refactor: delete the main-thread checker

checkNotInMainThread was a debug-only Android assertion (Looper check behind BuildConfig.DEBUG).
Once the cache, feeds and view models moved to commons it could only fire through the
LocalCacheHost.assertNotMainThread hook, which is a no-op on every other front end, so it no
longer guarded the shared code it was sprinkled through. The checker, its call sites and the
host hook are removed; the two comments that explained a Dispatchers.IO switch by the assertion
now give the real reason (compression blocks).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S7FuNBSKiyVecARSoE4B9P

.claude/skills/kotlin-expert/references/common-utilities.md

@@ -47,7 +47,6 @@ Under `quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/utils/`:
 
 - **`commons/src/commonMain/.../threading/Threading.kt`** — shared dispatchers and `CoroutineScope` helpers for commonMain code.
 - **`amethyst/src/main/java/.../service/CoroutinesExt.kt`** — Android-only helpers: `launchIO(block)`, `launchMain(block)` built on top of `Dispatchers.IO` / `Dispatchers.Main`. Use these in ViewModels and services to stop re-spelling the dispatcher every time.
-- **`amethyst/src/main/java/.../service/MainThreadChecker.kt`** — debug assertion helper for catching main-thread misuse during dev.
 
 ## Quartz iterables & JSON
 

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

@@ -24,7 +24,6 @@ import com.vitorpamplona.amethyst.commons.model.cache.FileSystemNip95BlobStore
 import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.amethyst.commons.model.cache.LocalCacheHost
 import com.vitorpamplona.amethyst.commons.model.cache.Nip95BlobStore
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.relay.client.stats.RelayStats
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
@@ -63,6 +62,4 @@ class AmethystLocalCacheHost(
 
     // The zap path's LNURL cache is a quartz-side singleton the outbound-zap resolver fills.
     override fun lnurlEndpoint(lnurlpUrl: String): LnurlEndpointInfo? = LnurlEndpointCache.get(lnurlpUrl)
-
-    override fun assertNotMainThread() = checkNotInMainThread()
 }

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

@@ -64,7 +64,6 @@ import com.vitorpamplona.amethyst.commons.relayauth.RelayAuthPolicy
 import com.vitorpamplona.amethyst.model.backups.BackupConflictStorage
 import com.vitorpamplona.amethyst.model.nip60Cashu.CashuPreferences
 import com.vitorpamplona.amethyst.model.preferences.UiSharedPreferences
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.quartz.concord.cord02Community.ConcordCommunityListEvent
 import com.vitorpamplona.quartz.experimental.ephemChat.list.EphemeralChatListEvent
 import com.vitorpamplona.quartz.marmot.mip00KeyPackages.KeyPackageRelayListEvent
@@ -674,17 +673,14 @@ object LocalPreferences {
         }
     }
 
-    private fun encryptedPreferences(npub: String? = null): SharedPreferences {
-        checkNotInMainThread()
-
-        return if (BuildConfig.DEBUG && DEBUG_PLAINTEXT_PREFERENCES) {
+    private fun encryptedPreferences(npub: String? = null): SharedPreferences =
+        if (BuildConfig.DEBUG && DEBUG_PLAINTEXT_PREFERENCES) {
             val preferenceFile =
                 if (npub == null) DEBUG_PREFERENCES_NAME else "${DEBUG_PREFERENCES_NAME}_$npub"
             Amethyst.instance.appContext.getSharedPreferences(preferenceFile, Context.MODE_PRIVATE)
         } else {
             Amethyst.instance.encryptedStorage(npub)
         }
-    }
 
     /**
      * Clears the preferences for a given npub, deletes the preferences xml file, and switches the

amethyst/src/main/java/com/vitorpamplona/amethyst/service/MainThreadChecker.kt

@@ -1,36 +0,0 @@
-/*
- * 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
-
-import android.os.Looper
-import com.vitorpamplona.amethyst.BuildConfig
-
-fun checkNotInMainThread() {
-    if (BuildConfig.DEBUG && isMainThread()) {
-        throw OnMainThreadException("It should not be in the MainThread")
-    }
-}
-
-fun isMainThread() = Looper.myLooper() == Looper.getMainLooper()
-
-class OnMainThreadException(
-    str: String,
-) : RuntimeException(str)

