diff --git a/src/domain/bpmn-parser.ts b/src/domain/bpmn-parser.ts
index d8d3c3b..35e044f 100644
--- a/src/domain/bpmn-parser.ts
+++ b/src/domain/bpmn-parser.ts
@@ -64,49 +64,58 @@ export function parseBpmnXml(xml: string): ProcessGraph {
   const flows = new Map<string, ProcessGraphFlow>()
   const startEventIds: BpmnElementId[] = []
 
-  // Buscar el proceso principal (puede estar anidado bajo definitions)
-  const processEl = doc.querySelector('[*|localName="process"], process')
-  if (!processEl) {
+  // Buscar TODOS los procesos del documento. Las colaboraciones tienen múltiples
+  // <bpmn:process> como hijos directos de <definitions>, uno por pool.
+  const definitions = doc.documentElement
+  const processEls = Array.from(definitions.children).filter(
+    (el) => normalizeLocalName(el.tagName) === 'process'
+  )
+
+  if (processEls.length === 0) {
     throw new BpmnParseError('No se encontró un elemento <process> en el BPMN')
   }
 
-  // Iterar todos los hijos directos del proceso
-  for (const child of Array.from(processEl.children)) {
-    const local = normalizeLocalName(child.tagName)
-    const type: BpmnNodeType = TAG_TO_TYPE[local] ?? 'unknown'
+  // Parsear cada proceso y acumular nodos y flujos en mapas compartidos
+  for (const processEl of processEls) {
+    for (const child of Array.from(processEl.children)) {
+      const local = normalizeLocalName(child.tagName)
+      const type: BpmnNodeType = TAG_TO_TYPE[local] ?? 'unknown'
 
-    if (local === 'sequenceflow') {
-      const flow: ProcessGraphFlow = {
-        id: getAttr(child, 'id'),
-        sourceRef: getAttr(child, 'sourceRef'),
-        targetRef: getAttr(child, 'targetRef'),
-        name: getAttr(child, 'name') || undefined,
+      if (local === 'sequenceflow') {
+        const flow: ProcessGraphFlow = {
+          id: getAttr(child, 'id'),
+          sourceRef: getAttr(child, 'sourceRef'),
+          targetRef: getAttr(child, 'targetRef'),
+          name: getAttr(child, 'name') || undefined,
+        }
+        if (flow.id) flows.set(flow.id, flow)
+        continue
       }
-      if (flow.id) flows.set(flow.id, flow)
-      continue
+
+      if (type === 'unknown') continue
+
+      const id = getAttr(child, 'id')
+      if (!id) continue
+
+      const node: ProcessGraphNode = {
+        id,
+        name: getAttr(child, 'name'),
+        type,
+        outgoing: parseFlowRefs(child, 'outgoing'),
+        incoming: parseFlowRefs(child, 'incoming'),
+      }
+
+      nodes.set(id, node)
+      if (type === 'startEvent') startEventIds.push(id)
     }
-
-    if (type === 'unknown') continue
-
-    const id = getAttr(child, 'id')
-    if (!id) continue
-
-    const node: ProcessGraphNode = {
-      id,
-      name: getAttr(child, 'name'),
-      type,
-      outgoing: parseFlowRefs(child, 'outgoing'),
-      incoming: parseFlowRefs(child, 'incoming'),
-    }
-
-    nodes.set(id, node)
-    if (type === 'startEvent') startEventIds.push(id)
   }
 
   if (nodes.size === 0) {
     throw new BpmnParseError('El proceso no contiene elementos reconocibles')
   }
 
+  // Pools de soporte (SAP, bandeja manual, etc.) pueden no tener StartEvent propio —
+  // exigimos al menos uno entre todos los pools del diagrama.
   if (startEventIds.length === 0) {
     throw new BpmnParseError('El proceso no tiene evento de inicio (StartEvent)')
   }
diff --git a/tests/integration/bpmn-collaboration.test.ts b/tests/integration/bpmn-collaboration.test.ts
new file mode 100644
index 0000000..06d1f8b
--- /dev/null
+++ b/tests/integration/bpmn-collaboration.test.ts
@@ -0,0 +1,42 @@
+import { describe, it, expect } from 'vitest'
+import { readFileSync } from 'fs'
+import { resolve } from 'path'
+import { parseBpmnXml, extractActivityElements } from '@/domain/bpmn-parser'
+
+describe('Colaboración multi-pool', () => {
+  const xml = readFileSync(resolve(__dirname, '../proceso_carga_facturas.bpmn'), 'utf-8')
+
+  it('parsea sin error', () => {
+    expect(() => parseBpmnXml(xml)).not.toThrow()
+  })
+
+  it('extrae actividades de TODOS los pools, no solo el primero', () => {
+    const graph = parseBpmnXml(xml)
+    const acts = extractActivityElements(graph)
+    const ids = acts.map((a) => a.bpmnElementId)
+
+    // Pool 1 — IKData (OCR)
+    expect(ids).toContain('Task_OCR')
+    expect(ids).toContain('Task_GenerarPayload')
+
+    // Pool 2 — Robot RPA (proceso principal)
+    expect(ids).toContain('Task_LeerPayload')
+    expect(ids).toContain('Task_AbrirSAP')
+    expect(ids).toContain('Task_GuardarFactura')
+    expect(ids).toContain('Task_DerivarBandeja')
+
+    // Pool 3 — SAP (pool de soporte sin StartEvent propio)
+    expect(ids).toContain('Task_RecibirFactura')
+
+    // Pool 4 — Bandeja manual (pool de soporte sin StartEvent propio)
+    expect(ids).toContain('Task_RevisionManual')
+
+    expect(acts.length).toBeGreaterThanOrEqual(14)
+  })
+
+  it('tiene StartEvents de los pools principales aunque otros pools no tengan', () => {
+    const graph = parseBpmnXml(xml)
+    expect(graph.startEventIds).toContain('StartEvent_IKData')
+    expect(graph.startEventIds).toContain('StartEvent_Robot')
+  })
+})