How to skip tasks on Airflow?

I'm trying to understand whether Airflow supports skipping tasks in a DAG for ad-hoc executions?

Lets say my DAG graph look like this: task1 > task2 > task3 > task4

And I would like to start my DAG manually from task3, what is the best way of doing that?

I've read about ShortCircuitOperator, but I'm looking for more ad-hoc solution which can apply once the execution is triggered.

Thanks!

You can incorporate the SkipMixin that the ShortCircuitOperator uses under the hood to skip downstream tasks.

from airflow.models import BaseOperator, SkipMixin
from airflow.utils.decorators import apply_defaults


class mySkippingOperator(BaseOperator, SkipMixin)
    
    @apply_defaults
    def __init__(self,
                 condition,
                 *args,
                 **kwargs):
        super().__init__(*args, **kwargs)
        self.condition = condition
    
    def execute(self, context):

        if self.condition:
           self.log.info('Proceeding with downstream tasks...')
           return

        self.log.info('Skipping downstream tasks...')

        downstream_tasks = context['task'].get_flat_relatives(upstream=False)
       
        self.log.debug("Downstream task_ids %s", downstream_tasks)

        if downstream_tasks:
            self.skip(context['dag_run'], context['ti'].execution_date, downstream_tasks)

        self.log.info("Done.")