• [CHANGE] Don't allow calling qids with an empty ids list. #4707
• [FEATURE] Add mattermost integration. #4090
• [FEATURE] Add saturday to the first day of the week options. #4473
• [FEATURE] Add templating functions for working with urls. #4625
• [FEATURE] cluster: Allow persistent peer names. #4636
• [FEATURE] dispatch: Add start delay. #4704
• [FEATURE] provider: Add subscriber channel metrics. #4630
• [FEATURE] template: Add tojson function. #4773
• [FEATURE] Add api http metrics. #4162
• [FEATURE] Add distributed tracing support. #4745
• [FEATURE] Add names to inhibit rules. #4628
• [FEATURE] Add timeout option for pagerduty notifier. #4354
• [FEATURE] Add timeout option for slack notifier. #4355
• [FEATURE] Allow nested details fields in pagerduty. #3944
• [FEATURE] Implement phantom_threading to group email alerts into threads. #4623
• [FEATURE] gc: Report errors, but remove erroneous silences and continue. #4724
• [FEATURE] jira: Template customfields. #4029
• [FEATURE] jira: Allow configuring issue update via parameter. #4621
• [FEATURE] Slack app support. #4211
• [ENHANCEMENT] Add comment about smtp plain authentication. #4741
• [ENHANCEMENT] Add documentation about high availability. #4708
• [ENHANCEMENT] Add documentation for client_allowed_sans. #4706
• [ENHANCEMENT] Improve logging around webhook dispatch failure. #4511
• [ENHANCEMENT] Compile silence matchers when the silence is added. #4695
• [ENHANCEMENT] Fix 's/client/alerts_api/g' broken link in 0.29. #4718
• [ENHANCEMENT] Fix rocketchat_config docs. #4767
• [ENHANCEMENT] Fix: <mute_time_interval> was renamed. #4729
• [ENHANCEMENT] Improve inhibition performance. #4607
• [ENHANCEMENT] Loadsnapshot: update matcher index properly while not holding lock. #4714
• [ENHANCEMENT] Logging improvements. #4113
• [ENHANCEMENT] Move query locking back into private query function. #4694
• [ENHANCEMENT] Optimize the new inhibitor implementation for ~2.5x performance improvement. #4668
• [ENHANCEMENT] Reduce the time dispatch.group holds the mutex. #4670
• [ENHANCEMENT] Use b.loop() to simplify the code and improve performance. #4642
• [ENHANCEMENT] Remove duplicate slice during silences query. #4696
• [ENHANCEMENT] Silences: optimize incremental mutes queries via a silence version index. #4723
• [ENHANCEMENT] Update description for filter param in openapi. #4775
• [BUGFIX] Add new behavior to avoid races on config reload. #4705
• [BUGFIX] config: Fix duplicate header detection for all case variants. #2810
• [BUGFIX] marker: Stop state leakage from aggregation groups. #4438
• [BUGFIX] Fix pprof debug endpoints not working with --web.route-prefix. #4698
• [BUGFIX] Set context timeout for resolvepeers. #4343