1.16.0
Task Queue Fairness (Pre-release)
This release adds support for Task Queue Fairness. Fairness is a new feature of Temporal's task queues that allows for more control over the order that tasks are dispatched from a backlog. It's intended to address common situations like multi-tenant applications and reserved capacity bands.
Nexus cancellation types (Pre-release)
A cancellation type can now be set when starting a nexus operation. This determines the behavior of the Nexus operation when the caller workflow initiates cancellation. See the NexusOperationCancellationType enum.
💥 Changes to execute_child_workflow API
In order to align execute_child_workflow with start_child_workflow and make ChildWorkflowConfig usable for both, the summary argument has been replaced with static_summary. See (#1019)
💥 Plugin Changes (Experimental Feature)
The plugin interface has been changed. Implementors now have to implement each method so as to consider whether they need to make any customizations in those areas. In addition, the plugin has new methods which allow customization of a Replayer. See (#1011)
Specific Changes
2025-07-29 - 3244f8b - Fix readme to work with plugins (#1008)
2025-07-29 - 3f93a68 - Update README for OpenAI Agents SDK Integration (#1001)
2025-07-29 - 62604ca - announcement (#1010)
2025-08-04 - 1573433 - make profile optional, necessary for rust core to create fallback profile (#1004)
2025-08-04 - 3777095 - Fix start_activity overloads (#1014)
2025-08-04 - 7e1c725 - 💥 Update activity and workflow config objects. Change execute_child_workflow summary argument to static_summary (#1019)
2025-08-04 - b59c555 - Add plugin to workflowenvironment (#1015)
2025-08-06 - 71ed93c - 💥 Replayer configuration from plugins (#1011)
2025-08-08 - 11c2817 - Nexus: eliminate unused arguments (#1022)
2025-08-12 - e1016bc - Cleanup tests to deduplicate static response construction (#1023)
2025-08-15 - 2cea1a2 - Add first_execution_run_id to workflow info (#1027)
2025-08-15 - e9d8c1a - remove address check (#1030)
2025-08-16 - 49c2400 - Fix circular import: do not import temporalio.client in temporalio.nexus (#973)
2025-08-18 - 916ea3c - Fixes for new metrics interface (#940)
2025-08-18 - e2c0ced - Implement get_task_factory (#1031)
2025-08-19 - 9054679 - Respond to upstream: nexus start sync failure (#1026)
2025-08-19 - a09bb85 - Fairness Keys & Weights (#1036)
2025-08-20 - 2b5de91 - Move model stub creation from RunConfig to Agent (#1029)
2025-08-20 - 3c6fae6 - Bump slab from 0.4.10 to 0.4.11 in /temporalio/bridge (#1034)
2025-08-20 - 5080b68 - Don't add startActivity, etc spans when there is no parent trace in which to nest them (#1037)
2025-08-21 - 55d5d7c - Priority Key None by default (#1044)
2025-08-21 - 826edfd - Extend test timeout to 15 minutes. Macos-intel is running over (#1042)
2025-08-21 - a0147d5 - Nexus cancellation types (#981)
2025-08-21 - eb9097d - Bump version