Add daily generated text assets

docs/internal/generatedtext.md

@@ -9,20 +9,21 @@ This document describes structured generated-text handling in
 generated-text-template reports and builds curated render contexts for
 templates. It also owns the generated-text catalog that connects report
 definitions to validators, render-context builders, schema assets, and template
-assets. The implemented contracts are Today Report, Tomorrow Report, and Hourly
-Report.
+assets. The implemented contracts are Daily validation and asset lookup, Today
+Report, Tomorrow Report, and Hourly Report.
 
 ## Inputs And Outputs
 
 Inputs:
 
-- raw GeneratedText JSON for Today, Tomorrow Report, or Hourly Report
+- raw GeneratedText JSON for Daily, Today, Tomorrow Report, or Hourly Report
 - report metadata from `internal/briefing`
 - a module snapshot from `internal/module`
 - validated generated text
 
 Outputs:
 
+- typed `Daily` generated text
 - typed `Today` generated text
 - typed `Tomorrow` generated text
 - typed `Hourly` generated text
@@ -33,6 +34,20 @@ Outputs:
 - generated-text catalog handlers for report definitions that use
   `generated_text_template`
 
+The Daily generated text JSON accepts the same public fields and validation
+rules as Tomorrow. Its catalog entry is selected through schema ID `daily` and
+template ID `daily`; render-context construction is not implemented until the
+Daily report context exists.
+
+```json
+{
+  "summary": "string",
+  "forecast_discussion": ["string"],
+  "precipitation_timing": "string",
+  "confidence": "string"
+}
+```
+
 The hourly generated text JSON accepts:
 
 ```json
@@ -96,8 +111,8 @@ JSON when blank.
 - Malformed generated-text JSON fails with decode context.
 - Unknown generated-text JSON fields fail during decoding.
 - Empty required fields fail after trimming whitespace.
-- Today and Tomorrow forecast discussion fails when no nonblank paragraphs
-  remain.
+- Daily, Today, and Tomorrow forecast discussion fails when no nonblank
+  paragraphs remain.
 - Missing optional render-context stanzas become nil module pointers.
 - Invalid render metadata, including missing timezone, missing generated time,
   or invalid valid period, fails before template rendering.
@@ -109,6 +124,7 @@ JSON when blank.
 Inspect:
 
 - `internal/generatedtext/hourly_test.go`
+- `internal/generatedtext/daily_test.go`
 - `internal/generatedtext/today_test.go`
 - `internal/generatedtext/tomorrow_test.go`
 - `internal/generatedtext/catalog_test.go`

docs/internal/reporttemplate.md

@@ -6,8 +6,8 @@ in `internal/reporttemplate`.
 ## Purpose
 
 `internal/reporttemplate` owns repository-native report templates and companion
-GeneratedText JSON schemas. The implemented template contracts are Today
-Report, Tomorrow Report, and Hourly Report.
+GeneratedText JSON schemas. The implemented template assets are Daily, Today,
+Tomorrow, and Hourly.
 
 The package embeds assets from:
 
@@ -31,13 +31,13 @@ Outputs:
 - GeneratedText schema bytes for prompt/schema configuration
 - rendered Markdown bytes for app orchestration to persist
 
-The implemented template IDs are `today`, `tomorrow`, and `hourly`. The
-implemented schema IDs are also `today`, `tomorrow`, and `hourly`, backed by
-matching `*.generated_text.schema.json` files.
+The implemented template IDs are `daily`, `today`, `tomorrow`, and `hourly`.
+The implemented schema IDs are also `daily`, `today`, `tomorrow`, and
+`hourly`, backed by matching `*.generated_text.schema.json` files.
 
-The Today generated-text prompt source is
-`internal/reporttemplate/prompts/today.generated_text.md`, selected by prompt
-ID `weather.today_generated_text`.
+Generated-text prompt sources are maintained under
+`internal/reporttemplate/prompts/`, including Daily's
+`daily.generated_text.md` source for prompt ID `weather.daily_generated_text`.
