diff --git a/nuxt4/app/components/lotes/Trazabilidad.vue b/nuxt4/app/components/lotes/Trazabilidad.vue
index 0f9bb06..2ea062f 100644
--- a/nuxt4/app/components/lotes/Trazabilidad.vue
+++ b/nuxt4/app/components/lotes/Trazabilidad.vue
@@ -38,7 +38,10 @@
         </div>
       </div>
 
-      <!-- Árbol de Trazabilidad -->
+      <!-- Grafo de Trazabilidad -->
+      <TrazabilidadGraph v-if="trazabilidad" :historial="trazabilidad.historial" />
+
+      <!-- Árbol de Trazabilidad (texto) -->
       <div class="space-y-2">
         <h4 class="font-semibold text-lg">Historial</h4>
         <div class="space-y-1">
@@ -107,6 +110,7 @@
 </template>
 
 <script setup lang="ts">
+import TrazabilidadGraph from './TrazabilidadGraph.vue'
 import type { TrazabilidadRow } from '~/composables/useLotes'
 
 const props = defineProps<{
diff --git a/nuxt4/app/components/lotes/TrazabilidadGraph.vue b/nuxt4/app/components/lotes/TrazabilidadGraph.vue
new file mode 100644
index 0000000..3426b4f
--- /dev/null
+++ b/nuxt4/app/components/lotes/TrazabilidadGraph.vue
@@ -0,0 +1,233 @@
+<template>
+  <div class="space-y-3">
+    <div class="flex items-center justify-between">
+      <div>
+        <h4 class="text-lg font-semibold">Grafo de trazabilidad</h4>
+        <p class="text-sm text-gray-500">Relaciones insumo → resultado por nivel de profundidad</p>
+      </div>
+      <UBadge color="blue" variant="subtle" v-if="nodes.length">
+        {{ nodes.length }} nodos · {{ edges.length }} aristas
+      </UBadge>
+    </div>
+
+    <div class="relative w-full overflow-x-auto">
+      <svg
+        :width="svgWidth"
+        :height="svgHeight"
+        class="min-w-full bg-gradient-to-b from-white to-gray-50 rounded-lg border"
+      >
+        <!-- Aristas -->
+        <g stroke="#CBD5E1" stroke-width="2">
+          <line
+            v-for="edge in edges"
+            :key="`${edge.from}-${edge.to}`"
+            :x1="edge.fromPos.x"
+            :y1="edge.fromPos.y"
+            :x2="edge.toPos.x"
+            :y2="edge.toPos.y"
+            stroke-linecap="round"
+            class="transition-opacity duration-200"
+          />
+        </g>
+
+        <!-- Nodos -->
+        <g>
+          <g
+            v-for="node in nodes"
+            :key="node.id"
+            class="transition-transform duration-200"
+          >
+            <rect
+              :x="node.x - nodeBox.width / 2"
+              :y="node.y - nodeBox.height / 2"
+              :width="nodeBox.width"
+              :height="nodeBox.height"
+              rx="12"
+              :fill="getNodeFill(node.tipo)"
+              stroke="#0F172A"
+              stroke-opacity="0.05"
+            />
+            <text
+              :x="node.x"
+              :y="node.y - 10"
+              text-anchor="middle"
+              class="font-medium"
+              fill="#0F172A"
+            >
+              {{ node.label }}
+            </text>
+            <text
+              :x="node.x"
+              :y="node.y + 10"
+              text-anchor="middle"
+              class="text-[11px]"
+              fill="#334155"
+            >
+              {{ getTipoLabel(node.tipo) }}
+            </text>
+            <text
+              v-if="node.cantidad_kg"
+              :x="node.x"
+              :y="node.y + 26"
+              text-anchor="middle"
+              class="text-[10px]"
+              fill="#475569"
+            >
+              {{ node.cantidad_kg.toLocaleString('es-AR') }} kg
+            </text>
+          </g>
+        </g>
+      </svg>
+    </div>
+
+    <div class="flex flex-wrap gap-2 text-xs text-gray-600">
+      <span class="inline-flex items-center gap-1">
+        <span class="w-3 h-3 rounded-sm" :style="{ background: getNodeFill('uva') }"></span> Uva
+      </span>
+      <span class="inline-flex items-center gap-1">
+        <span class="w-3 h-3 rounded-sm" :style="{ background: getNodeFill('despulpado_primera') }"></span> Despulpado
+      </span>
+      <span class="inline-flex items-center gap-1">
+        <span class="w-3 h-3 rounded-sm" :style="{ background: getNodeFill('oreado') }"></span> Oreado / Presecado
+      </span>
+      <span class="inline-flex items-center gap-1">
