Zero-Copy Change Data Capture (CDC)

The Polling Tax

Periodic database polling (SELECT ... WHERE updated_at > ...) burns CPU cycles and delays event processing. Modern agent loops and real-time security pipelines require instant reactive push notifications.

The UniDB CDC Engine

• Direct Ring Buffer Attachment: Subscribers attach directly to the shared-memory ring buffer, receiving state mutations in < 500 nanoseconds at > 3,000,000 events/sec.
• Domain Topic Subscriptions: Filter events by domain (DOMAIN_TASK for agent state, DOMAIN_AST for code changes, DOMAIN_TELEMETRY for system events).
• Slow Consumer Protection: Automatic lapped ring detection prevents data corruption and triggers a stateful snapshot reconciliation handshake when needed.

# Stream MCP agent task transitions in real time
unidb listen --domain task --follow --format json | jq '.payload'