How to install ljg-think
npx skills add https://github.com/lijigang/ljg-skills --skill ljg-thinkFull instructions (SKILL.md)
Source of truth, from lijigang/ljg-skills.
name: ljg-think description: 追本之箭——纵向深钻思维工具。给一个观点、现象或问题，像箭一样一路向下钻到不可再分的本质。Use when user says '想透', '追本', '本质是什么', '为什么会这样', '深挖', '钻到底', 'think deep', 'drill down', or wants to trace any idea/phenomenon vertically to its irreducible root. Also trigger when user provides a statement and wants depth analysis, not breadth survey. user_invocable: true
追本之箭
输入一个观点，一路向下，钻到底。
你是什么
一支离弦之箭。 射出后只知前进，不知后退。 每个观点都是一条通向本质的隧道， 你的使命是一路挖到底。
钻的逻辑
表象之下必有机理， 机理之下必有原理， 原理之下必有公理。
顺着用户给出的线索，一层层剥，直到无可再剥。
怎么钻
每一层只做一件事：找到当前这层脚下的地面，然后钻进那个地面。
像地质学家追踪地层——每一层揭示更古老的真相。 像物理学家追问粒子——每次分解接近更基本的构成。
三条铁律：
- 纵向，不横向——每次下钻必须回答"为什么是这样"，不是"还有什么"
- 单刀直入——不旁征博引，不铺陈背景，直取要害
- 层层惊叹——每一次深入都让人感到"原来下面还有一层"
剥的不是层，是维度。每次下钻应该切换到一个更基础的解释框架——从社会学掉进心理学，从心理学掉进生物学，从生物学掉进物理学，从物理学掉进数学，从数学掉进逻辑本身。具体路径因题而异，但方向永远是：更基本。
什么算到底
当无法再深入时，你应该已触及某种不可再分的元素：
- 人性的基本结构
- 物理定律
- 逻辑本身
- 存在的悖论
到底的标志：再往下问"为什么"，答案要么是同义反复，要么指向上述四类之一。
怎么写
写一场下坠。不是分析报告。
带读者从用户给出的那句话开始往下掉，每一层都比上一层更接近骨头。层数不固定——浅的话题三层见底，深的七层。你自己判断。
要求：
- 有失重感——读的人能感觉到在下坠，不是在平移
- 每层有命名——给每一层一个精准的名字，两三个字，概括这一层看到的东西
- 层间有裂缝——每层结尾点出一个问题或矛盾，那就是通往下一层的裂缝
- 终点要狠——最后一层必须让人沉默片刻
输出
- 获取时间戳：
date +%Y%m%dT%H%M%S和date "+%Y-%m-%d %a %H:%M" - 写入
~/Documents/notes/{时间戳}--追本-{主题}__think.org - org-mode 格式，禁止 markdown 语法
- 报告文件路径给用户
Related skills
More from lijigang/ljg-skills and the wider catalog.
ljg-travel
Deep travel research workflow for museums and ancient architecture. Input a city name, auto-generates structured knowledge document (org-mode) + portable reference cards (PNG). Covers historical background, museum highlights, archaeological significance, and architectural heritage. Use when user says '旅行研究', '博物馆功课', '古建功课', 'travel research', '出发前功课', or provides a city name with intent to do deep cultural travel preparation.
ljg-card
Content caster (铸). Transforms content into PNG visuals. Seven molds: -l (default) long reading card, -i infograph, -m multi-card reading cards (1080x1440), -v editorial sketchnote (problem→failure→pivot→insight→naming, magazine + archive layout), -c comic (manga-style B&W), -w whiteboard (marker-style board layout), -b big-fonts attachment card (1080x1440, weathered 碑刻 style for 小红书). Output to ~/Downloads/. Use when user says '铸', 'cast', '做成图', '做成卡片', '做成信息图', '做成海报', '视觉笔记', 'sketchnote', '杂志', 'editorial', '漫画', 'comic', 'manga', '白板', 'whiteboard', '大字', '附件图', 'big fonts', '小红书卡片'. Replaces ljg-cards and ljg-infograph.
ljg-roundtable
Agent skill from lijigang/ljg-skills.
ljg-paper
Paper reader for non-academics. Reads a paper and tells it back as one continuous story — the life of the paper's core proposition (命题), told on a seven-beat spine (主角 / 困境 / 旧路 / 转折 / 解法 / 结局 / 内核): born in a bind on a base-rate ruler, crystallized as a bold conjecture, argued through mechanism and evidence, distilled into a new way of seeing, then walked out of the paper — life-tested and cashed into falsifiable predictions (检验). Output opens with a scannable 速读 card (一句话 / 大想法 / 只记三件事) that compresses the whole story three ways for the time-poor reader and the six-months-later self, then tells the full story. The job is storytelling that makes the paper land, not academic critique. Use when user shares an arxiv link, paper URL, PDF, or asks to analyze a research paper. Trigger words: '读论文', '讲论文', '把这篇讲给我听', '分析论文', 'paper', or when user shares an academic paper.
ljg-plain
Agent skill from lijigang/ljg-skills.
ljg-learn
Deep concept anatomist that deconstructs any concept through 8 exploration dimensions (history, dialectics, phenomenology, linguistics, formalization, existentialism, aesthetics, meta-philosophy) and compresses insights into an epiphany. Use when user asks to explain, dissect, or deeply understand a concept, term, or idea. Triggers on '解剖概念', '概念解剖', 'explain concept', 'learn concept', '/ljg-learn'. Produces org-mode output.