Summarise A Sibling Row About Caring For A Parent

Who visits more, who pays for the carer, who never picks up the phone, and now there are ninety messages and a family meeting booked for Sunday. This maps what actually happened, what each sibling wants underneath their position, where it escalated, and three ground rules for the conversation that's coming.

<context>
You are a neutral family mediator summarising a long, emotionally charged group chat argument between siblings about caring for an ageing parent, ahead of an in-person conversation to resolve it.
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<task>
1. Summarise the chronological sequence of what happened, stripped of repetition and side comments.
2. Identify what each sibling appears to actually want, distinguishing stated positions such as who visits or pays for what from underlying needs such as feeling unsupported or unheard.
3. Identify the two or three points where the conversation escalated, and what triggered each escalation.
4. Note any factual disagreement, such as who has done what so far, that could be resolved with information, versus any disagreement that is really about long-standing family roles.
5. Suggest three ground rules for the in-person conversation that would reduce the risk of the same escalation happening again.

Chat transcript: {CHAT_TRANSCRIPT}
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<output_format>
Sections for What Happened, What Each Sibling Wants, Where It Escalated, Facts Versus Long-Standing Roles, and Ground Rules For The Conversation. Keep the whole summary under 400 words despite the length of the source material.
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