feat(weather): default to today only, add days parameter for multi-day requests

get_weather now returns 1 day by default (today) instead of a full 7-day
forecast. A new optional `days` parameter (1–8) lets the model request
more days when the user explicitly asks for a weekly forecast or specific
date range. Tool description updated to guide the model accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/services/tools.py

@@ -560,9 +560,9 @@ _CORE_TOOLS = [
         "function": {
             "name": "get_weather",
             "description": (
-                "Get the 7-day weather forecast. Pass a city/region name to look up any location, "
-                "or omit to get the user's configured home/work locations. "
-                "Returns temperature, precipitation, and conditions for each day."
+                "Get the weather forecast. By default returns today only — use days=7 when the user "
+                "explicitly asks for a multi-day forecast or 'this week'. "
+                "Pass a city/region name to look up any location, or omit to get the user's configured home/work locations."
             ),
             "parameters": {
                 "type": "object",
@@ -573,7 +573,14 @@ _CORE_TOOLS = [
                             "City, region, or country to look up — e.g. 'Portland, Oregon', 'Tokyo', 'home', 'work'. "
                             "Use 'home' or 'work' to get the user's saved locations. Omit for all saved locations."
                         ),
-                    }
+                    },
+                    "days": {
+                        "type": "integer",
+                        "description": (
+                            "Number of days to return (1–8). Default 1 (today only). "
+                            "Use 7 or 8 when the user asks for a weekly forecast or multiple days."
+                        ),
+                    },
                 },
                 "required": [],
             },
@@ -1917,6 +1924,7 @@ async def execute_tool(
             from fabledassistant.services.briefing_pipeline import _get_temp_unit
             from datetime import timezone as _tz
             location = (arguments.get("location") or "").strip()
+            num_days = max(1, min(8, int(arguments.get("days") or 1)))
             temp_unit = await _get_temp_unit(user_id)
 
             def _apply_unit(days: list[dict]) -> list[dict]:
@@ -1935,7 +1943,7 @@ async def execute_tool(
                 try:
                     lat, lon, label = await geocode(location)
                     raw = await _fetch_open_meteo(lat, lon)
-                    days = _apply_unit(parse_forecast(raw))
+                    days = _apply_unit(parse_forecast(raw))[:num_days]
                     return {"success": True, "data": {"locations": [{
                         "location_key": "query",
                         "location_label": label,
@@ -1951,7 +1959,7 @@ async def execute_tool(
             if location.lower() not in ("all", ""):
                 locations = [loc for loc in locations if loc["location_key"] == location.lower()]
             locations = [
-                {**loc, "days": _apply_unit(loc.get("days", [])), "temp_unit": temp_unit}
+                {**loc, "days": _apply_unit(loc.get("days", []))[:num_days], "temp_unit": temp_unit}
                 for loc in locations
             ]
             return {"success": True, "data": {"locations": locations}}