Additionally, when I run

invoke

or

elt

with this tap, I get

{"type": "STATE", "value": {}}

for the output. Is

value

the records to be added?

No, that's the tap outputting state: https://github.com/singer-io/getting-started/blob/master/docs/CONFIG_AND_STATE.md#state-file / https://meltano.com/docs/command-line-interface.html#pipeline-state