Repo: https://github.com/ontoplano/ontoplano
Demo: https://demo.ontoplano.com/
modular (you can deactivate features you don't want to use)
integrable (Webhooks, REST API, MCP server)
Just one place to keep all your personal organisation data, easily integrable, in case you want to do something else with this data.
Sure, but “you can script it yourself” is a very different value proposition from the software actually providing the feature. By that standard, any sufficiently extensible application can “do” almost anything. And Ontoplano itself goes into that category, since it comes with a REST API and webhooks, making it easily scriptable too.