Background Download Skill

中文：后台异步下载技能

• 非阻塞下载，不占用主会话
• 支持断点续传，自动重试
• 通过 Ontology 跟踪状态
• 结果通知到原请求渠道

Asynchronous background file download with:

• Non-blocking: returns immediately to user, downloads in background
• Resumeable: uses curl/wget built-in continue (-c)
• Retry: configurable max retries (default 3)
• Status tracking: all tasks stored in Ontology knowledge graph
• Notification: sends completion/failure notification to original channel
• Housekeeping: heartbeat cleans up zombie tasks, archives old completed tasks

Commands

start - Start a new background download