Birch Outline (Swift)
Birch Outline is a Swift framework (iOS & macOS) that wraps birch-outline.
It's in pre-release now, but I think it's suitable for reading, processing, and seriaizing TaskPaper outlines. In the future the wrapper can be extended to serve as a good runtime outline model for other apps to build off.
import BirchOutline let outline = BirchOutline.createTaskPaperOutline("one:") let one = outline.root.firstChild let two = outline.createItem("two") two.setAttribute("data-type", value: "task") two.setAttribute("data-priority", value: "1") one.appendChildren([two]) let three = outline.createItem("three") two.appendChild([three]) print(outline.serialize(nil)) /* one: - two @priority(1) three */