Run tasks on Codex beside Claude; drop turn caps and mid-turn snapshots

internal/store/store.go

@@ -286,6 +286,9 @@ UPDATE tasks SET color = (SELECT count(*) FROM tasks AS earlier WHERE earlier.ro
 UPDATE tasks SET color = (
 	SELECT count(*) FROM tasks AS earlier WHERE earlier.status = 'active' AND earlier.rowid < tasks.rowid
 ) % 11 WHERE status = 'active';
+`}, {"drop-turn-queue", `
+UPDATE agent_sessions SET state = 'idle' WHERE state = 'queued';
+DROP TABLE turn_queue;
 `}}
 
 const (
@@ -1017,6 +1020,29 @@ func (s *Store) transitionSession(ctx context.Context, id string, from *api.Agen
 	})
 }
 
+func (s *Store) SessionStarted(ctx context.Context, sessionID string) (bool, error) {
+	started := false
+	err := s.db.QueryRowContext(ctx, `SELECT EXISTS (SELECT 1 FROM events WHERE agent_session_id = ? AND kind = 'user.message')`, sessionID).Scan(&started)
+	return started, err
+}
+
+func (s *Store) SetVendorSessionID(ctx context.Context, id, vendorSessionID string) error {
+	return s.write(ctx, func(tx *sql.Tx, emit emitFunc) error {
+		res, err := tx.ExecContext(ctx, `UPDATE agent_sessions SET vendor_session_id = ? WHERE id = ?`, vendorSessionID, id)
+		if err != nil {
+			return err
+		}
+		n, err := res.RowsAffected()
+		if err != nil {
+			return err
+		}
+		if n == 0 {
+			return ErrNotFound
+		}
+		return nil
+	})
+}
+
 func (s *Store) SetSessionModel(ctx context.Context, id, model, actor string) error {
 	return s.write(ctx, func(tx *sql.Tx, emit emitFunc) error {
 		taskID := ""