refactor(shared): remove telemetry and crash reporting, keep bug reports

Delete the TelemetryRecorder, CrashReporter, PendingCrashStore and platform crash hooks along with their models, JSON encoders and the diagnostics opt-in preference. The DiagnosticsTransport interface is narrowed to sendBugReport, and DiagnosticsCoordinator now only wires the bug-report service and install id. Bug reporting, the breadcrumb buffer, log redaction and the diagnostics endpoint config are kept. Regenerate localization after dropping the diagnostics_* keys.
2026-08-05 10:29:58 +02:00 · 2026-08-02 10:02:28 +02:00
parent 232fb125d3
commit b8a002a2ad
37 changed files with 55 additions and 1921 deletions
--- a/shared/src/commonMain/composeResources/values-de/strings.xml
+++ b/shared/src/commonMain/composeResources/values-de/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Auf NFC-Tag schreiben</string>
    <string name="device_model_title">Gerätemodell</string>
    <string name="device_name_title">Gerätename</string>
-    <string name="diagnostics_description">Anonyme Absturzberichte und Nutzungsereignisse senden, damit wir VniDrop verbessern können. Sie können dies jederzeit deaktivieren. Einladungen, Dateipfade und Übertragungsinhalte werden niemals einbezogen.</string>
-    <string name="diagnostics_disabled_message">Die Freigabe von Diagnosedaten ist deaktiviert.</string>
-    <string name="diagnostics_enabled_message">Die Freigabe von Diagnosedaten ist aktiviert.</string>
-    <string name="diagnostics_title">Diagnosedaten teilen</string>
    <string name="error_camera">Für das Scannen eines QR-Codes ist Kamerazugriff erforderlich.</string>
    <string name="error_device_info">Geräteinformationen konnten nicht geladen werden.</string>
    <string name="error_destination_exists">Am Ziel ist bereits eine Datei mit demselben Namen vorhanden. Wählen Sie einen anderen Ordner oder entfernen Sie die vorhandene Datei.</string>
--- a/shared/src/commonMain/composeResources/values-es/strings.xml
+++ b/shared/src/commonMain/composeResources/values-es/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Escribir en etiqueta NFC</string>
    <string name="device_model_title">Modelo del dispositivo</string>
    <string name="device_name_title">Nombre del dispositivo</string>
-    <string name="diagnostics_description">Enviar informes de fallos y eventos de uso anónimos para ayudarnos a mejorar VniDrop. Puede desactivarlo en cualquier momento. Las invitaciones, las rutas de archivos y el contenido de las transferencias nunca se incluyen.</string>
-    <string name="diagnostics_disabled_message">El uso compartido de diagnósticos está desactivado.</string>
-    <string name="diagnostics_enabled_message">El uso compartido de diagnósticos está activado.</string>
-    <string name="diagnostics_title">Compartir diagnósticos</string>
    <string name="error_camera">Se necesita acceso a la cámara para escanear un código QR.</string>
    <string name="error_device_info">No se pudo cargar la información del dispositivo.</string>
    <string name="error_destination_exists">Ya existe un archivo con el mismo nombre en el destino. Elija otra carpeta o elimine el archivo existente.</string>
--- a/shared/src/commonMain/composeResources/values-fr/strings.xml
+++ b/shared/src/commonMain/composeResources/values-fr/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Écrire sur un tag NFC</string>
    <string name="device_model_title">Modèle de l’appareil</string>
    <string name="device_name_title">Nom de l’appareil</string>
-    <string name="diagnostics_description">Envoyer des rapports de plantage et des événements d’utilisation anonymes pour nous aider à améliorer VniDrop. Vous pouvez désactiver cela à tout moment. Les invitations, chemins de fichiers et contenus de transfert ne sont jamais inclus.</string>
-    <string name="diagnostics_disabled_message">Le partage des diagnostics est désactivé.</string>
-    <string name="diagnostics_enabled_message">Le partage des diagnostics est activé.</string>
-    <string name="diagnostics_title">Partager les diagnostics</string>
    <string name="error_camera">L’accès à la caméra est nécessaire pour scanner un QR code.</string>
    <string name="error_device_info">Impossible de charger les informations de l’appareil.</string>
    <string name="error_destination_exists">Un fichier portant le même nom existe déjà dans la destination. Choisissez un autre dossier ou supprimez le fichier existant.</string>
--- a/shared/src/commonMain/composeResources/values-it/strings.xml
+++ b/shared/src/commonMain/composeResources/values-it/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Scrivi su tag NFC</string>
    <string name="device_model_title">Modello del dispositivo</string>
    <string name="device_name_title">Nome del dispositivo</string>
-    <string name="diagnostics_description">Invia report di arresto anomalo ed eventi d’uso anonimi per aiutarci a migliorare VniDrop. Può disattivarlo in qualsiasi momento. Inviti, percorsi dei file e contenuti dei trasferimenti non vengono mai inclusi.</string>
-    <string name="diagnostics_disabled_message">La condivisione dei dati diagnostici è disattivata.</string>
-    <string name="diagnostics_enabled_message">La condivisione dei dati diagnostici è attivata.</string>
-    <string name="diagnostics_title">Condividi dati diagnostici</string>
    <string name="error_camera">Per scansionare un codice QR è necessario l’accesso alla fotocamera.</string>
    <string name="error_device_info">Impossibile caricare le informazioni sul dispositivo.</string>
    <string name="error_destination_exists">Nella destinazione esiste già un file con lo stesso nome. Scelga un’altra cartella o rimuova il file esistente.</string>
--- a/shared/src/commonMain/composeResources/values-nl/strings.xml
+++ b/shared/src/commonMain/composeResources/values-nl/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Naar NFC-tag schrijven</string>
    <string name="device_model_title">Apparaatmodel</string>
    <string name="device_name_title">Apparaatnaam</string>
-    <string name="diagnostics_description">Verstuur anonieme crashrapporten en gebruiksgebeurtenissen zodat we VniDrop kunnen verbeteren. U kunt dit op elk moment uitschakelen. Uitnodigingen, bestandspaden en overdrachtsinhoud worden nooit meegestuurd.</string>
-    <string name="diagnostics_disabled_message">Het delen van diagnostische gegevens is uitgeschakeld.</string>
-    <string name="diagnostics_enabled_message">Het delen van diagnostische gegevens is ingeschakeld.</string>
-    <string name="diagnostics_title">Diagnostische gegevens delen</string>
    <string name="error_camera">Voor het scannen van een QR-code is toegang tot de camera vereist.</string>
    <string name="error_device_info">Apparaatgegevens konden niet worden geladen.</string>
    <string name="error_destination_exists">Er staat al een bestand met dezelfde naam in de doelmap. Kies een andere map of verwijder het bestaande bestand.</string>
--- a/shared/src/commonMain/composeResources/values-pl/strings.xml
+++ b/shared/src/commonMain/composeResources/values-pl/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Zapisz na tagu NFC</string>
    <string name="device_model_title">Model urządzenia</string>
    <string name="device_name_title">Nazwa urządzenia</string>
-    <string name="diagnostics_description">Wysyłaj anonimowe raporty o awariach i zdarzenia użytkowania, aby pomóc nam ulepszać VniDrop. Możesz to wyłączyć w dowolnej chwili. Zaproszenia, ścieżki plików i zawartość transferów nigdy nie są dołączane.</string>
-    <string name="diagnostics_disabled_message">Udostępnianie diagnostyki jest wyłączone.</string>
-    <string name="diagnostics_enabled_message">Udostępnianie diagnostyki jest włączone.</string>
-    <string name="diagnostics_title">Udostępniaj diagnostykę</string>
    <string name="error_camera">Do zeskanowania kodu QR wymagany jest dostęp do aparatu.</string>
    <string name="error_device_info">Nie udało się wczytać informacji o urządzeniu.</string>
    <string name="error_destination_exists">W miejscu docelowym istnieje już plik o tej samej nazwie. Wybierz inny folder lub usuń istniejący plik.</string>
--- a/shared/src/commonMain/composeResources/values-pt/strings.xml
+++ b/shared/src/commonMain/composeResources/values-pt/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Escrever em etiqueta NFC</string>
    <string name="device_model_title">Modelo do dispositivo</string>
    <string name="device_name_title">Nome do dispositivo</string>
-    <string name="diagnostics_description">Enviar relatórios de falhas e eventos de utilização anónimos para nos ajudar a melhorar o VniDrop. Pode desativar isto a qualquer momento. Convites, caminhos de ficheiros e conteúdos das transferências nunca são incluídos.</string>
-    <string name="diagnostics_disabled_message">A partilha de diagnósticos está desativada.</string>
-    <string name="diagnostics_enabled_message">A partilha de diagnósticos está ativada.</string>
-    <string name="diagnostics_title">Partilhar diagnósticos</string>
    <string name="error_camera">É necessário acesso à câmara para ler um código QR.</string>
    <string name="error_device_info">Não foi possível carregar as informações do dispositivo.</string>
    <string name="error_destination_exists">Já existe um ficheiro com o mesmo nome no destino. Escolha outra pasta ou remova o ficheiro existente.</string>
--- a/shared/src/commonMain/composeResources/values-ru/strings.xml
+++ b/shared/src/commonMain/composeResources/values-ru/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Записать на NFC-метку</string>
    <string name="device_model_title">Модель устройства</string>
    <string name="device_name_title">Имя устройства</string>
-    <string name="diagnostics_description">Отправлять анонимные отчёты о сбоях и события использования, чтобы помочь нам улучшать VniDrop. Вы можете отключить это в любой момент. Приглашения, пути к файлам и содержимое передач никогда не включаются.</string>
-    <string name="diagnostics_disabled_message">Передача диагностики отключена.</string>
-    <string name="diagnostics_enabled_message">Передача диагностики включена.</string>
-    <string name="diagnostics_title">Делиться диагностикой</string>
    <string name="error_camera">Для сканирования QR-кода требуется доступ к камере.</string>
    <string name="error_device_info">Не удалось загрузить сведения об устройстве.</string>
    <string name="error_destination_exists">В папке назначения уже есть файл с таким именем. Выберите другую папку или удалите существующий файл.</string>
--- a/shared/src/commonMain/composeResources/values/strings.xml
+++ b/shared/src/commonMain/composeResources/values/strings.xml
@@ -80,10 +80,6 @@
    <string name="button_write_nfc">Write to NFC tag</string>
    <string name="device_model_title">Device model</string>
    <string name="device_name_title">Device name</string>
-    <string name="diagnostics_description">Send anonymous crash reports and usage events so we can improve VniDrop. You can turn this off anytime. Invitations, file paths, and transfer contents are never included.</string>
-    <string name="diagnostics_disabled_message">Diagnostics sharing is off.</string>
-    <string name="diagnostics_enabled_message">Diagnostics sharing is on.</string>
-    <string name="diagnostics_title">Share diagnostics</string>
    <string name="error_camera">Camera access is required to scan a QR code.</string>
    <string name="error_device_info">Could not load device information.</string>
    <string name="error_destination_exists">A file with the same name already exists in the destination. Choose another folder or remove the existing file.</string>
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/App.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/App.kt
@@ -80,7 +80,6 @@ fun App(
 			graph.coreRepository,
 			graph.preferencesRepository,
 			graph.messages,
-			graph.diagnostics,
 		)
 	}
 	val sendViewModel = viewModel {
@@ -105,7 +104,6 @@ fun App(
 			dependencies.localNotificationService,
 			graph.messages,
 			graph.diagnostics.bugReports,
-			graph.diagnostics,
 		)
 	}
 	val appState by appViewModel.state.collectAsStateWithLifecycle()
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/AppGraph.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/AppGraph.kt
@@ -19,9 +19,6 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.cancel
-import kotlinx.coroutines.flow.drop
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.launch

