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
Product Design & UX / Other Product, Design and Learning Materials

Airbnb Design Language and Historical Releases (2021–2025 Quarterly Release Timeline + DLS Design System + Trust/Belonging Design)

Design highlights from 11 quarterly product Releases of Airbnb from Summer 2021 to Summer 2026, breaking down "why Airbnb designs this way" from a product manager perspective. Two main threads: ① Timeline — 2021 Flexible search + 10-step host onboarding / 2022 Categories system (50+ themes) + Split Stays + free AirCover protection / 2023 Host Passport + total price transparency + Guest Favorite tag + AI photo tours + smart locks / 2024 Icons celebrity immersive experiences + shared wishlists + Co-host marketplace / 2025 Services value-added services + Experiences local experiences + Connections social relationships + task-based AI customer service / 2026 lifestyle services (groceries/transfers/luggage storage/car rentals) + boutique hotels + AI review summaries and comparisons + travel maps. ② Transferable insights — how Airbnb does "dual-track narrative Releases" (every feature communicates both UX value and business value at the same time), how trust is designed into the product (AirCover/identity verification/Guest Favorite/Host Passport), how belonging evolves from "staying in someone else's home" to emotional connection (passport/social/shared itineraries), how the platform strategy evolves from a "booking tool" to an "end-to-end travel and lifestyle platform", and the three overarching threads of flexibility, personalization, and AI. Audience = non-technical PMs; jargon is explained within the industry; each section includes Why and counterexamples; instead of restating feature lists, it distills design motivations.

AirbnbTrust DesignProduct LaunchEnglish edition
Product Design & UX / Other Product, Design and Learning Materials

Shape of AI AI Product UX Pattern Library (Seven Major Categories: Wayfinders/Inputs/Tuners/Identifiers/Governors/Trust/Dark Patterns + Design Guidelines)

A self-contained bilingual essence of Emily Campbell’s *Shape of AI* AI product UX pattern library (all 49 .md files fully read), reorganized into 36 specific patterns across 7 categories plus 1 set of overarching design guidelines, following a queryable structure of “Pattern Name → What Problem It Solves → How to Use It → Examples”. The seven categories are: ① Wayfinders (4 patterns: Follow up / Nudges / Suggestions / Templates) — solves the problem of new users not knowing how to use a blank input box; ② Inputs (8 patterns: Open input / Auto Fill / Inline action / Madlibs / Remix-Blend / Summary / Synthesis / Token layering) — feeds user intent and context to the AI; ③ Tuners (8 patterns: Filters / Parameters / Inpainting / Model management / Personal voice / Primary sources / References RAG / Workflows) — lets users fine-tune or restructure results; ④ Identifiers (6 patterns: Color scheme purple-green / Symbols icons ✨🔮🤖 / Name / Personality / Disclosure / Initial CTA) — distinguishes AI content from human content; ⑤ Governors (9 patterns: Citations / Controls stop/continue / Footprints / Prompt transparency / Regenerate / Sample response / Show the work / Token transparency / Variations) — preserves user agency and explainability while the AI works; ⑥ Trust indicators (3 patterns: Incognito / Memory management / Watermarks C2PA); ⑦ Dark matte hidden patterns (3 patterns: Data Ownership / Caveat disclaimer buck-passing / Rating) — gray-area designs that are questionable or erode trust. For PMs building AI chat or interactive narrative products: this is a quick reference manual for “which pattern to look up when you encounter interaction problem X next time”, with emphasis on Why / When to use / Counterexamples. It complements nngroup-ai-ux-design — the latter offers NNGroup’s conversational interface research perspective (6 types of conversation / no fluff / anthropomorphism / sycophancy), while this piece presents Shape of AI’s perspective as a “reusable UI pattern parts library”.

AI UXInteraction PatternsTrust DesignEnglish edition