Debug DotLiquid Templates Locally with the VS Code DotLiquid Debugger

The Problem We Are Solving Shopify’s Liquid preview is useful, but Logic Apps Standard runs DotLiquid, not Shopify Liquid. That means behavior can differ, so a template that looks correct in Shopify preview can still fail in Logic Apps. The default Logic App testing loop is slow: update template, execute, wait, inspect run history, repeat. For real B2B transforms, that guesswork is costly. This post shows how to debug DotLiquid locally in VS Code with fast feedback and runtime-accurate results. The Core Idea: Local Preview with the Exact Same Engine The DotLiquid Debugger VS Code extension runs your templates locally, using the exact same DotLiquid 2.0.361 engine that Azure Logic Apps Standard uses in production. This is the critical part: it uses the exact same engine — not a simulation. Not a compatible implementation. The same NuGet package, the same version, the same sentence-cased filters, the same content wrapping behaviour, the same integer division quirks. If it works here, you