Microsoft’s blog post announcing its plans also says that “In addition to the public, several organizations have already expressed interest in contributing to ChakraCore–among many others, we look forward to working with Intel, AMD, and NodeSource as we develop this community.”
Microsoft’s won’t be open sourcing other pieces of Chakra, including the COM diagnostic APIs and the private bindings to the browser and the Universal Windows Platform. Though the open sourced ChakraCore will have performance and capabilities, including asm.js and SIMD support, as well as cutting-edge support for new ECMAScript 2015 language features.
From Microsoft’s blog post:
“ChakraCore is already designed to fit into any application stack that calls for a fast, scalable, and lightweight engine. We intend to make it even more versatile over time, both within and beyond the Windows ecosystem. While the initial January release will be Windows-only, we are committed to bringing ChakraCore to other platforms in the future. We’d invite developers to help us in this pursuit by letting us know which other platforms they’d like to see ChakraCore supported on to help us prioritize future investments, or even by helping port it to the platform of their choice.”