Summarize an email thread into action items

Your task

1. Read the full thread, including the replies that add new information.
2. List every distinct action item that's still open, with who owns it if stated.
3. Exclude anything explicitly marked as already done or not needed.

Prompt idea:

Here's an email thread about launch readiness. List every distinct open action item, who owns it (if mentioned), and leave out anything explicitly marked as already handled.