climate-window-defrost

Turn the window defrost on or off

Turn defrost on (or off) for a target window — front, rear, or all. Activating defrost for the front or all windows is never a single call: policy requires a fixed set of automatic supporting changes (fan, airflow, AC, and the window-closing that AC-on forces) to be applied in the same turn. Rear-only defrost has none of these requirements. Sometimes the target window is unstated, a control needed for the cascade is missing, or a window position can't be read. The same method handles all of these.

When this applies

"Turn on the front / rear / all-window defrost", "defrost the windshield", "clear the rear window", "turn the defrost off". This skill owns the defrost toggle and the supporting cascade that policy ties to it — do not treat fan/airflow/AC/window-close as out of scope here, because for front/all defrost they are mandatory parts of this operation. (If the user's request is purely about one of those settings on its own — e.g. "set the fan to 3", "point the air at my feet", "turn the AC on", "close my window" — that standalone request belongs to the dedicated climate/window skill; this skill performs them only as the defrost cascade.)

Tools

• get_climate_settings({}) — read current fan speed, airflow direction, AC status, and defrost status. Always read this first so each cascade step is applied only when its precondition is unmet.
• get_vehicle_window_positions({}) — read window positions. Needed for front/all defrost because the cascade turns AC on, which requires closing windows open more than 20%. A position field MAY return "unknown" — genuinely unverifiable, never assume it means closed/open.
• get_user_preferences({preference_categories:{vehicle_settings:{climate_control:true}}}) — read the climate-control preference whenever the cascade will set an airflow direction, because the user may have a preferred windshield-including direction for defrost that must override the bare default.
• set_window_defrost({defrost_window, on}) — the target action; vocabulary is FRONT, REAR, ALL. Defrost exactly the window named. FRONT and ALL trigger the cascade below; REAR does not.
• set_fan_speed({level}) — raise the fan to level 2 when it is below (cascade step). The tool or its parameter MAY be missing.
• set_fan_airflow_direction({direction}) — set a windshield-including direction (WINDSHIELD) when the current one doesn't include WINDSHIELD (cascade step). MAY be missing.
• set_air_conditioning({on}) — turn AC on when it's off (cascade step). MAY be missing.
• open_close_window({window, percentage}) — close windows open more than 20% after AC is turned on (cascade step). MAY be missing.