refactor: drop structural labels from FTS indexable content

The "title: ", "summary: ", "name: ", "Subject: ", "Option: " etc. prefixes
were tokenized into the single FTS content column as literal words, so every
event of a type matched bare terms like "title" or "summary" and the index
carried useless tokens — the same field-name pollution we avoid for JSON
kinds. The FTS table has one content column and search is plain-text MATCH,
so the labels enabled no fielded search; they were pure noise.

Index bare field values instead (listOfNotNull(...).joinToString("\n")),
which also drops the "null" token the older one-liners produced for absent
fields. Applied across all SearchableEvent implementations for consistency.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RFdWREvyvixRXnmNXNzmmN

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/experimental/music/playlist/MusicPlaylistEvent.kt

@@ -88,12 +88,7 @@ class MusicPlaylistEvent(
             if (address.kind == MusicTrackEvent.KIND) address else null
         }
 
-    override fun indexableContent(): String =
-        buildString {
-            append("title: ").append(title().orEmpty()).append('\n')
-            description()?.let { append("description: ").append(it).append('\n') }
-            append(content)
-        }
+    override fun indexableContent(): String = listOfNotNull(title(), description(), content).joinToString("\n")
 
     companion object {
         const val KIND = 34139

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/experimental/music/track/MusicTrackEvent.kt

@@ -59,13 +59,7 @@ class MusicTrackEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent(): String =
-        buildString {
-            append("title: ").append(title().orEmpty()).append('\n')
-            append("artist: ").append(artist().orEmpty()).append('\n')
-            album()?.let { append("album: ").append(it).append('\n') }
-            append(content)
-        }
+    override fun indexableContent(): String = listOfNotNull(title(), artist(), album(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/experimental/nipsOnNostr/NipTextEvent.kt

@@ -66,7 +66,7 @@ class NipTextEvent(
     AddressHintProvider,
     IForkableEvent,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     override fun dTag() = tags.dTag()
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/experimental/zapPolls/ZapPollEvent.kt

@@ -66,7 +66,7 @@ class ZapPollEvent(
     override fun indexableContent() =
         buildString {
             append(content)
-            pollOptionsArray().forEach { append("\nOption: ").append(it.descriptor) }
+            pollOptionsArray().forEach { append('\n').append(it.descriptor) }
         }
 
     override fun eventHints(): List<EventIdHint> {

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/feedDefinition/FeedDefinitionEvent.kt

@@ -43,7 +43,7 @@ class FeedDefinitionEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty()
+    override fun indexableContent() = title().orEmpty()
 
     fun title(): String? = tags.firstOrNull { it.size >= 2 && it[0] == "title" }?.get(1)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip10Notes/TextNoteEvent.kt

@@ -66,7 +66,7 @@ class TextNoteEvent(
     PubKeyHintProvider,
     IForkableEvent,
     SearchableEvent {
-    override fun indexableContent() = "Subject: " + subject() + "\n" + content
+    override fun indexableContent() = listOfNotNull(subject(), content).joinToString("\n")
 
     override fun eventHints(): List<EventIdHint> {
         val eHints = tags.mapNotNull(MarkedETag::parseAsHint)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip23LongContent/LongTextNoteEvent.kt

@@ -71,7 +71,7 @@ class LongTextNoteEvent(
     PublishedAtProvider,
     RootScope,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title() + "\nsummary: " + summary() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
     override fun eventHints(): List<EventIdHint> {
         val qHints = tags.mapNotNull(QTag::parseEventAsHint)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip30CustomEmoji/pack/EmojiPackEvent.kt

@@ -49,7 +49,7 @@ class EmojiPackEvent(
     sig: HexKey,
 ) : PrivateTagArrayEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + titleOrName().orEmpty() + "\ndescription: " + description().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(titleOrName(), description(), content).joinToString("\n")
 
     @Deprecated("NIP-51 has deprecated name. Use title instead", ReplaceWith("title()"))
     fun name() = tags.firstNotNullOfOrNull(NameTag::parse)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip34Git/issue/GitIssueEvent.kt

@@ -61,7 +61,7 @@ class GitIssueEvent(
     EventHintProvider,
     AddressHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "Subject: " + subject() + "\n" + content
+    override fun indexableContent() = listOfNotNull(subject(), content).joinToString("\n")
 
     override fun eventHints(): List<EventIdHint> {
         val qHints = tags.mapNotNull(QTag::parseEventAsHint)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip34Git/pr/GitPullRequestEvent.kt

@@ -66,7 +66,7 @@ class GitPullRequestEvent(
     EventHintProvider,
     AddressHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "Subject: " + subject().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(subject(), content).joinToString("\n")
 
     override fun pubKeyHints() = tags.mapNotNull(PTag::parseAsHint)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip34Git/repository/GitRepositoryEvent.kt

@@ -52,7 +52,7 @@ class GitRepositoryEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "name: " + name().orEmpty() + "\ndescription: " + description().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(name(), description(), content).joinToString("\n")
 
     fun name() = tags.firstNotNullOfOrNull(NameTag::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip35Torrents/TorrentEvent.kt

