diff --git a/TEST_SUITE_MODERNIZATION_PLAN.md b/TEST_SUITE_MODERNIZATION_PLAN.md
index a4bebfa8..41f2ffff 100644
--- a/TEST_SUITE_MODERNIZATION_PLAN.md
+++ b/TEST_SUITE_MODERNIZATION_PLAN.md
@@ -1,9 +1,9 @@
 # WebSocket-Node Test Suite Modernization Plan
 
-**Status:** 91% Complete ✅
+**Status:** 95% Complete ✅
 **Last Updated:** October 6, 2025
-**Current Phase:** Phases 1-4 Complete + Phase 5 Browser Testing + Phase 6 Multi-Version CI
-**Latest Milestone:** Multi-Version Node.js Testing Complete (18.x, 20.x, 22.x all passing)
+**Current Phase:** Phases 1-4, 6 Complete + Phase 5 E2E Testing (70%)
+**Latest Milestone:** Phase 6 Complete - Codecov Integration (Coverage reporting, multi-version testing, performance benchmarks)
 
 ---
 
@@ -36,7 +36,7 @@ This document tracks the comprehensive modernization of the WebSocket-Node test
 
 ## Current Status
 
-### Overall Progress: 91% Complete ✅
+### Overall Progress: 95% Complete ✅
 
 ```
 Phase 1: Foundation Setup             ✅ 100% Complete
@@ -44,7 +44,7 @@ Phase 2: Test Migration & Helpers     ✅ 100% Complete
 Phase 3: Component Testing            ✅ 100% Complete (Coverage target achieved!)
 Phase 4: Integration Testing          ✅ 100% Complete
 Phase 5: E2E Testing                  ✅  70% Complete (Autobahn + Browser Testing)
-Phase 6: CI/CD Optimization           ✅  75% Complete (Multi-Version Testing)
+Phase 6: CI/CD Optimization           ✅ 100% Complete (Coverage Reporting + Multi-Version Testing)
 ```
 
 ### Test Execution Status
@@ -772,13 +772,22 @@ test/
 
 **File:** `.github/workflows/websocket-tests.yml`
 
-### 6.2 Coverage Reporting - NOT STARTED
+### ✅ 6.2 Coverage Reporting - COMPLETE
 
-**Needed:**
-- [ ] Codecov integration
-- [ ] PR coverage diff comments
-- [ ] Coverage badges in README
-- [ ] Coverage threshold enforcement (target: 85%+)
+**Status:** Complete
+**Completion Date:** October 6, 2025
+
+**Implemented:**
+- ✅ Codecov integration via codecov-action@v5
+- ✅ PR coverage diff comments (configured with require_changes: yes)
+- ✅ Coverage badge in README (v2 branch)
+- ✅ Coverage threshold enforcement (85% project, 80% patches)
+- ✅ Coverage upload on Node.js 22.x only to avoid duplication
+
+**Files:**
+- `.github/workflows/websocket-tests.yml` - Coverage generation and upload
+- `codecov.yml` - Coverage targets and PR comment configuration
+- `README.md` - Codecov badge display
 
 ### ✅ 6.3 Performance Regression Detection - COMPLETE
 
@@ -1064,16 +1073,19 @@ Lines:           85.05% ✅
 
 ## Quick Reference
 
-**Current Phase:** CI/CD Optimization - Multi-Version Testing
-**Current Sprint:** Complete Phase 6 remaining items (Coverage reporting, Performance benchmarks)
+**Current Phase:** Phase 6 Complete ✅ - Only Phase 5 E2E remaining (70% complete)
+**Current Sprint:** N/A - Phase 6 complete, Phase 5 remaining items are optional enhancements
 **Tests Passing:** 1,145/1,145 (100%) - 616 unit + 35 integration + 12 browser + 517 Autobahn
 **Coverage:** 85.05% overall (Target: 85%+) ✅ **ACHIEVED**
-**Next Milestone:** Coverage reporting integration, finalize v2.0 release preparation
-**Estimated Completion:** 1 week
+**Next Milestone:** v2.0 release preparation - Phase 6 complete
+**Estimated Completion:** Ready for v2.0 release
 
 **Recent Achievements:**
+- ✅ **Codecov integration complete** (PR #499)
+- ✅ Coverage reporting with PR comments and badges
+- ✅ Coverage threshold enforcement (85% project, 80% patches)
 - ✅ Multi-version Node.js testing (18.x, 20.x, 22.x all passing)
-- ✅ All 628 tests passing across all Node.js versions
+- ✅ Performance benchmarking with formatted GitHub Actions output
 - ✅ Playwright browser testing infrastructure complete
 - ✅ 85%+ coverage target achieved (85.05%)
 - ✅ Autobahn protocol compliance (517 tests, 100% pass rate)