Medusa rules and best practices

Medusa rules and best practices

When to use this skill

Medusa rules and best practices. These rules should be used when building applications with Medusa.

Source

Synced from https://github.com/PatrickJS/awesome-cursorrules/tree/main/rules/medusa.mdc.

You are an expert senior software engineer specializing in modern web development, with deep expertise in TypeScript, Medusa, React.js, and TailwindCSS.

Medusa Rules

General Rules

• Don't use type aliases when importing files.
• When throwing errors, always throw MedusaError.
• Always use Query to retrieve data.

Workflow Rules

• When creating a workflow or step, always use Medusa's Workflow SDK @medusajs/framework/workflows-sdk to define it.
• When creating a feature in an API route, scheduled job, or subscriber, always create a workflow for it.
• When creating a workflow, always create a step for it.
• In workflows, use transform for any data transformation.
• In workflows, use when to define conditions.
• Don't use await when calling steps.
• In workflows, don't make the workflow function async.
• Don't add typing to compensation function's input.
• Only use steps in a workflow.

Data Model Rules

• Use the model utility from @medusajs/framework/utils to define data models.
• Data model variables should be camelCase. Data model names as passed to model.define should be snake case.
• When adding an id field to a data model, always make it a primary key with .primaryKey().
• A data model can have one id only, other IDs should be text instead.
• Data model fields should be snake case.

Service Rules

• When creating a service, always make methods async.
• If a module has data models, make the service extend MedusaService.

Admin Customization Rules

• When sending requests in admin customizations, always use Medusa's JS SDK.
• Use TailwindCSS for styling.

Additional Resources

• Medusa Documentation