Phase 3: Generation

With the transformation plan in hand, the agent generates the Mendix application using MDL scripts. Skills guide the agent toward correct, idiomatic MDL.

Key Skills

Skill	Purpose
`generate-domain-model`	Entity, association, and enumeration syntax with naming conventions
`write-microflows`	Microflow syntax, 60+ activity types, common patterns
`create-page`	Page and widget syntax for 50+ widget types
`overview-pages`	CRUD page patterns (list + detail)
`master-detail-pages`	Master-detail page layouts
`manage-security`	Module roles, user roles, GRANT/REVOKE, demo users
`manage-navigation`	Navigation profiles, menu items, home pages
`organize-project`	Folder structure, MOVE command, project conventions

Generation Workflow

# 1. Create a new Mendix project in Studio Pro (or use an existing one)
# 2. Execute MDL scripts in dependency order
mxcli exec domain-model.mdl -p app.mpr
mxcli exec microflows.mdl -p app.mpr
mxcli exec pages.mdl -p app.mpr
mxcli exec security.mdl -p app.mpr

# Or work interactively in the REPL
mxcli -p app.mpr

Example: Domain Model

-- Enumerations first (referenced by entities)
CREATE ENUMERATION Sales.OrderStatus (
  Draft 'Draft',
  Pending 'Pending',
  Confirmed 'Confirmed',
  Shipped 'Shipped',
  Delivered 'Delivered',
  Cancelled 'Cancelled'
);

-- Entities
/** Customer master data */
@Position(100, 100)
CREATE PERSISTENT ENTITY CRM.Customer (
  Name: String(200) NOT NULL ERROR 'Customer name is required',
  Email: String(200) UNIQUE ERROR 'Email already exists',
  Phone: String(50),
  IsActive: Boolean DEFAULT TRUE
)
INDEX (Name)
INDEX (Email);
/

/** Sales order */
@Position(300, 100)
CREATE PERSISTENT ENTITY Sales.Order (
  OrderNumber: String(50) NOT NULL UNIQUE,
  OrderDate: DateTime NOT NULL,
  TotalAmount: Decimal DEFAULT 0,
  Status: Enumeration(Sales.OrderStatus) DEFAULT 'Draft'
)
INDEX (OrderNumber)
INDEX (OrderDate DESC);
/

-- Associations
CREATE ASSOCIATION Sales.Order_Customer
  FROM CRM.Customer TO Sales.Order
  TYPE Reference OWNER Default;
/

Example: Microflow

CREATE MICROFLOW Sales.ACT_Order_CalculateTotal
BEGIN
  DECLARE $Order Sales.Order;
  RETRIEVE $Lines FROM Sales.OrderLine
    WHERE [Sales.OrderLine_Order = $Order];
  DECLARE $Total Decimal = 0;
  LOOP $Line IN $Lines
  BEGIN
    SET $Total = $Total + $Line/Price * $Line/Quantity;
  END;
  CHANGE $Order (TotalAmount = $Total);
  COMMIT $Order;
END;
/

Example: Page

CREATE PAGE CRM.Customer_Overview (
  Title: 'Customers',
  Layout: Atlas_Core.Atlas_Default
) {
  DATAGRID2 ON CRM.Customer (
    COLUMN Name { Caption: 'Name' }
    COLUMN Email { Caption: 'Email' }
    COLUMN Phone { Caption: 'Phone' }
    COLUMN IsActive { Caption: 'Active' }
    SEARCH ON Name, Email
    BUTTON 'New' CALL CRM.Customer_NewEdit
    BUTTON 'Edit' CALL CRM.Customer_NewEdit
    BUTTON 'Delete' CALL CONFIRM DELETE
  )
};
/

Validation Between Steps

Validate after each script to catch errors early:

# Syntax check (fast, no project needed)
mxcli check domain-model.mdl

# Reference validation (checks entity/microflow names exist)
mxcli check pages.mdl -p app.mpr --references

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