diff --git a/.gitignore b/.gitignore
index 7231c09a..9a4a5f3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ eclipse
 kotlin-js-store/
 
 geary-benchmarks/.results
+/truckconfig.json
diff --git a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/ActionGroup.kt b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/ActionGroup.kt
index 08247769..7610f4aa 100644
--- a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/ActionGroup.kt
+++ b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/ActionGroup.kt
@@ -2,6 +2,7 @@ package com.mineinabyss.geary.actions
 
 import com.mineinabyss.geary.actions.actions.EmitEventAction
 import com.mineinabyss.geary.actions.actions.EnsureAction
+import com.mineinabyss.geary.actions.event_binds.ActionOnFail
 import com.mineinabyss.geary.actions.event_binds.ActionRegister
 import com.mineinabyss.geary.actions.event_binds.ActionWhen
 import com.mineinabyss.geary.modules.geary
@@ -15,6 +16,7 @@ class ActionEntry(
     val action: Action,
     val conditions: List<EnsureAction>?,
     val register: String?,
+    val onFail: ActionGroup?,
 )
 
 @Serializable(with = ActionGroup.Serializer::class)
@@ -33,19 +35,21 @@ class ActionGroup(
                 if (entry.register != null)
                     context.register(entry.register, returned)
             } catch (e: ActionsCancelledException) {
+                entry.onFail?.execute(context)
                 return
             }
         }
     }
 
-    object Serializer : InnerSerializer<List<SerializedComponents>, ActionGroup>(
+    class Serializer : InnerSerializer<List<SerializedComponents>, ActionGroup>(
         serialName = "geary:action_group",
         inner = ListSerializer(
             PolymorphicListAsMapSerializer.ofComponents(
                 PolymorphicListAsMapSerializer.Config(
                     customKeys = mapOf(
-                        "when" to ActionWhen.serializer(),
-                        "register" to ActionRegister.serializer()
+                        "when" to { ActionWhen.serializer() },
+                        "register" to { ActionRegister.serializer() },
+                        "onFail" to { ActionOnFail.serializer() }
                     )
                 )
             )
@@ -56,10 +60,12 @@ class ActionGroup(
                 var action: Action? = null
                 var condition: List<EnsureAction>? = null
                 var register: String? = null
+                var onFail: ActionGroup? = null
                 components.forEach { comp ->
                     when {
                         comp is ActionWhen -> condition = comp.conditions
                         comp is ActionRegister -> register = comp.register
+                        comp is ActionOnFail -> onFail = comp.action
                         action != null -> geary.logger.w { "Multiple actions defined in one block!" }
                         else -> action = EmitEventAction.wrapIfNotAction(comp)
                     }
@@ -68,7 +74,8 @@ class ActionGroup(
                 ActionEntry(
                     action = action!!,
                     conditions = condition,
-                    register = register
+                    register = register,
+                    onFail = onFail
                 )
             }
             ActionGroup(actions)
diff --git a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/actions/EnsureAction.kt b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/actions/EnsureAction.kt
index c7031d6c..5b673a5e 100644
--- a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/actions/EnsureAction.kt
+++ b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/actions/EnsureAction.kt
@@ -1,10 +1,6 @@
 package com.mineinabyss.geary.actions.actions
 
-import com.mineinabyss.geary.actions.Action
-import com.mineinabyss.geary.actions.ActionsCancelledException
-import com.mineinabyss.geary.actions.ActionGroupContext
-import com.mineinabyss.geary.actions.Condition
-import com.mineinabyss.geary.actions.event_binds.EventBind
+import com.mineinabyss.geary.actions.*
 import com.mineinabyss.geary.helpers.componentId
 import com.mineinabyss.geary.serialization.serializers.InnerSerializer
 import com.mineinabyss.geary.serialization.serializers.PolymorphicListAsMapSerializer
@@ -23,7 +19,9 @@ class EnsureAction(
         flat.forEach { (id, data) ->
             when (data) {
                 is Condition -> with(data) {
-                    if(!execute()) throw ActionsCancelledException()
+                    if(!execute()) {
+                        throw ActionsCancelledException()
+                    }
                 }
                 else -> entity.emit(id, data) //TODO use geary condition system if we get one
             }
diff --git a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/event_binds/EntityObservers.kt b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/event_binds/EntityObservers.kt
index 14286b36..6bb5574b 100644
--- a/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/event_binds/EntityObservers.kt
+++ b/addons/geary-actions/src/commonMain/kotlin/com/mineinabyss/geary/actions/event_binds/EntityObservers.kt
@@ -17,7 +17,7 @@ class EntityObservers(
         serialName = "geary:observe",
         inner = MapSerializer(
             SerializableComponentId.serializer(),
-            ActionGroup.Serializer
+            ActionGroup.serializer()
         ),
         inverseTransform = { TODO() },
         transform = {
@@ -33,7 +33,7 @@ class EntityObservers(
 
 @Serializable(with = ActionWhen.Serializer::class)
 class ActionWhen(val conditions: List<EnsureAction>) {
-    object Serializer : InnerSerializer<List<EnsureAction>, ActionWhen>(
+    class Serializer : InnerSerializer<List<EnsureAction>, ActionWhen>(
         serialName = "geary:when",
         inner = ListSerializer(EnsureAction.serializer()),
         inverseTransform = ActionWhen::conditions,
@@ -44,3 +44,13 @@ class ActionWhen(val conditions: List<EnsureAction>) {
 @JvmInline
 @Serializable
 value class ActionRegister(val register: String)
+
+@Serializable(with = ActionOnFail.Serializer::class)
+class ActionOnFail(val action: ActionGroup) {
+    class Serializer : InnerSerializer<ActionGroup, ActionOnFail>(
+        serialName = "geary:on_fail",
+        inner = ActionGroup.Serializer(),
+        inverseTransform = ActionOnFail::action,
+        transform = ::ActionOnFail
+    )
+}
diff --git a/addons/geary-serialization/src/commonMain/kotlin/com/mineinabyss/geary/serialization/serializers/PolymorphicListAsMapSerializer.kt b/addons/geary-serialization/src/commonMain/kotlin/com/mineinabyss/geary/serialization/serializers/PolymorphicListAsMapSerializer.kt
index 23243083..0b3187b1 100644
--- a/addons/geary-serialization/src/commonMain/kotlin/com/mineinabyss/geary/serialization/serializers/PolymorphicListAsMapSerializer.kt
+++ b/addons/geary-serialization/src/commonMain/kotlin/com/mineinabyss/geary/serialization/serializers/PolymorphicListAsMapSerializer.kt
@@ -49,7 +49,7 @@ open class PolymorphicListAsMapSerializer<T : Any>(
                     }
 
                     else -> {
-                        val componentSerializer = config.customKeys[key] ?: findSerializerFor(compositeDecoder.serializersModule, namespaces, key)
+                        val componentSerializer = config.customKeys[key]?.invoke() ?: findSerializerFor(compositeDecoder.serializersModule, namespaces, key)
                             .getOrElse {
                                 if (config.onMissingSerializer != OnMissing.IGNORE) {
                                     config.whenComponentMalformed(key)
@@ -122,7 +122,7 @@ open class PolymorphicListAsMapSerializer<T : Any>(
         val onMissingSerializer: OnMissing = OnMissing.WARN,
         val skipMalformedComponents: Boolean = true,
         val whenComponentMalformed: (String) -> Unit = {},
-        val customKeys: Map<String, KSerializer<out T>> = mapOf(),
+        val customKeys: Map<String, () -> KSerializer<out T>> = mapOf(),
     )
 
     companion object {