sync engine design Shipped

What this lens looks for

The worker evaluates sync engine architecture: layered design (app → orchestrator → handlers → transport → local DB), entity-agnostic Syncable interface, explicit sync cycle steps (collect → package → send → receive → apply → checkpoint), sync scheduling logic, snapshot rebuilding, and error handling with circuit breaker patterns.

What its verifier checks

• Sync layers defined and documented (application layer, sync orchestrator, entity handlers, transport, local DB)
• Syncable interface documented with required methods (getDirtyChanges, applyRemoteChanges, getCheckpoint, etc.)
• Sync cycle steps explicit and ordered: collect changes → package → send → receive → apply → checkpoint
• Sync scheduling strategy documented (interval, exponential backoff, on-demand, connectivity-triggered)
• Snapshot rebuilding mechanism specified for consistency verification
• Error classification documented (transient vs permanent) with handling strategy per type
• Circuit breaker thresholds defined (failure count, timeout duration, reset strategy)