An agent that has been written to disk (with agent_write()) can be read
back into memory with the agent_read() function. Once the agent has been
read, it may not have a data table associated with it (depending on whether
the keep_tbl option was TRUE or FALSE when writing to disk) but it
should still be able to produce an agent report (by printing the agent to
the console or using get_agent_report()), return an agent x-list (with
get_agent_x_list()), and yield any available data extracts with
get_data_extracts(). Furthermore, all of its validation steps will still be
present (along with results from any interrogation).
agent_read(path)The path to the file that was previously written by
agent_write().
Should the agent possess a table-reading function (can be set any time with
set_read_fn()) or a specific table (settable with set_tbl()) we could use
the interrogate() function again. This is useful for tables that evolve
over time and need periodic data quality assessments with the same validation
steps (and more steps can be added as well).