fix(drive-thru): assume unstated quantity is one

[rosetta-livekit-bot]

Summary

Ports livekit/agents#6463 to the JS drive-thru example prompt.

The drive-thru agent now treats an unstated quantity as one, while continuing to avoid assuming other missing order details.

Source diff coverage

Coverage classification

Source file	Classification	Target file	Notes
examples/drive-thru/database.py	Ported	examples/src/drive-thru/database.ts	Ported the prompt behavior to the TypeScript counterpart. Adapted Python string-concatenation wording into the target's existing template literal and prompt structure: added unstated quantity = one, and narrowed the no-assumptions rule to details other than quantity.

No source tests were added or modified in livekit/agents#6463, so no tests were ported.

Validation

• pnpm exec turbo run build --concurrency=1 passed.
• pnpm lint passed with existing warnings.
• pnpm format:check passed.
• pnpm --filter livekit-agents-examples lint passed with existing warnings.
• pnpm --filter livekit-agents-examples build initially failed before dependent package artifacts existed, then passed as part of the successful full build.
• pnpm --filter livekit-agents-examples test failed in existing LLM-driven tests after dependencies were built:
  • src/testing/agent_task.test.ts: missing expected FunctionCallOutputEvent after captureEmail handoff.
  • src/drive-thru/test_agent.test.ts: should handle ordering multiple sauces added both mayonnaise sauces, but the last event was a tool output rather than the expected assistant confirmation.
  • One OpenAI inference request timed out during the drive-thru test run.

---

Ported from livekit/agents#6463

Original PR description

Summary

test_consecutive_order has flaked twice on main in the last week (runs 29438348555 and 29261765536, both on commits unrelated to the drive-thru eval). In both cases the model responded to "Can I get a keychup sauce and a McFlurry Oreo ?" with a clarifying question ("Just to check, did you want just one of each?") instead of calling order_regular_item, so contains_function_call found no tool call.

#6383 fixed the stated-quantity variant of this ("two mayonnaise sauces" → add twice without confirming). This extends the same instruction bullet to cover the unstated-quantity case: if no quantity is stated, assume one and add the item without confirming the count.

Testing

Ran examples/drive-thru/test_agent.py::test_consecutive_order 4 times locally with the change — 4/4 passed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: a8cc10f

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.