feat: resume support, summary extraction, and task state improvements

- Extend Resume to CANCELLED, FAILED, and BUDGET_EXCEEDED tasks
- Add summary extraction from agent stdout stream-json output
- Fix storage: persist stdout/stderr/artifact_dir paths in UpdateExecution
- Clear question_json on ResetTaskForRetry
- Resume BLOCKED tasks in preserved sandbox so Claude finds its session
- Add planning preamble: CLAUDOMATOR_SUMMARY_FILE env var + summary step
- Update ADR-002 with new state transitions
- UI style improvements

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/internal/executor/summary_test.go b/internal/executor/summary_test.go
new file mode 100644
index 0000000..4a73711
--- /dev/null
+++ b/internal/executor/summary_test.go
@@ -0,0 +1,49 @@
+package executor
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestExtractSummary_WithSummarySection(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "stdout.log")
+	content := streamLine(`{"type":"assistant","message":{"content":[{"type":"text","text":"## Summary\nThe task was completed successfully."}]}}`)
+	if err := os.WriteFile(path, []byte(content), 0600); err != nil {
+		t.Fatal(err)
+	}
+	got := extractSummary(path)
+	want := "The task was completed successfully."
+	if got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}
+
+func TestExtractSummary_NoSummary(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "stdout.log")
+	content := streamLine(`{"type":"assistant","message":{"content":[{"type":"text","text":"All done, no summary heading."}]}}`)
+	if err := os.WriteFile(path, []byte(content), 0600); err != nil {
+		t.Fatal(err)
+	}
+	got := extractSummary(path)
+	if got != "" {
+		t.Errorf("expected empty string, got %q", got)
+	}
+}
+
+func TestExtractSummary_MultipleSections_PicksLast(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "stdout.log")
+	content := streamLine(`{"type":"assistant","message":{"content":[{"type":"text","text":"## Summary\nFirst summary."}]}}`) +
+		streamLine(`{"type":"assistant","message":{"content":[{"type":"text","text":"## Summary\nFinal summary."}]}}`)
+	if err := os.WriteFile(path, []byte(content), 0600); err != nil {
+		t.Fatal(err)
+	}
+	got := extractSummary(path)
+	want := "Final summary."
+	if got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}