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+<!--
+Thank you for contributing to Roo Code!
+
+Before submitting your PR, please ensure:
+- It's linked to an approved GitHub Issue.
+- You've reviewed our [Contributing Guidelines](../CONTRIBUTING.md).
+-->
+
+### Related GitHub Issue
+
+Closes: #3186
+
+### Roo Code Task Context (Optional)
+
+_No Roo Code task context for this PR_
+
+### Description
+
+This PR implements comprehensive accessibility improvements for the @ context menu to make it fully accessible to screen readers. The issue reported that when users type '@' to trigger the file insertion context menu, the menu appears visually but is not announced by screen readers, making it inaccessible to users with visual impairments.
+
+**Key implementation details:**
+- Added proper ARIA roles (role="listbox" for menu, role="option" for items)
+- Implemented ARIA states (aria-expanded, aria-selected, aria-activedescendant)
+- Added live region for real-time announcements to screen readers
+- Enhanced keyboard navigation with proper focus management
+- Added descriptive labels and instructions for screen reader users
+
+**Design choices:**
+- Used aria-live="polite" to avoid interrupting screen reader flow
+- Positioned live region off-screen using standard screen reader techniques
+- Maintained existing visual design while adding semantic accessibility
+- Ensured announcements are contextual and informative
+
+### Test Procedure
+
+**Manual testing with screen readers:**
+1. Open VSCode with a screen reader (VoiceOver, NVDA, or JAWS)
+2. Focus on the chat input field
+3. Type '@' to trigger the context menu
+4. Verify screen reader announces: "File insertion menu opened"
+5. Use arrow keys to navigate menu items
+6. Verify each item is announced with position info (e.g., "File: example.txt, 1 of 5")
+7. Press Escape to close menu
+8. Verify screen reader announces: "File insertion menu closed"
+
+**Keyboard navigation testing:**
+- Arrow keys should navigate through selectable options
+- Enter/Tab should select the highlighted option
+- Escape should close the menu and return focus to textarea
+- Menu should maintain proper focus management
+
+### Pre-Submission Checklist
+
+- [x] **Issue Linked**: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
+- [x] **Scope**: My changes are focused on the linked issue (one major feature/fix per PR).
+- [x] **Self-Review**: I have performed a thorough self-review of my code.
+- [x] **Testing**: New and/or updated tests have been added to cover my changes (if applicable).
+- [x] **Documentation Impact**: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
+- [x] **Contribution Guidelines**: I have read and agree to the [Contributor Guidelines](/CONTRIBUTING.md).
+
+### Screenshots / Videos
+
+_No UI changes in this PR - accessibility improvements are semantic and announced by screen readers_
+
+### Documentation Updates
+
+- [x] No documentation updates are required.
+
+### Additional Notes
+
+**Accessibility standards compliance:**
+- Follows WCAG 2.1 AA guidelines for keyboard navigation and screen reader support
+- Implements WAI-ARIA best practices for listbox pattern
+- Uses semantic HTML and ARIA attributes appropriately
+
+**Technical considerations:**
+- Changes are backward compatible and don't affect existing functionality
+- Live region announcements are non-intrusive and contextual
+- Implementation follows existing code patterns and conventions
+
+### Get in Touch
+
+@roomote-agent
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