Merge pull request #3105 from vitorpamplona/claude/eager-davinci-WxjiM

Add dedicated podcast screen with episode list and inline player

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/wavefront/SyntheticWaveform.kt

@@ -0,0 +1,66 @@
+/*
+ * 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.service.playback.composable.wavefront
+
+import com.vitorpamplona.amethyst.service.playback.composable.WaveformData
+import kotlin.math.sin
+import kotlin.random.Random
+
+private const val SYNTHETIC_WAVEFORM_SAMPLES = 96
+private const val TWO_PI = (Math.PI * 2).toFloat()
+
+/**
+ * Builds a stable, decorative waveform from a [seed] (usually an event id). ExoPlayer drives
+ * actual playback progress — these bars only exist so an audio player has the familiar
+ * "audio silhouette" shape rather than a flat strip when the source carries no `waveform` tag.
+ * Shared by every audio renderer whose spec omits waveforms (music tracks, podcast episodes, …).
+ *
+ * Every shape parameter (phase offset, carrier frequency, baseline, envelope skew, jitter
+ * envelope) is drawn from the seeded RNG before the per-bar loop, so two different seeds
+ * produce visibly different waveforms — earlier versions used a fixed envelope + carrier that
+ * only varied by per-bar noise, which made every track look like the same slow-fade sine with
+ * minor wiggle.
+ */
+fun syntheticWaveformFor(seed: String): WaveformData {
+    // Fold the seed's 32-bit hash into a Long so two ids whose hashCode happens to collide
+    // (rare for hex addresses but cheap to defend against) still differ via the bit shuffle.
+    val rng = Random((seed.hashCode().toLong() * 0x9E3779B97F4A7C15uL.toLong()) xor seed.length.toLong())
+
+    // Shape parameters drawn once per seed — these are what makes seed A look different
+    // from seed B at a glance.
+    val phaseOffset = rng.nextFloat() * TWO_PI
+    val carrierCycles = 2.5f + rng.nextFloat() * 5.5f // 2.5–8 full cycles across the strip
+    val carrierWeight = 0.18f + rng.nextFloat() * 0.18f // 0.18–0.36
+    val baseline = 0.28f + rng.nextFloat() * 0.22f // 0.28–0.50
+    val envelopeStrength = rng.nextFloat() * 0.45f // 0.0–0.45; some fade in/out, others don't
+    val noiseStrength = 0.18f + rng.nextFloat() * 0.22f // 0.18–0.40
+
+    val bars =
+        List(SYNTHETIC_WAVEFORM_SAMPLES) { index ->
+            val phase = index.toFloat() / SYNTHETIC_WAVEFORM_SAMPLES
+            // Optional gentle fade so some taper at the ends, others stay even.
+            val envelope = 1f - envelopeStrength * (1f - sin(phase * Math.PI).toFloat())
+            val carrier = sin(phase * TWO_PI * carrierCycles + phaseOffset) * carrierWeight
+            val noise = (rng.nextFloat() - 0.5f) * 2f * noiseStrength
+            ((baseline + carrier + noise) * envelope).coerceIn(0.05f, 1.0f)
+        }
+    return WaveformData(bars)
+}

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

@@ -56,6 +56,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.nests.datasource.NestRoomFi
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.nests.datasource.NestRoomLivenessAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.nests.datasource.NestsFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures.datasource.PicturesFilterAssembler
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.datasource.OnePodcastFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.datasource.PodcastEpisodesFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.datasource.PodcastsFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.datasource.PollsFilterAssembler
@@ -133,6 +134,7 @@ class RelaySubscriptionsCoordinator(
     val musicPlaylists = MusicPlaylistsFilterAssembler(client)
     val podcastEpisodes = PodcastEpisodesFilterAssembler(client)
     val podcasts = PodcastsFilterAssembler(client)
+    val onePodcast = OnePodcastFilterAssembler(client)
     val softwareApps = SoftwareAppsFilterAssembler(client)
     val badges = BadgesFilterAssembler(client)
     val profileBadges = ProfileBadgesFilterAssembler(client)
@@ -179,6 +181,7 @@ class RelaySubscriptionsCoordinator(
             musicPlaylists,
             podcastEpisodes,
             podcasts,
+            onePodcast,
             softwareApps,
             badges,
             profileBadges,

