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Thread ID Frontend Tool Round Trip

showcase/integrations/langgraph-python/qa/threadid-frontend-tool-roundtrip.md

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Thread ID Frontend Tool Round Trip

Scope

Regression checklist for ENT-658: a CopilotChat wrapped by CopilotChatConfigurationProvider must keep its SDK-generated non-explicit thread active across a frontend tool call and follow-up run.

Manual QA

  • Navigate to /demos/threadid-frontend-tool-roundtrip.
  • Verify the chat input is visible and Explicit threadId is unchecked.
  • Send invoke testFrontendToolCalling with label X.
  • Verify the user message remains visible.
  • Verify the testFrontendToolCalling card remains visible and shows label: X and result: handled X.
  • Verify the assistant reply Frontend tool finished for X. appears.
  • Verify the chat does not return to the empty state.
  • Refresh the page or open a new tab, check Explicit threadId before sending any message, send the same prompt again, and verify the same message/tool/reply persistence behavior.
  • Optionally toggle Explicit threadId after a generated-thread conversation and verify the chat switches to the explicit thread's history. An empty explicit thread on first use is expected.

Automated Coverage

  • tests/e2e/threadid-frontend-tool-roundtrip.spec.ts covers the demo route, generated-thread default state, and explicit-thread toggle.
  • packages/react-core/src/v2/components/chat/__tests__/CopilotChat.absentThreadConnect.test.tsx covers the SDK-generated thread handoff at the component level.