 
 ## Boundaries
 
@@ -67,6 +67,10 @@ forecast rows, daily/daypart summaries, planning facts, and a multi-paragraph
 forecast discussion generated-text slot. The ordered daypart slice is built in
 Go so templates do not range over maps.
 
+The Daily template asset uses the same Markdown structure and field surface as
+Tomorrow's template. Its typed render context in `internal/generatedtext` is
+not implemented yet.
+
 Templates use `text/template` with `missingkey=error`, so missing context fields
 fail rendering instead of producing incomplete Markdown.
 
@@ -78,10 +82,11 @@ to write for each generated-text prompt. Hourly requires:
 - `summary`
 - `forecast_discussion`
 
-Today and Tomorrow require `summary` and a nonempty `forecast_discussion`
-array. All generated-text schemas allow optional `precipitation_timing` and
-`confidence`, and reject additional properties. Weather truth remains in module
-outputs; GeneratedText is limited to prose slots consumed by the template.
+Daily, Today, and Tomorrow require `summary` and a nonempty
+`forecast_discussion` array. All generated-text schemas allow optional
+`precipitation_timing` and `confidence`, and reject additional properties.
+Weather truth remains in module outputs; GeneratedText is limited to prose
+slots consumed by the template.
 
 ## Failure Behavior
 

internal/generatedtext/catalog.go

@@ -12,10 +12,12 @@ import (
 
 const (
 	schemaIDHourly   = "hourly"
+	schemaIDDaily    = "daily"
 	schemaIDToday    = "today"
 	schemaIDTomorrow = "tomorrow"
 
 	templateIDHourly   = "hourly"
+	templateIDDaily    = "daily"
 	templateIDToday    = "today"
 	templateIDTomorrow = "tomorrow"
 )
@@ -46,6 +48,11 @@ var catalog = []catalogEntry{
 		validate:             validateHourly,
 		renderContextBuilder: buildHourlyContext,
 	},
+	{
+		schemaID:   schemaIDDaily,
+		templateID: templateIDDaily,
+		validate:   validateDaily,
+	},
 	{
 		schemaID:             schemaIDToday,
 		templateID:           templateIDToday,
@@ -142,6 +149,10 @@ func validateHourly(data []byte) (any, []byte, error) {
 	return ValidateHourly(data)
 }
 
+func validateDaily(data []byte) (any, []byte, error) {
+	return ValidateDaily(data)
+}
+
 func validateToday(data []byte) (any, []byte, error) {
 	return ValidateToday(data)
 }

internal/generatedtext/catalog_test.go

@@ -119,6 +119,32 @@ func TestCatalogLookupSupportsTodayDefinition(t *testing.T) {
 	}
 }
 
+func TestCatalogLookupSupportsDailyDefinitionAssets(t *testing.T) {
+	definition := report.Definition{
+		ID:                    report.ID("daily"),
+		GenerationMode:        report.GenerationModeGeneratedTextTemplate,
+		GeneratedTextSchemaID: "daily",
+		TemplateID:            "daily",
+	}
+	handler, err := LookupDefinition(definition)
+	if err != nil {
+		t.Fatalf("LookupDefinition(daily) error = %v", err)
+	}
+	if handler.SchemaID() != "daily" || handler.TemplateID() != "daily" {
+		t.Fatalf("handler IDs = %q/%q, want daily/daily", handler.SchemaID(), handler.TemplateID())
+	}
+	if schema, err := handler.Schema(); err != nil {
+		t.Fatalf("Schema() error = %v", err)
+	} else if len(schema) == 0 {
+		t.Fatal("Schema() returned empty asset")
+	}
+	if template, err := handler.Template(); err != nil {
+		t.Fatalf("Template() error = %v", err)
+	} else if !strings.Contains(template, "# {{ .Report.Title }}") {
+		t.Fatalf("Template() = %q, want Daily template source", template)
+	}
+}
+
 func TestCatalogValidationDispatchSupportsKnownSchemas(t *testing.T) {
 	hourlyHandler, err := LookupDefinition(report.DefaultRegistry().MustLookup(report.Hourly))
 	if err != nil {
@@ -178,6 +204,29 @@ func TestCatalogValidationDispatchSupportsKnownSchemas(t *testing.T) {
 	if !strings.Contains(string(normalized), `"forecast_discussion":["A front will keep rain chances elevated."]`) {
 		t.Fatalf("today normalized text = %s, want trimmed discussion paragraph", normalized)
