fix

pkg/agent/system_summary_fallback_test.go

@@ -0,0 +1,22 @@
+package agent
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestBuildSystemTaskSummaryFallbackUsesPolicyPrefixes(t *testing.T) {
+	policy := defaultSystemSummaryPolicy()
+	policy.marker = "## Runtime Summary"
+	policy.completedPrefix = "- Done:"
+	policy.changesPrefix = "- Delta:"
+	policy.outcomePrefix = "- Result:"
+
+	out := buildSystemTaskSummaryFallback("task", "updated README.md\nbuild passed", policy)
+	if !strings.HasPrefix(out, "## Runtime Summary") {
+		t.Fatalf("expected custom marker, got: %s", out)
+	}
+	if !strings.Contains(out, "- Done:") || !strings.Contains(out, "- Delta:") || !strings.Contains(out, "- Result:") {
+		t.Fatalf("expected custom prefixes, got: %s", out)
+	}
+}