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

@@ -148,6 +148,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.publicMessage
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures.PicturesScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pinnednotes.PinnedNotesScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.PodcastEpisodesScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.PodcastScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.PodcastsScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.PollPostScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.PollsScreen
@@ -297,6 +298,7 @@ fun BuildNavigation(
         composableFromEnd<Route.MusicPlaylists> { MusicPlaylistsScreen(accountViewModel, nav) }
         composableFromEnd<Route.PodcastEpisodes> { PodcastEpisodesScreen(accountViewModel, nav) }
         composableFromEnd<Route.Podcasts> { PodcastsScreen(accountViewModel, nav) }
+        composableFromEndArgs<Route.Podcast> { PodcastScreen(it.pubkey, accountViewModel, nav) }
         composableFromEndArgs<Route.NewMusicTrack> { NewMusicTrackScreen(editDTag = it.dTag, accountViewModel = accountViewModel, nav = nav) }
         composableFromEndArgs<Route.AddToMusicPlaylist> { AddToMusicPlaylistSheet(trackAddress = it.trackAddress, accountViewModel = accountViewModel, nav = nav) }
         composableFromEnd<Route.NewHlsVideo> { NewHlsVideoScreen(accountViewModel, nav) }

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

@@ -162,6 +162,10 @@ sealed class Route {
 
     @Serializable object Podcasts : Route()
 
+    @Serializable data class Podcast(
+        val pubkey: String,
+    ) : Route()
+
     @Serializable
     data class NewMusicTrack(
         val dTag: String? = null,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/MusicTrack.kt

@@ -62,8 +62,8 @@ import com.vitorpamplona.amethyst.service.playback.composable.GetVideoController
 import com.vitorpamplona.amethyst.service.playback.composable.LoadThumbAndThenVideoView
 import com.vitorpamplona.amethyst.service.playback.composable.PauseControllerWhenInBackground
 import com.vitorpamplona.amethyst.service.playback.composable.VideoView
-import com.vitorpamplona.amethyst.service.playback.composable.WaveformData
 import com.vitorpamplona.amethyst.service.playback.composable.mediaitem.GetMediaItem
+import com.vitorpamplona.amethyst.service.playback.composable.wavefront.syntheticWaveformFor
 import com.vitorpamplona.amethyst.ui.components.LoadNote
 import com.vitorpamplona.amethyst.ui.components.MyAsyncImage
 import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
@@ -438,46 +438,6 @@ private fun TopicChip(
     )
 }
 
-private const val SYNTHETIC_WAVEFORM_SAMPLES = 96
-private const val TWO_PI = (Math.PI * 2).toFloat()
-
-/**
- * Builds a stable, decorative waveform from the track id. ExoPlayer drives actual playback
- * progress — these bars only exist so the audio player has the familiar "music silhouette"
- * shape rather than a flat strip when the spec has no `waveform` tag.
- *
- * Every shape parameter (phase offset, carrier frequency, baseline, envelope skew, jitter
- * envelope) is drawn from the seeded RNG before the per-bar loop, so two different track ids
- * produce visibly different waveforms — earlier versions used a fixed envelope + carrier that
- * only varied by per-bar noise, which made every track look like the same slow-fade sine with
- * minor wiggle.
- */
-private fun syntheticWaveformFor(seed: String): WaveformData {
-    // Fold the seed's 32-bit hash into a Long so two ids whose hashCode happens to collide
-    // (rare for hex addresses but cheap to defend against) still differ via the bit shuffle.
-    val rng = kotlin.random.Random((seed.hashCode().toLong() * 0x9E3779B97F4A7C15uL.toLong()) xor seed.length.toLong())
-
-    // Shape parameters drawn once per track — these are what makes track A look different
-    // from track B at a glance.
-    val phaseOffset = rng.nextFloat() * TWO_PI
-    val carrierCycles = 2.5f + rng.nextFloat() * 5.5f // 2.5–8 full cycles across the strip
-    val carrierWeight = 0.18f + rng.nextFloat() * 0.18f // 0.18–0.36
-    val baseline = 0.28f + rng.nextFloat() * 0.22f // 0.28–0.50
-    val envelopeStrength = rng.nextFloat() * 0.45f // 0.0–0.45; some tracks fade in/out, others don't
-    val noiseStrength = 0.18f + rng.nextFloat() * 0.22f // 0.18–0.40
-
-    val bars =
-        List(SYNTHETIC_WAVEFORM_SAMPLES) { index ->
-            val phase = index.toFloat() / SYNTHETIC_WAVEFORM_SAMPLES
-            // Optional gentle fade so some tracks taper at the ends, others stay even.
-            val envelope = 1f - envelopeStrength * (1f - kotlin.math.sin(phase * Math.PI).toFloat())
-            val carrier = kotlin.math.sin(phase * TWO_PI * carrierCycles + phaseOffset) * carrierWeight
-            val noise = (rng.nextFloat() - 0.5f) * 2f * noiseStrength
-            ((baseline + carrier + noise) * envelope).coerceIn(0.05f, 1.0f)
-        }
-    return WaveformData(bars)
-}
-
 // ---------------------------------------------------------------------------
 // @Preview composables. These wire a constructed MusicTrackEvent through
 // LocalCache so the renderer pulls the real Note path it would in production.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PodcastEpisode.kt

