fix(android): coalesce replayed chat message ids

Bumps com.android.library from 9.3.0 to 9.3.1.

---
updated-dependencies:
- dependency-name: com.android.library
  dependency-version: 9.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

DEVLOG.md

@@ -1,5 +1,17 @@
 # Hermes-Relay — Dev Log
 
+## 2026-07-27 — Android replayed-message identity reconciliation
+
+Android history reconciliation now collapses reconnect/rejoin replays of the
+same persisted message ID before publishing the transcript to Compose. The
+latest repeated snapshot replaces the value at the message's first transcript
+position, preserving stable ordering, distinct messages, and the LazyColumn
+identity contract without index- or random-key fallbacks.
+
+Focused coverage reproduces the duplicate UUID condition and verifies that the
+authoritative final content wins while every rendered message keeps a unique
+stable UI key.
+
 ## 2026-07-26 — Android 1.5.1 patch reconciliation
 
 Android 1.5.1 reconciles the post-1.5.0 voice and chat fixes into versionCode

app/src/main/kotlin/com/hermesandroid/relay/network/upstream/ChatHandler.kt

@@ -1223,6 +1223,14 @@ class ChatHandler {
         // so we can attach results back to the originating assistant message's ToolCall
         val toolResults = items.filter { it.role == "tool" }
             .associateBy { it.toolCallId }
+        // A reconnect/rejoin history response can repeat a persisted message row.
+        // Chat's LazyColumn renders domain ids as stable keys (via ChatMessage.uiKey),
+        // so allowing both copies through would crash Compose before either copy
+        // could be reconciled. A domain id identifies one persisted message: retain
+        // its first transcript position while adopting the latest repeated snapshot.
+        // Rows without ids remain independent, and tool/hidden rows keep their
+        // separate handling above/below.
+        val renderedItems = coalesceRenderedHistoryItems(items)
 
         // Accumulator for media markers we find in loaded content — fired AFTER
         // the wholesale `_messages.value = ...` assignment so the ViewModel's
@@ -1240,8 +1248,8 @@ class ChatHandler {
         // silently misses those rows, so a gateway turn's tokens/badges survived
         // only if a content match happened to cover them. See
         // [reconcileLiveIdsToServer].
-        val serverItemIds = items.mapNotNullTo(HashSet()) { it.id }
-        val idRemap = reconcileLiveIdsToServer(items, serverItemIds)
+        val serverItemIds = renderedItems.mapNotNullTo(HashSet()) { it.id }
+        val idRemap = reconcileLiveIdsToServer(renderedItems, serverItemIds)
 
         // Carry CLIENT-ONLY enrichment forward across the reload, keyed by the
         // RECONCILED message id. The server transcript (MessageItem) rebuilds
@@ -1278,7 +1286,7 @@ class ChatHandler {
         // clientOnly bubbles (same exchange, pre-sync copy).
         val syncedRealtimeTurnContents = mutableSetOf<String>()
 
-        val loaded = items.mapNotNull { item ->
+        val loaded = renderedItems.mapNotNull { item ->
             val displayKind = item.displayKind?.trim()?.lowercase()
             if (displayKind == "hidden") return@mapNotNull null
             val role = when {
@@ -1540,6 +1548,34 @@ class ChatHandler {
         }
     }
 
+    /**
+     * Collapse replayed visible history rows by their authoritative message id.
+     *
+     * Replacing the value at its first-seen slot preserves transcript ordering;
+     * the last repeated value wins so a later, more complete snapshot is not lost.
+     * Null ids cannot be proven identical and therefore remain separate rows.
+     */
+    private fun coalesceRenderedHistoryItems(items: List<MessageItem>): List<MessageItem> {
+        val firstSlotById = HashMap<String, Int>()
+        val coalesced = ArrayList<MessageItem>(items.size)
+        for (item in items) {
+            if (renderedRoleOf(item) == null) continue
+            val id = item.id
+            if (id == null) {
+                coalesced += item
+                continue
+            }
+            val existingSlot = firstSlotById[id]
+            if (existingSlot == null) {
+                firstSlotById[id] = coalesced.size
+                coalesced += item
+            } else {
+                coalesced[existingSlot] = item
+            }
+        }
+        return coalesced
+    }
+
     /** One adoptable server row during id reconciliation. `taken` enforces consume-once. */
     private class ReconcileSlot(
         val serverId: String,

