docs: update CHANGELOG for v6.0.0 stable release

V6 Stable Release! The End of Beta!

CHANGELOG.md

@@ -1,5 +1,40 @@
 # Changelog
 
+## [6.0.0]
+
+V6 Stable Release! The End of Beta!
+
+### 🎁 Features
+
+* Add PRD workflow steps 2b (vision/differentiators) and 2c (executive summary) for more complete product requirements documentation
+* Add new `bmad uninstall` command with interactive and non-interactive modes for selective component removal
+* Add dedicated GitHub Copilot installer that generates enriched `.agent.md`, `.prompt.md` files and project configuration
+* Add TEA browser automation prerequisite prompts to guide Playwright CLI/MCP setup after configuration
+
+### 🐛 Bug Fixes
+
+* Fix version comparison to use semantic versioning, preventing incorrect downgrade recommendations to older beta versions
+* Fix `--custom-content` flag to properly populate sources and selected files in module config
+* Fix module configuration UX messaging to show accurate completion status and improve feedback timing
+* Fix changelog URL in installer start message for proper GitHub resolution
+* Remove incorrect `mode: primary` from OpenCode agent template and restore `name` field across all templates
+* Auto-discover PRD files in validate-prd workflow to reduce manual path input
+* Fix installer non-interactive mode hanging and improve IDE configuration handling during updates
+* Fix workflow-level config.yaml copying for custom content modules
+
+### ♻️ Refactoring
+
+* Remove alias variables from Phase 4 workflows, use canonical `{implementation_artifacts}` and `{planning_artifacts}`
+* Add missing `project_context` references to workflows for consistency
+
+### 📚 Documentation
+
+* Add post-install notes documentation for modules
+* Improve project-context documentation and fix folder structure
+* Add BMad Builder link to index for extenders
+
+---
+
 ## [6.0.0-Beta.8]
 
 **Release: February 8, 2026**