2025-02-28: Entry to Hiroshima AI sandbox.
2023-04-01: Closed Publishing as Sample Version 0.401.
2022-05-12: Updated Temporary Version 0.4.
2021-08: Closed Publishing at Website here; Version 0.3.
2020-06: Published to a Closed Group on Slack; Version 0.2.
around 2018: Shared with Closed Notes; Version 0.1.