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任务状态系统

所有任务共享统一的 TaskPhase 状态机:

pending → processing ⇄ holding → completed → accepted → finished
              ↓                       ↓
           failed ──(retry)──→ processing

pending/holding → blocked(依赖失败)
any non-terminal → cancelled
状态 含义
pending 已创建,等待启动
processing Agent 正在执行
holding 等待子任务 / CEO 回复
completed 执行完毕,等待上级审核
accepted 上级通过(解除下游阻塞)
finished 复盘后归档
failed 执行失败(可重试)
blocked 依赖失败
cancelled 被 CEO 或上级取消

Simple vs Project 任务使用同一套状态机,区别在于自动跳过: - Simplecompleted → 自动 accepted → 自动 finished - Projectcompleted → 手动审核 → EA 复盘 → finished

所有状态变更必须经过 task_lifecycle.pytransition() 方法。