@@ -22,10 +22,8 @@ package com.vitorpamplona.amethyst.ui.note.types
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.MaterialTheme
@@ -33,7 +31,6 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.MutableState
 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.graphics.Color
@@ -42,10 +39,6 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.model.toImmutableListOfLists
 import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.service.playback.composable.GetVideoController
-import com.vitorpamplona.amethyst.service.playback.composable.PauseControllerWhenInBackground
-import com.vitorpamplona.amethyst.service.playback.composable.WaveformData
-import com.vitorpamplona.amethyst.service.playback.composable.mediaitem.GetMediaItem
 import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -53,12 +46,6 @@ import com.vitorpamplona.amethyst.ui.theme.Size5dp
 import com.vitorpamplona.amethyst.ui.theme.replyModifier
 import com.vitorpamplona.quartz.nipF4Podcasts.episode.PodcastEpisodeEvent
 
-// NIP-F4 doesn't carry a waveform tag, so every episode renders with the same flat baseline.
-// Hoist to a top-level constant so we share one List<Float>+WaveformData across the whole
-// feed instead of allocating a fresh 96-element list per visible card.
-private const val WAVEFORM_SAMPLES = 96
-private val FLAT_WAVEFORM = WaveformData(List(WAVEFORM_SAMPLES) { 0.4f })
-
 // Bottom-rounded border on the audio player so it visually butts up against the cover's
 // top-rounded corners as one card. Constant — keep out of recomposition.
 private val PLAYER_BORDER_MODIFIER =
@@ -88,39 +75,14 @@ fun RenderPodcastEpisode(
     Column(MaterialTheme.colorScheme.replyModifier) {
         PodcastCoverCard(image, note, accountViewModel)
         firstAudio?.let { audio ->
-            val callbackUri = remember(noteEvent) { note.toNostrUri() }
-
-            Row(
-                Modifier.fillMaxWidth().height(80.dp),
-                verticalAlignment = Alignment.CenterVertically,
-            ) {
-                GetMediaItem(
-                    videoUri = audio.url,
-                    title = title,
-                    artworkUri = image,
-                    authorName = note.author?.toBestDisplayName(),
-                    callbackUri = callbackUri,
-                    mimeType = audio.mediaType,
-                    aspectRatio = null,
-                    proxyPort = accountViewModel.httpClientBuilder.proxyPortForVideo(audio.url),
-                    keepPlaying = false,
-                    waveformData = FLAT_WAVEFORM,
-                ) { mediaItem ->
-                    GetVideoController(
-                        mediaItem = mediaItem,
-                        muted = false,
-                    ) { controller ->
-                        PauseControllerWhenInBackground(controller)
-                        RenderVoicePlayer(
-                            mediaItem = mediaItem,
-                            controllerState = controller,
-                            waveform = FLAT_WAVEFORM,
-                            borderModifier = PLAYER_BORDER_MODIFIER,
-                            accountViewModel = accountViewModel,
-                        )
-                    }
-                }
-            }
+            PodcastEpisodeAudioPlayer(
+                audio = audio,
+                note = note,
+                title = title,
+                image = image,
+                borderModifier = PLAYER_BORDER_MODIFIER,
+                accountViewModel = accountViewModel,
+            )
         }
 
         Column(
@@ -142,12 +104,18 @@ fun RenderPodcastEpisode(
             }
 
             description?.let {
-                Text(
-                    text = it,
-                    style = MaterialTheme.typography.bodyMedium,
-                    maxLines = 3,
-                    overflow = TextOverflow.Ellipsis,
+                val descriptionTags = remember(noteEvent) { noteEvent.tags.toImmutableListOfLists() }
+
+                TranslatableRichTextViewer(
+                    content = it,
+                    canPreview = canPreview,
+                    quotesLeft = 1,
                     modifier = Modifier.fillMaxWidth(),
+                    tags = descriptionTags,
+                    backgroundColor = backgroundColor,
+                    id = note.idHex + "-description",
+                    accountViewModel = accountViewModel,
+                    nav = nav,
                 )
             }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PodcastEpisodeAudioPlayer.kt

