diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8560a0d..fd2a586a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,25 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.0.0] - 2026-05-22
+
+### Added
+- **Official YouTube Data API v3 Integration**: Guaranteed 100% fidelity metadata extraction and elimination of bot-detection blocks.
+- **Robust Multimedia Hierarchy**: 3-tier fallback (Official API > yt-dlp > Gemini Pro Grounding) for high-fidelity technical summaries.
+- **Optional Cache Restoration**: Controlled via `restore_cache` flag across all V2 workflows to protect manual repository updates.
+- **Mandate 58 Codification**: "Official-First" protocol for multimedia and multiline rendering standards established in `GEMINI.md`.
+
+### Changed
+- **Standardized Workflow Sequencing**: Implemented a numeric 01-08 nomenclature for all 15 workflows to clarify the execution lifecycle (Discovery -> Integrity -> Enrichment -> Portal -> Metrics -> Deploy -> Safety -> Maintenance).
+- **Physical Workflow Refactoring**: Renamed all `.github/workflows/` files with numeric prefixes to enforce logical ordering in the GitHub Actions UI.
+- **O'Reilly Journey Architecture**: Prioritized "Fundamentals and Documentaries" in the Video Hub to provide a logical learning flow for users.
+- **Categorized Workflow Matrix**: Enhanced README section 9.1 with a "Phase / Category" column and direct clickable links to each workflow UI.
+
+### Fixed
+- **Persistent V2 Navigation**: Hardcoded Video Hub links in the V2 Index and navigation to ensure stability during automated regeneration.
+- **Markdown Rendering Hardening**: Resolved indentation bugs and Mandate 19 violations (blank lines around center tags) for pristine site visualization.
+- **YAML Syntax and Permissions**: Fixed duplicated keys in curation workflows and added `pull-requests: write` permissions for automated bot operations.
+
 ## [2.0.0-rc.18] - 2026-05-22
 
 ### Added
@@ -25,10 +44,3 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Bot Permissions**: Added `pull-requests: write` to V2 synchronization workflows to enable automated PR creation.
 
 ## [2.0.0-rc.17] - 2026-05-22
-
-### Changed
-- **Centralized YouTube Enrichment**: Standardized YouTube metadata extraction across all curation pipelines (V1 and V2). All workflows now fetch real titles and descriptions from YouTube to ensure high-fidelity AI summaries.
-- **Workflow Modularization**: Reverted the consolidation of the Video Hub into the Publisher pipeline, maintaining it as a standalone workflow (`agentic_v2_videos.yml`) for better operational flexibility.
-- **Improved Video Hub Design**: Redesigned the V2 Elite Video Hub with high-fidelity categorization, technology tags, and individual collapsible blocks for better user experience and flow.
-
-## [2.0.0-rc.14] - 2026-05-22