amethyst/src/main/java/com/vitorpamplona/amethyst/service/cashu/CashuParser.kt

@@ -21,7 +21,6 @@
 package com.vitorpamplona.amethyst.service.cashu
 
 import com.vitorpamplona.amethyst.commons.ui.components.GenericLoadable
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.quartz.nip60Cashu.token.CashuToken
 import com.vitorpamplona.quartz.nip60Cashu.token.CashuTokenB64Parser
 import kotlinx.collections.immutable.ImmutableList
@@ -34,8 +33,6 @@ import kotlinx.collections.immutable.toImmutableList
  */
 class CashuParser {
     fun parse(cashuToken: String): GenericLoadable<ImmutableList<CashuToken>> {
-        checkNotInMainThread()
-
         val parsed =
             CashuTokenB64Parser.parse(cashuToken)
                 ?: return GenericLoadable.Error("Could not parse this cashu token")

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/MediaCompressor.kt

@@ -26,7 +26,6 @@ import android.net.Uri
 import androidx.core.net.toUri
 import androidx.media3.common.MimeTypes
 import com.davotoula.lightcompressor.video.GifToMp4Converter
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.ui.components.util.MediaCompressorFileUtils
 import com.vitorpamplona.quartz.utils.Log
 import id.zelory.compressor.Compressor
@@ -50,8 +49,6 @@ class MediaCompressor {
         useH265: Boolean = false,
         convertGifToMp4: Boolean = false,
     ): MediaCompressorResult {
-        checkNotInMainThread()
-
         // Convert GIF to MP4 if requested. The GIF converter already produces a well-compressed
         // H.264 MP4 so no additional video compression step is needed.
         if (convertGifToMp4 && contentType?.contains("gif", ignoreCase = true) == true) {

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/blossom/BlossomUploader.kt

@@ -31,7 +31,6 @@ import com.vitorpamplona.amethyst.commons.resources.failed_to_upload_to_server_w
 import com.vitorpamplona.amethyst.commons.service.HttpStatusMessages
 import com.vitorpamplona.amethyst.commons.service.upload.BlossomPaymentException
 import com.vitorpamplona.amethyst.commons.ui.loadStringRes
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.uploads.MediaUploadResult
 import com.vitorpamplona.amethyst.service.uploads.PreviewMetadataCalculator
 import com.vitorpamplona.amethyst.service.uploads.extensionFromMimeType
@@ -86,8 +85,6 @@ class BlossomUploader {
         useMediaEndpoint: Boolean = false,
         onProgress: ((bytesWritten: Long, totalBytes: Long) -> Unit)? = null,
     ): MediaUploadResult {
-        checkNotInMainThread()
-
         val contentResolver = context.contentResolver
         val myContentType = contentType ?: contentResolver.getType(uri)
         val fileName = context.getFileName(uri)
@@ -141,8 +138,6 @@ class BlossomUploader {
         useMediaEndpoint: Boolean = false,
         onProgress: ((bytesWritten: Long, totalBytes: Long) -> Unit)? = null,
     ): MediaUploadResult {
-        checkNotInMainThread()
-
         val fileName = baseFileName ?: RandomInstance.randomChars(16)
         val extension =
             contentType?.let {

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/nip96/Nip96Uploader.kt

@@ -32,7 +32,6 @@ import com.vitorpamplona.amethyst.commons.resources.failed_to_delete_with_messag
 import com.vitorpamplona.amethyst.commons.resources.failed_to_upload_to_server_with_message
 import com.vitorpamplona.amethyst.commons.service.HttpStatusMessages
 import com.vitorpamplona.amethyst.commons.ui.loadStringRes
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.uploads.AVIF_EXTENSION
 import com.vitorpamplona.amethyst.service.uploads.AVIF_MIME
 import com.vitorpamplona.amethyst.service.uploads.MediaUploadResult
@@ -105,8 +104,6 @@ class Nip96Uploader {
         httpAuth: suspend (String, String, ByteArray?) -> HTTPAuthorizationEvent?,
         context: Context,
     ): MediaUploadResult {
-        checkNotInMainThread()
-
         val contentResolver = context.contentResolver
         val myContentType = contentType ?: contentResolver.getType(uri)
         val length = size ?: contentResolver.querySize(uri) ?: fileSize(uri) ?: 0
@@ -145,8 +142,6 @@ class Nip96Uploader {
         httpAuth: suspend (String, String, ByteArray?) -> HTTPAuthorizationEvent?,
         context: Context,
     ): MediaUploadResult {
-        checkNotInMainThread()
-
         val fileName = RandomInstance.randomChars(16)
         val extension =
             contentType?.let {

