Use Replit Agent to build a cover-letter app
Moe Lueker built two versions of a cover-letter application to compare an interview-style prompt with a detailed written specification.
moelueker.com
Suggested prompt
Suggested prompt written by Agents In Use, not the source author. Replace bracketed inputs and review tool permissions first.
Build a cover-letter app using [resume] and [job description], with target length, saved history and PDF export. Ask me about scope first. Demonstrate length handling and export formatting with representative inputs.
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See placements →What happened
Lueker reports two working cover-letter apps after repairing a 25-word cutoff on a 325-word request and correcting compressed PDF formatting.
Reported by Moe LuekerHow the agent did it
- Define resume and job-description inputs.
- Build accounts, generation and saved data.
- Repair length and PDF-export failures.
Where a person stepped in
Lueker approved plans and tested real inputs.
Moe Lueker built two versions of a cover-letter application to compare an interview-style prompt with a detailed written specification. Both accepted a resume, job description and desired length and included accounts and saved data. He ran the builds side by side and published a version readers could try.
The interview approach asked questions before planning the screens and data. Lueker changed the suggested login provider to Replit's own authentication. The specification approach defined the flow, generation rules, account limits and design in advance. He reports that both builds were close after repairs.
Those repairs are the most useful part of the account. A test requesting a 325-word letter returned only 25 words. Lueker described that exact failure, and the agent corrected the generation. The other version needed PDF formatting repaired after an export appeared compressed into one font size. He disclosed that Replit sponsored the walkthrough. The resulting apps were working artifacts, with observed defects and subsequent fixes kept in the record.
Prompt
Suggested prompt (written by Agents In Use, not the author's)
Source: moelueker.com · Moe Lueker
Frequently asked questions
What inputs did the apps use?
A resume, job description and target length.
What generation error appeared?
A 325-word request returned 25 words.
Was the walkthrough sponsored?
Lueker disclosed Replit sponsorship.
More details
About this account
Replit planned, built and revised the apps.
Firsthand account opened and read. Results are attributed to the author. Prompt is our suggested adaptation, not an original quotation.
Credit: Moe Lueker
Source published 8 Aug 2026
Source checked 14 Oct 2026
Tools and topics
Replit Agent · Replit Auth · Database · PDF export
Cover letters · PDF exports · App building
Editorial completeness: 100/100. Measures documented fields, not agent performance or verified outcomes.