 	}
+
+	dailyHandler, err := LookupDefinition(report.Definition{
+		ID:                    report.ID("daily"),
+		GenerationMode:        report.GenerationModeGeneratedTextTemplate,
+		GeneratedTextSchemaID: "daily",
+		TemplateID:            "daily",
+	})
+	if err != nil {
+		t.Fatalf("LookupDefinition(daily) error = %v", err)
+	}
+	daily, normalized, err := dailyHandler.Validate([]byte(`{
+		"summary": " Showers are possible during the selected day. ",
+		"forecast_discussion": [" A front will keep rain chances in the forecast. ", ""]
+	}`))
+	if err != nil {
+		t.Fatalf("Validate(daily) error = %v", err)
+	}
+	if _, ok := daily.(Daily); !ok {
+		t.Fatalf("daily generated text type = %T, want generatedtext.Daily", daily)
+	}
+	if !strings.Contains(string(normalized), `"forecast_discussion":["A front will keep rain chances in the forecast."]`) {
+		t.Fatalf("daily normalized text = %s, want trimmed discussion paragraph", normalized)
+	}
 }
 
 func TestCatalogBuildRenderContextRejectsMismatchedGeneratedText(t *testing.T) {
@@ -231,3 +280,25 @@ func TestCatalogBuildRenderContextRejectsMismatchedGeneratedText(t *testing.T) {
 		t.Fatalf("BuildRenderContext(today) error = %v, want today generated text requirement", err)
 	}
 }
+
+func TestCatalogBuildRenderContextRejectsDailyUntilContextExists(t *testing.T) {
+	handler, err := LookupDefinition(report.Definition{
+		ID:                    report.ID("daily"),
+		GenerationMode:        report.GenerationModeGeneratedTextTemplate,
+		GeneratedTextSchemaID: "daily",
+		TemplateID:            "daily",
+	})
+	if err != nil {
+		t.Fatalf("LookupDefinition(daily) error = %v", err)
+	}
+	_, err = handler.BuildRenderContext(testTomorrowMetadata(), testTomorrowSnapshot(t), testCollected(), testTomorrowDerived(), Daily{
+		Summary:            "Showers are possible during the selected day.",
+		ForecastDiscussion: []string{"A front will keep rain chances in the forecast."},
+	})
+	if err == nil {
+		t.Fatal("BuildRenderContext(daily) error = nil, want missing builder")
+	}
+	if !strings.Contains(err.Error(), `render-context builder is not registered for template "daily"`) {
+		t.Fatalf("BuildRenderContext(daily) error = %v, want missing daily builder", err)
+	}
+}

internal/generatedtext/daily.go

@@ -0,0 +1,37 @@
+package generatedtext
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Daily struct {
+	Summary             string   `json:"summary"`
+	ForecastDiscussion  []string `json:"forecast_discussion"`
+	PrecipitationTiming string   `json:"precipitation_timing,omitempty"`
+	Confidence          string   `json:"confidence,omitempty"`
+}
+
+func ValidateDaily(data []byte) (Daily, []byte, error) {
+	value, err := decodeGeneratedText[Daily](data, "daily")
+	if err != nil {
+		return Daily{}, nil, err
+	}
+
+	value.Summary = strings.TrimSpace(value.Summary)
+	value.PrecipitationTiming = strings.TrimSpace(value.PrecipitationTiming)
+	value.Confidence = strings.TrimSpace(value.Confidence)
+	value.ForecastDiscussion = trimNonEmpty(value.ForecastDiscussion)
+	if value.Summary == "" {
+		return Daily{}, nil, fmt.Errorf("daily generated text summary is required")
+	}
+	if len(value.ForecastDiscussion) == 0 {
+		return Daily{}, nil, fmt.Errorf("daily generated text forecast discussion is required")
+	}
+
+	normalized, err := normalizeGeneratedText(value, "daily")
+	if err != nil {
+		return Daily{}, nil, err
+	}
+	return value, normalized, nil
+}

internal/generatedtext/daily_test.go

@@ -0,0 +1,111 @@
+package generatedtext
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestValidateDailyNormalizesJSON(t *testing.T) {
+	value, normalized, err := ValidateDaily([]byte(`{
+		"summary": " Showers are possible during the selected day. ",
+		"forecast_discussion": [
+			"  A front will keep rain chances in the forecast. ",
+			"",
+			"  Temperatures stay seasonable by afternoon. "