@@ -0,0 +1,103 @@
+/*
+ * 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.note.types
+
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.playback.composable.GetVideoController
+import com.vitorpamplona.amethyst.service.playback.composable.PauseControllerWhenInBackground
+import com.vitorpamplona.amethyst.service.playback.composable.WaveformData
+import com.vitorpamplona.amethyst.service.playback.composable.mediaitem.GetMediaItem
+import com.vitorpamplona.amethyst.service.playback.composable.wavefront.syntheticWaveformFor
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.quartz.nipF4Podcasts.episode.tags.AudioTag
+
+// The voice player's internal controls are laid out for 100.dp; 80.dp is the tightest height
+// that still fits the play button without clipping it. Shared so the feed card and the
+// per-podcast list row stay pixel-identical.
+private val PLAYER_HEIGHT_MODIFIER = Modifier.fillMaxWidth().height(80.dp)
+
+/**
+ * The inline audio strip for a NIP-F4 episode (kind 54): one [AudioTag] played through the
+ * shared media-controller stack. [borderModifier] shapes the strip — bottom-rounded when it
+ * butts up under a cover image, fully rounded when it stands alone in a list.
+ */
+@Composable
+fun PodcastEpisodeAudioPlayer(
+    audio: AudioTag,
+    note: Note,
+    title: String?,
+    image: String?,
+    borderModifier: Modifier,
+    accountViewModel: AccountViewModel,
+) {
+    val callbackUri = remember(note) { note.toNostrUri() }
+    // Use a real waveform when the episode ships one in its IMeta; NIP-F4 usually doesn't, so
+    // fall back to a decorative waveform seeded by the note id — same approach as music tracks,
+    // a per-episode silhouette instead of a flat strip.
+    val waveform =
+        remember(note) {
+            note.event
+                ?.getAudioMetaWithWaveform()
+                ?.waveform
+                ?.let { WaveformData(it) }
+                ?: syntheticWaveformFor(note.idHex)
+        }
+
+    Row(
+        PLAYER_HEIGHT_MODIFIER,
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        GetMediaItem(
+            videoUri = audio.url,
+            title = title,
+            artworkUri = image,
+            authorName = note.author?.toBestDisplayName(),
+            callbackUri = callbackUri,
+            mimeType = audio.mediaType,
+            aspectRatio = null,
+            proxyPort = accountViewModel.httpClientBuilder.proxyPortForVideo(audio.url),
+            keepPlaying = false,
+            waveformData = waveform,
+        ) { mediaItem ->
+            GetVideoController(
+                mediaItem = mediaItem,
+                muted = false,
+            ) { controller ->
+                PauseControllerWhenInBackground(controller)
+                RenderVoicePlayer(
+                    mediaItem = mediaItem,
+                    controllerState = controller,
+                    waveform = waveform,
+                    borderModifier = borderModifier,
+                    accountViewModel = accountViewModel,
+                )
+            }
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PodcastMetadata.kt

@@ -20,25 +20,36 @@
  */
 package com.vitorpamplona.amethyst.ui.note.types
 
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ExperimentalLayoutApi
 import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
+import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
+import com.vitorpamplona.amethyst.commons.model.toImmutableListOfLists
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
 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.stringRes
 import com.vitorpamplona.amethyst.ui.theme.Size5dp
 import com.vitorpamplona.amethyst.ui.theme.grayText
 import com.vitorpamplona.amethyst.ui.theme.replyModifier
@@ -49,10 +60,10 @@ import com.vitorpamplona.quartz.nipF4Podcasts.metadata.PodcastMetadataEvent
 fun RenderPodcastMetadata(
     note: Note,
     makeItShort: Boolean,
-    @Suppress("UNUSED_PARAMETER") canPreview: Boolean,
-    @Suppress("UNUSED_PARAMETER") backgroundColor: MutableState<Color>,
+    canPreview: Boolean,
+    backgroundColor: MutableState<Color>,
     accountViewModel: AccountViewModel,
-    @Suppress("UNUSED_PARAMETER") nav: INav,
+    nav: INav,
 ) {
     val noteEvent = note.event as? PodcastMetadataEvent ?: return
 
@@ -60,8 +71,15 @@ fun RenderPodcastMetadata(
     val image = remember(noteEvent) { noteEvent.image() }
     val description = remember(noteEvent) { noteEvent.description() }
     val websites = remember(noteEvent) { noteEvent.websites() }
+    // Each podcast is its own keypair, so the author pubkey IS the podcast id used to open
+    // its dedicated screen with the full episode list.
+    val podcastPubkey = remember(noteEvent) { noteEvent.pubKey }
 
-    Column(MaterialTheme.colorScheme.replyModifier) {
+    Column(
+        MaterialTheme.colorScheme.replyModifier.clickable {
+            nav.nav(Route.Podcast(podcastPubkey))
+        },
+    ) {
         PodcastCoverCard(image, note, accountViewModel)
 
         Column(
@@ -83,12 +101,18 @@ fun RenderPodcastMetadata(
             }
 
             description?.takeIf { !makeItShort }?.let {
-                Text(
-                    text = it,
-                    style = MaterialTheme.typography.bodyMedium,
-                    maxLines = 5,
-                    overflow = TextOverflow.Ellipsis,
+                val tags = remember(noteEvent) { noteEvent.tags.toImmutableListOfLists() }
+
+                TranslatableRichTextViewer(
+                    content = it,
+                    canPreview = canPreview,
+                    quotesLeft = 1,
                     modifier = Modifier.fillMaxWidth(),
+                    tags = tags,
+                    backgroundColor = backgroundColor,
+                    id = note.idHex,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
                 )
             }
 
