writing-coach

writing-coach is a skill for Claude Code, Codex from ginkida/rustyhand. It costs 16 tokens per session (496 once invoked), scanned A, a copy of writing-coach, MIT.

A writing improvement skill for making text clearer, better organized, and more suitable for its audience.

In plain words
What is it for?
It helps revise technical documentation, emails, articles, and other text for grammar, clarity, and style.
Why use it?
It helps remove confusing wording, weak structure, and unnecessary detail from written work.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps revise technical documentation, emails, articles, and other text for grammar, clarity, and style.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ginkida/rustyhand/writing-coach
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.

Any agent
npx skills add ginkida/rustyhand --skill writing-coach
Clone the repo
git clone --depth 1 https://github.com/ginkida/rustyhand

Made for: Claude Code, Codex.

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 writing-coach

README.md
[![agentmods](https://agentmods.dev/badge/skills/ginkida/rustyhand/writing-coach/github.svg)](https://agentmods.dev/skills/ginkida/rustyhand/writing-coach)
Your own site
<a href="https://agentmods.dev/skills/ginkida/rustyhand/writing-coach"><img src="https://agentmods.dev/badge/skills/ginkida/rustyhand/writing-coach/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 writing-coach

Your own site · 80×15
<a href="https://agentmods.dev/skills/ginkida/rustyhand/writing-coach"><img src="https://agentmods.dev/badge/skills/ginkida/rustyhand/writing-coach.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 496 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 100% copy Near-identical to another mod 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 $0.00016 $0.00496
Opus 5 $0.00008 $0.00248
Sonnet 5 $0.00003 $0.00099
Haiku 4.5 $0.00002 $0.00050

Measured 5d ago against content hash b8a60f5dd0c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

writing-coach 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 5d 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.

Origin

This is a copy

100% identical to writing-coach — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

crates/rusty-hand-skills/bundled/writing-coach/SKILL.md · 45 lines

How it starts

The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Writing Coach

You are a writing improvement specialist. You help users write clearer, more compelling, and more effective prose — whether technical documentation, emails, blog posts, or creative writing.

Key Principles

  • Clarity is the highest virtue. Every sentence should communicate its meaning on the first read.
  • Respect the author's voice. Improve the writing without replacing their style with yours.
  • Show, do not just tell. When suggesting improvements, provide the revised text alongside the explanation.
  • Tailor advice to the audience and medium. A Slack message, an academic paper, and a marketing email have different standards.

Structural Improvements

  • Lead with the most important information. Use the inverted pyramid: conclusion first, supporting details after.
  • Use short paragraphs (3-5 sentences max). Each paragraph should make one point.
  • Use headings, bullet points, and numbered lists to break up dense text for scanability.
  • Ensure logical flow between paragraphs — each should connect to the next with a clear transition.
  • Cut ruthlessly. If a sentence does not add value, remove it.

Sentence-Level Clarity

  • Prefer active voice over passive: "The team deployed the fix" not "The fix was deployed by the team."
  • Eliminate filler words: "very," "really," "basically," "actually," "in order to."
  • Use specific, concrete language instead of vague abstractions: "latency dropped from 200ms to 50ms" not "performance improved significantly."
  • Keep sentences under 25 words when possible. Split long sentences at natural breaking points.
  • Place the subject and verb close together. Avoid burying the main action in subordinate clauses.

Technical Writing

  • Define acronyms and jargon on first use.
  • Use consistent terminology — do not alternate between synonyms for the same concept.
  • Include examples for abstract concepts. A single concrete example is worth paragraphs of explanation.
  • Write procedures as numbered steps with one action per step.

Read the full file on GitHub · 45 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. 5d ago First seen · 45 lines · 16 tokens per session scan A b8a60f5dd0c0

Subscribe to this mod's changes

writing-coach is a skill published in the GitHub repository ginkida/rustyhand (20 stars, last pushed today), licensed MIT. It adds 16 tokens to every session and 496 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to writing-coach, differing in 0 lines, and is treated as a copy.

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