missing-operator-stop

name	missing_operator_stop
description	用于 Workflow Planning 阶段的占位算子。当前 Skill 库不存在满足用户需求的业务 Skill 时，使用本算子保持 DAG 数据流完整，等待后续生成真实 Skill 后替换。
name_zh	DAG占位算子
input_params	[{"name":"input","type":"string","required":true,"description":"引用上游节点输出"},{"name":"expected_skill","type":"string","required":false,"description":"需要补齐的算子名称"},{"name":"capability","type":"string","required":true,"description":"需要补齐的算子能力描述"},{"name":"reason","type":"string","required":false,"description":"需要补齐的算子无法满足用户需求的原因描述"}]
output_params	[{"name":"output","type":"string","description":"供下游节点引用的输出占位参数"}]
tag	占位
node_category	system
publisher	COMMUNITY

missing_operator_stop

用于作为 DAG 的占位节点，当用户需要的流程中，存在系统不具备的算子能力时，声明本占位算子，承接上游输出作为本占位节点输入，并向下游节点暴露 output 输出槽位供引用，保证DAG结构完整。