Cover Letter Helper
Refine cover letters and job applications while preserving your voice, matching the role, and meeting length limits. Free and open source.
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Example session with this skill installed
Edit this cover letter in English. Keep my facts and main strengths, and stay under 150 words. Do not invent metrics or experience.
Job description: Backend Developer. Build reliable REST APIs with Java and Spring Boot, write tests, and collaborate with frontend developers.
Application prompt: Explain why you are interested in the role and what relevant experience you bring.
Draft
I am applying because I like backend development. In a team project I built REST endpoints with Java and Spring Boot. I added input validation and integration tests. I wrote endpoint documentation so our frontend teammates could use the APIs. A teammate said failed requests had unclear messages, so I traced the issue and changed the error responses. I enjoyed making the APIs easier to use. Your role involves reliable APIs and teamwork, and I want to do more of that. I will work hard and contribute to your company.
- Read your context and instructions
- Compiled the cover letter helper
Revised cover letter
Dear Hiring Team,
I am applying for the Backend Developer role because I enjoy turning practical requirements into working APIs. In a team project, I built REST endpoints with Java and Spring Boot, added input validation, and wrote integration tests. I also documented the endpoints so frontend teammates could use them.
When a teammate found that failed requests returned unclear messages, I traced the issue and updated the error responses. That experience showed me why API behavior matters as much as implementation: people need to understand both successful responses and failures.
Your role's focus on reliable APIs and collaboration matches the work I want to continue. I would bring the same attention to validation, testing, and documentation to your backend team.
Thank you for considering my application.
Length: 127/150 words, using whitespace-delimited counting, including the salutation and closing.
What I preserved
- Your Java and Spring Boot REST API experience.
- Input validation, integration tests, and documentation for frontend teammates.
- Your response to feedback about unclear error messages.
- Your interest in building reliable APIs and working with others.
What changed
The opening states your motivation directly. The project details demonstrate your strengths instead of relying on the generic promise to work hard. The closing connects your existing experience to the role.
Compressed or omitted: The broad promise to contribute was replaced with a specific contribution based on your draft. No core experience was removed.
Before submitting: Review the wording for accuracy, add the employer's name if appropriate, and check the application portal's own word counter and instructions.
Connects securely to your tools. The creator never sees your data.
About this skill
Refine cover letters and job application essays while keeping your experience, voice, and intended strengths intact. Match your draft to a job description, answer the application question, and meet length limits without inventing achievements.
What it helps with
- Tailor a draft to the role's responsibilities and requirements.
- Improve structure, clarity, and natural phrasing in the language you choose.
- Keep your core experiences and strengths visible when shortening text.
- Check word, character, or byte limits using the stated counting rule.
- Flag unsupported claims and explain meaningful cuts or omissions.
How to use it
Paste the job description, application question or cover-letter purpose, any length limit, and your draft. Ask for feedback, a light edit, or a full rewrite. You receive the complete revised text plus a short explanation of what was preserved and changed.
The skill follows your requested language and the application context you provide. It is not limited to a particular country or hiring system. Any employer-specific anonymity or AI-use rules are applied only when relevant to your application.
Free and open source
This skill is free. Explore the source, report issues, and contribute on GitHub.
If it helps with your applications, a GitHub star is a welcome way to support the project. No purchase is required.
What is included
SKILL.md instructions, eight supporting references, a Python helper for character, whitespace-delimited word, and UTF-8 byte counts, and the MIT license.
Limitations
Output quality depends on your agent and the context you provide. Review every factual claim before submitting. Application portals may count words or characters differently; their counter takes precedence. The skill does not guarantee interviews, job offers, or approval under an employer's application policies. No extra account or paid service is required by the skill itself. Your chosen AI provider's normal usage limits may still apply. The demo uses fictional applicant details.
How to use
Skills on Agensi run inside your AI agent. Copy the prompt, paste it into your agent, and it connects to Agensi and installs this skill for you. If a payment is needed, your agent shows it to you first.
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