Signal to BuildSIGNAL TO BUILD中文Owner sign in ↗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.
A compilation of newtype’s methodology for super individuals: build capabilities through content and code, validate real demand with your first work, then test value with your first paying client; while accounting for energy, costs, and delivery boundaries.
Starting from reference images and user tasks, use AI to assist in generating UIs, extracting design rules, and filling in interactive states and microcopy; includes prompts and check paths, suitable for collaboration between product managers and designers.
Search Console basics, 5 core reports, Looker Studio dashboard (GSC + GA4 side by side), 7-step traffic drop diagnostic method, 4-quadrant bubble chart analysis, Google Trends keyword research and seasonality, and 8 reasons for discrepancies between GSC and GA. The complete tool stack for SEO data analysis.
After reaching the United States, Qu noticed rapid changes in how people discussed Chinese and American assets. He asks why two years of pessimism could reverse suddenly and how long new optimism might last.
Highlights from a large-scale Icon Association Ranking survey: 107 U.S. participants × 100 icons = 10,700 open-ended responses, covering the primary associated meaning, recognition rate percentage, and 95% confidence interval for each icon when presented alone, without text or context. Core finding: There is no such thing as a "Universal Icon" — no icon is consistently understood across all systems. Recognition rates fall into three tiers: 65–100% (high consensus, e.g., trash can = delete 98%, shopping cart = checkout 98%, pencil = edit 96%, envelope = mail 95%, circled question mark = help 91%, house = home 91%) / 50–64.9% (medium consensus, e.g., hamburger menu = menu only 59%, funnel = filter 53%) / 0–49.9% (weak consensus, e.g., share arrows, sparkles for AI, lifebuoy for help, AR cube). Coverage: survey methodology (two-stage testing: out-of-context vs. in-context) / three icon types (resemblance/metaphorical/arbitrary) and cognitive distance / 10 design principles (follow convention, single concept, consistent meaning, appropriate metaphor, etc.) + real-world counterexamples (Reddit wrench, TripIt star upgrade, Rippling heart for insurance, Lyft golf cart for shopping cart, DoorDash lifebuoy for help) / 8 factors affecting comprehension (consistency, interaction frequency, prior experience, proximity, text labels, orientation, placement, cultural background) / when text labels are mandatory / why emerging icons all fail (AI sparkles 0% recognition, heartbeat for data, lightning for charging 37%). Audience: product managers; jargon explained in plain language; every section includes Why + numbers + counterexamples.
Integration of IFS inner work from 2 perspectives. Wang Kai IFS Skill (Richard Schwartz 8C Self + three types of parts: Managers/Exiles/Firefighters + 7-step workflow + investment scenario application) / Wang Kai RSI practice (emotion management + emotions in decision-making). Covers IFS 7-step workflow, 8C Self qualities, identification of the three types of parts, and AI-assisted IFS exploration
Listen: 01:37–06:49; 17:19–19:51. Albert initially pursued platforms with strong scale and network effects. He tried two-dimensional interaction, mobile joystick controls, and game-like spaces. After building prototypes, he struggled to explain why users would choose them over existing games or Douyin. The eighty-versus-ninety comparison is a metaphor for relative quality, not measured scores.
A synthesis of retrospectives and failure cases from 3 perspectives. yitang Truman's in-depth retrospective (5 parts + 5-step method + 5 principles + 4 levels + AAR + quotes from Wang Xing / Liu Chuanzhi / Chairman Mao + Yu Lu's 5-year retrospective of Someet) / Wang Kai's 11 firsthand product failure lessons (FastFacts SEC / AiPathly / Quanta Quest / WhatsApp push / MJ for Feishu / AI smoking cessation / Squirrel Quick Read) + 6 failure modes / Xiaohongshu vibecoding pitfalls (0-80 vs 80-100 / Vibe Coding cleanup prophecy). Covers AAR 4 questions, 4-layer retrospective, 6 major categories of failure modes, and hidden pitfalls of Vibe Coding
The first half is a talk on low and high frequencies in investing; the second discusses AI, people and vitality. Zhang uses frequency for changing information, relationships and competition, and low-frequency signals for enduring problems and relatively stable values.
A fusion of inspiration and creativity from 3 perspectives. yitang Truman's complete Inspiration Flash system (4 stages + 6 Candies: Shuishui's book breakdown of *Flow* + deep work equipment + leg-shaking playlist + on-site flashes + tools section + AI prompts) / Xiaohongshu vibecoding creative healing (Huahua land series + Cyber Garden + AI news planting + Dancing Butterflies and Chirping Insects) + aesthetic philosophy (models don't matter, aesthetics do) / newtype Essays Dan Koe creator story. Covers inspiration scenarios, deep work, flow states, and dark time utilization
How to install and enable a Skill on the Claude.ai web app (simply upload the .md file), and what it means for PMs: A Skill is a preloaded "expert instruction manual" built into Claude. When you submit a task, the system automatically inserts the corresponding expert workflow into the context, so Claude works according to validated best practices instead of guessing. Division of content with newtype-skills-collection: that article covers Skill engineering (how to build a good Skill), while this article only covers the two-step install/enable process from the Claude.ai end-user perspective, plus when to use Skills and common pitfalls.