+		],
+		"precipitation_timing": " Rain is most likely during the afternoon. ",
+		"confidence": " Medium "
+	}`))
+	if err != nil {
+		t.Fatalf("ValidateDaily() error = %v", err)
+	}
+	if value.Summary != "Showers are possible during the selected day." {
+		t.Fatalf("Summary = %q, want trimmed summary", value.Summary)
+	}
+	if strings.Join(value.ForecastDiscussion, "|") != "A front will keep rain chances in the forecast.|Temperatures stay seasonable by afternoon." {
+		t.Fatalf("ForecastDiscussion = %#v, want trimmed non-empty paragraphs", value.ForecastDiscussion)
+	}
+	if value.PrecipitationTiming != "Rain is most likely during the afternoon." {
+		t.Fatalf("PrecipitationTiming = %q, want trimmed precipitation timing", value.PrecipitationTiming)
+	}
+	want := `{"summary":"Showers are possible during the selected day.","forecast_discussion":["A front will keep rain chances in the forecast.","Temperatures stay seasonable by afternoon."],"precipitation_timing":"Rain is most likely during the afternoon.","confidence":"Medium"}`
+	if string(normalized) != want {
+		t.Fatalf("normalized = %s, want %s", normalized, want)
+	}
+}
+
+func TestValidateDailyOmitsEmptyOptionalFields(t *testing.T) {
+	_, normalized, err := ValidateDaily([]byte(`{
+		"summary": "Showers are possible during the selected day.",
+		"forecast_discussion": ["A front will keep rain chances in the forecast."],
+		"precipitation_timing": "   ",
+		"confidence": "   "
+	}`))
+	if err != nil {
+		t.Fatalf("ValidateDaily() error = %v", err)
+	}
+	want := `{"summary":"Showers are possible during the selected day.","forecast_discussion":["A front will keep rain chances in the forecast."]}`
+	if string(normalized) != want {
+		t.Fatalf("normalized = %s, want %s", normalized, want)
+	}
+}
+
+func TestValidateDailyRejectsInvalidInput(t *testing.T) {
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{
+			name: "malformed",
+			in:   `{`,
+			want: "decode daily generated text",
+		},
+		{
+			name: "unknown field",
+			in:   `{"summary":"Showers are possible during the selected day.","forecast_discussion":["A front will keep rain chances in the forecast."],"extra":"value"}`,
+			want: `unknown field "extra"`,
+		},
+		{
+			name: "missing summary",
+			in:   `{"forecast_discussion":["A front will keep rain chances in the forecast."]}`,
+			want: "summary is required",
+		},
+		{
+			name: "blank summary",
+			in:   `{"summary":"  ","forecast_discussion":["A front will keep rain chances in the forecast."]}`,
+			want: "summary is required",
+		},
+		{
+			name: "missing forecast discussion",
+			in:   `{"summary":"Showers are possible during the selected day."}`,
+			want: "forecast discussion is required",
+		},
+		{
+			name: "blank forecast discussion",
+			in:   `{"summary":"Showers are possible during the selected day.","forecast_discussion":["  ",""]}`,
+			want: "forecast discussion is required",
+		},
+		{
+			name: "forecast discussion wrong type",
+			in:   `{"summary":"Showers are possible during the selected day.","forecast_discussion":"A front will keep rain chances in the forecast."}`,
+			want: "cannot unmarshal string",
+		},
+		{
+			name: "multiple values",
+			in:   `{"summary":"Showers are possible during the selected day.","forecast_discussion":["A front will keep rain chances in the forecast."]} {}`,
+			want: "multiple JSON values",
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			_, _, err := ValidateDaily([]byte(test.in))
+			if err == nil {
+				t.Fatal("ValidateDaily() error = nil, want error")
+			}
+			if !strings.Contains(err.Error(), test.want) {
+				t.Fatalf("ValidateDaily() error = %v, want %q", err, test.want)
+			}
+		})
+	}
+}

internal/reporttemplate/prompts/daily.generated_text.md

@@ -0,0 +1,38 @@
+TASK: You are writing structured prose slots for a dated daily weather report.
