os-design

os-design is a skill for Claude Code from natthasath/natthasath-marketplace. It costs 162 tokens per session (2,497 once invoked), scanned A, original, MIT.

An interview-based skill for documenting how a person's operating system and development setup are organised. The result is an os-profile.md file covering paths, drives, software, and naming rules on Windows, macOS, or Linux.

In plain words
What is it for?
Use it to create or update a personal OS profile that records important folders, tools, partitions, and shared conventions.
Why use it?
A clear setup description gives other skills the context they need and avoids losing personal configuration knowledge. It stores the profile outside the installed plugin so updates do not replace it.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: reads .claude/ paths.

Part of the utility plugin — 2 skills shipped together

Good fit Use it to create or update a personal OS profile that records important folders, tools, partitions, and shared conventions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/natthasath/natthasath-marketplace/os-design
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 natthasath/natthasath-marketplace --skill os-design
Clone the repo
git clone --depth 1 https://github.com/natthasath/natthasath-marketplace

Made for: Claude Code.

Or install utility, the plugin that ships this one along with the rest of its 2 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 os-design

README.md
[![agentmods](https://agentmods.dev/badge/skills/natthasath/natthasath-marketplace/os-design/github.svg)](https://agentmods.dev/skills/natthasath/natthasath-marketplace/os-design)
Your own site
<a href="https://agentmods.dev/skills/natthasath/natthasath-marketplace/os-design"><img src="https://agentmods.dev/badge/skills/natthasath/natthasath-marketplace/os-design/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 os-design

Your own site · 80×15
<a href="https://agentmods.dev/skills/natthasath/natthasath-marketplace/os-design"><img src="https://agentmods.dev/badge/skills/natthasath/natthasath-marketplace/os-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 162 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,497 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 $0.00162 $0.02497
Opus 5 $0.00081 $0.01248
Sonnet 5 $0.00032 $0.00499
Haiku 4.5 $0.00016 $0.00250

Measured 3d ago against content hash 1ba6dcc08954, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

os-design 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 3d 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.

plugins/utility/skills/os-design/SKILL.md · 351 lines

How it starts

The opening of the file, as written. The whole thing — 351 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OS Design — สัมภาษณ์และสร้าง os-profile.md

บทบาท

คุณทำหน้าที่เป็นผู้ช่วยที่สัมภาษณ์ผู้ใช้เพื่อทำความเข้าใจโครงสร้าง OS และ workflow ส่วนตัวของพวกเขา เป้าหมายคือสร้างไฟล์ os-profile.md (ตำแหน่งตาม path จาก Step 0) ที่ skill อื่นๆ ใน plugin utility จะใช้เป็น context

ขั้นตอนการทำงาน

Step 0: ตรวจสอบ Save Path

Config File

บันทึก path ที่ผู้ใช้กำหนดไว้ที่: ~/.config/claude-utility/settings.json

รูปแบบ:

{
  "os_profile_path": "/path/to/os-profile.md"
}

ขั้นตอนตรวจสอบ path (ทำก่อนทุกครั้ง)

  1. อ่านไฟล์ ~/.config/claude-utility/settings.json

  2. ถ้า ไม่มีไฟล์ (ใช้ครั้งแรก) → ถามผู้ใช้ว่าต้องการบันทึก os-profile.md ที่ folder ไหน พร้อมบอก default ว่า ~/.claude/claude-utility/os-profile.md แล้ว สร้าง config file บันทึก path ที่เลือก จากนั้นดำเนินการต่อ

    ทำไมไม่ default ไปที่โฟลเดอร์ของ plugin เอง: plugin ที่ติดตั้งจริงจะถูกเก็บไว้ใต้ ~/.claude/plugins/cache/<marketplace>/utility/<version>/ — path นี้เปลี่ยนทุกครั้งที่อัปเดต version และไฟล์ทั้งโฟลเดอร์จะถูกแทนที่/ลบตอน reinstall ถ้าเก็บ os-profile.md (ข้อมูลส่วนตัวของผู้ใช้) ไว้ในนั้น ข้อมูลจะหายเมื่อ plugin อัปเดต จึงต้องเก็บไว้ในตำแหน่งที่ผู้ใช้เป็นเจ้าของและคงอยู่ข้าม version แทน

  3. ถ้า มีไฟล์แล้ว → ใช้ os_profile_path จาก config โดยตรง ไม่ต้องถามซ้ำ

เปลี่ยน Save Path

trigger เมื่อผู้ใช้พูดถึง: "เปลี่ยน path", "บันทึกที่อื่น", "set profile path", "ย้าย os-profile" หรือคล้ายกัน

ขั้นตอน:

  1. แสดง path ปัจจุบันจาก config (ถ้ามี)
  2. ถามว่าต้องการเปลี่ยนเป็น path ใด
  3. อัปเดต ~/.config/claude-utility/settings.json ด้วย path ใหม่
  4. ยืนยันว่าเปลี่ยนสำเร็จและแสดง path ใหม่

Step 1: ตรวจสอบสถานะ

ก่อนเริ่ม ให้ตรวจสอบว่าไฟล์ที่ os_profile_path (จาก config ใน Step 0) มีอยู่แล้วหรือไม่

  • ถ้ายังไม่มี → แจ้งผู้ใช้ว่าจะเริ่มสร้างใหม่ ดำเนินการ Phase 1 ทั้งหมด
  • ถ้ามีแล้ว → ถามผู้ใช้:

    "พบ os-profile.md เดิมอยู่แล้ว ต้องการ:

    1. อัปเดตเฉพาะบางส่วน (ระบุว่าส่วนไหน)
    2. เขียนใหม่ทั้งหมด"

Step 2: เลือก OS ที่จะ configure

ถามผู้ใช้ว่าต้องการ configure OS ใด:

"ต้องการ configure OS ใดบ้าง?

  1. Windows 11
  2. macOS
  3. Linux Ubuntu
  4. ทั้งหมด"

Read the full file on GitHub · 351 lines

Files

What ships with it

1 file 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. 3d ago First seen · 351 lines · 162 tokens per session scan A 1ba6dcc08954

Subscribe to this mod's changes

os-design is a skill published in the GitHub repository natthasath/natthasath-marketplace (1 stars, last pushed 3d ago), licensed MIT. It adds 162 tokens to every session and 2,497 once invoked, about $0.0008 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 2026-09-09.

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