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write-skill

write-skill is a skill for Claude Code from tobihagemann/turbo. It costs 44 tokens per session (2,146 once invoked), scanned A, original, MIT.

A guide for creating or updating a skill that extends what Claude can do. It covers the skill's instructions, structure, wording, workflows, tool use, testing, and evaluation.

In plain words
What is it for?
Use it when creating a new skill or revising an existing one, including skills that use tools or executable code.
Why use it?
A skill can be unclear, too rigid, or incomplete if it is written without a consistent structure. This guide helps turn a request into usable agent instructions.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_SKILL_DIR} variable. Also seen: mentions subagents; names the AskUserQuestion tool.

Part of the turbo plugin — 71 skills shipped together

not rated 420repo +1 changed 2d ago A scan 44 tokens original MIT

Good fit Use it when creating a new skill or revising an existing one, including skills that use tools or executable code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tobihagemann/turbo/write-skill
View source ↗ tobihagemann/turbo
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 tobihagemann/turbo --skill write-skill
Clone the repo
git clone --depth 1 https://github.com/tobihagemann/turbo

Made for: Claude Code.

Or install turbo, the plugin that ships this one along with the rest of its 71 skills.

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 write-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/tobihagemann/turbo/write-skill/github.svg)](https://agentmods.dev/skills/tobihagemann/turbo/write-skill)
Your own site
<a href="https://agentmods.dev/skills/tobihagemann/turbo/write-skill"><img src="https://agentmods.dev/badge/skills/tobihagemann/turbo/write-skill/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 write-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/tobihagemann/turbo/write-skill"><img src="https://agentmods.dev/badge/skills/tobihagemann/turbo/write-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,146 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 $0.00044 $0.02146
Opus 5.5 $0.00018 $0.00858
Sonnet 5.5 $0.00009 $0.00429
Haiku 4.5 $0.00004 $0.00215

Measured 2d ago against content hash faccf77b0633, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

write-skill 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 2d 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.

claude/skills/write-skill/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write Skill

This skill guides the creation of effective skills. Authoring guidance is split across the reference files below. Read the ones the current step needs rather than all of them.

Reference Covers
references/principles.md Conciseness, instructions-not-documentation, degrees of freedom
references/structure.md Frontmatter, naming, descriptions, progressive disclosure, file layout
references/writing.md Prose rules: terminology, phrasing, conditions, thresholds
references/workflows.md Step/phase structure, feedback loops, exit signals, output patterns
references/composition.md Depending on, invoking, and fanning out to other skills
references/tools.md Agent, Bash, AskUserQuestion, and MCP tool invocation
references/evaluation.md Evaluations and iterating on a skill from observed behavior
references/scripts.md Skills that bundle executable code
references/harness.md Harness tool names, permission modes, and discovery paths

For conceptual background on how Skills work, see the Skills overview on platform.claude.com.

Step 1: Understanding the Skill with Concrete Examples

Skip this step only when the skill's usage patterns are already clearly understood. It remains valuable even when working with an existing skill.

To create an effective skill, clearly understand concrete examples of how the skill will be used. This understanding can come from either direct user examples or generated examples that are validated with user feedback.

For example, when building an image-editor skill, relevant questions include:

  • "What functionality should the image-editor skill support? Editing, rotating, anything else?"
  • "Can you give some examples of how this skill would be used?"
  • "I can imagine users asking for things like 'Remove the red-eye from this image' or 'Rotate this image'. Are there other ways you imagine this skill being used?"
  • "What would a user say that should trigger this skill?"

Read the full file on GitHub · 127 lines

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago Changed faccf77b0633
  2. 3d ago First seen · 127 lines · 44 tokens per session scan A 43d2cefffddf

Subscribe to this mod's changes

write-skill is a skill published in the GitHub repository tobihagemann/turbo (420 stars, last pushed today), licensed MIT. It adds 44 tokens to every session and 2,146 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-11-09.

Building agentsClaude Codeagent-skillsclaude-skillscodexdeveloper-toolsskills
Related

write-skill compared with skills from other repositories

write-skill next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
write-skilltobihagemann/turboSkill420todayMITA44Claude Code
offensive-c2-frameworksSnailSploit/Claude-RedSkill11kyesterdayMITA250Claude Code, Codex
offensive-crypto-attacksSnailSploit/Claude-RedSkill11kyesterdayMITA261Claude Code, Codex
offensive-parameter-pollutionSnailSploit/Claude-RedSkill11kyesterdayMITA0Claude Code, Codex
offensive-z-waveSnailSploit/Claude-RedSkill11kyesterdayMITA113Claude Code, Codex
fiscalisteromainsimon/paperasseSkill2.6ktodayMITA306Claude Code
comptableromainsimon/paperasseSkill2.6ktodayMITA248Claude Code