It is a combination of Hermes agent as the orchestrator and a custom extractor script (that uses qwen or any other LLM) that runs every 2 mins (on Mac via launchd). I had the code + skill written by Hermes.

The beauty of it is that Hermes itself has a cron too - every 4h Hermes will wake up and check if the email ingestion is working fine. If not, it will fix it. Funnily this is one of the most robust setups I've seen in a while, it is like having your own little DevOps waking up at night, fixing the infra when needed.

I did something similiar on OpenClaw running on a Mac Mini. The script uses Applescript to check Apple Mail for new emails and summarize them, and also add the summary to Sqlite. Not quite smart yet to uncover and track large mail threads, with context.