@@ -108,6 +132,32 @@ fun RenderPodcastMetadata(
                     }
                 }
             }
+
+            // Affordance that this card opens a full show page with every episode.
+            Row(
+                modifier = Modifier.fillMaxWidth().padding(top = Size5dp),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(4.dp),
+            ) {
+                Icon(
+                    symbol = MaterialSymbols.Podcasts,
+                    contentDescription = null,
+                    modifier = Modifier.size(16.dp),
+                    tint = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    text = stringRes(R.string.podcast_view_episodes),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.weight(1f),
+                )
+                Icon(
+                    symbol = MaterialSymbols.ChevronRight,
+                    contentDescription = null,
+                    modifier = Modifier.size(18.dp),
+                    tint = MaterialTheme.colorScheme.primary,
+                )
+            }
         }
     }
 }

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

@@ -0,0 +1,121 @@
+/*
+ * 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.podcasts
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.routes.routeFor
+import com.vitorpamplona.amethyst.ui.note.timeAgo
+import com.vitorpamplona.amethyst.ui.note.types.PodcastEpisodeAudioPlayer
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.Size5dp
+import com.vitorpamplona.amethyst.ui.theme.grayText
+import com.vitorpamplona.quartz.nipF4Podcasts.episode.PodcastEpisodeEvent
+
+private val PLAYER_SHAPE = Modifier.clip(RoundedCornerShape(12.dp))
+
+/**
+ * One episode as a compact "show list" row inside a podcast's screen: publish date, title,
+ * short description, and an inline audio player so the episode plays without leaving the list.
+ * The show artwork is the same for every episode, so it's omitted here — the header carries it.
+ */
+@Composable
+fun PodcastEpisodeListItem(
+    note: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val noteEvent = note.event as? PodcastEpisodeEvent ?: return
+
+    val title = remember(noteEvent) { noteEvent.title() }
+    val description = remember(noteEvent) { noteEvent.description() }
+    val firstAudio = remember(noteEvent) { noteEvent.audios().firstOrNull() }
+    val image = remember(noteEvent) { noteEvent.image() }
+
+    val context = LocalContext.current
+    val dateStr = remember(noteEvent) { timeAgo(noteEvent.createdAt, context, prefix = "") }
+
+    Column(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .clickable { routeFor(note, accountViewModel.account)?.let { nav.nav(it) } }
+                .padding(horizontal = 16.dp, vertical = 12.dp),
+        verticalArrangement = Arrangement.spacedBy(Size5dp),
+    ) {
+        dateStr.takeIf { it.isNotBlank() }?.let {
+            Text(
+                text = it,
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.grayText,
+            )
+        }
+
+        title?.let {
+            Text(
+                text = it,
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold,
+                maxLines = 2,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier.fillMaxWidth(),
+            )
+        }
+
+        description?.let {
+            Text(
+                text = it,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.grayText,
+                maxLines = 3,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier.fillMaxWidth(),
+            )
+        }
+
+        firstAudio?.let { audio ->
+            PodcastEpisodeAudioPlayer(
+                audio = audio,
+                note = note,
+                title = title,
+                image = image,
+                borderModifier = PLAYER_SHAPE,
+                accountViewModel = accountViewModel,
+            )
+        }
+    }
+}

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

@@ -0,0 +1,143 @@
+/*
+ * 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.podcasts
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.FlowRow
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.pluralStringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.model.EmptyTagList
+import com.vitorpamplona.amethyst.commons.model.toImmutableListOfLists
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.note.types.PodcastCoverCard
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.DividerThickness
+import com.vitorpamplona.amethyst.ui.theme.Size5dp
+import com.vitorpamplona.amethyst.ui.theme.grayText
+import com.vitorpamplona.quartz.nipF4Podcasts.metadata.PodcastMetadataEvent
+
+/**
+ * Hero header for a single podcast screen: large cover art, title, websites and the show
+ * description (rich text + translation, same as a profile's About), followed by the
+ * "Episodes (N)" section divider that the episode rows hang under.
+ */
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+fun PodcastHeader(
+    metadataNote: Note,
+    metadataEvent: PodcastMetadataEvent?,
+    episodeCount: Int?,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val title = remember(metadataEvent) { metadataEvent?.title() }
+    val image = remember(metadataEvent) { metadataEvent?.image() }
+    val description = remember(metadataEvent) { metadataEvent?.description() }
+    val websites = remember(metadataEvent) { metadataEvent?.websites() ?: emptyList() }
+    val tags = remember(metadataEvent) { metadataEvent?.tags?.toImmutableListOfLists() ?: EmptyTagList }
+
+    Column(Modifier.fillMaxWidth()) {
+        PodcastCoverCard(image, metadataNote, accountViewModel)
+
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 14.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            title?.let {
+                Text(
+                    text = it,
+                    style = MaterialTheme.typography.headlineSmall,
+                    fontWeight = FontWeight.Bold,
+                    modifier = Modifier.fillMaxWidth(),
+                )
+            }
+
+            if (websites.isNotEmpty()) {
+                FlowRow(
+                    horizontalArrangement = Arrangement.spacedBy(Size5dp),
+                    verticalArrangement = Arrangement.spacedBy(Size5dp),
+                ) {
+                    websites.forEach { website ->
+                        Text(
+                            text = website,
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.grayText,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                        )
+                    }
+                }
+            }
+
+            description?.let {
+                val background = remember { mutableStateOf(Color.Transparent) }
+
+                TranslatableRichTextViewer(
+                    content = it,
+                    canPreview = false,
+                    quotesLeft = 1,
+                    modifier = Modifier.fillMaxWidth(),
+                    tags = tags,
+                    backgroundColor = background,
+                    id = metadataNote.idHex,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+            }
+        }
+
+        // Only render once episodes have actually loaded — avoids flashing "0 episodes"
+        // under the cover while the relay request is still in flight.
+        episodeCount?.let { count ->
+            Text(
+                text = pluralStringResource(R.plurals.podcast_episode_count, count, count),
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold,
+                modifier =
+                    Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+            )
+
+            HorizontalDivider(thickness = DividerThickness)
+        }
+    }
+}

