Short answer: no —

task_run_name

does not support Jinja filters/templating in Prefect 3.x. A string like:

python
@task(task_run_name="refresh-{display_name}")

uses Python

.format(...)

-style substitution, not Jinja, so you can't do things like

|lower

,

replace

, etc. Best option: use a callable for

task_run_name

and transform the parameter there. Example:

python
from prefect import task

def to_kebab(s: str) -> str:
    return s.strip().lower().replace(" ", "-").replace("_", "-")

def task_name(parameters: dict) -> str:
    return f"refresh-{to_kebab(parameters['display_name'])}"

@task(task_run_name=task_name)
def refresh(display_name: str):
    pass

If you want a one-liner:

python
from prefect import task

@task(
    task_run_name=lambda parameters: (
        f"refresh-{parameters['display_name'].strip().lower().replace(' ', '-').replace('_', '-')}"
    )
)
def refresh(display_name: str):
    pass

A few notes: - String templates support basic field access like

{display_name}

- They can also handle some normal Python format spec behavior - They do not support filters, arbitrary expressions, or case conversion So for kebab-case, a callable is the right approach. Relevant docs/source: - Prefect docs - Prefect task naming is implemented with Python string formatting / callable support in Prefect 3.x source: Prefect GitHub If you want, I can also give you a more robust

to_kebab()

helper that handles multiple spaces, punctuation, and unicode more cleanly.