2 files changed, 26 insertions, 1 deletions
diff --git a/internal/executor/preamble.go b/internal/executor/preamble.go
index bc5c32c..5e57852 100644
--- a/internal/executor/preamble.go
+++ b/internal/executor/preamble.go
@@ -56,7 +56,6 @@ and the outcome. Write it to the path in $CLAUDOMATOR_SUMMARY_FILE:
 This summary is displayed in the task UI so the user knows what happened.
 
 ---
-
 `
 
 func withPlanningPreamble(instructions string) string {
diff --git a/internal/executor/preamble_test.go b/internal/executor/preamble_test.go
new file mode 100644
index 0000000..448ad3a
--- /dev/null
+++ b/internal/executor/preamble_test.go
@@ -0,0 +1,26 @@
+package executor
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestPlanningPreamble_ContainsFinalSummarySection(t *testing.T) {
+	if !strings.Contains(planningPreamble, "## Final Summary (mandatory)") {
+		t.Error("planningPreamble missing '## Final Summary (mandatory)' heading")
+	}
+}
+
+func TestPlanningPreamble_SummaryRequiresMarkdownHeader(t *testing.T) {
+	if !strings.Contains(planningPreamble, `Start it with "## Summary"`) {
+		t.Error("planningPreamble does not instruct agent to start summary with '## Summary'")
+	}
+}
+
+func TestPlanningPreamble_SummaryDescribesRequiredContent(t *testing.T) {
+	for _, phrase := range []string{"What was accomplished", "Key decisions made", "Any issues or follow-ups"} {
+		if !strings.Contains(planningPreamble, phrase) {
+			t.Errorf("planningPreamble missing required summary content description: %q", phrase)
+		}
+	}
+}