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

@@ -0,0 +1,231 @@
+/*
+ * 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.podcasts
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedState
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.observeNoteEvent
+import com.vitorpamplona.amethyst.ui.feeds.FeedError
+import com.vitorpamplona.amethyst.ui.feeds.RefresheableBox
+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.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.topbars.TopBarExtensibleWithBackButton
+import com.vitorpamplona.amethyst.ui.screen.SaveableFeedState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.dal.OnePodcastFeedViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts.datasource.OnePodcastFilterAssemblerSubscription
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.DividerThickness
+import com.vitorpamplona.amethyst.ui.theme.FeedPadding
+import com.vitorpamplona.amethyst.ui.theme.grayText
+import com.vitorpamplona.quartz.nipF4Podcasts.metadata.PodcastMetadataEvent
+
+@Composable
+fun PodcastScreen(
+    pubkey: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val podcast = remember(pubkey) { LocalCache.checkGetOrCreateUser(pubkey) } ?: return
+    val metadataNote =
+        remember(pubkey) {
+            LocalCache.getOrCreateAddressableNote(PodcastMetadataEvent.createAddress(pubkey))
+        }
+
+    val feedViewModel: OnePodcastFeedViewModel =
+        viewModel(
+            key = pubkey + "OnePodcastFeedViewModel",
+            factory = OnePodcastFeedViewModel.Factory(pubkey, accountViewModel.account),
+        )
+
+    PodcastScreen(podcast, metadataNote, feedViewModel, accountViewModel, nav)
+}
+
+@Composable
+fun PodcastScreen(
+    podcast: User,
+    metadataNote: Note,
+    feedViewModel: OnePodcastFeedViewModel,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    WatchLifecycleAndUpdateModel(feedViewModel)
+    // Fetches both the show metadata (kind 10154) and every episode (kind 54) authored by
+    // this podcast's key from its outbox relays.
+    OnePodcastFilterAssemblerSubscription(podcast, accountViewModel)
+
+    val metadataEvent by observeNoteEvent<PodcastMetadataEvent>(metadataNote, accountViewModel)
+
+    DisappearingScaffold(
+        isInvertedLayout = false,
+        topBar = {
+            TopBarExtensibleWithBackButton(
+                title = {
+                    Text(
+                        text = metadataEvent?.title() ?: stringRes(R.string.route_podcasts),
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                        modifier = Modifier.weight(1f),
+                    )
+                },
+                popBack = nav::popBack,
+            )
+        },
+        accountViewModel = accountViewModel,
+    ) {
+        RefresheableBox(feedViewModel, true) {
+            SaveableFeedState(feedViewModel.feedState, scrollStateKey = null) { listState ->
+                PodcastScreenBody(
+                    metadataNote = metadataNote,
+                    metadataEvent = metadataEvent,
+                    feedViewModel = feedViewModel,
+                    listState = listState,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun PodcastScreenBody(
+    metadataNote: Note,
+    metadataEvent: PodcastMetadataEvent?,
+    feedViewModel: OnePodcastFeedViewModel,
+    listState: LazyListState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val feedState by feedViewModel.feedState.feedContent.collectAsStateWithLifecycle()
+
+    when (val state = feedState) {
+        is FeedState.Loaded ->
+            PodcastEpisodesList(metadataNote, metadataEvent, state, listState, accountViewModel, nav)
+
+        is FeedState.Empty ->
+            PodcastHeaderWithStatus(metadataNote, metadataEvent, listState, accountViewModel, nav) {
+                StatusText(stringRes(R.string.podcast_no_episodes))
+            }
+
+        is FeedState.FeedError ->
+            PodcastHeaderWithStatus(metadataNote, metadataEvent, listState, accountViewModel, nav) {
+                FeedError(state.errorMessage) { feedViewModel.invalidateData() }
+            }
+
+        is FeedState.Loading ->
+            PodcastHeaderWithStatus(metadataNote, metadataEvent, listState, accountViewModel, nav) {
+                Box(Modifier.fillMaxWidth().padding(32.dp), contentAlignment = Alignment.Center) {
+                    CircularProgressIndicator()
+                }
+            }
+    }
+}
+
+@Composable
+private fun PodcastEpisodesList(
+    metadataNote: Note,
+    metadataEvent: PodcastMetadataEvent?,
+    loaded: FeedState.Loaded,
+    listState: LazyListState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val items by loaded.feed.collectAsStateWithLifecycle()
+
+    LazyColumn(
+        state = listState,
+        contentPadding = rememberFeedContentPadding(FeedPadding),
+    ) {
+        item("header") {
+            PodcastHeader(metadataNote, metadataEvent, items.list.size, accountViewModel, nav)
+        }
+
+        itemsIndexed(
+            items.list,
+            key = { _, item -> item.idHex },
+            contentType = { _, _ -> "episode" },
+        ) { index, episode ->
+            PodcastEpisodeListItem(episode, accountViewModel, nav)
+
+            if (index < items.list.lastIndex) {
+                HorizontalDivider(thickness = DividerThickness)
+            }
+        }
+    }
+}
+
+@Composable
+private fun PodcastHeaderWithStatus(
+    metadataNote: Note,
+    metadataEvent: PodcastMetadataEvent?,
+    listState: LazyListState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+    status: @Composable () -> Unit,
+) {
+    LazyColumn(
+        state = listState,
+        contentPadding = rememberFeedContentPadding(FeedPadding),
+    ) {
+        item("header") {
+            PodcastHeader(metadataNote, metadataEvent, null, accountViewModel, nav)
+        }
+        item("status") { status() }
+    }
+}
+
+@Composable
+private fun StatusText(text: String) {
+    Box(Modifier.fillMaxWidth().padding(32.dp), contentAlignment = Alignment.Center) {
+        Text(
+            text = text,
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.grayText,
+            textAlign = TextAlign.Center,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/dal/OnePodcastEpisodesFeedFilter.kt