 class AppGraph(
 	val dependencies: AppDependencies,
@@ -40,11 +37,9 @@ class AppGraph(
 			receiveFolder = dependencies.fileSystemService.defaultReceiveFolder(),
 			themeMode = ThemeMode.System,
 			notificationsEnabled = false,
-			diagnosticsEnabled = false,
 		),
 	)
 	val diagnostics = DiagnosticsCoordinator.create(
-		appDataDir = dependencies.environment.defaultCoreDataDir,
 		appVersion = dependencies.environment.appVersion,
 		platform = dependencies.environment.name,
 		preferencesRepository = preferencesRepository,
@@ -75,12 +70,6 @@ class AppGraph(
 	init {
 		AppLogger.initialize(dependencies.environment.defaultCoreDataDir)
 		diagnostics.start()
-		applicationScope.launch {
-			visibility.isForeground
-				.drop(1)
-				.filter { isForeground -> !isForeground }
-				.collect { diagnostics.telemetry.flush() }
-		}
 	}

 	fun close() {
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/CrashReporter.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/CrashReporter.kt
@@ -1,158 +0,0 @@
-package com.vnidrop.app.diagnostics
-
-import com.vnidrop.app.logging.AppLogger
-import com.vnidrop.app.logging.platformNowMillis
-import com.vnidrop.app.preferences.PreferencesRepository
-import com.vnidrop.app.util.randomUuidString
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.CancellationException
-import kotlinx.coroutines.flow.first
-import kotlinx.coroutines.launch
-import kotlin.concurrent.atomics.AtomicBoolean
-import kotlin.concurrent.atomics.AtomicReference
-import kotlin.concurrent.atomics.ExperimentalAtomicApi
-
-/**
- * Captures uncaught exceptions to disk, then uploads on a later launch when
- * diagnostics is enabled (and when a real [DiagnosticsTransport] is wired).
- */
-@OptIn(ExperimentalAtomicApi::class)
-class CrashReporter(
-	private val store: PendingCrashStore,
-	private val preferencesRepository: PreferencesRepository,
-	private val transport: DiagnosticsTransport,
-	private val breadcrumbs: BreadcrumbBuffer,
-	private val appVersion: String,
-	private val platform: String,
-	private val scope: CoroutineScope,
-) {
-	private val installed = AtomicBoolean(false)
-	private val observingPreferences = AtomicBoolean(false)
-	private val capturePolicy = AtomicReference(CrashCapturePolicy())
-
-	fun startObservingPreferences() {
-		if (!observingPreferences.compareAndSet(false, true)) return
-		scope.launch {
-			preferencesRepository.preferences.collect { prefs ->
-				capturePolicy.store(
-					CrashCapturePolicy(
-						installId = prefs.diagnosticsInstallId,
-						diagnosticsEnabled = prefs.diagnosticsEnabled,
-					),
-				)
-				if (!prefs.diagnosticsEnabled) {
-					runCatching(::deleteAllPending)
-				}
-			}
-		}
-	}
-
-	fun installUnhandledExceptionHandler() {
-		if (!DiagnosticsBuildConfig.INCLUDED) return
-		if (!installed.compareAndSet(false, true)) return
-		installPlatformCrashHook { throwable ->
-			capture(throwable)
-		}
-	}
-
-	fun capture(throwable: Throwable, diagnosticsEnabledOverride: Boolean? = null): CrashReport {
-		val policy = capturePolicy.load()
-		val report = CrashReport(
-			id = randomUuidString(),
-			timestampMillis = platformNowMillis(),
-			installId = sanitizeDiagnosticsInstallId(policy.installId),
-			appVersion = appVersion.takeUtf8Bytes(DiagnosticsJson.MaxAppVersionBytes),
-			platform = platform.takeUtf8Bytes(DiagnosticsJson.MaxPlatformBytes),
-			exceptionType = throwable::class.simpleName ?: "Throwable",
-			exceptionMessage = LogRedactor.redact(throwable.message.orEmpty()).takeUtf8Bytes(MaxMessageBytes),
-			stackTrace = LogRedactor.redact(throwable.stackTraceToString()).takeUtf8Bytes(MaxStackBytes),
-			breadcrumbs = breadcrumbs.snapshot(),
-			diagnosticsEnabledAtCapture = diagnosticsEnabledOverride ?: policy.diagnosticsEnabled,
-		)
-		if (report.diagnosticsEnabledAtCapture != false) {
-			runCatching { store.write(report) }
-			runCatching {
-				store.prune(
-					olderThanTimestampMillis = platformNowMillis() - LocalRetentionMillis,
-					maxCount = MaxLocalCrashCount,
-				)
-			}
-		}
-		AppLogger.error("crash", "captured crash ${report.id}", throwable)
-		return report
-	}
-
-	/**
-	 * Uploads pending crashes that were captured with diagnostics enabled.
-	 * Local files are deleted after successful delivery or bounded by local retention.
-	 */
-	suspend fun flushPending() {
-		store.prune(
-			olderThanTimestampMillis = platformNowMillis() - LocalRetentionMillis,
-			maxCount = MaxLocalCrashCount,
-		)
-		for (report in store.list()) {
-			val preferences = preferencesRepository.preferences.first()
-			if (!preferences.diagnosticsEnabled || capturePolicy.load().diagnosticsEnabled == false) {
-				deleteAllPending()
-				return
-			}
-			if (report.diagnosticsEnabledAtCapture == false) {
-				store.delete(report.id)
-				continue
-			}
-			val installId = sanitizeDiagnosticsInstallId(
-				preferences.diagnosticsInstallId.ifBlank {
-					preferencesRepository.ensureDiagnosticsInstallId()
-				},
-			)
-			val resolved = report.copy(
-				installId = report.installId.ifBlank { installId },
-				diagnosticsEnabledAtCapture = true,
-			)
-			if (resolved != report) store.write(resolved)
-			if (
-				!preferencesRepository.preferences.first().diagnosticsEnabled ||
-				capturePolicy.load().diagnosticsEnabled == false
-			) {
-				deleteAllPending()
-				return
-			}
-			val result = try {
-				transport.sendCrash(resolved)
-			} catch (cancelled: CancellationException) {
-				throw cancelled
-			} catch (error: Throwable) {
-				Result.failure(error)
-			}
-			if (result.isSuccess) {
-				store.delete(resolved.id)
-				continue
-			}
-			val error = result.exceptionOrNull()
-			if (error?.isPermanentDiagnosticsPayloadRejection() == true) {
-				store.delete(resolved.id)
-				continue
-			}
-			break
-		}
-	}
-
-	private fun deleteAllPending() {
-		store.list().forEach { report -> store.delete(report.id) }
-	}
-