A personal assistant centers its owner. A colleague must understand the company, projects and recipients. Xu connects Kuse’s changes with internally deployed agents and Junior’s definition. Memory ownership, action boundaries and accounting distinguish the product from additional chat windows.
Organizes a Karpathy reading path by software paradigms, AI gadgets, nanochat, and knowledge workflows, links original practices and talk notes, and distinguishes the author’s own words, Chinese-community extensions, and historical predictions.
Understand the LLM OS analogy, the three software paradigms, and semi-autonomous products through notes on Karpathy’s Software 3.0 talk; provides direct chapter links, primary video entry points, and system-boundary explanations, while preserving existing interpretations.
The complete essence of all 28 UX laws and psychological effects from Jon Yablonski’s *Laws of UX* 2.0, distilling decades of experimental findings from cognitive psychology into actionable mantras that PMs can directly apply to design decisions. Grouped into 6 clusters by underlying intent: ① Cognitive Load (Cognitive Load / Working Memory / Miller's Law / Chunking / Tesler's Law (Law of Conservation of Complexity) / Occam's Razor / Law of Prägnanz) — The brain has limited processing power, so subtract ruthlessly and shift complexity from the user to the system. ② Decision Friction (Hick's Law / Choice Overload / Cognitive Bias / Paradox of the Active User) — More options lead to slower, more anxious decisions; framing and wording skew judgment; users never read manuals. ③ Gestalt Grouping (Proximity / Similarity / Common Region / Uniform Connectedness / Closure / Symmetry / Continuity) — The human brain automatically groups visual elements; use spacing, borders, and color to control “what belongs with what.” ④ Time Perception and Motivation (Doherty Threshold 400ms / Flow / Goal-Gradient Effect / Zeigarnik Effect / Parkinson's Law / Peak-End Rule / Serial Position Effect) — Users’ perceived speed, progress, and memory matter more than objective data. ⑤ Familiarity and Resilience (Jakob's Law / Mental Model / Postel's Law) — Users expect your product to work the same way as others’ products; be liberal in what you accept, conservative in what you send. ⑥ Attention and Aesthetics (Selective Attention / Banner Blindness / Von Restorff Effect / Aesthetic-Usability Effect / Pareto Principle 80/20) — Highlight what matters, avoid ad-like visual patterns, and remember that attractive things feel more usable. Each entry includes definition, psychological origin, how to apply it, counterexamples, and when to use it. Written for non-technical PMs, with in-line explanations of jargon, in bilingual Chinese-English format. Designed for quick recall of “which law to remember next time you encounter interface problem X.”
Integration of 3 perspectives on Lean Startup. yitang Truman lean experimentation (the six "most" wastes + 4 principles + stripping out assumptions + MVP design + systematic testing) + critical assumption Ω model + business milestones / Wang Kai's lessons from pitfalls (11 firsthand projects + overseas PMF validation) / Wang Huiwen's Tsinghua course (The Lean Startup is one of the 5 must-read books + massive advantage of iteration cycles). Covers critical assumption thinking, 4 types of MVP, Ω model, and systematic testing discipline
Read the historical interviews with Cat Wu, Alexander Embiricos, and Jenny Wen by role; verify the dates of the three episodes, distinguish guest experiences from editorial summaries and team practices, and provide links to the original episodes and acceptance entry points.
A synthesis of life direction frameworks from 3 perspectives. yitang Truman Life Red Dot (Red Nine Model + Napkin Diagnosis + Three Leaps + Five-Step Canvas + L1-L6 Levels + 100 Case Collection) / newtype Lao Huang (Super Individual Rich Definition + 5 Values + Workaholic Cage Self-Warning) / Kiyosaki Rich Dad Poor Dad (Assets and Liabilities + 6 Lessons + 4 Pillars + 5 Obstacles + Cashflow Game). Covers the 9 categories of the Red Nine Model, Want/Need/Can Venn diagram, Rich definition, and 6-lesson fundamentals
Cross-author evals topic summary. Anthropic's 4 key lessons (6 percentage point gap from infrastructure noise / eval awareness where models detect testing / take-home test lifespan / pass^k math) + academic school (full set of SWE-Bench / Terminal-Bench / τ2-Bench / BrowseComp / 𝜏2 / OSWorld / CORE-Bench) + practical perspectives from Wang Kai / Lao Huang / Cal Rueb. Framework selection (Harbor / Braintrust / LangSmith / Langfuse / Arize) + 14-item PM self-check checklist. This wiki is the "horizontal cross-author expansion" of [[anthropic-engineering-demystifying-evals]] (Phase A anchor / Anthropic single-source deep dive)
Comprehensive guide to LLM distributed training. llm-interview-distributed (9 PDFs / distributed overview + pipeline parallelism + DataParallel/DDP + torch.multiprocessing + AMP mixed precision + DeepSpeed + accelerate + ZeRO) + vLLM / inference optimization stack. Covers 4 major parallelism strategies (DP/MP/PP/TP), 3D Parallelism, three stages of ZeRO, and the mainstream Megatron + DeepSpeed stack