How I Built an AI Agent That Writes Personalised Freelance Cover Letters with Runner H
Pravesh Sudha

Pravesh Sudha @pravesh_sudha_3c2b0c2b5e0

About: AWS Community Builder Bridging critical thinking and innovation, from philosophy to DevOps.

Location:
India
Joined:
Jul 19, 2024

How I Built an AI Agent That Writes Personalised Freelance Cover Letters with Runner H

Publish Date: Jun 12
7 3

This is a submission for the Runner H "AI Agent Prompting" Challenge

🚩 The Problem: Freelancers Waste Time Writing Cover Letters

If you're a freelancer like me, you know the drill:
You see a gig, get excited, then... spend 20–30 minutes crafting a unique cover letter.
Repeat that a few times a day, and it becomes a major productivity drain.

I wanted to automate this — but not with generic templates.
I wanted tailored, high-quality cover letters that actually speak to the job.


🧰 The Tools

This project uses:

  • Runner H (AI agent platform by Vercel)
  • Google Docs (to host my resume and job descriptions)
  • Gmail (optional – to email the letter to myself or clients)

🛠️ How the Agent Works

First, I connected Google Docs and Gmail to Runner H — this allowed the agent to read documents and (optionally) send emails on my behalf.

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Then, I created two Google Docs:

  • portfolio: contains my freelance resume / experience

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  • job: contains the client's job post or project details

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For Demonstration purpose, I put down my second email sudhapravesh2003@gmail.com

Once the connections were set up, I gave Runner H this simple prompt:

"I have Portfolio and job description of a freelance gig hosted on my Google Docs named portfolio (Doc-id) and job (Doc-id).

Based on that, create a cover letter for the freelance gig, save it in a new document named Cover-letter, and email it — if the client's email is mentioned in the job description, send it there. Otherwise, send the cover letter to my email address."

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That’s it — and within seconds, it generated a high-quality, job-specific cover letter and saved it in my Google Docs. No extra steps, no editing needed.

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Once the Runner was completed, a mail was sent from my mail programmerpravesh@gmail.com to sudhapravesh2003@gmail.com


📹 Demo

Here's a Youtube Video for the Demo:
Watch the video


⏱️ Result: 30 Minutes Saved. Every. Single. Time.

Before: Write, edit, proofread — 20–30 mins per application.
Now: 1 prompt. 10 seconds. Done.

Imagine applying to 5 gigs in 5 minutes.
That’s the power of AI agents when used right.


💬 Bonus Quote

“Runner H now writes my proposals while I sleep.”

Here's the Tweet/Post on my Handle:


🚀 Want to Try It?

If you're a freelancer, or just someone tired of writing repetitive emails, try Runner H + Google Docs. You can build this agent in under 10 minutes.

Comments 3 total

  • Thomas
    ThomasJun 12, 2025

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  • Kusal Darshana
    Kusal DarshanaJun 17, 2025

    Great work

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