-	companion object {
-		private const val MaxMessageBytes = 2_000
-		private const val MaxStackBytes = 32_000
-		private const val MaxLocalCrashCount = 20
-		private const val LocalRetentionMillis = 30L * 86_400_000L
-	}
-}
-
-private data class CrashCapturePolicy(
-	val installId: String = "",
-	val diagnosticsEnabled: Boolean? = null,
-)
-
-expect fun installPlatformCrashHook(onCrash: (Throwable) -> Unit)
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsCoordinator.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsCoordinator.kt
@@ -5,67 +5,34 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.launch

 /**
- * Owns diagnostics services for the app process: telemetry, crashes, bug reports.
+ * Owns user-initiated bug reports for the app process.
 *
- * When [DiagnosticsBuildConfig.INCLUDED] is false (compile-time), telemetry and
- * crash auto-reporting are never started; [bugReports] still works for support.
+ * Telemetry and crash auto-reporting were removed; only [bugReports] remains,
+ * and it only sends when the user submits a report from Settings.
 */
 class DiagnosticsCoordinator(
 	val preferencesRepository: PreferencesRepository,
 	val transport: DiagnosticsTransport,
 	val breadcrumbs: BreadcrumbBuffer,
-	val telemetry: TelemetryRecorder,
-	val crashReporter: CrashReporter,
 	val bugReports: BugReportService,
 	private val scope: CoroutineScope,
-	private val included: Boolean = DiagnosticsBuildConfig.INCLUDED,
 ) {
 	fun start() {
-		// Install id is useful for bug-report correlation even without telemetry.
+		// Install id is useful for bug-report correlation.
 		scope.launch {
 			preferencesRepository.ensureDiagnosticsInstallId()
 		}
-		if (!included) return
-		crashReporter.startObservingPreferences()
-		crashReporter.installUnhandledExceptionHandler()
-		scope.launch {
-			crashReporter.flushPending()
-		}
-	}
-
-	fun record(name: String, properties: Map<String, String> = emptyMap()) {
-		if (!included) return
-		telemetry.record(name, properties)
 	}

 	companion object {
 		fun create(
-			appDataDir: String,
 			appVersion: String,
 			platform: String,
 			preferencesRepository: PreferencesRepository,
 			scope: CoroutineScope,
 			transport: DiagnosticsTransport = NoOpDiagnosticsTransport(),
-			included: Boolean = DiagnosticsBuildConfig.INCLUDED,
 		): DiagnosticsCoordinator {
 			val breadcrumbs = BreadcrumbBuffer()
-			val crashStore = createPendingCrashStore(appDataDir)
-			val telemetry = TelemetryRecorder(
-				preferencesRepository = preferencesRepository,
-				transport = transport,
-				breadcrumbs = breadcrumbs,
-				scope = scope,
-				included = included,
-			)
-			val crashReporter = CrashReporter(
-				store = crashStore,
-				preferencesRepository = preferencesRepository,
-				transport = transport,
-				breadcrumbs = breadcrumbs,
-				appVersion = appVersion,
-				platform = platform,
-				scope = scope,
-			)
 			val bugReports = BugReportService(
 				preferencesRepository = preferencesRepository,
 				transport = transport,
@@ -77,11 +44,8 @@ class DiagnosticsCoordinator(
 				preferencesRepository = preferencesRepository,
 				transport = transport,
 				breadcrumbs = breadcrumbs,
-				telemetry = telemetry,
-				crashReporter = crashReporter,
 				bugReports = bugReports,
 				scope = scope,
-				included = included,
 			)
 		}
 	}
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsJson.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsJson.kt
@@ -10,83 +10,6 @@ internal object DiagnosticsJson {
 	internal const val MaxPlatformBytes = 40
 	private const val MaxBreadcrumbsJsonBytes = 16_000
 	private const val MaxBreadcrumbs = 40
-	private const val SizedBatchId = "00000000-0000-4000-8000-000000000000"
-
-	fun eventsBody(
-		batchId: String,
-		installId: String,
-		appVersion: String,
-		platform: String,
-		events: List<TelemetryEvent>,
-	): String = buildString {
-		append('{')
-		appendJsonField("batchId", batchId)
-		append(',')
-		appendJsonField("installId", installId)
-		append(',')
-		appendJsonField("appVersion", appVersion)
-		append(',')
-		appendJsonField("platform", platform)
-		append(',')
-		append("\"events\":[")
-		events.forEachIndexed { index, event ->
-			if (index > 0) append(',')
-			append('{')
-			appendJsonField("name", event.name)
-			append(',')
-			append("\"timestampMillis\":")
-			append(event.timestampMillis)
-			append(',')
-			append("\"schemaVersion\":")
-			append(event.schemaVersion)
-			append(',')
-			append("\"properties\":")
-			appendStringMap(event.properties)
-			append('}')
-		}
-		append("]}")
-	}
-
-	fun eventBatchFitsRequest(events: List<TelemetryEvent>): Boolean =
-		eventsBody(
-			batchId = SizedBatchId,
-			installId = "\u0000".repeat(MaxInstallIdBytes),
-			appVersion = "\u0000".repeat(MaxAppVersionBytes),
-			platform = "\u0000".repeat(MaxPlatformBytes),
-			events = events,
-		).encodeToByteArray().size <= MaxRequestBytes
-
-	fun crashBody(report: CrashReport): String = buildString {
-		append('{')
-		appendJsonField("id", report.id)
-		append(',')
-		append("\"timestampMillis\":")
-		append(report.timestampMillis)
-		append(',')
-		appendJsonField("installId", report.installId)
-		append(',')
-		appendJsonField("appVersion", report.appVersion)
-		append(',')
-		appendJsonField("platform", report.platform)
-		append(',')
-		appendJsonField("exceptionType", report.exceptionType)
-		append(',')
-		appendJsonField("exceptionMessage", report.exceptionMessage)
-		append(',')
-		appendJsonField("stackTrace", report.stackTrace)
-		append(',')
-		append("\"diagnosticsEnabledAtCapture\":")
-		append(requireNotNull(report.diagnosticsEnabledAtCapture) {
-			"crash consent must be resolved before delivery"
-		})
-		append(',')
-		append("\"schemaVersion\":")
-		append(report.schemaVersion)
-		append(',')
-		append("\"breadcrumbs\":")
-		appendBreadcrumbs(report.breadcrumbs)
-		append('}')
-	}

