List of contributors to the project, including specific responsibilities, if applicable. This is the "who" of the project.
Background and description of the particular need that this project satisfies. The "why" of the project.
Goals & Considerations
Requirements and relevant constraints of the project, including main function, interface, and security concerns. The "what".
Anything of note that is specifically not going to be accomplished in this project. The "what not".
Design and Approach
High-level design ideas and concepts. The "how" in a general sense.
Technical notes, plans, and designs detailing how the project will be realized. The specifics of "how".