strings.xml
@@ -327,6 +327,21 @@
     <string name="concord_ban_user">Ban</string>
     <string name="concord_ban_user_title">Ban from this community?</string>
     <string name="concord_ban_user_body">This member will be added to the community banlist. Their messages will be hidden and their future posts dropped by every member. You can unban them later.</string>
+    <string name="concord_create_icon_hint">Set a community icon</string>
+    <string name="concord_create_relays_desc">Relays that store this community\'s encrypted messages. Leave empty to use your own.</string>
+    <string name="concord_edit_title">Edit community</string>
+    <string name="concord_edit_save">Save</string>
+    <string name="concord_members_title">Members</string>
+    <string name="concord_members_empty">No owner, admins, or banned members to show yet.</string>
+    <string name="concord_members_make_admin">Make admin</string>
+    <string name="concord_members_remove_admin">Remove admin</string>
+    <string name="concord_members_ban">Ban</string>
+    <string name="concord_members_unban">Unban</string>
+    <string name="concord_role_owner">Owner</string>
+    <string name="concord_role_admin">Admin</string>
+    <string name="concord_role_banned">Banned</string>
+    <string name="concord_invite_card_join">Join community</string>
+    <string name="concord_invite_card_subtitle">Concord community invite</string>
     <string name="chats_history_proto_nip17">encrypted</string>
     <string name="chats_history_proto_nip04">legacy</string>
     <string name="chats_reply_searching_history">Looking for the original message…</string>
diff --git a/commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/actions/ConcordModeration.kt b/commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/actions/ConcordModeration.kt
index b576928541..c38f3858a4 100644
--- a/commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/actions/ConcordModeration.kt
+++ b/commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/actions/ConcordModeration.kt
@@ -26,6 +26,7 @@ import com.vitorpamplona.quartz.concord.cord04Roles.ControlEdition
 import com.vitorpamplona.quartz.concord.cord04Roles.ControlEditionBuilder
 import com.vitorpamplona.quartz.concord.cord04Roles.ControlEntityKind
 import com.vitorpamplona.quartz.concord.cord04Roles.GrantEntity
+import com.vitorpamplona.quartz.concord.cord04Roles.MetadataEntity
 import com.vitorpamplona.quartz.concord.cord04Roles.RoleEntity
 import com.vitorpamplona.quartz.concord.crypto.ConcordKeyDerivation
 import com.vitorpamplona.quartz.concord.crypto.GroupKey
@@ -96,6 +97,26 @@ object ConcordModeration {
         return wrap(actor, controlPlane, ControlEntityKind.ROLE, roleId, version, prev, content, createdAt, citation)
     }
 
+    /**
+     * Replaces the community metadata (name / icon / description / relays). The
+     * metadata entity id is the community id itself (as in genesis), so this chains
+     * the next version onto the metadata head. Honored at fold only when [actor]
+     * holds MANAGE_METADATA (or is the owner) tracing to the owner via [citation].
+     */
+    suspend fun editMetadata(
+        actor: NostrSigner,
+        controlPlane: GroupKey,
+        communityId: ByteArray,
+        metadata: MetadataEntity,
+        current: List<ControlEdition>,
+        createdAt: Long,
+        citation: AuthorityCitation? = null,
+    ): Event {
+        val (version, prev) = versioning(current, ControlEntityKind.METADATA, communityId)
+        val content = ConcordJson.instance.encodeToString(MetadataEntity.serializer(), metadata)
+        return wrap(actor, controlPlane, ControlEntityKind.METADATA, communityId, version, prev, content, createdAt, citation)
+    }
+
     /** Grants [member] exactly [roleIds] (replaces their prior grant). Empty list revokes all roles. */
     suspend fun grant(
         actor: NostrSigner,
diff --git a/quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/concord/cord04Roles/AuthorityResolver.kt b/quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/concord/cord04Roles/AuthorityResolver.kt
index e5ed18453d..efefab9211 100644
--- a/quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/concord/cord04Roles/AuthorityResolver.kt
+++ b/quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/concord/cord04Roles/AuthorityResolver.kt
@@ -55,6 +55,17 @@ class AuthorityResolver private constructor(
     /** The role ids a member currently holds (empty for the owner and for plain members). */
     fun rolesOf(pubKey: String): Set<String> = memberRoles[pubKey.lowercase()] ?: emptySet()
 
+    /**
+     * The set of pubkeys that hold at least one validly-granted role (lowercase
+     * hex). This is the *privileged* roster — admins/moderators and any other
+     * role-holders — and excludes the owner and silent key-holding members, since
+     * plain membership is key possession and leaves no Control-Plane trace.
+     */
+    fun roleHolders(): Set<String> = memberRoles.keys
+
+    /** The healed banlist union (lowercase hex). */
+    fun bannedMembers(): Set<String> = banned
+
     /** The member's rank, lower being higher authority; null = no authority. Owner = [OWNER_RANK]. */
     fun rank(pubKey: String): Long? {
         val m = pubKey.lowercase()