The core is not. The engine, the desktop app, the platform profiles and the library of tested templates are closed source.
Some parts are public under the MIT license: the template format and its validator (emolysis/template-sdk) and the setup configs for editors and coding agents that support MCP (emolysis/integrations). Runnable sample projects on GitHub, each showing one concrete job end to end with synthetic data, are planned.
The Emolysis name and logo are not covered by the MIT license; the press kit says how they may be used. Templates you write for your own use are yours. See can I write my own templates and the templates and slots docs.