diff --git a/.imag-documentation/src/lib.rs b/.imag-documentation/src/lib.rs
index cdfbe1aa..2f50c33f 100644
--- a/.imag-documentation/src/lib.rs
+++ b/.imag-documentation/src/lib.rs
@@ -1,6 +1,40 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-    }
-}
+//! # imag
+//!
+//! This is the _developer_ documentation for the imag personal information management suite for the
+//! commandline.
+//!
+//! For the user documentation, have a look
+//! [at the 'doc' subtree in the repository](http://git.imag-pim.org/imag/tree/doc)
+//! which can be compiled to HTML or PDF using [pandoc](pandoc.org) (and might be a bit outdated as
+//! imag is not yet released for use).
+//!
+//! ## General
+//!
+//! _Some_ things from the user documentation might be helpful for developers as well, so make sure
+//! to at least skim over it if you want to contribute to the imag source.
+//!
+//! Also make sure you had a look at
+//! [the CONTRIBUTING](http://git.imag-pim.org/imag/tree/CONTRIBUTING.md)
+//! file and [the developers certificate of origin](http://developercertificate.org/), which we also
+//! have in the `CONTRIBUTING` file, by the way.
+//!
+//! ## Contributing
+//!
+//! All things relevant for contributing are descripbed in
+//! [the CONTRIBUTING file](http://git.imag-pim.org/imag/tree/CONTRIBUTING.md),
+//! but here are some additional notes:
+//!
+//! * We have a `editorconfig` file in the repository. Would be nice if you'd
+//!   [use it](http://editorconfig.org/)
+//! * We have [default.nix](http://git.imag-pim.org/imag/tree/default.nix) file, which can be used
+//!   to install dependencies in `nix-shell` environments. If you have a installation of the nix
+//!   package manager, feel free to use this opportunity to be _pure_.
+//! * If you want to play around with imag, use the
+//!   [imagrc.toml](http://git.imag-pim.org/imag/tree/imagrc.toml)
+//!   file from the repository, we try to keep it up to date.
+//! * You can use [the Makefile](http://git.imag-pim.org/imag/tree/Makefile) to build things (if you
+//!   have all dependencies and cargo/rustc installed, of course).
+//! * It is a real advantage to use `cargo-check` when developing things - it speeds you up, beleive
+//!   me!
+//!
+