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.
npx skills add ditingdapeng/ThinkingLearning --skill first-principles-skillsgit clone --depth 1 https://github.com/ditingdapeng/ThinkingLearningWrote 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.
[](https://agentmods.dev/skills/ditingdapeng/thinkinglearning/first-principles-skills)<a href="https://agentmods.dev/skills/ditingdapeng/thinkinglearning/first-principles-skills"><img src="https://agentmods.dev/badge/skills/ditingdapeng/thinkinglearning/first-principles-skills/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.
<a href="https://agentmods.dev/skills/ditingdapeng/thinkinglearning/first-principles-skills"><img src="https://agentmods.dev/badge/skills/ditingdapeng/thinkinglearning/first-principles-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00083 | $0.03526 |
| Opus 5.5 | $0.00033 | $0.01410 |
| Sonnet 5.5 | $0.00017 | $0.00705 |
| Haiku 4.5 | $0.00008 | $0.00353 |
Grade A, and why
first-principles-skills 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 1mo 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
20 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.
- courses/李善友课程（一）刻意练习三步骤：业余选手与高手的本质区别【更新请加微信dedao5208】.txt 34 KB
- courses/李善友课程（七）整个工业革命和工商管理都建立在牛顿世界观之上.txt 31 KB
- courses/李善友课程（三）李善友教授如何从读书中学习？.txt 19 KB
- courses/李善友课程（九）第一性原理如何影响政治经济.txt 10 KB
- courses/李善友课程（二）李叫兽与芒格的思维模型学习法.txt 25 KB
- courses/李善友课程（五）第一性原理背后的哲学基石.txt 26 KB
- courses/李善友课程（八）创新建立在达尔文世界观之上.txt 26 KB
- courses/李善友课程（六）如何发现第一性原理？.txt 23 KB
- courses/李善友课程（十）如何像巴菲特一样思考？.txt 29 KB
- courses/李善友课程（十一）孙正义如何用时光机模型赢得科技浪潮.txt 19 KB
- courses/李善友课程（十三）从递弱代偿原理中推导出非连续性模型.txt 34 KB
- courses/李善友课程（十二）马斯克的物理学思维与方法论.txt 40 KB
- courses/李善友课程（四）第一性原理是使用演绎法的推理基石.txt 26 KB
- references/examples.md 7.9 KB
- references/feynman-method.md 5.9 KB
- references/questioning-templates.md 7.6 KB
- references/quickref.md 3.0 KB
- templates/profile.json 238 B
- templates/progress.json 3.3 KB
- templates/user_think_log.md 429 B
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.
- 1mo ago First seen · 354 lines · 83 tokens per session scan A 323dc25fa161
first-principles-skills is a skill published in the GitHub repository ditingdapeng/ThinkingLearning (11 stars, last pushed 8mo ago), with no licence file. It adds 83 tokens to every session and 3,526 once invoked, about $0.0003 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.
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