 	fun bugBody(report: BugReport): String {
 		val logs = if (report.includeLogs) report.logs else ""
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsModels.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsModels.kt
@@ -5,40 +5,12 @@ package com.vnidrop.app.diagnostics
 * intentionally abstracted; nothing here assumes a network backend.
 */

-data class TelemetryEvent(
-	val name: String,
-	val timestampMillis: Long,
-	val properties: Map<String, String> = emptyMap(),
-	val schemaVersion: Int = DiagnosticsSchemaVersion,
-)
-
-/** One idempotent upload unit; [id] remains stable when delivery is retried. */
-data class TelemetryBatch(
-	val id: String,
-	val events: List<TelemetryEvent>,
-)
-
 data class Breadcrumb(
 	val name: String,
 	val timestampMillis: Long,
 	val properties: Map<String, String> = emptyMap(),
 )

-data class CrashReport(
-	val id: String,
-	val timestampMillis: Long,
-	val installId: String,
-	val appVersion: String,
-	val platform: String,
-	val exceptionType: String,
-	val exceptionMessage: String,
-	val stackTrace: String,
-	val breadcrumbs: List<Breadcrumb>,
-	/** `null` only while a startup crash is waiting for the persisted preference to load. */
-	val diagnosticsEnabledAtCapture: Boolean?,
-	val schemaVersion: Int = DiagnosticsSchemaVersion,
-)
-
 data class DeviceSnapshot(
 	val deviceName: String?,
 	val deviceModel: String?,
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsTransport.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/DiagnosticsTransport.kt
@@ -1,50 +1,25 @@
 package com.vnidrop.app.diagnostics

-/** Network boundary for diagnostics; keep batching and validation client-side. */
+/** Network boundary for bug reports; keep validation client-side. */
 interface DiagnosticsTransport {
-	suspend fun sendEvents(batch: TelemetryBatch): Result<Unit>
-	suspend fun sendCrash(report: CrashReport): Result<Unit>
 	suspend fun sendBugReport(report: BugReport): Result<Unit>
 }

 internal class DiagnosticsUnavailableException : IllegalStateException("diagnostics delivery is not configured")

-internal fun Throwable.isPermanentDiagnosticsPayloadRejection(): Boolean =
-	this is DiagnosticsPayloadException ||
-		(this is DiagnosticsHttpException && statusCode in setOf(400, 413, 415, 422))
-
 /** Fails delivery without leaving the device. Used until a remote endpoint is configured. */
 class NoOpDiagnosticsTransport : DiagnosticsTransport {
-	override suspend fun sendEvents(batch: TelemetryBatch): Result<Unit> = unavailable()
-	override suspend fun sendCrash(report: CrashReport): Result<Unit> = unavailable()
-	override suspend fun sendBugReport(report: BugReport): Result<Unit> = unavailable()
-
-	private fun unavailable(): Result<Unit> = Result.failure(DiagnosticsUnavailableException())
+	override suspend fun sendBugReport(report: BugReport): Result<Unit> =
+		Result.failure(DiagnosticsUnavailableException())
 }

 /**
 * Test double that records calls and can fail on demand.
 */
 class RecordingDiagnosticsTransport : DiagnosticsTransport {
-	val eventBatches = mutableListOf<TelemetryBatch>()
-	val events: List<List<TelemetryEvent>>
-		get() = eventBatches.map(TelemetryBatch::events)
-	val crashes = mutableListOf<CrashReport>()
 	val bugReports = mutableListOf<BugReport>()
-	var eventsResult: Result<Unit> = Result.success(Unit)
-	var crashResult: Result<Unit> = Result.success(Unit)
 	var bugResult: Result<Unit> = Result.success(Unit)

-	override suspend fun sendEvents(batch: TelemetryBatch): Result<Unit> {
-		eventBatches += batch
-		return eventsResult
-	}
-
-	override suspend fun sendCrash(report: CrashReport): Result<Unit> {
-		crashes += report
-		return crashResult
-	}
-
 	override suspend fun sendBugReport(report: BugReport): Result<Unit> {
 		bugReports += report
 		return bugResult
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/HttpDiagnosticsTransport.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/HttpDiagnosticsTransport.kt
@@ -27,33 +27,6 @@ class HttpDiagnosticsTransport(
 		}
 	}

