diff --git a/CHANGELOG.md b/CHANGELOG.md
index 704dbb9..f43ed28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.0.0] - 2026-04-08
+
+### Added
+- Shields.io badges in PR comments — `for-the-badge` hero badge with dynamic color for coverage/quality percentage
+- Threshold pass/fail badge (`flat-square` style) in PR comments
+- Per-file colored status icons (🟢 ≥90%, 🟡 ≥70%, 🔴 <70%)
+- Unicode progress bar (`████░░░░`) alongside the badge
+- `badge_color` Jinja2 filter mapping percentage to shields.io color scale
+- GitHub Pages documentation site with Schema.org structured data
+- `llms.txt` for AI tool discoverability (Claude, ChatGPT, Perplexity)
+- GitHub Pages deployment workflow
+- GitHub Discussions enabled
+- 15 repository topics for discoverability
+
+### Changed
+- **Breaking**: PR comment layout completely redesigned — comments now use shields.io badges, compact inline metrics, and a new visual hierarchy
+- Action name changed to "Diff Cover — PR Coverage & Quality Reports"
+- Action branding changed from check-circle/green to shield/blue
+- Compact inline metric layout replaces table-based metrics in PR comments
+- Step summary template redesigned to match new PR comment style
+- Integration test now dogfoods the action — posts real coverage comments on PRs
+- README overhauled with comparison table, badges, "Why This Action?" section, and supported tools table
+
+### Fixed
+- Action description trimmed to under 125 characters for GitHub Marketplace compatibility
+- Converted from Docker to composite action for faster execution
+
 ## [1.1.0] - 2026-04-08
 
 ### Added
diff --git a/action.yml b/action.yml
index e1c9ee8..37cd8f1 100644
--- a/action.yml
+++ b/action.yml
@@ -1,5 +1,5 @@
 name: 'Diff Cover — PR Coverage & Quality Reports'
-description: 'Diff coverage and quality reports for pull requests. PR comments, inline annotations, badges. Supports 13+ linters. No vendor lock-in.'
+description: 'Diff coverage and quality reports on pull requests. PR comments, annotations, badges. 13+ linters. No vendor lock-in.'
 
 inputs:
   # Mode