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How to Create a Reusable AI Agent in Cursor for Consistent Document Generation

Define a set of instructions in a markdown file to create a custom AI agent within Cursor. Use this agent to consistently generate structured documents like Product Requirements Documents (PRDs) for your projects.

From How I AI

How I AI: A Beginner's Guide to Coding with AI—Build Your First Project Hub

with Claire Vo

How to Create a Reusable AI Agent in Cursor for Consistent Document Generation

Tools Used

Cursor

AI-first code editor

Step-by-Step Guide

1

Create an Agent Instruction File

In your project, create a dedicated folder (e.g., agents) and add a new markdown file inside it (e.g., prd.md). This file will hold the permanent instructions for your custom AI agent.

2

Generate the Agent's Instructions

Ask Cursor's AI to populate your new markdown file with instructions. Tell the AI what kind of document the agent should create (a PRD), where it should be saved (@docs folder), and any formatting requirements.

Prompt:
Can you fill out @prd.md. This is a blank file to be agent instructions to write a great PRD in the @docs folder. PRDs should be in markdown and the instructions should be less than 500 lines long for our AI agent to follow.
3

Use Your Custom Agent to Write a Document

Now, write a new prompt to create a specific document. The key is to reference your instruction file using the '@' symbol. The AI will read the rules from your prd.md file and apply them to generate the new content.

Prompt:
Great. Now write me a PRD for a little scheduling app where my kid can have our neighbors schedule help with weeding, taking out trash cans and sweeping their driveways.
4

Verify the Output

Check that the new document has been created in the correct folder (docs) and follows the structure you defined in your agent's instructions. You can now reuse this agent anytime you need to write a new PRD with a consistent format.

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