A customisable style package, jesse.sty, for clean documents from everyday writing to mathematical notes, books and large projects. The demo is a 47-page set of International Mathematical Olympiad solution notes, with a title page and a 2026 edition mark, to show headings, theorem-like environments and long-form maths. Load the package and write your own text on top. Replace the placeholder text with your own and compile the main file to see the result.
Shared under the MIT License. All credit to funkCCP; the licence comes with the project's files.