-	override suspend fun sendEvents(batch: TelemetryBatch): Result<Unit> {
-		if (batch.events.isEmpty()) return Result.success(Unit)
-		if (batch.events.size > TelemetryRecorder.MaxEventsPerBatch) {
-			return Result.failure(DiagnosticsPayloadException("diagnostics event batch is too large"))
-		}
-		if (batch.events.any { it.name.isBlank() || it.timestampMillis < 0 }) {
-			return Result.failure(DiagnosticsPayloadException("diagnostics event batch is invalid"))
-		}
-		val installId = sanitizeDiagnosticsInstallId(installIdProvider())
-		val body = DiagnosticsJson.eventsBody(
-			batch.id,
-			installId,
-			appVersion.takeUtf8Bytes(DiagnosticsJson.MaxAppVersionBytes),
-			platform.takeUtf8Bytes(DiagnosticsJson.MaxPlatformBytes),
-			batch.events,
-		)
-		return postJson("/v1/events", body, installId, batch.id)
-	}
-
-	override suspend fun sendCrash(report: CrashReport): Result<Unit> {
-		if (report.diagnosticsEnabledAtCapture == null) {
-			return Result.failure(DiagnosticsPayloadException("crash consent is unresolved"))
-		}
-		val body = DiagnosticsJson.crashBody(report)
-		return postJson("/v1/crashes", body, report.installId, report.id)
-	}
-
 	override suspend fun sendBugReport(report: BugReport): Result<Unit> {
 		val body = DiagnosticsJson.bugBody(report)
 		return postJson("/v1/bugs", body, report.installId, report.id)
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/PendingCrashStore.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/PendingCrashStore.kt
@@ -1,193 +0,0 @@
-package com.vnidrop.app.diagnostics
-
-/**
- * Durable crash envelopes written during process death and read on next launch.
- * Encoding is a simple line-oriented format (no kotlinx.serialization dependency).
- */
-interface PendingCrashStore {
-	fun write(report: CrashReport)
-	fun list(): List<CrashReport>
-	fun delete(id: String)
-	fun prune(olderThanTimestampMillis: Long, maxCount: Int)
-}
-
-expect fun createPendingCrashStore(appDataDir: String): PendingCrashStore
-
-internal object CrashReportCodec {
-	private const val FieldSep = "\u001f"
-	private const val RecordSep = "\u001e"
-	private const val Version2Prefix = "vnidrop-crash-v2\n"
-	private const val MaxEncodedChars = 512 * 1024
-
-	fun encode(report: CrashReport): String = buildString {
-		fun field(key: String, value: String) {
-			append(key)
-			append('=')
-			append(value.hexEncode())
-			append('\n')
-		}
-		append(Version2Prefix)
-		field("id", report.id)
-		field("ts", report.timestampMillis.toString())
-		field("install", report.installId)
-		field("app", report.appVersion)
-		field("platform", report.platform)
-		field("type", report.exceptionType)
-		field("message", report.exceptionMessage)
-		field("stack", report.stackTrace)
-		field(
-			"diag",
-			when (report.diagnosticsEnabledAtCapture) {
-				true -> "1"
-				false -> "0"
-				null -> "u"
-			},
-		)
-		field("schema", report.schemaVersion.toString())
-		val breadcrumbs = report.breadcrumbs.take(40)
-		field("crumb.count", breadcrumbs.size.toString())
-		breadcrumbs.forEachIndexed { crumbIndex, crumb ->
-			field("crumb.$crumbIndex.ts", crumb.timestampMillis.toString())
-			field("crumb.$crumbIndex.name", crumb.name)
-			val properties = crumb.properties.entries.take(MaxDiagnosticProperties)
-			field("crumb.$crumbIndex.prop.count", properties.size.toString())
-			properties.forEachIndexed { propertyIndex, (key, value) ->
-				field("crumb.$crumbIndex.prop.$propertyIndex.key", key)
-				field("crumb.$crumbIndex.prop.$propertyIndex.value", value)
-			}
-		}
-	}
-
-	fun decode(raw: String): CrashReport? {
-		if (raw.isBlank() || raw.length > MaxEncodedChars) return null
-		return if (raw.startsWith(Version2Prefix)) decodeVersion2(raw) else decodeLegacy(raw)
-	}
-
-	private fun decodeVersion2(raw: String): CrashReport? {
-		val map = linkedMapOf<String, String>()
-		for (part in raw.removePrefix(Version2Prefix).lineSequence()) {
-			if (part.isEmpty()) continue
-			val eq = part.indexOf('=')
-			if (eq <= 0) continue
-			val key = part.substring(0, eq)
-			val value = part.substring(eq + 1).hexDecode() ?: return null
-			map[key] = value
-		}
-		val crumbCount = map["crumb.count"]?.toIntOrNull()?.takeIf { it in 0..40 } ?: return null
-		val crumbs = buildList {
-			repeat(crumbCount) { crumbIndex ->
-				val timestamp = map["crumb.$crumbIndex.ts"]
-					?.toLongOrNull()
-					?.takeIf { it >= 0 }
-					?: return null
-				val name = map["crumb.$crumbIndex.name"]?.takeIf { it.isNotBlank() } ?: return null
-				val propertyCount = map["crumb.$crumbIndex.prop.count"]
-					?.toIntOrNull()
-					?.takeIf { it in 0..MaxDiagnosticProperties }
-					?: return null
-				val properties = buildMap {
-					repeat(propertyCount) { propertyIndex ->
-						val key = map["crumb.$crumbIndex.prop.$propertyIndex.key"] ?: return null
-						val value = map["crumb.$crumbIndex.prop.$propertyIndex.value"] ?: return null
-						put(key, value)
-					}
-				}
-				add(Breadcrumb(name = name, timestampMillis = timestamp, properties = properties))
-			}
-		}
-		return reportFromFields(map, crumbs)
-	}
-
-	private fun decodeLegacy(raw: String): CrashReport? {
-		val map = linkedMapOf<String, String>()
-		for (part in raw.split(FieldSep)) {
-			if (part.isEmpty()) continue
-			val eq = part.indexOf('=')
-			if (eq <= 0) continue
-			val key = part.substring(0, eq)
-			val value = part.substring(eq + 1)
-				.replace("\\n", "\n")
-				.replace("\\r", "\r")
-			map[key] = value
-		}
-		val crumbs = map["crumbs"].orEmpty()
-			.split(RecordSep)
-			.filter { it.isNotBlank() }
-			.mapNotNull { entry ->
-				val pieces = entry.split('|', limit = 3)
-				if (pieces.size < 2) return@mapNotNull null
-				val ts = pieces[0].toLongOrNull()?.takeIf { it >= 0 } ?: return@mapNotNull null
-				val name = pieces[1].takeIf { it.isNotBlank() } ?: return@mapNotNull null
-				val props = if (pieces.size > 2 && pieces[2].isNotBlank()) {
-					pieces[2].split(',').mapNotNull { kv ->
-						val colon = kv.indexOf(':')
-						if (colon <= 0) null
-						else kv.substring(0, colon) to kv.substring(colon + 1)
-					}.toMap()
-				} else {
-					emptyMap()
-				}
-				Breadcrumb(name = name, timestampMillis = ts, properties = props)
-			}
-		return reportFromFields(map, crumbs)
-	}
-
-	private fun reportFromFields(
-		map: Map<String, String>,
-		crumbs: List<Breadcrumb>,
-	): CrashReport? {
-		val id = map["id"]?.takeIf(::isValidDiagnosticId) ?: return null
-		val timestamp = map["ts"]?.toLongOrNull()?.takeIf { it >= 0 } ?: return null
-		val exceptionType = map["type"]?.takeIf { it.isNotBlank() } ?: return null
-		val schemaVersion = map["schema"]?.toIntOrNull()
-			?.takeIf { it == DiagnosticsSchemaVersion }
-			?: return null
-		val diagnosticsEnabled: Boolean? = when (map["diag"]) {
-			"1" -> true
-			"0" -> false
-			"u" -> null
-			else -> return null
-		}
-		return CrashReport(
-			id = id,
-			timestampMillis = timestamp,
-			installId = map["install"].orEmpty(),
-			appVersion = map["app"].orEmpty(),
-			platform = map["platform"].orEmpty(),
-			exceptionType = exceptionType,
-			exceptionMessage = map["message"].orEmpty(),
-			stackTrace = map["stack"].orEmpty(),
-			breadcrumbs = crumbs,
-			diagnosticsEnabledAtCapture = diagnosticsEnabled,
-			schemaVersion = schemaVersion,
-		)
-	}
-}
-
-internal fun isValidDiagnosticId(id: String): Boolean =
-	DiagnosticIdPattern.matches(id)
-
-private val DiagnosticIdPattern =
-	Regex("^[0-9a-fA-F]{8}(?:-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}$")
-
-private fun String.hexEncode(): String {
-	val digits = "0123456789abcdef"
-	return buildString(length * 2) {
-		for (byte in this@hexEncode.encodeToByteArray()) {
-			val value = byte.toInt() and 0xff
-			append(digits[value ushr 4])
-			append(digits[value and 0x0f])
-		}
-	}
-}
-
-private fun String.hexDecode(): String? {
-	if (length % 2 != 0) return null
-	val bytes = ByteArray(length / 2)
-	for (index in bytes.indices) {
-		val high = this[index * 2].digitToIntOrNull(16) ?: return null
-		val low = this[index * 2 + 1].digitToIntOrNull(16) ?: return null
-		bytes[index] = ((high shl 4) or low).toByte()
-	}
-	return runCatching { bytes.decodeToString(throwOnInvalidSequence = true) }.getOrNull()
-}
