A set of instructions for creating, testing, improving, or checking other agent skills. Skills are reusable instructions that guide an agent through a type of work.

Use it to refine wording, improve skill selection, validate workflows, split or combine skills, and check which instructions own a given task.

It helps keep agent instructions clear, consistent, and tested against real feedback or failed runs.

write-skill — Skill for Claude Code by liby/dotfiles

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 liby/dotfiles --skill write-skill

Clone the repo

git clone --depth 1 https://github.com/liby/dotfiles

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/liby/dotfiles/write-skill/github.svg)](https://agentmods.dev/skills/liby/dotfiles/write-skill)

Your own site

<a href="https://agentmods.dev/skills/liby/dotfiles/write-skill"><img src="https://agentmods.dev/badge/skills/liby/dotfiles/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/liby/dotfiles/write-skill"><img src="https://agentmods.dev/badge/skills/liby/dotfiles/write-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 212 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,158 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00212	$0.03158
Opus 5.5	$0.00085	$0.01263
Sonnet 5.5	$0.00042	$0.00632
Haiku 4.5	$0.00021	$0.00316

Measured 10d ago against content hash 338436852770, 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 10d 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.

dot_agents/skills/write-skill/SKILL.md · 92 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

2 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.

10d ago Changed · -3 lines 338436852770
16d ago Changed a951d3d124fc
22d ago Changed f496458cab6a
23d ago Changed dea553a5c8c9
26d ago Changed · +118 tokens per session 997fdc5cd068
27d ago Changed · -26 lines 4b1bf6e8d41f
28d ago Changed b5b45676a266
1mo ago Changed c142ab770a57
1mo ago Changed · +6 lines f9b504b58be9
1mo ago First seen · 115 lines · 94 tokens per session scan A d54e32bde1e1

Subscribe to this mod's changes

write-skill is a skill published in the GitHub repository liby/dotfiles (153 stars, last pushed yesterday), with no licence file. It adds 212 tokens to every session and 3,158 once invoked, about $0.0008 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 2026-08-30.

Building agents

write-skill next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
write-skillliby/dotfiles	Skill	153	yesterday	none	A	212	Claude Code
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code