init

lib/weather/providers/openweather/index.ts

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+import { readKey } from "../../http";
+import type { WeatherProvider } from "../../types";
+import { getFreeForecast } from "./free";
+import { getOneCallForecast } from "./onecall";
+
+/**
+ * OpenWeather (the default provider).
+ *
+ * Set OPENWEATHER_PLAN in .env.local:
+ *   free     (default) → 5 days in 3-hour steps
+ *   onecall            → One Call 4.0: 48 hours hourly + daily, plus dew point and UV
+ */
+const usesOneCall = () => process.env.OPENWEATHER_PLAN === "onecall";
+
+export const openWeather: WeatherProvider = {
+  id: "openweather",
+  label: "OpenWeather",
+  envKey: "OPENWEATHER_API_KEY",
+  signupUrl: "https://home.openweathermap.org/users/sign_up",
+  limits: () => (usesOneCall() ? { forecastDays: 8, hourlyStepHours: 1 } : { forecastDays: 5, hourlyStepHours: 3 }),
+
+  getForecast(lat, lon) {
+    const key = readKey("OPENWEATHER_API_KEY");
+    return usesOneCall() ? getOneCallForecast(lat, lon, key) : getFreeForecast(lat, lon, key);
+  },
+};