diff --git a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/CompleteTaskDialog.kt b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/CompleteTaskDialog.kt
index 4c8703d..98a0a62 100644
--- a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/CompleteTaskDialog.kt
+++ b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/CompleteTaskDialog.kt
@@ -39,6 +39,7 @@ import com.tt.honeyDue.platform.rememberCameraPicker
 import com.tt.honeyDue.platform.HapticFeedbackType
 import com.tt.honeyDue.platform.rememberHapticFeedback
 import com.tt.honeyDue.platform.rememberImageBitmap
+import com.tt.honeyDue.ui.haptics.Haptics
 import kotlinx.datetime.*
 import org.jetbrains.compose.resources.stringResource
 
@@ -350,6 +351,7 @@ fun CompleteTaskDialog(
         confirmButton = {
             Button(
                 onClick = {
+                    Haptics.success() // P5 Stream S — task completion haptic
                     // Get current date in ISO format
                     val currentDate = getCurrentDateTime()
 
diff --git a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/ErrorDialog.kt b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/ErrorDialog.kt
index 5cced02..a9d620e 100644
--- a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/ErrorDialog.kt
+++ b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/ErrorDialog.kt
@@ -7,7 +7,9 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.graphics.Color
+import com.tt.honeyDue.ui.haptics.Haptics
 
 /**
  * Reusable error dialog component that shows network errors with retry/cancel options
@@ -28,6 +30,8 @@ fun ErrorDialog(
     retryButtonText: String = "Try Again",
     dismissButtonText: String = "Cancel"
 ) {
+    // P5 Stream S — error haptic when the dialog appears
+    LaunchedEffect(message) { Haptics.error() }
     AlertDialog(
         onDismissRequest = onDismiss,
         title = {
@@ -46,6 +50,7 @@ fun ErrorDialog(
         confirmButton = {
             Button(
                 onClick = {
+                    Haptics.light() // P5 Stream S — primary-tap haptic on retry
                     onDismiss()
                     onRetry()
                 },
diff --git a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/common/ErrorCard.kt b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/common/ErrorCard.kt
index fb51a18..a061782 100644
--- a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/common/ErrorCard.kt
+++ b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/components/common/ErrorCard.kt
@@ -4,8 +4,10 @@ import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.*
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import com.tt.honeyDue.ui.haptics.Haptics
 import org.jetbrains.compose.ui.tooling.preview.Preview
 
 @Composable
@@ -14,6 +16,8 @@ fun ErrorCard(
     modifier: Modifier = Modifier
 ) {
     if (message.isNotEmpty()) {
+        // P5 Stream S — form-validation / network error haptic
+        LaunchedEffect(message) { Haptics.error() }
         Card(
             colors = CardDefaults.cardColors(
                 containerColor = MaterialTheme.colorScheme.errorContainer
diff --git a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/screens/CompleteTaskScreen.kt b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/screens/CompleteTaskScreen.kt
index ff9516b..970a5f3 100644
--- a/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/screens/CompleteTaskScreen.kt
+++ b/composeApp/src/commonMain/kotlin/com/tt/honeyDue/ui/screens/CompleteTaskScreen.kt
@@ -29,6 +29,7 @@ import com.tt.honeyDue.models.TaskCompletionCreateRequest
 import com.tt.honeyDue.models.ContractorSummary
 import com.tt.honeyDue.network.ApiResult
 import com.tt.honeyDue.platform.*
+import com.tt.honeyDue.ui.haptics.Haptics
 import com.tt.honeyDue.ui.theme.*
 import com.tt.honeyDue.viewmodel.ContractorViewModel
 import org.jetbrains.compose.resources.stringResource
@@ -383,6 +384,7 @@ fun CompleteTaskScreen(
                 OrganicPrimaryButton(
                     text = stringResource(Res.string.completions_complete_button),
                     onClick = {
+                        Haptics.success() // P5 Stream S — task completion haptic
                         isSubmitting = true
                         val notesWithContractor = buildString {
                             selectedContractor?.let {