What problem does it solve? Writing Obsidian .base files by hand requires memorizing YAML schema, filter syntax, formula functions, and view configuration, and small quoting or reference mistakes silently break the view. This Skill provides the complete schema, syntax rules, and troubleshooting guidance needed to produce valid Bases on the first attempt. ## Core Features & Use Cases - Base File Authoring: Generate valid .base YAML with global and per-view filters, formula definitions, property display names, and summaries. - View Configuration: Configure table, cards, list, and map views with ordering, grouping, limits, and summary formulas like Average, Sum, and Median. - Formula & Filter Guidance: Apply correct filter operators, date arithmetic with Duration fields, null-safe formulas, and YAML quoting rules to avoid common errors. - Use Case: Build a task tracker base that filters notes tagged "task", computes days until due and overdue status with formulas, groups a table view by status, and shows a separate completed-tasks view. ## Quick Start Create an Obsidian base file that shows all notes tagged "book" in a cards view with the author and a formula showing estimated reading time.