What does the VARTA error `step_not_found` mean?

HTTP status: 404  ·  Type: invalid_request_error

What it means

The step you referenced isn't present in the agent's step graph.

What causes it

Cause not yet documented as a live /v1 path. The code and its message are defined in the catalogue (backend/app/api/v1/errors.py), but no current /v1 endpoint raises it.

What to do

Not applicable yet.