Bound generated text content and diagnostics

internal/adapters/promptkit/adapter.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	promptkit "gitea.maximumdirect.net/eric/promptkit"
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/generatedtext"
 	"gitea.maximumdirect.net/eric/weatherreporter/internal/promptassets"
 	"gitea.maximumdirect.net/eric/weatherreporter/internal/promptexec"
 )
@@ -193,6 +194,17 @@ func executionValue(value *promptkit.RunResult, captureDebug bool) *promptexec.E
 		value.Validation.SchemaPath,
 		value.Validation.Errors,
 	)
+	rawOutput := []byte(nil)
+	if len(value.RawOutput) <= generatedtext.MaxGeneratedTextBytes {
+		rawOutput = []byte(value.RawOutput)
+	} else {
+		validation = promptexec.NewValidation(
+			promptexec.ValidationFailed,
+			string(value.Validation.Mode),
+			value.Validation.SchemaPath,
+			[]string{"generated output exceeds the configured size limit"},
+		)
+	}
 	execution := &promptexec.Execution{
 		RunID:              value.RunID,
 		PromptID:           value.PromptID,
@@ -215,11 +227,11 @@ func executionValue(value *promptkit.RunResult, captureDebug bool) *promptexec.E
 		EndedAt:    value.EndTime,
 		Duration:   value.Duration,
 		Validation: validation,
-		RawOutput:  []byte(value.RawOutput),
+		RawOutput:  rawOutput,
 	}
 	if captureDebug {
 		execution.Debug = &promptexec.ExecutionDebug{
-			RawOutput:             append([]byte(nil), value.RawOutput...),
+			RawOutput:             append([]byte(nil), rawOutput...),
 			ValidationDiagnostics: append([]string(nil), validation.Diagnostics...),
 		}
 	}

internal/adapters/promptkit/adapter_test.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	promptkit "gitea.maximumdirect.net/eric/promptkit"
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/generatedtext"
 	"gitea.maximumdirect.net/eric/weatherreporter/internal/promptexec"
 )
 
@@ -364,6 +365,23 @@ func TestExecuteReturnsCompletedValidationRejection(t *testing.T) {
 	}
 }
 
+func TestExecuteDropsOversizedGeneratedOutput(t *testing.T) {
+	client := &fakeClient{response: &promptkit.GenerateResponse{Content: strings.Repeat("x", generatedtext.MaxGeneratedTextBytes+1)}}
+	adapter := newTestAdapter(t, client)
+	request := testExecuteRequest()
+	request.CaptureDebug = true
+	result, err := adapter.Execute(context.Background(), request, nil)
+	if err != nil {
+		t.Fatalf("Execute() error = %v", err)
+	}
+	if result == nil || result.Validation.Status != promptexec.ValidationFailed || len(result.RawOutput) != 0 || result.Debug == nil || len(result.Debug.RawOutput) != 0 {
+		t.Fatalf("execution = %#v", result)
+	}
+	if len(result.Validation.Diagnostics) != 1 || result.Validation.Diagnostics[0] != "generated output exceeds the configured size limit" {
+		t.Fatalf("diagnostics = %#v", result.Validation.Diagnostics)
+	}
+}
+
 func TestExecuteClassifiesOperationalFailures(t *testing.T) {
 	tests := []struct {
 		name     string