+
+The calling application will render the final Markdown report. Your job is not to write the full report. Return only a JSON object matching the configured schema.
+
+Use only the supplied `data_package`. Do not invent weather details, times, hazards, probabilities, or impacts that are not supported by the data.
+
+The report focuses on the selected local civil day in `report.valid_period` for the configured location.
+
+Return these fields:
+
+- `summary`: required. 1-2 sentences summarizing the main weather story for the selected day.
+- `forecast_discussion`: required. 1 or more short paragraphs explaining the setup, timing, trend, or uncertainty most relevant to the selected day.
+- `precipitation_timing`: optional. Include only when the deterministic `precip_timing` module contains precipitation windows.
+- `confidence`: optional. Include only if uncertainty, timing spread, or conflicting signals materially affect how the reader should interpret the forecast.
+
+Return JSON only.
+
+# summary
+
+Lead with the most practical local outcome for the selected day. If an active warning is relevant during the report period, lead with the hazard.
+
+Mention the expected temperature character, precipitation risk, wind, visibility, heat, cold, or other hazards only when supported by the data package.
+
+# forecast_discussion
+
+Use deterministic module facts and narrative products to explain the most useful details for the selected day.
+
+Useful context may include:
+
+- timing of condition changes by daypart or hour
+- boundaries, forcing, moisture, instability, or storm mode when supported
+- active alerts or SPC outlooks that apply to the location
+- planning concerns surfaced by `daily_planning`
+- confidence or uncertainty
+
+# precipitation_timing
+
+Use 1-2 sentences to add practical precipitation context only when the data package contains deterministic precipitation windows. Include expected timing, type, intensity, duration, and uncertainty only when those details are supported.

internal/reporttemplate/reporttemplate.go

@@ -12,12 +12,14 @@ import (
 var assets embed.FS
 
 var templates = map[string]string{
+	"daily":    "templates/daily.md.tmpl",
 	"hourly":   "templates/hourly.md.tmpl",
 	"today":    "templates/today.md.tmpl",
 	"tomorrow": "templates/tomorrow.md.tmpl",
 }
 
 var schemas = map[string]string{
+	"daily":    "schemas/daily.generated_text.schema.json",
 	"hourly":   "schemas/hourly.generated_text.schema.json",
 	"today":    "schemas/today.generated_text.schema.json",
 	"tomorrow": "schemas/tomorrow.generated_text.schema.json",

internal/reporttemplate/reporttemplate_test.go

@@ -2,6 +2,7 @@ package reporttemplate
 
 import (
 	"encoding/json"
+	"os"
 	"strings"
 	"testing"
 )
@@ -30,6 +31,18 @@ func TestTomorrowTemplateLookup(t *testing.T) {
 	}
 }
 
+func TestDailyTemplateLookup(t *testing.T) {
+	source, err := Template("daily")
+	if err != nil {
+		t.Fatalf("Template() error = %v", err)
+	}
+	for _, want := range []string{"# {{ .Report.Title }}", "**Forecast date:**", "## Daypart Forecast", "## Precipitation Timing", "## Forecast Discussion"} {
+		if !strings.Contains(source, want) {
+			t.Fatalf("template missing %q:\n%s", want, source)
+		}
+	}
+}
+
 func TestTodayTemplateLookup(t *testing.T) {
 	source, err := Template("today")
 	if err != nil {
@@ -84,6 +97,37 @@ func TestTomorrowSchemaLookup(t *testing.T) {
 	}
 }
 
+func TestDailySchemaLookup(t *testing.T) {
+	data, err := Schema("daily")
