diff --git a/android-app/app/src/main/java/com/korexlabs/dhinspeccion/domain/MobileWorkflowRules.kt b/android-app/app/src/main/java/com/korexlabs/dhinspeccion/domain/MobileWorkflowRules.kt
new file mode 100644
index 0000000..79cc9a5
--- /dev/null
+++ b/android-app/app/src/main/java/com/korexlabs/dhinspeccion/domain/MobileWorkflowRules.kt
@@ -0,0 +1,54 @@
+package com.korexlabs.dhinspeccion.domain
+
+/**
+ * UX-side mirrors of server invariants used to prevent invalid field actions before a request is sent.
+ * The API remains authoritative; these rules must never be used to weaken backend validation.
+ */
+object MobileWorkflowRules {
+    private val validUrgencies = setOf("URGENT", "NON_URGENT")
+    private val terminalCompanyOutcomes = setOf("SIGNED", "REFUSED")
+
+    fun canStartInspection(status: String): Boolean = status == "PLANNED"
+
+    fun hasDraftAct(statuses: Iterable<String>): Boolean = statuses.any { it == "DRAFT" }
+
+    fun canCreateAct(
+        visitStatus: String,
+        actStatuses: Iterable<String>,
+        hasSelectedInventory: Boolean,
+        urgency: String,
+    ): Boolean =
+        visitStatus == "IN_PROGRESS" &&
+            !hasDraftAct(actStatuses) &&
+            hasSelectedInventory &&
+            urgency in validUrgencies
+
+    fun canCreateFieldInventory(visitStatus: String): Boolean = visitStatus == "IN_PROGRESS"
+
+    fun canRegisterFinding(
+        visitStatus: String,
+        selectedActStatus: String?,
+        inventoryReadyForFinding: Boolean,
+    ): Boolean =
+        visitStatus == "IN_PROGRESS" &&
+            selectedActStatus == "DRAFT" &&
+            inventoryReadyForFinding
+
+    fun canLockAct(actStatus: String?, responsibleDefined: Boolean): Boolean =
+        actStatus == "DRAFT" && responsibleDefined
+
+    fun canSealAct(
+        actStatus: String?,
+        inspectorSigned: Boolean,
+        companyOutcomeStatus: String?,
+    ): Boolean =
+        actStatus == "LOCKED" &&
+            inspectorSigned &&
+            companyOutcomeStatus in terminalCompanyOutcomes
+
+    fun canCloseInspection(visitStatus: String, actStatuses: Iterable<String>): Boolean {
+        if (visitStatus != "IN_PROGRESS") return false
+        val active = actStatuses.filter { it != "CANCELLED" }
+        return active.isNotEmpty() && active.all { it == "SEALED" }
+    }
+}