## What this models
Selling a property the household already owns: from the sale year onward the home (and any linked
mortgage and property-tax/payment expenses) stop, and the net proceeds land in cash or a taxable
brokerage balance.
## Maps to module(s)
- `sell_house_v1` — link the baseline property being sold (`source_property_position_id`) and, if it has
a mortgage, the `source_mortgage_position_id`. Set `proceeds` (net sale value) and where they land
(`proceeds_destination`: "cash" or "taxable").
## Information needed
- Which property is being sold (use a baseline property id from get_scenario_building_context).
- Sale year (within the planning horizon).
- Net proceeds amount (default to the property's value if the user doesn't specify).
- Where proceeds go: cash or taxable (default taxable).
## Defaults & assumptions
- If proceeds aren't given, default to the property's current value.
- If the home is mortgaged, link the mortgage so it stops at sale.
## Prerequisites
- A baseline property to sell. If the household has none, say a property is needed first.
## How to summarize to the user
"Sell {PROPERTY} in {YEAR}: net proceeds of about {AMOUNT} move to your {cash/taxable} balance."
Educational content only—not personalized investment, tax, or legal advice.