@@ -0,0 +1,62 @@
+/*
+ * 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.podcasts.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.dal.AdditiveFeedFilter
+import com.vitorpamplona.amethyst.ui.dal.DefaultFeedOrder
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nipF4Podcasts.episode.PodcastEpisodeEvent
+
+/**
+ * Every episode of a single podcast. Per NIP-F4 each podcast is its own keypair, so all
+ * episodes (kind 54) of a show are authored by [podcastPubkey]. Episodes are regular events,
+ * so they live in `LocalCache.notes`. Most-recent-first via [DefaultFeedOrder].
+ */
+class OnePodcastEpisodesFeedFilter(
+    val podcastPubkey: HexKey,
+    val account: Account,
+    val cache: LocalCache,
+) : AdditiveFeedFilter<Note>() {
+    override fun feedKey(): String = "podcast-" + podcastPubkey
+
+    override fun feed(): List<Note> {
+        val notes =
+            cache.notes.filterIntoSet { _, it ->
+                acceptableEvent(it)
+            }
+        return sort(notes)
+    }
+
+    override fun applyFilter(newItems: Set<Note>): Set<Note> = newItems.filterTo(HashSet()) { acceptableEvent(it) }
+
+    private fun acceptableEvent(note: Note): Boolean {
+        val noteEvent = note.event
+        return noteEvent is PodcastEpisodeEvent &&
+            noteEvent.pubKey == podcastPubkey &&
+            !note.isHiddenFor(account.hiddenUsers.flow.value) &&
+            account.isAcceptable(note)
+    }
+
+    override fun sort(items: Set<Note>): List<Note> = items.sortedWith(DefaultFeedOrder)
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/dal/OnePodcastFeedViewModel.kt

@@ -0,0 +1,45 @@
+/*
+ * 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.podcasts.dal
+
+import androidx.compose.runtime.Stable
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.ui.screen.AndroidFeedViewModel
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+
+@Stable
+class OnePodcastFeedViewModel(
+    val podcastPubkey: HexKey,
+    val account: Account,
+) : AndroidFeedViewModel(
+        OnePodcastEpisodesFeedFilter(podcastPubkey, account, LocalCache),
+    ) {
+    class Factory(
+        val podcastPubkey: HexKey,
+        val account: Account,
+    ) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T = OnePodcastFeedViewModel(podcastPubkey, account) as T
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/datasource/FilterOnePodcast.kt

