This adjusts how triggers are implemented during a normal run. Any defined triggers which are applicable are located and injected into the run stack as the stack is built, including hook type triggers. Support is included for dynamic hook lookup. The data type used when defining triggers has also been relaxed to support symbols, strings, or constants.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.