KNOWLEDGE NOTES

Knowledge Notes

Explore curated knowledge, course notes and methods, with their existing content and sources preserved.

This index lists complete English editions. Additional Chinese notes and bilingual updates remain available in the Chinese index.

350knowledge notes
Personal Growth / Wang Kai

Wang Kai IFS Internal Family Systems AI-Assisted Practice + Claude Skill Definition

A practical guide to Richard Schwartz's Internal Family Systems (IFS) in the AI era, plus the accompanying Claude Skill bundle definition. Includes the complete 7-step workflow (Locate → Check for Self energy → Approach & Connect → Listen → Witness → Understand Needs → Settle & Close), three types of parts (Managers / Exiles / Firefighters), the 8 Cs of Self, and applications in investment scenarios (emotion management / loss aversion / decision anxiety / IFS psychological coaching).

IFSEmotion managementSelf-awarenessEnglish edition

Wang Kai RSI Investment Practical Case Collection + AI Value Investment Philosophy

A collection of practical applications of Wang Kai's RSI 7-day strategy framework. Includes in-depth research reports on 5 specific stocks/ETFs: BKNG / AMZN / QQQ / SPY / SONY, plus AI-era value investment philosophy (refined from 120+ rounds of internal Agent dialogues drawing on the wisdom of Buffett, Munger, and Duan Yongping), an AI-native investment paradigm framework, and a Prompt template for comprehensive analysis of a stock's intrinsic value. Demonstrates the full implementation of "Skill + Prompt + Multi-Agent Dialogue" in investment decision-making

Investment CasesValue InvestingAI Decision-MakingEnglish edition
Content Creation / Wang Kai

Wang Kai SillyTavern Video Production SOP (Skill Implementation Example)

A complete end-to-end SOP for mass production of product videos. Phases 1–7 engineering: directory skeleton → reference video analysis → real asset scraping → writing the Skill → first video → three video types + Jimeng mixed cuts → scaling. Demonstrates the core principle: "use code for precise effects, use text for broad rules."

Video productionProduction processAutomationEnglish edition
AI Product Practice / Wang Kai

Wang Kai: Analysis of Domestic AI Regulation and Localization Compliance

Evolution of domestic AI regulation recorded across 228 posts: blocking of overseas AI services such as MJ/SD, domestic large model filing, risks of shell-wrapped GPT, compliance of AI content ecosystem, regulatory milestones from the Cyberspace Administration of China/Ministry of Industry and Information Technology, why domestic to B is not very suitable, and cautious strategies of large companies

AI ComplianceLocalizationProduct StrategyEnglish edition
Indie Building / Wang Kai

Wang Kai's AI Coding Practice: From Cursor to Claude Code Terminal Workflow

The evolution path of AI Coding recorded across 385 posts: from a product manager who does not write code → using Cursor with a monthly cost of 50,000 USD → switching to the Claude Code terminal workflow → restructuring the basic collaboration process in the AI era. It emphasizes that "AI Coding is a foundational capability, not something for writing code."

AI ProgrammingClaude CodeDevelopment workflowsEnglish edition
AI Engineering / Wang Kai

Wang Kai's Claude Code Terminal Workflow Methodology (Full Version)

The complete engineering accumulation of Wang Kai's primary workflow for 2026. Terminal window as Agent / multi-model hybrid orchestration / Skill system / Feishu CLI collaboration bus / three-layer configuration hierarchy / Chrome MCP controlling real browsers / 10-minute patrol for long tasks / counter-consensus view "Claude subscription is the cheapest"

Claude CodeAgent SkillsEngineering workflowsEnglish edition

Wang Kai's Collection of Product Failure Postmortems

A collection of product failure cases personally experienced by Wang Kai. Pivoting to Telegram within 6 hours after WhatsApp push failed, 4 pitfalls behind the FastFacts PH failure, fundamental differences between overseas IM ecosystems and the WeChat ecosystem, and an IM selection decision tree for overseas-bound products. Avoiding pitfalls saves more money than taking the right path

Product RetrospectiveFailure casesMarket selectionEnglish edition

Wang Kai's Observations on AI Industry Judgments and the Competitive Landscape of Large Companies

790 posts spanning 3 years of observations on the competitive landscape of large AI companies: the evolution of OpenAI / Anthropic / Google / Apple / Microsoft / domestic Chinese players, Scaling Law / model capability grading / regulatory milestones / large model ecosystem boundaries / the AI hardware wave

AI Industry LandscapeIndustry judgmentCompetitive analysisEnglish edition

Wang Kai's RSI AI Investment Strategy and the "Good Asset, Good Price, Good Volatility" Framework

An evolution of value investing in the AI era distilled from 433 posts across 3 years, from FastFacts SEC automated trading to the RSI AI strategy: a three-layer framework of good asset + good price + good volatility, using AI as a ruler to quantify fuzzy risks, absolute rationality versus emotional decision-making, and a disciplined system delivering 4.3% quarterly returns

Value InvestingInvestment StrategyRisk ManagementEnglish edition
Product Design & UX / NNGroup User Experience

What’s the Difference Between UX, UI, and Usability? An Introduction to User Research and Design Tradeoffs

This article organizes foundational UX concepts from the Nielsen Norman Group, distinguishes user experience, user interface, and usability, explains how to select interviews, behavioral observation, and testing based on the problem, and covers how to choose between solutions using evidence.

UX FundamentalsUsabilityHuman-Centered DesignEnglish edition
Business & Entrepreneurship / 42 Zhangjing · Episode notes

When code becomes cheaper, organizations must shorten handoffs and own consequences

Listen: 02:04–09:25 and 40:57–41:53. Palona AI then provided telephone services for American restaurants, including reservations, orders, and inquiries. Ren reports 95–98% reliability without defining the task set, failures, or human transfers. The figure cannot establish a ranking against other agents.

42 ZhangjingEpisode analysisBusiness & EntrepreneurshipEnglish edition