Weather-aware alternatives

[neldroid]

Goal

Weather-aware alternatives: when rain, heat or poor air quality is forecast for an outdoor workout, surface the plan's bad_weather alternative, or propose one.

Ideas

• A weather adapter using an open API without mandatory keys (for example Open-Meteo). Verify its terms and attribution requirements.
• Send coarse coordinates only, and cache forecasts.
• Possible designs, to be decided in an RFC:
  • a new adjustment metric such as weather.precip_probability or weather.apparent_temp_max, plus an action swap_to_alternative;
  • or a weather_check tool that prompts use before presenting each day.
• Heat safety: link to public heat-health guidance, and never give medical advice.

Done when

• An RFC with privacy and safety sections, an adapter with fixtures, tests, and updated prompts.