Add Today planning module scaffold

internal/promptinput/package.go

@@ -40,6 +40,7 @@ var briefingStanzaCategories = map[string]string{
 	string(module.DerivedDaypartSummaries): categoryDerivedSummaries,
 	string(module.PrecipTiming):            categoryDerivedSummaries,
 	string(module.OutdoorWindows):          categoryDerivedSummaries,
+	string(module.TodayPlanning):           categoryDerivedSummaries,
 	string(module.TomorrowPlanning):        categoryDerivedSummaries,
 	string(module.NarrativeForecast):       categoryNarrativeProducts,
 	string(module.AreaForecastDiscussion):  categoryNarrativeProducts,

internal/promptinput/package_test.go

@@ -107,6 +107,7 @@ func TestBuildUsesNamedSnapshotStanzas(t *testing.T) {
 	req.Modules = snapshotWithOutputs(t,
 		module.Output{ID: module.Metadata, StanzaName: "metadata", Value: map[string]string{"run_id": req.Metadata.RunID}},
 		module.Output{ID: module.DerivedDaypartSummaries, StanzaName: "derived_daypart_summaries", Value: map[string]any{"days": []string{"2026-05-29"}}},
+		module.Output{ID: module.TodayPlanning, StanzaName: "today_planning", Value: map[string]any{"morning_readiness": []string{"routine"}}},
 	)
 
 	pkg, err := Build(req)
@@ -120,6 +121,9 @@ func TestBuildUsesNamedSnapshotStanzas(t *testing.T) {
 	if _, ok := pkg.Briefing.Values["derived_daypart_summaries"]; !ok {
 		t.Fatal("Briefing.Values[derived_daypart_summaries] missing")
 	}
+	if _, ok := pkg.Briefing.Values["today_planning"]; !ok {
+		t.Fatal("Briefing.Values[today_planning] missing")
+	}
 }
 
 func TestMarshalYAMLIsDeterministicAndGroupsNamedStanzas(t *testing.T) {