ljg-rank SKILL.md skillA

ljg-rank from lijigang/ljg-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add lijigang/ljg-skills/ljg-rank@git:20261026.a6b1118

Pins git:20261026.a6b1118 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
lijigang/ljg-skills
Path
skills/ljg-rank/SKILL.md
Versions recorded
6
Latest version
git:20261026.a6b1118, committed Oct 26, 2026
First version recorded
May 3, 2026
Size
25,038 bytes
Repository stars
7,668
License
MIT

给一个领域,找出背后真正撑着它的几根独立的力。十几个现象砍到不可再少的生成器——砍完能把现象一个个生回来,才算数。Use when user says '降秩', '找秩', '秩是什么', '这个领域靠什么撑着', '背后是什么', or wants to decompose any domain to its irreducible generators.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# 降秩引擎

输入一个领域,输出它的秩。

## 秩是什么

秩不是"关键要素",不是"核心原则",不是"总结要点"。

秩是这么个东西:这个领域里真正独立的生成器,究竟有几根?拿这几根,能不能把全部现象一个个倒回来?能,才算找到。

但能倒回来只是底线。**Deutsch 在《无穷的开始》里立的尺**——好解释要过两关:

- **解释力**(reach)——不光能推出清单里的现象,还能推出清单外的,而且现实里真验得上。
- **难以变更**(hard to vary)——每根生成器、每个细节,都是被现象逼出来的。动一处,预测就崩。

坏解释能用十种说法糊过去——它根本不是在解释,是用模糊把面铺得很广。好解释只有这一种说法能把所有现象对上——动一根就塌。

找秩,找的就是这种"动一根就塌"的好解释。

## 怎么找:先抬头,再往下挖

挖之前,先抬头看一眼这个领域立在什么上面——**它的基本假设是哪几条?**

### 0. 先看基本假设(往上看,看到天花板)

一套理论,按亚里士多德的规矩,总要有几条不证自明的起点。基督教就立在三条上:

- 《圣经》是真的,一切思考从这里起。
- 上帝唯一,确实存在。
- 人是上帝造的,上帝爱人。

这三条不许问"为什么"——它们靠信,不靠证。动摇任何一条,整套教义就塌。

每个领域都有这种东西。物理学里是"自然律在时空中稳定"——你没法用实验去证,实验本身就预设了它。经济学里是"人会按自己的偏好排序选择"——这不是观察出来的结论,是入场的门票。哲学里是"语言能指称世界"——分析哲学整个家都建在这块地基上。

降秩之前,先把这几条挖出来,**明明白白写在纸上**。

操作问句两条,对着领域问:

- **这里什么是不许问的?**(一问就被当外行,或者被当冒犯)
- **什么是靠相信才成立的?**(没有它,后面所有论证都失去支点)

答出来的几条,就是这个领域的基本假设。

**假设和 rank,一句话分清**:

- **基本假设是天花板**——往上不可追,信而立。
- **root rank 是地板**——一层一层往下追,追到追不动,挖而见。

两个方向,一上一下。**地板没找到,鬼打墙;天花板没看清,容易把信仰当真理说出去**——后者更危险,因为听上去也像真理。

写进文章里的方式:开头一两句,把基本假设交代清楚。不展开论证,不解释"为什么是这几条"——它们的位置就是不证。然后才开始往下挖 rank。

### 1-7. 往下挖:穿透工序

判据是事后才能验的事,挖 rank 的力气全在过程里。判据再严,也只能挑出伪根——前提是工序走到了底。

七步,心里走完,不写进文章:

1. **铺现象**——领域里 10+ 个有代表性的现象,光铺,不解释。要的是给 rank 留一份可反生成的检验靶。
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add lijigang/ljg-skills/ljg-rank@sha256:1abb107af6377274

The line at the top of this page pins the label git:20261026.a6b1118, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_vsz3ojcgx7nkdkkz.svg)](https://markdownregistry.com/a/art_vsz3ojcgx7nkdkkz)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 6 versions of this file, between May 3, 2026 and Oct 26, 2026, about one every 35 days.

versioncommittedcommitsizeaudit
git:20261026.a6b1118 latest2026-10-26 a6b1118 25,038 BA view · diff
git:20260602.dd1d4b92026-06-02 dd1d4b9 25,039 BA view · diff
git:20260517.04c430e2026-05-17 04c430e 23,820 BA view · diff
git:20260514.f08797a2026-05-14 f08797a 22,673 BA view · diff
git:20260507.d1e9bdd2026-05-07 d1e9bdd 20,891 BA view · diff
git:20260503.6e10e532026-05-03 6e10e53 17,384 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (25038 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

lijigang/ljg-skills · 7,668 stars · license MIT · pushed 2026-11-02 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_vsz3ojcgx7nkdkkz
GET https://markdownregistry.com/api/v1/resolve?ref=lijigang/ljg-skills/ljg-rank
GET https://markdownregistry.com/api/v1/blob/1abb107af637727444cb32ac6eba3d0a1354edefbe06c6f3384d87cafaaafc09

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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