> ## Documentation Index
> Fetch the complete documentation index at: https://dev-doc.dualmindlab.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Latest updates, releases, and improvements to DualMind Lab — the blind AI model comparison arena.

# Changelog

All notable changes to DualMind Lab are documented here.

<Update date="2026-02-07" version="2.0.0">
  ## World-Class Documentation & AI Agent Support

  ### New Features

  * Interactive API playground with OpenAPI 3.0 specification
  * AI-agent optimized documentation with MCP server integration
  * Contextual menu — send any page to ChatGPT, Claude, or Perplexity
  * Comprehensive FAQ with 20+ questions
  * Product roadmap and contributing guide
  * Multi-language code examples (cURL, JavaScript, Python, Go, Java)
  * 12+ Mermaid architecture and data-flow diagrams

  ### Improvements

  * Enhanced admin panel with full CRUD for all entities
  * Provider health tracking and API key rotation
  * Improved error messages with correlation IDs
  * Better thread visibility controls (public, unlisted, private)
  * Custom fonts (Space Grotesk headings, Inter body)
  * Dark mode optimized with grid background

  ### Documentation

  * Complete `docs.json` rewrite with all Mintlify features
  * SEO meta tags on every page
  * `skills.md` and `llms.txt` for AI agent context
  * Deployment checklist with verification steps
</Update>

<Update date="2025-01-15" version="1.2.0">
  ## Topper Mode & Thread Sharing

  ### New Features

  * **Topper selection mode** — pairs top-performing model against random challenger
  * **Thread sharing** — public/unlisted visibility for conversations
  * **Feature flags** — runtime configuration via `system_settings` table
  * **Text-to-speech** — Groq-powered speech synthesis endpoint

  ### Bug Fixes

  * Fixed user sync race condition on thread creation
  * Improved fallback chain reliability (3-tier: primary → Groq alt → Bytez)
  * Fixed CORS handling for Cloudflare Worker proxy
  * Resolved vote counting for tie and both-bad choices

  ### Migration

  <Accordion title="Database migration required">
    ```sql filename="migration-v1.2.0.sql" theme={"theme":{"light":"github-light","dark":"github-dark-dimmed"}}
    ALTER TABLE threads ADD COLUMN IF NOT EXISTS visibility VARCHAR(20) DEFAULT 'private';

    CREATE TABLE IF NOT EXISTS system_settings (
      key VARCHAR(100) PRIMARY KEY,
      value TEXT NOT NULL,
      updated_at TIMESTAMPTZ DEFAULT NOW()
    );

    INSERT INTO system_settings (key, value)
    VALUES ('public_sharing', 'true')
    ON CONFLICT DO NOTHING;
    ```
  </Accordion>
</Update>

<Update date="2024-12-01" version="1.1.0">
  ## Arena Mode & Voting System

  ### New Features

  * **Dual-chat arena mode** — parallel model execution with blind comparison
  * **Voting system** — left, right, tie, and both-bad options
  * **Model leaderboard** — win/loss statistics and rankings
  * **SSE streaming** — real-time token streaming for single-chat

  ### Infrastructure

  * Cloudflare Workers deployment for frontend and admin
  * Azure App Service deployment for backend
  * Supabase PostgreSQL with service role access
  * JWT authentication with HS256 validation
</Update>

<Update date="2024-10-15" version="1.0.0">
  ## Initial Release

  First public release of DualMind Lab.

  * Single-chat endpoint with Groq provider
  * Thread and message persistence
  * User authentication via Supabase Auth (Google OAuth)
  * Admin panel with basic CRUD operations
  * Health check and ping endpoints
</Update>