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/TelemetryRecorder.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/diagnostics/TelemetryRecorder.kt
@@ -1,216 +0,0 @@
-package com.vnidrop.app.diagnostics
-
-import com.vnidrop.app.logging.platformNowMillis
-import com.vnidrop.app.preferences.PreferencesRepository
-import com.vnidrop.app.util.randomUuidString
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.CancellationException
-import kotlinx.coroutines.channels.Channel
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.distinctUntilChanged
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.sync.Mutex
-import kotlinx.coroutines.sync.withLock
-import kotlinx.coroutines.withTimeoutOrNull
-import kotlin.concurrent.atomics.AtomicReference
-import kotlin.concurrent.atomics.ExperimentalAtomicApi
-
-/**
- * Product telemetry: sparse events, gated by diagnostics opt-in.
- * Events are buffered and flushed in batches when transport is available.
- */
-@OptIn(ExperimentalAtomicApi::class)
-class TelemetryRecorder(
-	private val preferencesRepository: PreferencesRepository,
-	private val transport: DiagnosticsTransport,
-	private val breadcrumbs: BreadcrumbBuffer,
-	private val scope: CoroutineScope,
-	private val maxBufferSize: Int = DefaultMaxBuffer,
-	private val flushThreshold: Int = DefaultFlushThreshold,
-	private val flushIntervalMillis: Long = DefaultFlushIntervalMillis,
-	private val retryBackoffMillis: Long = DefaultRetryBackoffMillis,
-	private val automaticRetryCount: Int = DefaultAutomaticRetryCount,
-	private val included: Boolean = true,
-) {
-	private val bufferMutex = Mutex()
-	private val state = AtomicReference(TelemetryState())
-	private val flushSignals = Channel<Unit>(Channel.CONFLATED)
-
-	init {
-		require(maxBufferSize > 0) { "maxBufferSize must be positive" }
-		require(flushThreshold > 0) { "flushThreshold must be positive" }
-		require(flushIntervalMillis > 0) { "flushIntervalMillis must be positive" }
-		require(retryBackoffMillis > 0) { "retryBackoffMillis must be positive" }
-		require(automaticRetryCount >= 0) { "automaticRetryCount must not be negative" }
-		if (included) {
-			scope.launch {
-				preferencesRepository.preferences
-					.map { it.diagnosticsEnabled }
-					.distinctUntilChanged()
-					.collect { isEnabled ->
-						updateState { current ->
-							if (isEnabled) current.copy(enabled = true) else TelemetryState(enabled = false)
-						}
-						flushSignals.trySend(Unit)
-					}
-			}
-			scope.launch { runAutomaticFlushes() }
-		}
-	}
-
-	fun record(name: String, properties: Map<String, String> = emptyMap()) {
-		if (!included) return
-		val sanitizedName = sanitizeDiagnosticName(name)
-		if (sanitizedName.isBlank()) return
-		val sanitizedProperties = sanitizeDiagnosticProperties(properties)
-		breadcrumbs.add(sanitizedName, sanitizedProperties)
-		val event = TelemetryEvent(
-			name = sanitizedName,
-			timestampMillis = platformNowMillis(),
-			properties = sanitizedProperties,
-		)
-		while (true) {
-			val current = state.load()
-			if (current.enabled == false) return
-			val remainingCapacity =
-				(maxBufferSize - current.retryBatch?.events.orEmpty().size).coerceAtLeast(0)
-			val nextBuffer = (current.buffer + event).takeLast(remainingCapacity)
-			if (state.compareAndSet(current, current.copy(buffer = nextBuffer))) {
-				flushSignals.trySend(Unit)
-				return
-			}
-		}
-	}
-
-	suspend fun flush(): Result<Unit> {
-		return bufferMutex.withLock {
-			var discardedFailure: Throwable? = null
-			var outcome: Result<Unit>? = null
-			while (outcome == null) {
-				val current = state.load()
-				if (current.enabled != true) return@withLock Result.success(Unit)
-				val pendingRetry = current.retryBatch
-				val events = if (pendingRetry == null) nextBatchEvents(current.buffer) else emptyList()
-				if (pendingRetry == null && events.isEmpty()) {
-					outcome = discardedFailure?.let { Result.failure(it) } ?: Result.success(Unit)
-					continue
-				}
-				val batch: TelemetryBatch
-				if (pendingRetry != null) {
-					batch = pendingRetry
-				} else {
-					val prepared = TelemetryBatch(id = randomUuidString(), events = events)
-					val next = current.copy(
-						buffer = current.buffer.drop(events.size),
-						retryBatch = prepared,
-					)
-					if (!state.compareAndSet(current, next)) continue
-					batch = prepared
-				}
-				if (state.load().retryBatch != batch) continue
-				val result = try {
-					transport.sendEvents(batch)
-				} catch (cancelled: CancellationException) {
-					throw cancelled
-				} catch (error: Throwable) {
-					Result.failure(error)
-				}
-				if (result.isSuccess) {
-					clearRetryBatch(batch)
-					continue
-				}
-				val error = result.exceptionOrNull() ?: IllegalStateException("diagnostics event delivery failed")
-				if (error.isPermanentDiagnosticsPayloadRejection()) {
-					clearRetryBatch(batch)
-					discardedFailure = discardedFailure ?: error
-					continue
-				}
-				outcome = result
-			}
-			checkNotNull(outcome)
-		}
-	}
-
-	private fun nextBatchEvents(events: List<TelemetryEvent>): List<TelemetryEvent> {
-		if (events.isEmpty()) return emptyList()
-		var minimum = 1
-		var maximum = minOf(events.size, MaxEventsPerBatch)
-		var accepted = 1
-		while (minimum <= maximum) {
-			val candidateSize = minimum + (maximum - minimum) / 2
-			if (DiagnosticsJson.eventBatchFitsRequest(events.take(candidateSize))) {
-				accepted = candidateSize
-				minimum = candidateSize + 1
-			} else {
-				maximum = candidateSize - 1
-			}
-		}
-		return events.take(accepted)
-	}
-
-	fun pendingCount(): Int {
-		val current = state.load()
-		return current.retryBatch?.events.orEmpty().size + current.buffer.size
-	}
-
-	private suspend fun runAutomaticFlushes() {
-		while (true) {
-			flushSignals.receive()
-			var retries = 0
-			while (true) {
-				val current = state.load()
-				if (current.enabled != true || pendingCount() == 0) break
-				if (current.retryBatch == null && pendingCount() < flushThreshold) {
-					val signalled = withTimeoutOrNull(flushIntervalMillis) {
-						flushSignals.receive()
-						true
-					} ?: false
-					if (signalled) continue
-				}
-
-				val result = flush()
-				if (result.isSuccess || pendingCount() == 0) {
-					retries = 0
-					continue
-				}
-				val error = result.exceptionOrNull()
-				if (error?.isPermanentDiagnosticsPayloadRejection() == true || retries >= automaticRetryCount) {
-					break
-				}
-				retries += 1
-				delay(retryBackoffMillis)
-			}
-		}
-	}
-
-	private fun clearRetryBatch(batch: TelemetryBatch) {
-		while (true) {
-			val current = state.load()
-			if (current.retryBatch != batch) return
-			if (state.compareAndSet(current, current.copy(retryBatch = null))) return
-		}
-	}
-
-	private fun updateState(update: (TelemetryState) -> TelemetryState) {
-		while (true) {
-			val current = state.load()
-			if (state.compareAndSet(current, update(current))) return
-		}
-	}
-
-	companion object {
-		const val DefaultMaxBuffer = 100
-		const val DefaultFlushThreshold = 20
-		const val MaxEventsPerBatch = 50
-		const val DefaultFlushIntervalMillis = 30_000L
-		const val DefaultRetryBackoffMillis = 30_000L
-		const val DefaultAutomaticRetryCount = 3
-	}
-}
-
-private data class TelemetryState(
-	val enabled: Boolean? = null,
-	val buffer: List<TelemetryEvent> = emptyList(),
-	val retryBatch: TelemetryBatch? = null,
-)
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/feature/app/AppViewModel.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/feature/app/AppViewModel.kt
@@ -6,7 +6,6 @@ import com.vnidrop.app.PlatformEnvironment
 import com.vnidrop.app.AppDependencies
 import com.vnidrop.app.AppGraph
 import com.vnidrop.app.core.CoreGateway
-import com.vnidrop.app.diagnostics.DiagnosticsCoordinator
 import com.vnidrop.app.logging.AppLogger
 import com.vnidrop.app.preferences.PreferencesRepository
 import com.vnidrop.app.ui.feedback.UiMessageController
@@ -38,14 +37,12 @@ class AppViewModel(
 	private val repository: CoreGateway,
 	preferencesRepository: PreferencesRepository,
 	private val messages: UiMessageController,
-	private val diagnostics: DiagnosticsCoordinator? = null,
 ) : ViewModel() {
 	private val _state = MutableStateFlow(AppState())
 	val state: StateFlow<AppState> = _state.asStateFlow()