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

@@ -32,7 +32,6 @@ import com.vitorpamplona.amethyst.commons.model.User
 import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.amethyst.commons.service.BundledUpdate
 import com.vitorpamplona.amethyst.commons.util.equalImmutableLists
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.quartz.utils.Log
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
@@ -56,8 +55,6 @@ open class UserFeedViewModel(
     override val isRefreshing: MutableState<Boolean> = mutableStateOf(false)
 
     private fun refreshSuspended() {
-        checkNotInMainThread()
-
         try {
             isRefreshing.value = true
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/cordnGroup/CordnGroupChatScreen.kt

@@ -1039,13 +1039,10 @@ private suspend fun sendAttachment(
     try {
         // The media-quality slider.
         //
-        // Off the main thread, like the strip and the read below it.
+        // Off the main thread, like the strip and the read below it:
         // `sendAttachment` is called from the composition's scope, so it
-        // inherits Main, and `MediaCompressor.compress` opens with
-        // `checkNotInMainThread()` — so every image attachment threw
-        // `OnMainThreadException` before it ever reached the uploader. The
-        // voice path never hit it because it posts its recording already
-        // encoded and skips compression entirely.
+        // inherits Main, and compression blocks. The voice path posts its
+        // recording already encoded and skips compression entirely.
         val compressed =
             withContext(Dispatchers.IO) {
                 item.orchestrator.compressIfNeeded(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/publicChannels/concord/ConcordImageUploader.kt

@@ -54,10 +54,8 @@ class ConcordImageUploader(
     /**
      * Compresses, strips, AES-256-GCM-encrypts and uploads the picked [uri], returning its pointer.
      *
-     * Runs on [Dispatchers.IO]: the compression/upload pipeline asserts it is off the main thread
-     * ([MediaCompressor] calls `checkNotInMainThread`), and callers launch this from a Compose
-     * `rememberCoroutineScope()`, which is Main-dispatched — so without this switch the first step
-     * throws before any bytes leave the device.
+     * Runs on [Dispatchers.IO]: compression, encryption and the upload all block, and callers launch
+     * this from a Compose `rememberCoroutineScope()`, which is Main-dispatched.
      */
     suspend fun uploadEncrypted(
         uri: Uri,

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

@@ -31,7 +31,6 @@ import com.vitorpamplona.amethyst.commons.feeds.StringFeedState
 import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.amethyst.commons.service.BundledUpdate
 import com.vitorpamplona.amethyst.commons.util.equalImmutableLists
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.quartz.utils.Log
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
@@ -55,8 +54,6 @@ open class StringFeedViewModel(
     }
 
     private fun refreshSuspended() {
-        checkNotInMainThread()
-
         try {
             isRefreshing.value = true
 

amethyst/src/play/java/com/vitorpamplona/amethyst/service/lang/LanguageTranslatorService.kt

@@ -30,7 +30,6 @@ import com.google.mlkit.nl.translate.TranslateLanguage
 import com.google.mlkit.nl.translate.Translation
 import com.google.mlkit.nl.translate.Translator
 import com.google.mlkit.nl.translate.TranslatorOptions
-import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
@@ -91,7 +90,6 @@ object LanguageTranslatorService {
         source: String,
         target: String,
     ): Task<ResultOrError> {
-        checkNotInMainThread()
         val sourceLangCode = TranslateLanguage.fromLanguageTag(source)
         val targetLangCode = TranslateLanguage.fromLanguageTag(target)
 
@@ -110,8 +108,6 @@ object LanguageTranslatorService {
         val translator = translators[options]
 
         return translator.downloadModelIfNeeded().onSuccessTask(executorService) {
-            checkNotInMainThread()
-
             val dict = TranslationDictionary.build(text)
             val encoded = TranslationDictionary.encode(text, dict)
 

