add on conflict options for standalone activities#764
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add on conflict options for standalone activities#764
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bergundy
approved these changes
Apr 14, 2026
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What changed?
Added a new OnConflictOptions message to temporal.api.activity.v1 and a corresponding on_conflict_options field to StartActivityExecutionRequest.
Why?
When StartActivityExecution uses ACTIVITY_ID_CONFLICT_POLICY_USE_EXISTING and a matching activity is already running, the caller needs a way to specify what should be attached to the existing activity (request ID, completion callbacks, links). This mirrors the existing OnConflictOptions for workflows (temporal.api.workflow.v1.OnConflictOptions on StartWorkflowExecutionRequest) but is specific to the activity domain.