+        <span class="w-3 h-3 rounded-sm" :style="{ background: getNodeFill('reposo') }"></span> Reposo
+      </span>
+      <span class="inline-flex items-center gap-1">
+        <span class="w-3 h-3 rounded-sm" :style="{ background: getNodeFill('secado') }"></span> Secado / mezcla
+      </span>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import type { TrazabilidadRow } from '~/composables/useLotes'
+
+const props = defineProps<{
+  historial: TrazabilidadRow[]
+}>()
+
+const paddingX = 80
+const paddingY = 60
+const levelGap = 140
+const nodeBox = { width: 180, height: 64 }
+
+type GraphNode = {
+  id: string
+  label: string
+  tipo: string
+  cantidad_kg: number | null
+  depth: number
+  x: number
+  y: number
+}
+
+const groupedByDepth = computed(() => {
+  const levels = new Map<number, TrazabilidadRow[]>()
+  for (const row of props.historial) {
+    const arr = levels.get(row.profundidad) || []
+    arr.push(row)
+    levels.set(row.profundidad, arr)
+  }
+  return levels
+})
+
+const nodes = computed<GraphNode[]>(() => {
+  const result: GraphNode[] = []
+  const levels = groupedByDepth.value
+  if (levels.size === 0) return result
+  const maxCount = Math.max(...Array.from(levels.values()).map((l) => l.length))
+
+  for (const [depth, rows] of Array.from(levels.entries()).sort((a, b) => a[0] - b[0])) {
+    const count = rows.length
+    const width = Math.max(maxCount * nodeBox.width * 1.2, 400)
+    const spacing = width / (count + 1)
+    rows.forEach((row, idx) => {
+      result.push({
+        id: row.lote_id,
+        label: row.codigo || row.lote_id.slice(0, 8),
+        tipo: row.tipo,
+        cantidad_kg: row.cantidad_kg,
+        depth,
+        x: paddingX + spacing * (idx + 1),
+        y: paddingY + depth * levelGap,
+      })
+    })
+  }
+
+  return result
+})
+
+const nodeById = computed(() => {
+  const map = new Map<string, GraphNode>()
+  for (const n of nodes.value) {
+    map.set(n.id, n)
+  }
+  return map
+})
+
+const edges = computed(() => {
+  const list: {
+    from: string
+    to: string
+    fromPos: { x: number; y: number }
+    toPos: { x: number; y: number }
+  }[] = []
+
+  for (const row of props.historial) {
+    if (!row.parent_lote_id) continue
+    const fromNode = nodeById.value.get(row.parent_lote_id)
+    const toNode = nodeById.value.get(row.lote_id)
+    if (fromNode && toNode) {
+      list.push({
+        from: fromNode.id,
+        to: toNode.id,
+        fromPos: { x: fromNode.x, y: fromNode.y + nodeBox.height / 2 },
+        toPos: { x: toNode.x, y: toNode.y - nodeBox.height / 2 },
+      })
+    }
+  }
+
+  return list
+})
+
+const svgWidth = computed(() => {
+  if (!nodes.value.length) return 600
+  const maxX = Math.max(...nodes.value.map((n) => n.x + nodeBox.width / 2), 600)
+  return maxX + paddingX
+})
+
+const svgHeight = computed(() => {
+  if (!nodes.value.length) return paddingY * 2 + nodeBox.height
+  const maxDepth = Math.max(...nodes.value.map((n) => n.depth), 0)
+  return paddingY * 2 + maxDepth * levelGap + nodeBox.height
+})
+
+const getNodeFill = (tipo: string): string => {
+  const palette: Record<string, string> = {
+    uva: '#F3E8FF',
+    despulpado_primera: '#DCFCE7',
+    despulpado_segunda: '#FEF9C3',
+    despulpado_rechazos: '#FEE2E2',
+    oreado: '#FFEDD5',
+    presecado: '#FDE68A',
+    reposo: '#DBEAFE',
+    secado: '#D1FAE5',
+  }
+  return palette[tipo] || '#E2E8F0'
+}
+
+const getTipoLabel = (tipo: string) => {
+  const map: Record<string, string> = {
+    uva: 'Uva',
+    despulpado_primera: 'Despulpado 1ra',
+    despulpado_segunda: 'Despulpado 2da',
+    despulpado_rechazos: 'Rechazos',
+    oreado: 'Oreado',
+    presecado: 'Presecado',
+    reposo: 'Reposo',
+    secado: 'Secado',
+  }
+  return map[tipo] || tipo
+}
+</script>
diff --git a/nuxt4/app/composables/useLotes.ts b/nuxt4/app/composables/useLotes.ts
index 65cc72d..014b714 100644
--- a/nuxt4/app/composables/useLotes.ts
+++ b/nuxt4/app/composables/useLotes.ts
@@ -28,6 +28,7 @@ export interface TrazabilidadRow {
   operacion_id: string | null
   operacion_tipo: string | null
   profundidad: number
+  parent_lote_id: string | null
 }
 