@@ -52,7 +52,7 @@ class TorrentEvent(
     sig: HexKey,
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip52Calendar/appt/day/CalendarDateSlotEvent.kt

@@ -51,7 +51,7 @@ class CalendarDateSlotEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\nsummary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag.Companion::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip52Calendar/appt/time/CalendarTimeSlotEvent.kt

@@ -52,7 +52,7 @@ class CalendarTimeSlotEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\nsummary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag.Companion::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip52Calendar/calendar/CalendarEvent.kt

@@ -44,7 +44,7 @@ class CalendarEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag::parse)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip53LiveActivities/meetingSpaces/MeetingSpaceEvent.kt

@@ -55,7 +55,7 @@ class MeetingSpaceEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     PubKeyHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "room: " + room().orEmpty() + "\nsummary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(room(), summary(), content).joinToString("\n")
 
     override fun pubKeyHints() = tags.mapNotNull(ParticipantTag::parseAsHint)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip53LiveActivities/streaming/LiveActivitiesEvent.kt

@@ -65,7 +65,7 @@ class LiveActivitiesEvent(
     PubKeyHintProvider,
     LiveStreamLike,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\nsummary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
     override fun eventHints(): List<EventIdHint> {
         val pinnedEvents = pinned()

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip58Badges/definition/BadgeDefinitionEvent.kt

@@ -43,7 +43,7 @@ class BadgeDefinitionEvent(
     sig: HexKey,
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     SearchableEvent {
-    override fun indexableContent() = "name: " + name().orEmpty() + "\ndescription: " + description().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(name(), description(), content).joinToString("\n")
 
     fun name() = tags.badgeName()
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip68Picture/PictureEvent.kt

@@ -48,7 +48,7 @@ class PictureEvent(
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig),
     RootScope,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     @kotlinx.serialization.Transient
     @kotlin.jvm.Transient

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip71Video/AddressableVideoEvent.kt

@@ -51,7 +51,7 @@ abstract class AddressableVideoEvent(
     VideoEvent,
     RootScope,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     @kotlinx.serialization.Transient
     @kotlin.jvm.Transient

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip71Video/RegularVideoEvent.kt

@@ -51,7 +51,7 @@ abstract class RegularVideoEvent(
     VideoEvent,
     RootScope,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     @kotlinx.serialization.Transient
     @kotlin.jvm.Transient

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

@@ -58,7 +58,7 @@ class CommunityDefinitionEvent(
     AddressHintProvider,
     PubKeyHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "name: " + name().orEmpty() + "\ndescription: " + description().orEmpty() + "\nrules: " + rules().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(name(), description(), rules(), content).joinToString("\n")
 
     override fun eventHints() = tags.mapNotNull(ETag::parseAsHint) + tags.mapNotNull(QTag::parseEventAsHint)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip75ZapGoals/GoalEvent.kt

@@ -60,7 +60,7 @@ class GoalEvent(
     AddressHintProvider,
     PubKeyHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "summary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(summary(), content).joinToString("\n")
 
     override fun pubKeyHints() = tags.mapNotNull(PTag::parseAsHint)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip7DThreads/ThreadEvent.kt

@@ -41,7 +41,7 @@ class ThreadEvent(
 ) : Event(id, pubKey, createdAt, KIND, tags, content, sig),
     RootScope,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), content).joinToString("\n")
 
     fun title() = tags.title()
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip84Highlights/HighlightEvent.kt

@@ -66,7 +66,7 @@ class HighlightEvent(
     AddressHintProvider,
     PubKeyHintProvider,
     SearchableEvent {
-    override fun indexableContent() = "comment: " + comment() + "\ncontext: " + context() + "\n" + content
+    override fun indexableContent() = listOfNotNull(comment(), context(), content).joinToString("\n")
 
     override fun eventHints(): List<EventIdHint> {
         val eHints = tags.mapNotNull(ETag::parseAsHint)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip99Classifieds/ClassifiedsEvent.kt

@@ -55,7 +55,7 @@ class ClassifiedsEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, KIND, tags, content, sig),
     PublishedAtProvider,
     SearchableEvent {
-    override fun indexableContent() = "title: " + title().orEmpty() + "\nsummary: " + summary().orEmpty() + "\n" + content
+    override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
     fun title() = tags.firstNotNullOfOrNull(TitleTag::parse)
 

quartz/src/jvmTest/kotlin/com/vitorpamplona/quartz/nip01Core/store/fs/FsSearchTest.kt

@@ -105,9 +105,9 @@ class FsSearchTest {
 
             val ftsRoot = root.resolve("idx/fts")
             val tokenDirs = ftsRoot.listDirectoryEntries().map { it.fileName.toString() }.toSet()
-            // TextNoteEvent.indexableContent() prepends a "Subject: " prefix so
-            // we get the content tokens plus the subject ones. What matters is
-            // that each unique token yields exactly one entry under its dir.
+            // This note has no subject, so indexableContent() is just the
+            // content. What matters is that each unique token yields exactly
+            // one entry under its dir.
             assertTrue("bitcoin" in tokenDirs)
             assertTrue("nostr" in tokenDirs)
             assertEquals(1, ftsRoot.resolve("bitcoin").listDirectoryEntries().size)