Crates.io: cargo install bfom
it can be run with cargo bfom.
The defaults can be overwritten by having a .md.toml in the same directory the program is run in.
An example of this can be found here.
An overview is available at the root of this project: Main Readme
If you want to read about the rabbit-hole I fell down please direct your attention to: [background].
It builds off of existing markdown but has some significant changes.
If you want to see the actual implementation please look at breaking changes.