 export const useLotes = () => {
diff --git a/nuxt4/server/api/lotes/[id]/trazabilidad.get.ts b/nuxt4/server/api/lotes/[id]/trazabilidad.get.ts
index da354a1..677e7f8 100644
--- a/nuxt4/server/api/lotes/[id]/trazabilidad.get.ts
+++ b/nuxt4/server/api/lotes/[id]/trazabilidad.get.ts
@@ -18,6 +18,14 @@ export default defineEventHandler(async (event) => {
       })
     }
 
+    const isUuid = /^[0-9a-fA-F-]{36}$/.test(id)
+    if (!isUuid) {
+      throw createError({
+        statusCode: 400,
+        statusMessage: 'ID de lote inválido',
+      })
+    }
+
     // Obtener trazabilidad completa
     const trazabilidad = await getTrazabilidad(id)
 
diff --git a/nuxt4/server/database/01_schema.sql b/nuxt4/server/database/01_schema.sql
index 8af8c82..24bdfb7 100644
--- a/nuxt4/server/database/01_schema.sql
+++ b/nuxt4/server/database/01_schema.sql
@@ -134,7 +134,8 @@ RETURNS TABLE (
   cantidad_kg   NUMERIC,
   operacion_id  UUID,
   operacion_tipo TEXT,
-  profundidad   INTEGER
+  profundidad   INTEGER,
+  parent_lote_id UUID
 ) AS $$
 BEGIN
   RETURN QUERY
@@ -147,7 +148,8 @@ BEGIN
       l.cantidad_kg,
       ol.operacion_id,
       o.tipo AS operacion_tipo,
-      0 AS profundidad
+      0 AS profundidad,
+      NULL::UUID AS parent_lote_id
     FROM lotes l
     LEFT JOIN operacion_lotes ol ON ol.lote_id = l.id AND ol.rol = 'output'
     LEFT JOIN operaciones o ON o.id = ol.operacion_id
@@ -163,7 +165,8 @@ BEGIN
       l2.cantidad_kg,
       ol2.operacion_id,
       o2.tipo AS operacion_tipo,
-      t.profundidad + 1
+      t.profundidad + 1,
+      t.lote_id AS parent_lote_id
     FROM trazabilidad t
     JOIN operacion_lotes ol_in
       ON ol_in.operacion_id = t.operacion_id
diff --git a/nuxt4/server/utils/queries.ts b/nuxt4/server/utils/queries.ts
index 32913ce..fc127b6 100644
--- a/nuxt4/server/utils/queries.ts
+++ b/nuxt4/server/utils/queries.ts
@@ -38,6 +38,7 @@ export interface TrazabilidadRow {
   operacion_id: string | null
   operacion_tipo: string | null
   profundidad: number
+  parent_lote_id: string | null
 }
 
 export interface LoteConOrigen extends Lote {