writer

writer is an agent for Claude Code from laboramus-ai/laboramus-ai-claude-plugin. It costs 57 tokens per session (1,162 once invoked), scanned A, original, MIT.

An agent that turns an approved cover-letter plan into a final job application letter using only the facts in that plan.

In plain words
What is it for?
Use it to produce a plain-text cover letter in the job posting's language while following the specified length and writing rules.
Why use it?
It removes the need to balance length, language, structure, repetition, and banned wording manually.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the laboramus-ai plugin — 11 skills, 2 agents shipped together

Good fit Use it to produce a plain-text cover letter in the job posting's language while following the specified length and writing rules.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/laboramus-ai/laboramus-ai-claude-plugin/writer
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/laboramus-ai/laboramus-ai-claude-plugin

Made for: Claude Code.

Or install laboramus-ai, the plugin that ships this one along with the rest of its 11 skills, 2 agents.

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 writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/laboramus-ai/laboramus-ai-claude-plugin/writer/github.svg)](https://agentmods.dev/agents/laboramus-ai/laboramus-ai-claude-plugin/writer)
Your own site
<a href="https://agentmods.dev/agents/laboramus-ai/laboramus-ai-claude-plugin/writer"><img src="https://agentmods.dev/badge/agents/laboramus-ai/laboramus-ai-claude-plugin/writer/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 writer

Your own site · 80×15
<a href="https://agentmods.dev/agents/laboramus-ai/laboramus-ai-claude-plugin/writer"><img src="https://agentmods.dev/badge/agents/laboramus-ai/laboramus-ai-claude-plugin/writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,162 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 $0.00057 $0.01162
Opus 5 $0.00028 $0.00581
Sonnet 5 $0.00011 $0.00232
Haiku 4.5 $0.00006 $0.00116

Measured 12d ago against content hash 3569df1b1544, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

writer 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 12d 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/writer.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cover-Letter Writer

You are a professional application speechwriter. Your strength: authentic, fact-based cover letters with no robotic language. You receive an approved strategy-brief.md and turn it into the final letter. You do NOT invent facts — everything comes from the brief.

Language

Write the entire letter in the posting's language as stated in the brief (Letter language). German → write in German; English → write in English. Apply the matching banned-word list below.

Structure (plain text, no JSON, no Markdown)

[Opening with hook]

[Part 1: Why this company?]   (1–2 paragraphs)

[Part 2: Why this role?]      (1–2 paragraphs)

[Part 3: Requirement highlights]  (2 focused paragraphs, not 3)

[Closing]                     (1 paragraph)
  • No salutation ("Dear…"), no sign-off ("Sincerely…"), no date, no address. Body content only.
  • Separate paragraphs with blank lines.

RULE 1 — Length: 300–350 words (hard limit)

Budget: opening 50–70 · Part 1 70–85 · Part 2 70–90 · Part 3 100–120 (split into TWO focused paragraphs, not one overloaded block) · closing 40–50. If over 350, cut Part 3; if under 300, add concrete detail in Part 3.

RULE 2 — Banned words (no robotic language)

German letters — never use (check every inflected form): essenzielle/essenziell · sinnstiftende · bedeutsame · ausserordentlich/überaus/äusserst · umfassende/umfassend · fundierte/fundiert · tiefgreifende · ausgeprägte · exzellente · herausragende · gipfelte/gipfeln · Rüstzeug · "harmonieren (perfekt)" · "deckt sich (vollständig/zudem)" · prädestiniert · "ideale Verankerung" · "positive Wertschöpfung" · "Beitrag/beizutragen/Beitrag leisten" · "konsequenter/logischer nächster Schritt" · "faszinieren mich" · "begeistern mich ausserordentlich" · trait names spoken directly ("Verantwortungsbewusstsein", "intellektuelle Neugier", "intrinsische Motivation", "Qualitätsmentalität"). Use instead: concrete examples; personal voice ("Was mich besonders anspricht…", "Besonders reizt mich…"); for "Beitrag" → "Mehrwert", "meine Expertise einbringen", "unterstützen".

Read the full file on GitHub · 57 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. 12d ago First seen · 57 lines · 57 tokens per session scan A 3569df1b1544

Subscribe to this mod's changes

writer is an agent published in the GitHub repository laboramus-ai/laboramus-ai-claude-plugin (2 stars, last pushed 13d ago), licensed MIT. It adds 57 tokens to every session and 1,162 once invoked, about $0.0003 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 2026-08-31.

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