Following some leaks in February, Microsoft officially announced its new low-code programming language for the Power Platform in March. Dubbed Power Fx, this language allow customers of the Power Platform to build and customize application logic in a low-code environment. Power Fx will feel particularly familiar to users of Excel. In May, the company further boosted the language via integration with the OpenAI's GPT-3 models so natural language can be utilized for calculations instead of complex formulas.
Previously, Microsoft had only open-sourced the documentation for Power Fx with plans to do the same for the actual source code by the end of this year. Today, these plans have come to fruition. As noted by WalkingCat (@_h0x0d_) on Twitter, the source code is now available as an open-source repository on GitHub too. The commit for this change was made five hours ago at the time of this writing.
The project is under an MIT license and welcomes contributions as long as you agree to Microsoft's Contributor License Agreement (CLA), which will allow the company to leverage your contributions in its products. If you're interested in contributing to Power Fx, be sure to check out the project on GitHub here.