commons/plans/2026-09-27-one-ui-android-desktop.md

@@ -119,7 +119,7 @@ Each leaving edge is a seam to cut before the group can move.
 | `Amethyst.kt` | `keyCache` (Account), `encryptedStorage` (Geohash), `appContext` (Nip46 bridge), `notificationDispatcher` (EventProcessor) | constructor parameters / ports; the notification dispatcher gets an interface. **Done 2026-09-28**: `keyCache` → `Account.encryptionKeyCache`; the notifications → `MarmotGroupNotifier`, which `NotificationDispatcher` implements; `encryptedStorage` and `appContext` left with the Geohash and Nip46 cuts. |
 | `LocalPreferences.kt` | `saveToEncryptedStorage(accountSettings)` on settings change | **Done 2026-09-28** as a constructor lambda, `Account.saveSettings: suspend (AccountSettings) -> Unit`, rather than a named port. |
 | `DebugUtils.kt` | `logTime` (2 sites) | **Done 2026-09-28.** `commons/util` already had an identical `logTime`; its Android `isDebug` was hard-coded `false`, so it now reads `AndroidDebugFlag.enabled`, which `Amethyst.onCreate` sets. The app copy is gone. |
-| `service/MainThreadChecker.kt` | `checkNotInMainThread` (HiddenUsersState) | **Done 2026-09-28**: `LocalCache.appHost.assertNotMainThread()`, which the app host delegates to the same check. |
+| `service/MainThreadChecker.kt` | `checkNotInMainThread` (HiddenUsersState) | **Done 2026-09-28**: `LocalCache.appHost.assertNotMainThread()`. **Deleted 2026-09-29**: a debug-only Android assertion that shared code could no longer rely on; the checker, its call sites and the host hook are gone. |
 | `service/location/LocationState.kt` | the `LocationResult` type in `geolocationFlow` and the around-me feed | **Done 2026-09-28**: `commons/model/location/LocationResult.kt`; 25 files repointed. |
 | `service/uploads/FileHeader.kt` | the `FileHeader` data type in three send methods | **Done 2026-09-28**: `commons/service/upload/FileHeader.kt` (with `BlurhashWrapper`/`ThumbhashWrapper` moved from commonsUI, same package); `prepare` stays in the app as `FileHeader.Companion` extensions. |
 | `service/relayClient/…/BuzzMembershipEoseManager.kt` | the `MembershipNotificationKinds` constant | **Done 2026-09-28**: `commons/model/buzz/BuzzMembershipKinds.kt`. |

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/feeds/ChannelFeedContentState.kt

@@ -25,7 +25,6 @@ import androidx.compose.runtime.Stable
 import androidx.compose.runtime.mutableStateOf
 import com.vitorpamplona.amethyst.commons.model.Channel
 import com.vitorpamplona.amethyst.commons.model.Note
-import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.amethyst.commons.service.BundledInsert
 import com.vitorpamplona.amethyst.commons.service.BundledUpdate
 import com.vitorpamplona.amethyst.commons.util.equalImmutableLists
@@ -73,8 +72,6 @@ class ChannelFeedContentState(
     }
 
     fun refreshSuspended() {
-        LocalCache.appHost.assertNotMainThread()
-
         isRefreshing.value = true
         try {
             lastFeedKey = localFilter.feedKey()

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/cache/CachePruner.kt

@@ -162,8 +162,6 @@ class CachePruner(
     }
 
     fun pruneOldMessages() {
-        cache.appHost.assertNotMainThread()
-
         cache.ephemeralChannels.forEach { _, channel ->
             pruneOldMessagesChannel(channel)
         }
@@ -310,8 +308,6 @@ class CachePruner(
     }
 
     fun pruneRepliesAndReactions(accounts: Set<HexKey>) {
-        cache.appHost.assertNotMainThread()
-
         val toBeRemoved =
             cache.notes.filter { _, note ->
                 (
@@ -448,8 +444,6 @@ class CachePruner(
     }
 
     fun pruneExpiredEvents() {
-        cache.appHost.assertNotMainThread()
-
         val now = TimeUtils.now()
         val versionsToBeRemoved = cache.notes.filter { _, it -> it.event?.isExpirationBefore(now) == true }
         val addressesToBeRemoved = cache.addressables.filter { _, it -> it.event?.isExpirationBefore(now) == true }
@@ -481,8 +475,6 @@ class CachePruner(
      * authors the reader never muted.
      */
     fun pruneHiddenEvents(hidden: LiveHiddenUsers) {
-        cache.appHost.assertNotMainThread()
-
         val childrenToBeRemoved = mutableListOf<Note>()
 
         val toBeRemoved =

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/cache/CacheSearch.kt

@@ -69,8 +69,6 @@ class CacheSearch(
     ): List<User> {
         if (username.isBlank()) return emptyList()
 
-        cache.appHost.assertNotMainThread()
-
         val key = decodePublicKeyAsHexOrNull(username)
 
         if (key != null) {
@@ -164,8 +162,6 @@ class CacheSearch(
         filters: List<Filter>,
         hidden: LiveHiddenUsers,
     ): List<Note> {
-        cache.appHost.assertNotMainThread()
-
         if (filters.isEmpty()) return emptyList()
 
