Expose only necessary context to a specialist during handoff

Goal

Pass only task-relevant information to a specialist and remove unrelated or sensitive content.

Steps

1. Identify the fields the specialist needs and mark secrets, credentials, and personal data. [openai-handoffs] [openai-context]
2. Use handoff(agent=..., input_filter=...) with HandoffInputData and explicitly filter input_history, pre_handoff_items, and new_items. [openai-handoffs] [openai-context]
3. Consider redaction separately for tool arguments, tool results, and ordinary message text; removing structured items alone is insufficient. [openai-handoffs] [openai-context]
4. Apply the filter at the handoff boundary while retaining enough information for the specialist. [openai-handoffs] [openai-context]
5. Use a test history with fake sensitive strings and verify the specialist receives only allowed fields. [openai-handoffs] [openai-context]

How to verify

Assert fake sensitive markers are absent from specialist input while required task facts remain.

Troubleshooting

If sensitive text remains, inspect ordinary message content and tool results as well as structured tool items.