Reply to a passive-aggressive message without taking the bait

Help me reply to this passive-aggressive message.

Their message: [paste]
The real ask underneath if any: [my read]
What I need: [answer / bound / end thread]
Relationship: [details]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A calm sendable reply to the real point.
2. A grey-rock one-liner if engagement is unwise.
3. Bait phrases to leave unanswered.
4. A private vent I will not send.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts, quotes or what the other person thinks. Give a sendable version and, when I've pasted a vent, a one-line note on what you left out and why. This is help with wording, not legal advice. UK English.

Stay in this ChatGPT chat. Do not turn on apps or connectors, and do not use memory from another chat.