Changelog

A running history of how BuffettKnowledge has evolved.

2026-05-18v1.5

UI Polish & Cross-Reference Enhancement

  • TopBar navigation: upgraded to white background with border and scroll shadow for clearer visual separation
  • New "Links to This Page" sidebar module on every letter page — shows all concepts that reference the current letter
  • AdSense ad placements on letter detail pages: inline ad below title, sidebar ad at bottom
  • Full-site container width unified to max-w-7xl (1280px) across all 14 page types
  • Footer width fixed: max-w-content replaced with max-w-7xl, matching body container
  • About page: removed inner max-w-3xl constraint, full content width now used; text set to justify alignment
  • Blog link removed from sidebar navigation
2026-05-18v1.4

Branding & Navigation Refinement

  • Sidebar branding upgrade: "Buffett" in theme color, slogan "Built for value investors."
  • Favicon redesigned with lightbulb icon matching brand identity
  • Sidebar nav restructured: Home link added, Archive section renamed to Browse
  • AI Q&A moved from sidebar to top navigation bar (between Knowledge Graph and PDF Download)
  • New Changelog page added under About section
  • ShareToolbar added to every letter page with social sharing, copy link, print-to-PDF, and official source link
  • LetterInterpretation component: categorized Explore Further (Concepts / Companies / People)
2026-05-17v1.3

AI Q&A (RAG) + SEO Enhancements

  • AI Q&A feature launched with RAG architecture (retrieval-augmented generation)
  • Cloudflare Worker backend for OpenAI GPT-4o-mini integration
  • ChatWidget floating component + dedicated /ask page
  • JSON-LD structured data added across all pages (WebSite, Organization, Article, Person, etc.)
  • AdSense ad unit system integrated (header, sidebar, inline, footer placements)
  • Related Letters module added to company and person detail pages
  • Metadata numbers updated: 101 letters, 152 concepts, 71 companies, 17 people
  • public/ads.txt created for AdSense verification
2026-05-16v1.2

Knowledge Graph + Letter Interpretation

  • Interactive knowledge graph (Canvas force-directed graph, zero D3 dependency)
  • Homepage TOP ranking blocks: Top Concepts, Top Companies, Top People
  • Citation statistics engine (lib/citationStats.ts) for ranking by cited-in-letters count
  • Sidebar count badges on nav items showing real data totals
  • LetterInterpretation component: Overview, Key Takeaways, Sections, Explore Further
  • Warren Buffett added as a featured person in the database
  • All text justified with text-align: justify and hyphens: auto
2026-05-15v1.1

Data Expansion & Foundation

  • Letter count expanded from 68 to 101 total letters
  • Partnership letters (1956-1970): 37 letters added
  • Berkshire Hathaway letters (1971-2025): 62 letters added
  • Special letters (3): Buffett Partnership dissolution, 1999 Sun Valley, 2025 Farewell
  • Concept database expanded to 152 entries with cross-references
  • Company database expanded to 71 entries with investment timelines
  • People database: 17 key figures including Graham, Munger, Abel
2026-05-14v1.0

Initial Launch

  • BuffettKnowledge.com launched
  • Next.js 14 + TypeScript + Tailwind CSS stack
  • Letter archive with full-text search and year-based browsing
  • Concept tagging system with cross-reference tables
  • Company and people profiles with mention tracking
  • Random Buffett quote generator in top bar
  • PDF download hub for offline reading
  • Dark sidebar + warm parchment content area design system
Something missing? Let us know or open an issue on GitHub.