@@ -0,0 +1,62 @@
+/*
+ * 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.podcasts.datasource
+
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.relays.SincePerRelayMap
+import com.vitorpamplona.quartz.nip01Core.relay.client.pool.RelayBasedFilter
+import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
+import com.vitorpamplona.quartz.nipF4Podcasts.episode.PodcastEpisodeEvent
+import com.vitorpamplona.quartz.nipF4Podcasts.metadata.PodcastMetadataEvent
+
+// Per NIP-F4 a podcast is its own keypair: the show-level metadata (kind 10154) and every
+// episode (kind 54) are authored by the same pubkey. So a single-podcast screen fetches
+// both kinds from that one author.
+private val OnePodcastKinds =
+    listOf(
+        PodcastMetadataEvent.KIND,
+        PodcastEpisodeEvent.KIND,
+    )
+
+fun filterOnePodcast(
+    user: User,
+    since: SincePerRelayMap?,
+): List<RelayBasedFilter> {
+    // Outbox relays for the podcast key are where the show publishes. Fall back to any relay
+    // we've seen the key on plus stored hints when no NIP-65 list is known.
+    val relays =
+        user.outboxRelays()?.ifEmpty { null }
+            ?: (user.allUsedRelays() + LocalCache.relayHints.hintsForKey(user.pubkeyHex))
+
+    return relays.map { relay ->
+        RelayBasedFilter(
+            relay = relay,
+            filter =
+                Filter(
+                    kinds = OnePodcastKinds,
+                    authors = listOf(user.pubkeyHex),
+                    limit = 500,
+                    since = since?.get(relay)?.time,
+                ),
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/datasource/OnePodcastFeedSubAssembler.kt

@@ -0,0 +1,38 @@
+/*
+ * 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.podcasts.datasource
+
+import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserEoseManager
+import com.vitorpamplona.amethyst.service.relays.SincePerRelayMap
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import com.vitorpamplona.quartz.nip01Core.relay.client.pool.RelayBasedFilter
+
+class OnePodcastFeedSubAssembler(
+    client: INostrClient,
+    allKeys: () -> Set<OnePodcastQueryState>,
+) : PerUserEoseManager<OnePodcastQueryState>(client, allKeys) {
+    override fun updateFilter(
+        key: OnePodcastQueryState,
+        since: SincePerRelayMap?,
+    ): List<RelayBasedFilter> = filterOnePodcast(user(key), since)
+
+    override fun user(key: OnePodcastQueryState) = key.user
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/datasource/OnePodcastFilterAssembler.kt

@@ -0,0 +1,46 @@
+/*
+ * 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.podcasts.datasource
+
+import com.vitorpamplona.amethyst.commons.relayClient.composeSubscriptionManagers.ComposeSubscriptionManager
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+
+// Keyed by the podcast's own pubkey (each podcast is its own keypair per NIP-F4). Multiple
+// screens can subscribe to the same podcast and share the single per-user subscription.
+class OnePodcastQueryState(
+    val user: User,
+)
+
+class OnePodcastFilterAssembler(
+    client: INostrClient,
+) : ComposeSubscriptionManager<OnePodcastQueryState>() {
+    val group =
+        listOf(
+            OnePodcastFeedSubAssembler(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/podcasts/datasource/OnePodcastFilterAssemblerSubscription.kt

@@ -0,0 +1,41 @@
+/*
+ * 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.podcasts.datasource
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import com.vitorpamplona.amethyst.commons.relayClient.subscriptions.LifecycleAwareKeyDataSourceSubscription
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+
+@Composable
+fun OnePodcastFilterAssemblerSubscription(
+    podcast: User,
+    accountViewModel: AccountViewModel,
+) {
+    // Different screens get their own state even when tracking the same podcast key.
+    val state =
+        remember(podcast) {
+            OnePodcastQueryState(podcast)
+        }
+
+    LifecycleAwareKeyDataSourceSubscription(state, accountViewModel.dataSources().onePodcast)
+}

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

@@ -766,6 +766,13 @@
     <string name="route_music_playlists">Playlists</string>
     <string name="route_podcast_episodes">Episodes</string>
     <string name="route_podcasts">Podcasts</string>
+    <string name="podcast_view_episodes">View episodes</string>
+    <string name="podcast_episodes_section">Episodes</string>
+    <string name="podcast_no_episodes">No episodes found yet</string>
+    <plurals name="podcast_episode_count">
+        <item quantity="one">%1$d episode</item>
+        <item quantity="other">%1$d episodes</item>
+    </plurals>
     <string name="new_music_track">New music track</string>
     <string name="new_music_playlist">New playlist</string>
     <string name="music_track_title_label">Title</string>