         // Distinct across filters: a union of arms (a hashtag asks #t, #l and the comment tags)
@@ -201,8 +197,6 @@ class CacheSearch(
         text: String,
         hidden: LiveHiddenUsers,
     ): List<Note> {
-        cache.appHost.assertNotMainThread()
-
         if (text.isBlank()) return emptyList()
 
         val key = decodeEventIdAsHexOrNull(text)

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/cache/EventCache.kt

@@ -3357,8 +3357,6 @@ open class EventCache :
     var verifyMeter: ((elapsedNanos: Long, valid: Boolean) -> Unit)? = null
 
     fun justVerify(event: Event): Boolean {
-        appHost.assertNotMainThread()
-
         val meter = verifyMeter
         if (meter == null) return justVerifyInner(event)
 

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/cache/LocalCacheHost.kt

@@ -98,12 +98,6 @@ interface LocalCacheHost {
      */
     fun lnurlEndpoint(lnurlpUrl: String): LnurlEndpointInfo? = null
 
-    /**
-     * Throws if called on the platform's main thread. Signature verification and the cache
-     * sweeps are far too slow to run there. A no-op by default and on release builds.
-     */
-    fun assertNotMainThread() {}
-
     /** The neutral host: an own IO scope and nothing else. */
     companion object Default : LocalCacheHost {
         override val scope: CoroutineScope by lazy { CoroutineScope(Dispatchers.IO + SupervisorJob()) }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/nip51Lists/HiddenUsersState.kt

@@ -22,7 +22,6 @@ package com.vitorpamplona.amethyst.commons.model.nip51Lists
 
 import com.vitorpamplona.amethyst.commons.model.AccountSettings
 import com.vitorpamplona.amethyst.commons.model.LiveHiddenUsers
-import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip51Lists.muteList.tags.EventTag
 import com.vitorpamplona.quartz.nip51Lists.muteList.tags.HashtagTag
@@ -84,7 +83,6 @@ class HiddenUsersState(
             settings.syncedSettings.security.showSensitiveContent,
             settings.syncedSettings.security.maxHashtagLimit,
         ) { blockList, muteList, transientHiddenUsers, showSensitiveContent, maxHashtagLimit ->
-            LocalCache.appHost.assertNotMainThread()
             emit(assembleLiveHiddenUsers(blockList, muteList, transientHiddenUsers, showSensitiveContent, maxHashtagLimit))
         }.onStart {
             emit(

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/notifications/CardFeedContentState.kt

@@ -123,8 +123,6 @@ class CardFeedContentState(
     private fun refreshSuspended() = refreshLock.withLock { refreshLocked() }
 
     private fun refreshLocked() {
-        LocalCache.appHost.assertNotMainThread()
-
         try {
             isRefreshing.value = true
 
@@ -170,8 +168,6 @@ class CardFeedContentState(
     }
 
     private fun convertToCard(notes: Collection<Note>): List<Card> {
-        LocalCache.appHost.assertNotMainThread()
-
         val reactionsPerEvent = mutableMapOf<Note, MutableList<Note>>()
         notes
             .filter { it.event is ReactionEvent }
@@ -544,8 +540,6 @@ class CardFeedContentState(
     }
 
     fun updateFeedWith(newNotes: Set<Note>) {
-        LocalCache.appHost.assertNotMainThread()
-
         if (localFilter is AdditiveFeedFilter && _feedContent.value is CardFeedState.Loaded) {
             invalidateInsertData(newNotes)
         } else {

commonsUI/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/feeds/TopNavFilterState.kt

@@ -24,7 +24,6 @@ import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.commons.model.Account
 import com.vitorpamplona.amethyst.commons.model.AddressableNote
-import com.vitorpamplona.amethyst.commons.model.cache.LocalCache
 import com.vitorpamplona.amethyst.commons.model.navigation.Route
 import com.vitorpamplona.amethyst.commons.model.nip51Lists.interestSets.InterestSet
 import com.vitorpamplona.amethyst.commons.model.topNavFeeds.TopFilter
@@ -295,7 +294,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, aroundMe, teleport, globalFollow),
@@ -308,7 +306,6 @@ class TopNavFilterState(
 
     private val _badgeRoutes =
         livePeopleListsFlow.transform { peopleLists ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow),
@@ -320,7 +317,6 @@ class TopNavFilterState(
 
