• [CHANGE] Promote --storage.tsdb.allow-overlapping-blocks flag to stable. #9117
• [CHANGE] Promote --storage.tsdb.retention.size flag to stable. #9004
• [FEATURE] Add Kuma service discovery. #8844
• [FEATURE] Add present_over_time PromQL function. #9097
• [FEATURE] Allow configuring exemplar storage via file and make it reloadable. #8974
• [FEATURE] UI: Allow selecting time range with mouse drag. #8977
• [FEATURE] promtool: Add feature flags flag --enable-feature. #8958
• [FEATURE] promtool: Add file_sd file validation. #8950
• [ENHANCEMENT] Reduce blocking of outgoing remote write requests from series garbage collection. #9109
• [ENHANCEMENT] Improve write-ahead-log decoding performance. #9106
• [ENHANCEMENT] Improve append performance in TSDB by reducing mutexes usage. #9061
• [ENHANCEMENT] Allow configuring max_samples_per_send for remote write metadata. #8959
• [ENHANCEMENT] Add __meta_gce_interface_ipv4_<name> meta label to GCE discovery. #8978
• [ENHANCEMENT] Add __meta_ec2_availability_zone_id meta label to EC2 discovery. #8978
• [ENHANCEMENT] Add __meta_azure_machine_computer_name meta label to Azure discovery. #9112
• [ENHANCEMENT] Add __meta_hetzner_hcloud_labelpresent_<labelname> meta label to Hetzner discovery. #9028
• [ENHANCEMENT] promtool: Add compaction efficiency to promtool tsdb analyze reports. #8940
• [ENHANCEMENT] promtool: Allow configuring max block duration for backfilling via --max-block-duration flag. #8919
• [ENHANCEMENT] UI: Add sorting and filtering to flags page. #8988
• [ENHANCEMENT] UI: Improve alerts page rendering performance. #9005
• [BUGFIX] Log when total symbol size exceeds 2^32 bytes, causing compaction to fail, and skip compaction. #9104
• [BUGFIX] Fix incorrect target_limit reloading of zero value. #9120
• [BUGFIX] Fix head GC and pending readers race condition. #9081
• [BUGFIX] Fix timestamp handling in OpenMetrics parser. #9008
• [BUGFIX] Fix potential duplicate metrics in /federate endpoint when specifying multiple matchers. #8885
• [BUGFIX] Fix server configuration and validation for authentication via client cert. #9123