+	if err != nil {
+		t.Fatalf("Schema() error = %v", err)
+	}
+	schema := assertSchema(t, data, "summary,forecast_discussion")
+	property, ok := schema.Properties["forecast_discussion"].(map[string]any)
+	if !ok {
+		t.Fatal("schema property forecast_discussion missing or invalid")
+	}
+	if property["type"] != "array" {
+		t.Fatalf("forecast_discussion type = %v, want array", property["type"])
+	}
+	if property["minItems"] != float64(1) {
+		t.Fatalf("forecast_discussion minItems = %v, want 1", property["minItems"])
+	}
+	items, ok := property["items"].(map[string]any)
+	if !ok || items["type"] != "string" {
+		t.Fatalf("forecast_discussion items = %#v, want string items", property["items"])
+	}
+	for _, field := range []string{"summary", "precipitation_timing", "confidence"} {
+		property, ok := schema.Properties[field].(map[string]any)
+		if !ok {
+			t.Fatalf("schema property %q missing or invalid", field)
+		}
+		if property["type"] != "string" {
+			t.Fatalf("schema property %q type = %v, want string", field, property["type"])
+		}
+	}
+}
+
 func TestTodaySchemaLookup(t *testing.T) {
 	data, err := Schema("today")
 	if err != nil {
@@ -351,6 +395,85 @@ func TestRenderTomorrow(t *testing.T) {
 	})
 }
 
+func TestRenderDaily(t *testing.T) {
+	rendered, err := Render("daily", testDailyRenderContext{
+		Report: testDailyReportContext{
+			Title:             "Monday's Weather",
+			ForecastDateLabel: "Monday, June 15, 2026",
+			GeneratedAtLabel:  "Sunday, June 14, 2026 at 9:14 AM",
+		},
+		GeneratedText: testDailyGeneratedText{
+			Summary: "The selected day starts dry before showers return later in the day.",
+			ForecastDiscussion: []string{
+				"Clouds increase after sunrise.",
+				"Rain chances peak during the afternoon.",
+			},
+			PrecipitationTiming: "A few showers may linger into early evening.",
+		},
+		Modules: testDailyModules{
+			Dayparts: []testDailyDaypart{
+				{
+					Key: "morning",
+					Summary: testDaypartSummary{
+						DisplayName:              "Morning",
+						TemperatureTrend:         "rising",
+						TemperatureStartPhraseF:  "upper 50s",
+						TemperatureEndPhraseF:    "upper 60s",
+						DominantConditionDisplay: "Sunny",
+						DominantConditionLower:   "sunny",
+					},
+				},
+				{
+					Key: "afternoon",
+					Summary: testDaypartSummary{
+						DisplayName:              "Afternoon",
+						TemperatureTrend:         "steady",
+						TemperatureSteadyPhraseF: "upper 70s",
+						DominantConditionDisplay: "Showers",
+						DominantConditionLower:   "showers",
+						MaxPopPercent:            intPtr(70),
+						MaxPopTimeLabel:          "3:00 PM",
+						MentionPrecipitation:     true,
+					},
+				},
+			},
+			PrecipTiming: &testPrecipTiming{
+				PrecipitationWindows: []testPrecipWindow{
+					{PeriodBeginsHourLabel: "3:00 PM", PeriodEndsHourLabel: "6:00 PM", MaxPopPercent: intPtr(70), MaxPopHourLabel: "3:00 PM"},
+				},
+			},
+		},
+	})
+	if err != nil {
+		t.Fatalf("Render() error = %v", err)
+	}
+	text := string(rendered)
+	for _, want := range []string{
+		"# Monday's Weather",
+		"**Forecast date:** Monday, June 15, 2026",
+		"**Updated:** Sunday, June 14, 2026 at 9:14 AM",
+		"The selected day starts dry before showers return later in the day.",
+		"- **Morning:** Sunny, with temperatures rising from the upper 50s to the upper 60s.",
+		"- **Afternoon:** Showers, with temperatures in the upper 70s. Chance of precipitation is 70%.",
