Shopify Liquid Themes

This is a comprehensive reference for anyone building or maintaining Shopify themes. It covers the full Liquid syntax with all the gotchas that trip people up (no parentheses in conditions, 50-iteration loop limits, contains only works on strings). The schema documentation is especially useful, with a decision table for picking the right setting type and concrete examples of section versus block structure. It also includes quick lookups for filters, tags, and objects so you're not constantly switching to Shopify docs. If you're working on theme customization or app blocks, this gives you the patterns and constraints in one place instead of scattered across official documentation.