Add Daily briefing JSON generation

internal/cli/root_test.go

@@ -3,6 +3,10 @@ package cli
 import (
 	"bytes"
 	"context"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -67,6 +71,35 @@ func TestRunGenerateReturnsNotImplementedAfterResolution(t *testing.T) {
 	}
 }
 
+func TestRunGenerateDailyWritesBriefing(t *testing.T) {
+	server := dailyServer(t)
+	configPath := filepath.Join(t.TempDir(), "config.yml")
+	if err := os.WriteFile(configPath, []byte("weather_api:\n  base_url: "+server.URL+"/\n  timezone: America/Chicago\n"), 0o600); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+	outPath := filepath.Join(t.TempDir(), "daily.briefing.json")
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	runner := Runner{Clock: fixedClock()}
+
+	err := runner.Run(context.Background(), []string{
+		"generate", "daily",
+		"--config", configPath,
+		"--date", "2026-05-29",
+		"--out", outPath,
+	}, &stdout, &stderr)
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	data, err := os.ReadFile(outPath)
+	if err != nil {
+		t.Fatalf("read briefing: %v", err)
+	}
+	if !strings.Contains(string(data), `"schemaVersion"`) || !strings.Contains(string(data), `"daily_today"`) {
+		t.Fatalf("briefing output missing expected content:\n%s", string(data))
+	}
+}
+
 func TestResolveGenerateCommands(t *testing.T) {
 	runner := Runner{Clock: fixedClock()}
 	tests := []struct {
@@ -190,3 +223,27 @@ func TestResolveRunRejectsOutputFlag(t *testing.T) {
 func fixedClock() timeutil.Clock {
 	return timeutil.FixedClock{Time: time.Date(2026, 5, 29, 12, 0, 0, 0, time.UTC)}
 }
+
+func dailyServer(t *testing.T) *httptest.Server {
+	t.Helper()
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/observations":
+			_, _ = w.Write([]byte(`{"data":{"timestamp":"2026-05-29T14:00:00Z","conditionCode":3}}`))
+		case "/conditions/current":
+			_, _ = w.Write([]byte(`{"data":{"conditionText":"Clear"}}`))
+		case "/forecast/hourly":
+			_, _ = w.Write([]byte(`{"data":{"locationId":"test-grid","locationName":"Testville","issuedAt":"2026-05-29T10:30:00-05:00","product":"hourly","periods":[{"startTime":"2026-05-29T06:00:00-05:00","endTime":"2026-05-29T07:00:00-05:00","textDescription":"Showers and thunderstorms","temperatureF":66,"probabilityOfPrecipitationPercent":80,"windGustMph":32}]}}`))
+		case "/forecast/narrative":
+			_, _ = w.Write([]byte(`{"data":{"issuedAt":"2026-05-29T10:30:00-05:00","product":"narrative","periods":[{"startTime":"2026-05-29T06:00:00-05:00","endTime":"2026-05-29T18:00:00-05:00","textDescription":"Morning storms, then partly sunny."}]}}`))
+		case "/alerts/active":
+			_, _ = w.Write([]byte(`{"data":{"alerts":[]}}`))
+		case "/discussion":
+			_, _ = w.Write([]byte(`{"data":{"product":"discussion","issuedAt":"2026-05-29T09:25:00-05:00","keyMessages":["Storms are most likely during the morning."]}}`))
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	t.Cleanup(server.Close)
+	return server
+}