# Cal.com v5.9.8 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.9.8
- **Released:** Dec 03, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.9.8/

## Executive Summary (TL;DR)
Cal.com v5.9.8. Source highlight: fix(ui): add missing checked state styling for event type checkbox

## New Features
- refactor: replace TRPCError with ErrorWithCode in `packages/features`
- feat: `CalendarView` atom v2
- docs: add automatic no show updated docs

## Improvements
- perf: Calendar Cache Improvements

## Bug Fixes
- fix(ui): add missing checked state styling for event type checkbox
- fix: Use booker locale for email verification email
- fix: getTeamIdsWithPermission return sub teams
- fix: styling override at availability settings
- fix: improve availability working hours layout spacing and editable heading icon gap
- fix: add no-availability message to v2 slots endpoint response