wx-win-agent/docs/validation/evidence/WebUI-MCP-single-client-2026-09-19/broadcast.request.json

{"kind":"broadcast-text","accountId":"a2e8a1eaab7fd5fbd3806525c0d9cce750c28f4efb8e7cfcabc9e3e8660e0277","targets":["session_item_文件传输助手","session_item_吉祥三宝"],"text":"[WxAgent验证] 单 Client 多对象广播修复验收 20260919-0412","idempotencyKey":"wxagent-single-20260919-broadcast-final-001","confirmed":true,"stopOnError":true}