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Create your first flow

Now that pgflow is installed, let’s create a simple hello world flow that demonstrates the core concepts.

Our flow will:

Take a person’s first name and last name as input
Format a full name
Create a personalized greeting

Creating a Simple Greeting Flow

Set up your project structure
Section titled “Set up your project structure”

First, create a directory for your flow:
```
mkdir -p supabase/functions/_flows
```
- Directorysupabase
  - Directoryfunctions
    Directory_flows
    greet_user.ts

Create the flow definition

Create a file called supabase/functions/_flows/greet_user.ts with this content:

import { Flow } from 'npm:@pgflow/dsl';

type Input = {
  first_name: string;
  last_name: string;
};

export default new Flow<Input>({
  slug: 'greet_user',
})
  .step(
    { slug: 'full_name' },
    (input) => `${input.run.first_name} ${input.run.last_name}`
  )
  .step(
    { slug: 'greeting', dependsOn: ['full_name'] },
    (input) => `Hello, ${input.full_name}!`
  );