Choose durable storage

Choose the collections backend through serve() or your super-line host. The harness stores structural state as typed rows; token deltas remain ephemeral.

• Use { type: 'memory' } for tests and disposable local runs.
• Use { type: 'sqlite', file: './harness.db' } for the standalone default.
• Use { type: 'pglite', pgUrl, electricUrl? } for multi-node deployments.

All modes preserve threads, nodes, tools, and membership rows. Clients rebuild the current tree from those rows after reconnecting.