• Rewritten on top of the latest spec update to ES6 Module Loader
• Comprehensive circular references support for ES6, AMD, CommonJS and System.register compilation
• System.register compilation support
• Bundles now run instantiate
• Any module with named defines will take the value of its last named define
• data-main, data-baseurl script helpers
• data-config "json" config loading
• System.config() helper
• Generalised meta system with System.meta and "metaname metavalue"; at top of source file
• Shim config running through meta system
• Shim init support
• Formats rewritten for circular dependency support, see https://github.com/systemjs/systemjs/wiki/Creating-a-Custom-Format-Extension
• Plugin API instantiate support, see - https://github.com/systemjs/systemjs/wiki/Creating-a-Plugin
• loader.pluginLoader support for plugin loading in builds
• AMD production build adjusted to be a general CSP production build supporting System.register