Homing Pigeon
Self-hosted agent that runs signed jobs your cloud SI sends by email.
...Homing Pigeon fixes that: tell your SI to complete a task and it will do it on your machine (Linux/macOS/FreeBSD/Windows), and the results return so the SI can iterate: run the tests, read the failure, fix, repeat. Think "GitHub self-hosted runner, but the control plane is email." Python 3.9+, standard library only, no dependencies. Jobs are HMAC-SHA-384-signed JSON carried by email (protocol v2); a local Oracle model reviews what comes back before your SI sees it. By design it executes signed jobs with the runner account's privileges: run it on a machine you can afford to lose.