libellus is a command-line tool that takes feast information in YAML format and produces beautifully formatted liturgical booklets as PDF output. It supports Gregorian chant, Gregorio, and traditional Latin liturgy workflows using LaTeX under the hood.
In the CLI tools & terminal space, libellus takes a focused approach. Automatically generating formatted liturgical booklets and PDFs from structured YAML data for religious services. libellus is an open-source project aimed at liturgists. The project is open source (0BSD). It ships for the command line.
libellus first shipped in 2026. The project is developed in the open on GitHub with 4 commits in the last 90 days. Key capabilities include PDF Generation, YAML Processing, and LaTeX Integration.
Summary written by a language model from the project’s public pages.
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