 	init {
 		AppLogger.info("lifecycle", "app started", mapOf("platform" to environment.name))
-		diagnostics?.record("app_open", mapOf("platform" to environment.name, "version" to environment.appVersion))
 		viewModelScope.launch {
 			val relaySettings = preferencesRepository.preferences.first().relaySettings
 			repository.initialize(environment.defaultCoreDataDir, relaySettings).onFailure(messages::error)
@@ -59,6 +56,5 @@ class AppViewModel(

 	fun selectDestination(destination: AppDestination) {
 		_state.update { it.copy(destination = destination) }
-		diagnostics?.record("nav_select", mapOf("destination" to destination.name))
 	}
 }
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/AboutSettings.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/AboutSettings.kt
@@ -18,7 +18,6 @@ import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
-import com.vnidrop.app.diagnostics.DiagnosticsBuildConfig
 import com.vnidrop.app.ui.icons.AppIcon
 import com.vnidrop.app.ui.icons.PlatformIcon
 import com.vnidrop.app.ui.theme.LocalVniDropColors
@@ -46,8 +45,6 @@ import vnidrop.shared.generated.resources.about_privacy_title
 import vnidrop.shared.generated.resources.about_tagline
 import vnidrop.shared.generated.resources.about_title
 import vnidrop.shared.generated.resources.device_model_title
-import vnidrop.shared.generated.resources.diagnostics_description
-import vnidrop.shared.generated.resources.diagnostics_title
 import vnidrop.shared.generated.resources.os_version_title
 import vnidrop.shared.generated.resources.value_unavailable
 import vnidrop.shared.generated.resources.version_title
@@ -57,7 +54,6 @@ private val PrivacyPolicyUrl = com.vnidrop.app.AppConfig.PRIVACY_POLICY_URL
@Composable
 internal fun AboutSettings(
 	state: SettingsState,
-	onDiagnosticsChanged: (Boolean) -> Unit,
 	onReportBug: () -> Unit,
 	onBack: () -> Unit,
 	showBack: Boolean,
@@ -130,17 +126,6 @@ internal fun AboutSettings(
 		}

 		SettingsGroup {
-			if (DiagnosticsBuildConfig.INCLUDED) {
-				SettingsToggleRow(
-					icon = AppIcon.Info,
-					title = stringResource(Res.string.diagnostics_title),
-					description = stringResource(Res.string.diagnostics_description),
-					checked = state.diagnosticsEnabled,
-					enabled = true,
-					onCheckedChange = onDiagnosticsChanged,
-				)
-				SettingsDivider()
-			}
 			SettingsRow(
 				icon = AppIcon.Bug,
 				title = stringResource(Res.string.about_bug_report),
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsRoute.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsRoute.kt
@@ -33,7 +33,6 @@ fun SettingsRoute(viewModel: SettingsViewModel, windowClass: WindowClass) {
 		onResetFolder = viewModel::resetReceiveFolder,
 		onNotificationsChanged = viewModel::setNotificationsEnabled,
 		onOpenNotificationSettings = viewModel::openNotificationSettings,
-		onDiagnosticsChanged = viewModel::setDiagnosticsEnabled,
 		onBugWhatChanged = viewModel::setBugWhatHappened,
 		onBugExpectedChanged = viewModel::setBugExpected,
 		onBugStepsChanged = viewModel::setBugSteps,
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsScreen.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsScreen.kt
@@ -23,7 +23,6 @@ fun SettingsScreen(
 	onResetFolder: () -> Unit,
 	onNotificationsChanged: (Boolean) -> Unit,
 	onOpenNotificationSettings: () -> Unit,
-	onDiagnosticsChanged: (Boolean) -> Unit,
 	onBugWhatChanged: (String) -> Unit,
 	onBugExpectedChanged: (String) -> Unit,
 	onBugStepsChanged: (String) -> Unit,
@@ -62,7 +61,6 @@ fun SettingsScreen(
 					onResetFolder = onResetFolder,
 					onNotificationsChanged = onNotificationsChanged,
 					onOpenNotificationSettings = onOpenNotificationSettings,
-					onDiagnosticsChanged = onDiagnosticsChanged,
 					onBugWhatChanged = onBugWhatChanged,
 					onBugExpectedChanged = onBugExpectedChanged,
 					onBugStepsChanged = onBugStepsChanged,
@@ -105,7 +103,6 @@ fun SettingsScreen(
 				onResetFolder = onResetFolder,
 				onNotificationsChanged = onNotificationsChanged,
 				onOpenNotificationSettings = onOpenNotificationSettings,
-				onDiagnosticsChanged = onDiagnosticsChanged,
 				onBugWhatChanged = onBugWhatChanged,
 				onBugExpectedChanged = onBugExpectedChanged,
 				onBugStepsChanged = onBugStepsChanged,
@@ -140,7 +137,6 @@ private fun SettingsSectionContent(
 	onResetFolder: () -> Unit,
 	onNotificationsChanged: (Boolean) -> Unit,
 	onOpenNotificationSettings: () -> Unit,
-	onDiagnosticsChanged: (Boolean) -> Unit,
 	onBugWhatChanged: (String) -> Unit,
 	onBugExpectedChanged: (String) -> Unit,
 	onBugStepsChanged: (String) -> Unit,
@@ -184,7 +180,6 @@ private fun SettingsSectionContent(
 		)
 		SettingsSection.About -> AboutSettings(
 			state = state,
-			onDiagnosticsChanged = onDiagnosticsChanged,
 			onReportBug = { onSectionSelected(SettingsSection.BugReport) },
 			onBack = onBack,
 			showBack = showBack,
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsViewModel.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/feature/settings/SettingsViewModel.kt
@@ -16,8 +16,6 @@ import com.vnidrop.app.core.TransferStatus
 import com.vnidrop.app.core.usesCustomRelayUrls
 import com.vnidrop.app.diagnostics.BugReportDraft
 import com.vnidrop.app.diagnostics.BugReportService
-import com.vnidrop.app.diagnostics.DiagnosticsBuildConfig
-import com.vnidrop.app.diagnostics.DiagnosticsCoordinator
 import com.vnidrop.app.notifications.LocalNotificationService
 import com.vnidrop.app.notifications.NotificationPermission
 import com.vnidrop.app.preferences.PreferencesRepository
@@ -43,8 +41,6 @@ import vnidrop.shared.generated.resources.bug_report_missing_what
 import vnidrop.shared.generated.resources.bug_report_submit_failed
 import vnidrop.shared.generated.resources.bug_report_submitted
 import vnidrop.shared.generated.resources.button_open_settings
-import vnidrop.shared.generated.resources.diagnostics_disabled_message
-import vnidrop.shared.generated.resources.diagnostics_enabled_message
 import vnidrop.shared.generated.resources.notifications_enabled_message
 import vnidrop.shared.generated.resources.notifications_permission_denied
 import vnidrop.shared.generated.resources.notifications_settings_open_failed
@@ -102,7 +98,6 @@ data class SettingsState(
 	val endpointId: String? = null,
 	val notificationsEnabled: Boolean = false,
 	val notificationPermission: NotificationPermission = NotificationPermission.NotDetermined,
-	val diagnosticsEnabled: Boolean = false,
 	val deviceInfo: DeviceInfo? = null,
 	val appVersion: String = "",
 	val isLoadingDeviceInfo: Boolean = false,
@@ -138,8 +133,6 @@ class SettingsViewModel(
 	private val notifications: LocalNotificationService,
 	private val messages: UiMessageController,
 	private val bugReports: BugReportService,
-	private val diagnostics: DiagnosticsCoordinator? = null,
-	private val diagnosticsIncluded: Boolean = DiagnosticsBuildConfig.INCLUDED,
 ) : ViewModel() {
 	private val _state = MutableStateFlow(
 		SettingsState(
@@ -167,7 +160,6 @@ class SettingsViewModel(
 						receiveFolder = receiveFolder,
 						themeMode = preferences.themeMode,
 						notificationsEnabled = preferences.notificationsEnabled,
-						diagnosticsEnabled = preferences.diagnosticsEnabled,
 						savedRelaySettings = preferences.relaySettings,
 						relayMode = if (hasLocalRelayDraft) current.relayMode else preferences.relaySettings.mode,
 						relayUrls = if (hasLocalRelayDraft) {
@@ -512,25 +504,6 @@ class SettingsViewModel(
 		}
 	}