+		"- **3:00 PM** to **6:00 PM**: Precipitation is expected during this period. The peak precipitation chance is 70% at 3:00 PM.",
+		"A few showers may linger into early evening.",
+		"Clouds increase after sunrise.",
+		"Rain chances peak during the afternoon.",
+	} {
+		if !strings.Contains(text, want) {
+			t.Fatalf("rendered template missing %q:\n%s", want, text)
+		}
+	}
+	assertOrderedText(t, text, []string{
+		"# Monday's Weather",
+		"## Daypart Forecast",
+		"- **Morning:**",
+		"- **Afternoon:**",
+		"## Precipitation Timing",
+		"## Forecast Discussion",
+	})
+}
+
 func TestRenderToday(t *testing.T) {
 	rendered, err := Render("today", testTodayRenderContext{
 		Report: testTodayReportContext{
@@ -532,17 +655,29 @@ func TestRenderHourlyOmitsConditionalSectionsForClearWeather(t *testing.T) {
 }
 
 func TestUnknownAssetsReturnActionableErrors(t *testing.T) {
-	if _, err := Template("daily"); err == nil || !strings.Contains(err.Error(), `unknown report template "daily"`) {
+	if _, err := Template("missing"); err == nil || !strings.Contains(err.Error(), `unknown report template "missing"`) {
 		t.Fatalf("Template() error = %v, want unknown template", err)
 	}
-	if _, err := Schema("daily"); err == nil || !strings.Contains(err.Error(), `unknown generated text schema "daily"`) {
+	if _, err := Schema("missing"); err == nil || !strings.Contains(err.Error(), `unknown generated text schema "missing"`) {
 		t.Fatalf("Schema() error = %v, want unknown schema", err)
 	}
-	if _, err := Render("daily", testRenderContext{}); err == nil || !strings.Contains(err.Error(), `unknown report template "daily"`) {
+	if _, err := Render("missing", testRenderContext{}); err == nil || !strings.Contains(err.Error(), `unknown report template "missing"`) {
 		t.Fatalf("Render() error = %v, want unknown template", err)
 	}
 }
 
+func TestDailyPromptAssetExists(t *testing.T) {
+	data, err := os.ReadFile("prompts/daily.generated_text.md")
+	if err != nil {
+		t.Fatalf("read Daily prompt asset: %v", err)
+	}
+	for _, want := range []string{"TASK:", "`summary`", "`forecast_discussion`", "`daily_planning`"} {
+		if !strings.Contains(string(data), want) {
+			t.Fatalf("Daily prompt asset missing %q:\n%s", want, string(data))
+		}
+	}
+}
+
 func TestRenderFailsForMissingContextFields(t *testing.T) {
 	_, err := Render("hourly", map[string]any{"Report": map[string]any{"Title": "Hourly Report"}})
 	if err == nil {
@@ -571,6 +706,12 @@ type testTodayRenderContext struct {
 	Modules       testTodayModules
 }
 
+type testDailyRenderContext struct {
+	Report        testDailyReportContext
+	GeneratedText testDailyGeneratedText
+	Modules       testDailyModules
+}
+
 type testReportContext struct {
 	Title            string
 	LocationName     string
@@ -597,6 +738,12 @@ type testTodayReportContext struct {
 	GeneratedAtLabel  string
 }
 
+type testDailyReportContext struct {
+	Title             string
+	ForecastDateLabel string
+	GeneratedAtLabel  string
+}
+
 type testTomorrowGeneratedText struct {
 	Summary             string
 	ForecastDiscussion  []string
@@ -604,6 +751,13 @@ type testTomorrowGeneratedText struct {
 	Confidence          string
 }
 
+type testDailyGeneratedText struct {
+	Summary             string
+	ForecastDiscussion  []string
+	PrecipitationTiming string
+	Confidence          string
+}
+
 type testModules struct {
 	CurrentConditions       *testCurrentConditions
 	HourlyForecast          *testHourlyForecast
@@ -627,6 +781,11 @@ type testTodayModules struct {
