Terminalize handled invocation failures

internal/manifest/manifest.go

@@ -121,6 +121,15 @@ func (m *Manifest) MarkStageFailed(name string, at time.Time, message string) {
 	m.UpdatedAt = at
 }
 
+// RecordFailure records an invocation failure without changing session progress.
+func (m *Manifest) RecordFailure(at time.Time, message string) {
+	if m == nil {
+		return
+	}
+	m.LastError = &ErrorRecord{Message: strings.TrimSpace(message), At: timePtr(at)}
+	m.UpdatedAt = at
+}
+
 // MarkStageSkipped marks a stage as skipped and records the skip reason.
 func (m *Manifest) MarkStageSkipped(name string, at time.Time, reason string) {
 	s := m.ensureStage(name, at)

internal/manifest/store.go

@@ -21,6 +21,12 @@ type Store interface {
 	Save(ctx context.Context, path string, m *Manifest) error
 }
 
+// RunStore persists invocation-scoped run manifests.
+type RunStore interface {
+	CreateRun(ctx context.Context, sessionID, campaign, runID string, force bool, requestedStages []string) (*RunManifest, error)
+	SaveRun(ctx context.Context, path string, m *RunManifest) error
+}
+
 // LocalStore stores manifests as JSON on the local filesystem.
 type LocalStore struct{}