-	fun setDiagnosticsEnabled(enabled: Boolean) {
-		if (!diagnosticsIncluded) return
-		viewModelScope.launch {
-			preferencesRepository.setDiagnosticsEnabled(enabled)
-			diagnostics?.record(
-				if (enabled) "diagnostics_enabled" else "diagnostics_disabled",
-			)
-			messages.show(
-				UiMessage(
-					UiText.Resource(
-						if (enabled) Res.string.diagnostics_enabled_message
-						else Res.string.diagnostics_disabled_message,
-					),
-					UiMessageTone.Success,
-				),
-			)
-		}
-	}
-
 	fun setBugWhatHappened(value: String) = _state.update { it.copy(bugWhatHappened = value) }
 	fun setBugExpected(value: String) = _state.update { it.copy(bugExpected = value) }
 	fun setBugSteps(value: String) = _state.update { it.copy(bugSteps = value) }
@@ -565,7 +538,6 @@ class SettingsViewModel(
 				)
 				result.fold(
 					onSuccess = {
-						diagnostics?.record("bug_report_submitted")
 						_state.update {
 							it.copy(
 								isSubmittingBugReport = false,
--- a/shared/src/commonMain/kotlin/com/vnidrop/app/preferences/AppPreferencesRepository.kt
+++ b/shared/src/commonMain/kotlin/com/vnidrop/app/preferences/AppPreferencesRepository.kt
@@ -24,9 +24,7 @@ data class AppPreferences(
 	val receiveFolder: ReceiveFolder,
 	val themeMode: ThemeMode,
 	val notificationsEnabled: Boolean,
-	/** Master opt-in for automatic telemetry + crash upload. Bug reports remain available always. */
-	val diagnosticsEnabled: Boolean = false,
-	/** Stable anonymous install id; never an account or advertising id. */
+	/** Stable anonymous install id for bug-report correlation; never an account or advertising id. */
 	val diagnosticsInstallId: String = "",
 	val relaySettings: RelaySettings = RelaySettings(),
 )
@@ -36,7 +34,6 @@ class AppPreferencesDefaults(
 	val receiveFolder: ReceiveFolder,
 	val themeMode: ThemeMode,
 	val notificationsEnabled: Boolean = false,
-	val diagnosticsEnabled: Boolean = false,
 )

 interface PreferencesRepository {
@@ -46,7 +43,6 @@ interface PreferencesRepository {
 	suspend fun resetReceiveFolder()
 	suspend fun setThemeMode(mode: ThemeMode)
 	suspend fun setNotificationsEnabled(enabled: Boolean)
-	suspend fun setDiagnosticsEnabled(enabled: Boolean)
 	suspend fun setRelaySettings(settings: RelaySettings)
 	/** Ensures a durable install id exists and returns it. */
 	suspend fun ensureDiagnosticsInstallId(): String
@@ -83,7 +79,6 @@ class AppPreferencesRepository(
 				receiveFolder = resolveReceiveFolder(prefs, defaults.receiveFolder),
 				themeMode = prefs[PreferenceKeys.ThemeMode]?.let { themeModeOrNull(it) } ?: defaults.themeMode,
 				notificationsEnabled = prefs[PreferenceKeys.NotificationsEnabled] ?: defaults.notificationsEnabled,
-				diagnosticsEnabled = prefs[PreferenceKeys.DiagnosticsEnabled] ?: defaults.diagnosticsEnabled,
 				diagnosticsInstallId = prefs[PreferenceKeys.DiagnosticsInstallId].orEmpty(),
 				relaySettings = RelaySettings(
 					mode = relayMode,
@@ -122,12 +117,6 @@ class AppPreferencesRepository(
 		}
 	}

-	override suspend fun setDiagnosticsEnabled(enabled: Boolean) {
-		dataStore.edit { prefs ->
-			prefs[PreferenceKeys.DiagnosticsEnabled] = enabled
-		}
-	}
-
 	override suspend fun setRelaySettings(settings: RelaySettings) {
 		dataStore.edit { prefs ->
 			prefs[PreferenceKeys.RelayMode] = settings.mode.name
@@ -160,7 +149,6 @@ private object PreferenceKeys {
 	val ReceiveFolderDisplayName = stringPreferencesKey("receive_folder_display_name")
 	val ThemeMode = stringPreferencesKey("theme_mode")
 	val NotificationsEnabled = booleanPreferencesKey("notifications_enabled")
-	val DiagnosticsEnabled = booleanPreferencesKey("diagnostics_enabled")
 	val DiagnosticsInstallId = stringPreferencesKey("diagnostics_install_id")
 	val RelayMode = stringPreferencesKey("relay_mode")
 	val RelayUrls = stringPreferencesKey("relay_urls")