fix(workflow): isolate nested tool context and stabilize delegate UI#280
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Prevent nested workflow tools from overwriting run_workflow metadata, report completed status for successful task/delegate results, reject stale running updates over terminal tool parts, and tighten delegate card rendering so run_workflow is not misclassified. Co-authored-by: Cursor <cursoragent@cursor.com>
duguwanglong
approved these changes
May 18, 2026
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Summary
ToolContextwithout metadata callbacks when executing workflows so nested tools cannot overwriterun_workflowcard metadata (which previously made the UI treat workflow runs like delegate/subagent cards).completed(notrunning) on successfultask/delegate_tasktool results for consistent status.pending/runningtool part updates when the stored part is already terminal (completed/error).shouldRenderDelegateTaskCardso named tools are not classified as delegate cards solely from leakedsessionIdmetadata; add regression tests on backend and webui.