Expose run-wide reasoning effort controls

internal/core/debugbundle/bundle_test.go

@@ -2,6 +2,7 @@ package debugbundle
 
 import (
 	"bytes"
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
@@ -137,6 +138,47 @@ func TestSummaryWriterWritesEverySummaryArtifact(t *testing.T) {
 		}
 	}
 }
+
+func TestWriteInvocationPreservesReasoningEffortOverrideStates(t *testing.T) {
+	replacement := "focused"
+	cleared := ""
+	tests := []struct {
+		name      string
+		override  *string
+		wantValue string
+		wantSet   bool
+	}{
+		{name: "inherit"},
+		{name: "replace", override: &replacement, wantValue: "focused", wantSet: true},
+		{name: "clear", override: &cleared, wantSet: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			bundle, err := Allocate(t.TempDir(), testBundleRunID, time.Unix(0, 42))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := bundle.Summary().WriteInvocation(Invocation{
+				Operation:               "run",
+				ReasoningEffortOverride: tt.override,
+			}); err != nil {
+				t.Fatal(err)
+			}
+			data, err := os.ReadFile(filepath.Join(bundle.SummaryRoot(), ArtifactInvocationMetadata))
+			if err != nil {
+				t.Fatal(err)
+			}
+			var payload map[string]any
+			if err := json.Unmarshal(data, &payload); err != nil {
+				t.Fatal(err)
+			}
+			value, found := payload["reasoning_effort_override"]
+			if found != tt.wantSet || (found && value != tt.wantValue) {
+				t.Fatalf("reasoning override found=%t value=%#v, want found=%t value=%q; JSON=%s", found, value, tt.wantSet, tt.wantValue, data)
+			}
+		})
+	}
+}
 func TestSummaryWriterInternalWritesConfineArtifacts(t *testing.T) {
 	bundle, err := Allocate(t.TempDir(), testBundleRunID, time.Unix(0, 42))
 	if err != nil {