app/src/test/kotlin/com/hermesandroid/relay/network/upstream/ChatHandlerTest.kt

@@ -1517,6 +1517,49 @@ class ChatHandlerTest {
         assertEquals(messages.size, messages.map { it.uiKey }.distinct().size)
     }
 
+    @Test
+    fun loadMessageHistory_coalescesReplayedDomainIdWithoutLosingOrderOrContent() {
+        val replayedId = "2c93af28-0b0b-436b-a112-7f164cac931d"
+
+        handler.loadMessageHistory(
+            listOf(
+                MessageItem(
+                    id = "user-1",
+                    role = "user",
+                    content = JsonPrimitive("question"),
+                    timestamp = 1.0,
+                ),
+                MessageItem(
+                    id = replayedId,
+                    role = "assistant",
+                    content = JsonPrimitive("partial answer"),
+                    timestamp = 2.0,
+                ),
+                MessageItem(
+                    id = "system-1",
+                    role = "system",
+                    content = JsonPrimitive("distinct visible content"),
+                    timestamp = 3.0,
+                ),
+                // Rejoin replay of the same persisted message. The latest
+                // snapshot is authoritative, but its first transcript position
+                // and Compose identity must remain stable.
+                MessageItem(
+                    id = replayedId,
+                    role = "assistant",
+                    content = JsonPrimitive("final answer"),
+                    timestamp = 4.0,
+                ),
+            )
+        )
+
+        val messages = handler.messages.value
+        assertEquals(listOf("user-1", replayedId, "system-1"), messages.map { it.id })
+        assertEquals("final answer", messages[1].content)
+        assertEquals("distinct visible content", messages[2].content)
+        assertEquals(messages.size, messages.map { it.uiKey }.distinct().size)
+    }
+
     @Test
     fun loadMessageHistory_secondReloadMatchesByIdAfterReconciliation() {
         // Once the first reload adopts the server id, subsequent reloads match by

build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
-    id("com.android.application") version "9.3.0" apply false
-    id("com.android.library") version "9.3.0" apply false
+    id("com.android.application") version "9.3.1" apply false
+    id("com.android.library") version "9.3.1" apply false
     id("org.jetbrains.kotlin.plugin.compose") version "2.4.10" apply false
     id("org.jetbrains.kotlin.plugin.serialization") version "2.4.10" apply false
 }

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 appVersionName = "1.5.1"
 appVersionCode = "34"
-agp = "9.3.0"
+agp = "9.3.1"
 kotlin = "2.4.10"
 compose-bom = "2026.06.01"
 navigation-compose = "2.9.8"
@@ -15,7 +15,7 @@ security-crypto = "1.1.0"
 tink-android = "1.23.0"
 lifecycle = "2.11.0"
 activity-compose = "1.13.0"
-browser = "1.9.0"
+browser = "1.10.0"
 appcompat = "1.7.1"
 core-ktx = "1.19.0"
 datastore = "1.2.1"

quest/settings.gradle.kts

@@ -5,8 +5,8 @@ pluginManagement {
         gradlePluginPortal()
     }
     plugins {
-        id("com.android.application") version "9.3.0"
-        id("com.android.library") version "9.3.0"
+        id("com.android.application") version "9.3.1"
+        id("com.android.library") version "9.3.1"
         id("org.jetbrains.kotlin.plugin.compose") version "2.4.10"
         id("org.jetbrains.kotlin.plugin.serialization") version "2.4.10"
     }