Loop Workflow

from definable.agent import Agent
from definable.agent.workflow import Workflow, Loop, Step

generator = Agent(model="gpt-4o", instructions="Generate content based on feedback.")
evaluator = Agent(model="gpt-4o", instructions="Evaluate quality. Say APPROVED if it meets standards.")

workflow = Workflow(
    name="refinement",
    steps=[
        Loop(
            name="improve",
            steps=[
                Step(name="generate", agent=generator),
                Step(name="evaluate", agent=evaluator),
            ],
            end_condition=lambda outputs: any(
                "APPROVED" in (o.content or "") for o in outputs
            ),
            max_iterations=5,
        ),
    ],
)

from definable.agent.workflow import LoopIterationEvent

workflow.events.on(LoopIterationEvent, lambda e: print(f"Iteration {e.iteration}/{e.max_iterations}"))