Seven columns, Monday to Sunday. One line per task — it becomes a checkbox on export.
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Preview
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One line, one task. In Sections every non-empty line becomes - [ ] task under a heading for its day. Lines already starting with a Markdown marker — a dash, a #, a quote — are left exactly as written, so headings and notes survive intact.
Table keeps the week's shape. The other format is a single seven-column table, days across the top and tasks filling downwards, so the export looks like the planner rather than a stack of lists. Markdown doesn't render checkboxes inside table cells, so those become ☐ and ☑ characters, and any | in your text is escaped so it can't break the row.
Each week is saved separately. Move back and forward with the arrows; whatever you typed in a week is still there when you return. Everything lives in this browser only.