     private val _communityRoutes =
         livePeopleListsFlow.transform { peopleLists ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow),
@@ -335,7 +331,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     // Same content-style catalog as kind3GlobalPeopleRoutes, plus "Mine" so the
@@ -353,7 +348,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     // Git repository announcements can be narrowed by author, hashtag and geohash,
@@ -371,7 +365,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     // Workout records can be narrowed by author, hashtag and geohash, so this
@@ -389,7 +382,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     // Highlights can be narrowed by author, hashtag and geohash, so this mirrors
@@ -408,7 +400,6 @@ class TopNavFilterState(
             liveInterestFlows,
             account.relayGroupList.liveRelayGroupServers,
         ) { peopleLists, interests, joinedServers ->
-            LocalCache.appHost.assertNotMainThread()
             // A relay chip per host relay of every group the user joined (kind-10009), so they can
             // browse the OTHER groups on those relays without first having to Favorite them. Deduped
             // against relays that are already chips because they were favorited (kind-10012, already
@@ -442,7 +433,6 @@ class TopNavFilterState(
             livePeopleListsFlow,
             liveInterestFlows,
         ) { peopleLists, interests ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     // Same content-style catalog as kind3GlobalPeopleRoutes, plus "Mine" so the
@@ -457,7 +447,6 @@ class TopNavFilterState(
 
     private val _kind3GlobalPeople =
         livePeopleListsFlow.transform { peopleLists ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, aroundMe, teleport, globalFollow),
@@ -473,7 +462,6 @@ class TopNavFilterState(
     // and AroundMe — none of which can match a tag-less manifest — are deliberately left out.
     private val _authorOnlyRoutes =
         livePeopleListsFlow.transform { peopleLists ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, globalFollow, mineFollow),
@@ -485,7 +473,6 @@ class TopNavFilterState(
 
     private val _notificationLists =
         livePeopleListsFlow.transform { peopleLists ->
-            LocalCache.appHost.assertNotMainThread()
             emit(
                 listOf(
                     listOf(allFollows, userFollows, kind3Follows, aroundMe, teleport, selectedFollow, globalFollow),

commonsUI/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/notifications/NotificationSummaryState.kt

@@ -89,8 +89,6 @@ class NotificationSummaryState(
     fun today(): String = LocalClock.today().ymd()
 
     suspend fun initializeSuspend() {
-        LocalCache.appHost.assertNotMainThread()
-
         val days = LocalClock.epochDayCounter()
 
         val currentUser = user.pubkeyHex
@@ -182,8 +180,6 @@ class NotificationSummaryState(
     }
 
     suspend fun addToStatsSuspend(newBlockNotes: Set<Set<Note>>) {
-        LocalCache.appHost.assertNotMainThread()
-
         val days = LocalClock.epochDayCounter()
 
         val currentUser = user.pubkeyHex
@@ -286,8 +282,6 @@ class NotificationSummaryState(
     }
 
     private suspend fun refreshChartModel() {
-        LocalCache.appHost.assertNotMainThread()
-
         val today = LocalClock.today()
 
         val dataAxisLabelIndexes = listOf(-6, -5, -4, -3, -2, -1, 0)

commonsUI/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/viewmodels/AccountFeedContentStates.kt

@@ -373,8 +373,6 @@ class AccountFeedContentStates(
     }
 
     fun updateFeedsWith(newNotes: Set<Note>) {
-        LocalCache.appHost.assertNotMainThread()
-
         homeLive.updateFeedWith(newNotes)
         homeNewThreads.updateFeedWith(newNotes)
         homeReplies.updateFeedWith(newNotes)
@@ -447,8 +445,6 @@ class AccountFeedContentStates(
     }
 
     fun deleteNotes(newNotes: Set<Note>) {
-        LocalCache.appHost.assertNotMainThread()
-
         homeLive.deleteFromFeed(newNotes)
         homeNewThreads.deleteFromFeed(newNotes)
         homeReplies.deleteFromFeed(newNotes)

commonsUI/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/viewmodels/AccountViewModel.kt

@@ -694,8 +694,6 @@ class AccountViewModel(
         accountChoices: LiveHiddenUsers,
         followUsers: Set<HexKey>,
     ): NoteComposeReportState {
-        LocalCache.appHost.assertNotMainThread()
-
         val isFromLoggedIn = note.author?.pubkeyHex == userProfile().pubkeyHex
         val isFromLoggedInFollow = note.author?.let { followUsers.contains(it.pubkeyHex) } ?: true
         val isPostHidden = note.isHiddenFor(accountChoices)