 	TodayPlanning     *testTodayPlanning
 }
 
+type testDailyModules struct {
+	Dayparts     []testDailyDaypart
+	PrecipTiming *testPrecipTiming
+}
+
 type testTodayPlanning struct {
 	MorningReadiness             []string
 	CommuteSchoolWorkdayConcerns []string
@@ -639,6 +798,11 @@ type testTomorrowDaypart struct {
 	Summary testDaypartSummary
 }
 
+type testDailyDaypart struct {
+	Key     string
+	Summary testDaypartSummary
+}
+
 type testDaypartSummary struct {
 	DisplayName              string
 	TempRangeF               string

internal/reporttemplate/schemas/daily.generated_text.schema.json

@@ -0,0 +1,29 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "weatherreporter.daily.generated_text.schema.json",
+  "title": "Daily GeneratedText",
+  "type": "object",
+  "additionalProperties": false,
+  "required": [
+    "summary",
+    "forecast_discussion"
+  ],
+  "properties": {
+    "summary": {
+      "type": "string"
+    },
+    "forecast_discussion": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      },
+      "minItems": 1
+    },
+    "precipitation_timing": {
+      "type": "string"
+    },
+    "confidence": {
+      "type": "string"
+    }
+  }
+}

internal/reporttemplate/templates/daily.md.tmpl

@@ -0,0 +1,24 @@
+# {{ .Report.Title }}
+
+**Forecast date:** {{ .Report.ForecastDateLabel }}
+**Updated:** {{ .Report.GeneratedAtLabel }}
+
+{{ .GeneratedText.Summary }}
+
+## Daypart Forecast
+{{ with .Modules.Dayparts }}{{ range . }}{{ $daypart := . }}- **{{ if .Summary.DisplayName }}{{ .Summary.DisplayName }}{{ else }}{{ .Key }}{{ end }}:** {{ with .Summary.DominantConditionDisplay }}{{ . }}{{ else }}{{ with .Summary.DominantCondition }}{{ . }}{{ else }}Forecast details are limited{{ end }}{{ end }}{{ if eq .Summary.TemperatureTrend "rising" }}{{ with .Summary.TemperatureStartPhraseF }}, with temperatures rising from the {{ . }}{{ with $daypart.Summary.TemperatureEndPhraseF }} to the {{ . }}{{ end }}{{ end }}{{ else if eq .Summary.TemperatureTrend "falling" }}{{ with .Summary.TemperatureStartPhraseF }}, with temperatures falling from the {{ . }}{{ with $daypart.Summary.TemperatureEndPhraseF }} to the {{ . }}{{ end }}{{ end }}{{ else if eq .Summary.TemperatureTrend "peaking" }}{{ with .Summary.TemperaturePeakPhraseF }}, with temperatures peaking in the {{ . }}{{ end }}{{ else }}{{ with .Summary.TemperatureSteadyPhraseF }}, with temperatures in the {{ . }}{{ else }}{{ with .Summary.TemperaturePhraseF }}, with temperatures in the {{ . }}{{ end }}{{ end }}{{ end }}.{{ if .Summary.MentionPrecipitation }}{{ with .Summary.MaxPopPercent }} Chance of precipitation is {{ . }}%.{{ end }}{{ end }}
+{{ end }}{{ else }}- No daypart forecast details are available.
+{{ end }}
+
+{{ with .Modules.PrecipTiming }}{{ with .PrecipitationWindows }}
+## Precipitation Timing
+{{ range . }}{{ $window := . }}
+- **{{ if .PeriodBeginsHourLabel }}{{ .PeriodBeginsHourLabel }}{{ else }}{{ .PeriodBegins }}{{ end }}**{{ with .PeriodEndsHourLabel }} to **{{ . }}**{{ else }}{{ with .PeriodEnds }} to **{{ . }}**{{ end }}{{ end }}: Precipitation is expected during this period.{{ with .MaxPopPercent }} The peak precipitation chance is {{ . }}%{{ with $window.MaxPopHourLabel }} at {{ . }}{{ else }}{{ with $window.MaxPopTime }} at {{ . }}{{ end }}{{ end }}.{{ end }}
+{{ end }}{{ with $.GeneratedText.PrecipitationTiming }}
+{{ . }}
+{{ end }}
+{{ end }}{{ end }}
+## Forecast Discussion
+{{ range .GeneratedText.ForecastDiscussion }}
+{{ . }}
+{{ end }}