Harden lease lifecycle durability

internal/orchestrator/worktrees_test.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -73,7 +74,7 @@ func TestGitWorktreesCommitsTaskFile(t *testing.T) {
 	initRepo(t, repo)
 
 	w := orchestrator.GitWorktrees{Root: filepath.Join(base, "wt"), Repo: repo}
-	task := domain.Task{ID: "t1", Project: "p", Source: "jsonl", ExternalID: "1", Title: "do the thing"}
+	task := domain.Task{ID: "t1", Project: "p", Source: "jsonl", ExternalID: "1", Title: "do the thing", Acceptance: []string{"tests pass"}, QualityGate: "go test ./..."}
 
 	path, err := w.Create(context.Background(), task)
 	if err != nil {
@@ -88,6 +89,9 @@ func TestGitWorktreesCommitsTaskFile(t *testing.T) {
 	if string(got) != string(want) {
 		t.Fatalf("TASK.md content mismatch:\ngot:  %s\nwant: %s", got, want)
 	}
+	if !strings.Contains(string(got), "## Acceptance criteria") || !strings.Contains(string(got), ".orchestra/done") {
+		t.Fatalf("TASK.md is missing deterministic completion contract: %s", got)
+	}
 
 	status, err := exec.Command("git", "-C", path, "status", "--porcelain", "--", "TASK.md").Output()
 	if err != nil {