Changed #

• Allow juice_storage 2.0.0 (Hive CE migration). Test now uses hive_ce. No API change.

Fixed #

• StorageSyncStore now opens its own Hive boxes (outbox + the private meta box) before first use. Previously the app was expected to pre-open them via StorageConfig.hiveBoxesToOpen, but it can't — the meta box name is internal — so loadAll failed with boxNotOpen at startup, putting SyncBloc into SyncStatus.error. Open is idempotent, so the store self-heals. Surfaced by the Glean dogfood.

Changed #

• StorageSyncError.toString() now includes its cause, so a wrapped storage failure is visible instead of opaque.

Added #

• Initial release.
• SyncBloc — an offline outbox / mutation queue: durably persist writes, then flush them to a backend when online.
• Durable persistence — SyncStore seam; StorageSyncStore (juice_storage- backed, FIFO via a persisted seq counter) + InMemorySyncStore (tests).
• MutationExecutor — injected transport seam. PermanentSyncError ⇒ dead-letter; any other throw ⇒ retryable.
• Partitioned FIFO ordering — mutations sharing an orderingKey are strict in-order; independent partitions proceed past a blocked one.
• Exponential-backoff retries with maxAttempts ⇒ dead-letter (a poison mutation can't wedge the queue).
• Crash-safe at-least-once — inFlight is persisted before send; a recovered inFlight is re-sent (relies on server idempotency on mutation.id).
• Auto-flush on a false→true edge of onlineSignal; optional periodicRetry.
• Fail-loud — enqueue throws if the write can't be persisted; loadAll failure ⇒ error status (never a silently-empty queue); non-JSON payloads rejected at enqueue.
• API — enqueue, flush, retryFailed, discard.
• Rebuild groups — sync:status, sync:queue, sync:failed, sync:mutation:<id>.

Not yet included #

• Backoff jitter, lean-state for very large queues, and offline-read pausing (juice_network_connectivity) — planned post-0.1.