Rails internals: application bootup, plugins, generators, and rake tasks.

RDoc produces HTML and command-line documentation for Ruby projects. RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentation from the command-line.

Taski is a Ruby-based task runner currently under development. It allows you to define small, composable tasks along with the outputs they depend on. Taski statically resolves dependencies and executes tasks in the correct topological order, from the most dependent tasks first. It also supports reverse execution, useful for cleaning up temporary files after a build. **Note:** Taski does not yet support circular dependencies and may change as development progresses.

A pluggable system for loading external variables from one or more providers (e.g. ENV).