PlanOperator

id: str = Field(..., description="Stable id: '<subgraph>:<first output tensor name>', or a fallback; operators[].id matches it. For every id_source except node_id, split on the first colon only (tensor names can contain ':'); a node_id id is the opaque AIR node id")

id_source: Annotated[str, _Members('tensor_name', 'tensor_name+ordinal', 'index', 'node_id')] = Field(..., description='How the id was derived; node_id when the stable id would also match another operator, so the id is the AIR node id')

index: int = Field(..., description='Position in execution order')

node_id: str = Field(..., description='AIR node id, which operators[].id also matches')

op_type: str

knobs: dict[str, KnobChoice] = Field(default_factory=dict, description='Resolved choice per knob, for the knobs that exist for this operator', json_schema_extra=_per_knob(_choice_enums))

fixed: dict[str, FixedChoice] = Field(default_factory=dict)

kernel: PlanKernel | None = Field(None, description='The entry chosen among candidate entries, for operators that select one')