Changelog

Version history for VizAdvisor

1 Changelog

All notable changes to VizAdvisor are documented here.

1.1 [1.0.0] — February 2026

1.1.1 Added

1.1.1.1 Core Features

  • LLM-powered visualization recommendations — Upload CSV/JSON, select goal, receive structured recommendations (chart type, rationale, design decisions, code scaffold)
  • CSV/JSON upload — Drag-and-drop or paste; PapaParse for parsing
  • Auto column type inference — Quantitative, ordinal, nominal, temporal, geographic
  • Goal selector — Compare, trend, distribution, correlation, part-of-whole, geospatial, network, ranking
  • Parameter panel — Audience, chart library, interactivity, accessibility, extra notes
  • Streaming response — Progressive display of LLM output
  • Export — Copy to clipboard or download as Markdown/JSON

1.1.1.2 Analysis Features

  • Pre-visualization analysis — Optional statistical analysis before getting recommendations
  • Post-visualization analysis — Same analysis after recommendations
  • Analysis types — Descriptive, regression, power, mediation, factorial
  • Dual engine support — R or Python via server-side scripts
  • Analysis panel — Engine selector, analysis type, config forms per type

1.1.1.3 UI & UX

  • Dark mode — Theme toggle with persistent preference (localStorage)
  • GitHub link — Header link to repository (VITE_REPO_URL)
  • Lazy-loaded pages — Code splitting for HomePage, AdvisorPage, AboutPage
  • Responsive layout — Tailwind-based responsive design

1.1.1.4 Infrastructure

  • Express proxy server — /api/recommend (LLM), /api/analyze (R/Python)
  • Concurrent dev — npm run dev:full runs Vite + server
  • run.sh — One-command install, start, and open browser
  • Content Security Policy — CSP in index.html
  • Manual chunking — React, Prism, PapaParse in separate chunks

1.1.1.5 Output Components

  • RecommendationCard — Primary recommendation, rationale, data mapping
  • AlternativeOptions — Alternative chart options
  • DesignDecisionsPanel — Color, scale, annotations, accessibility
  • PitfallWarnings — Pitfalls and mitigations
  • FollowUpQuestions — Suggested follow-up questions
  • CodeSnippet — Syntax-highlighted code with copy button
  • MetaBadges — Confidence, goal category

1.1.1.6 Session & State

  • Session history — useSessionHistory for save/load (localStorage)
  • SessionContext — Pre/post analysis state, dataset.rows for analysis

1.1.2 Changed

  • AboutPage — Clarified data handling during analysis
  • Prompt templates — Integration of pre-analysis results when available
  • SessionContext — Added rows to dataset for analysis; preAnalysis, postAnalysis state

1.1.3 Security

  • API keys routed through proxy in production
  • CSP headers for XSS mitigation

1.2 Pre-1.0 (Scaffold)

  • Initial project scaffold (Vite + React)
  • Core architecture (ARCHITECTURE.md, PROMPT-DESIGN.md, DATA-VIZ-REFERENCE.md)
  • Basic components and services
  • Unit tests (columnTypeInferrer, chartTypeMapper, promptTemplates, responseValidator)
  • Integration test (AdvisorFlow)