1.19.0

Sandbox Importing Changes

Modules imported after workflows have been loaded into the sandbox now produce a warning message by default. See the Import Notification Policy docs for more info and customization options.

OpenAI Agents Changes

• Add new upper bound of version 0.5.0 for openai-agents

Breaking Changes

• Python 3.9 support has been removed now that it has reached end of life status.
• Plugin interfaces have been updated to use invocation provided callables instead of initializers.
• MCPServerProviders now require a name argument.
• TestModel and TestModelProvider have been moved from temporalio.contrib.openai_agents to temporalio.contrib.openai_agents.test

Specific Changes

2025-09-30 - 4a70f3d - Update version to 1.18.1 (#1135)
2025-10-01 - a31886d - Serialization context (#1102)
2025-10-02 - 4f08626 - Use type in start/execute activity/workflow to address Pyright Strict mode error (#1137)
2025-10-06 - 26e2e61 - Generate RPC calls in Bridge Client (#1123)
2025-10-06 - 5ca4861 - Provide option to disable activity registration (#1140)
2025-10-07 - 42fe382 - Flaky session test (#1141)
2025-10-07 - 5e93e63 - 💥 Plugin Overhaul (#1139)
2025-10-07 - d27bb11 - Move visitor, bridge client generation, and formatting to poe tasks (#1142)
2025-10-07 - e4df5e7 - Add googleapis-common-protos to fix tests in build-binaries workflow (#1143)
2025-10-09 - cde3427 - Use macOS 15 intel runners (#1148)
2025-10-14 - 162cff7 - 💥 Allow arguments to be provided to MCP Server creation (#1147)
2025-10-14 - 70deb94 - Replace Proto modules with the python path (#1156)
2025-10-14 - 788d391 - Remove experimental notices for worker tuners (#1152)
2025-10-16 - 2ad41ab - Replace tctl references with Temporal CLI (#1165)
2025-10-16 - 2efd9a7 - Add start_update_with_start_workflow to Otel Interceptor (#1150)
2025-10-20 - 4fe685a - Allow h2 error message (#1170)
2025-10-20 - 778fc9a - Support python 3.14 and deprecate python 3.9 (#885)
2025-10-20 - f03ddc2 - Add programming language classifiers to fix badge on next publish (#1151)
2025-10-22 - 5994a45 - Avoid token detaching from different context (#1153)
2025-10-22 - c8cbfe0 - Modify code comment for Worker build_id field #1160 (#1163)
2025-10-24 - 7f794d0 - Update license in pyproject.toml (#1175)
2025-10-24 - 988b12c - Allow openai 0.4, update lock to use it (#1182)
2025-10-25 - 27903f7 - Add nightly throughput stress (#1173)
2025-10-27 - 231cc67 - Adds proper failure decoding in workflow activation (#1192)
2025-10-27 - 630a031 - Match openai logic to retry on >= 500 not == 500 (#1181)
2025-10-27 - 8f754b4 - Opentelemetry baggage propagation fix (#1174)
2025-10-27 - ba3d50f - Add a test for split worker scenario (#1193)
2025-10-27 - e39e8f2 - Add option to run models as local activities (#1183)
2025-10-28 - 0eb96eb - Sandbox importing (#1187)
2025-10-28 - c3448cc - Skip flaky test on versions with importer bug (#1195)
2025-10-29 - 1b70f07 - Tps nightly small improvements (#1200)
2025-10-30 - 35347b9 - Fix: Resolve TypeError in value_to_type on Python 3.13 (issue #1188) (#1189)
2025-10-30 - 5f24792 - 💥 Expose agent testing utils (#1164)
2025-10-30 - 660ac2b - VLN-492: Set explicit permissions for GitHub Actions workflows (#1199)
2025-10-30 - a08250a - refactor: use classmethod in factory methods (#1179)
2025-11-06 - 4156856 - fix: typo in time sandboxed utilities (#1205)
2025-11-06 - e543e8a - fix: typed search contains should work for falsy values (#1206)