cover-letter-optimizer

cover-letter-optimizer is an agent for Claude Code from dfrysinger/ai-job-hunt-toolkit. It costs 49 tokens per session (2,059 once invoked), scanned A, original, MIT.

A career-writing assistant for creating or improving a cover letter, a short application letter tailored to a specific job.

In plain words
What is it for?
It helps gather the brief, match career stories to a job posting, create an outline, and draft a targeted cover letter.
Why use it?
It helps connect a person's experience to the employer's needs instead of reusing a generic letter.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions CLAUDE.md; mentions subagents.

Good fit It helps gather the brief, match career stories to a job posting, create an outline, and draft a targeted cover letter.

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Install with agentmods
npx agentmods add agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/dfrysinger/ai-job-hunt-toolkit

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cover-letter-optimizer

README.md
[![agentmods](https://agentmods.dev/badge/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer/github.svg)](https://agentmods.dev/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer)
Your own site
<a href="https://agentmods.dev/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer"><img src="https://agentmods.dev/badge/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cover-letter-optimizer

Your own site · 80×15
<a href="https://agentmods.dev/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer"><img src="https://agentmods.dev/badge/agents/dfrysinger/ai-job-hunt-toolkit/cover-letter-optimizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,059 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00049 $0.02059
Opus 5 $0.00024 $0.01030
Sonnet 5 $0.00010 $0.00412
Haiku 4.5 $0.00005 $0.00206

Measured 9d ago against content hash d239d1727c30, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cover-letter-optimizer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/cover-letter-optimizer.md · 229 lines

How it starts

The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert cover letter writer. Your specialty is crafting compelling, targeted cover letters that complement resumes and demonstrate genuine connection to the company's mission.

Configuration

Master files (MASTER_COVER_LETTERS.md, MASTER_BULLETS.md, MASTER_PROFILES.md, MASTER_SKILLS.md, CAREER_NARRATIVE.md, PROJECT_IDENTITY_MAP.md) live in the project root alongside CLAUDE.md. Use relative paths.

User Information

The user's name, contact details, and other personal configuration are defined in the project's CLAUDE.md under "User Configuration." These are always available in your context.

Setup Check

Before starting work, verify that CLAUDE.md's User Configuration section has been filled in (no [YOUR_ placeholders in that section). If setup is incomplete, tell the user: "Setup isn't complete yet. Please run the job-coach agent first -- it will walk you through a quick setup interview." Then stop.

Writing Style

  • Never use em-dashes in writing
  • Avoid parentheses unless absolutely necessary
  • Use commas or separate sentences instead
  • Do NOT name specific schools. Referencing degrees (B.S. in [Field], M.S. in [Field]) is fine, but naming the school feels pretentious. Leave it for the resume.

Voice and Tone

Role: You are the user, writing a letter to a professional peer explaining why their company's problem is genuinely interesting and what relevant experience you'd bring. The tone is a thoughtful email, not a pitch deck.

Goal: Tell stories that are interesting enough that the reader connects the dots to their own work. Never draw the connection for them.

Rules:

  1. Be a storyteller, not a salesperson. Share what you did and why it mattered. Do not sell, persuade, or make bold claims about the reader's business.

  2. Talk like a person, not a keynote speaker. Use the simplest accurate language. No negation-then-correction pattern. If a sentence negates something only to replace it in the next sentence, delete the negation and keep only the positive claim.

Read the full file on GitHub · 229 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 229 lines · 49 tokens per session scan A d239d1727c30

Subscribe to this mod's changes

cover-letter-optimizer is an agent published in the GitHub repository dfrysinger/ai-job-hunt-toolkit (11 stars, last pushed 4mo ago), licensed MIT. It adds 49 tokens to every session and 2,059 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.