Changelog: Durable Offline Chat Queue, Outbox Drain & Local Fallback Resolver (FEAT-20260831-17, TASK-20260924-04)

Timestamp: 2026-09-24 23:59:00 EDT
Host: rdmpw3265m (Intel Xeon W-3265M, macOS 26.7)
Agent: agy@rdmpw3265m/1b772f66-eb66-4280-b839-1638b7406470
Project: Tyrell (~/dev/apps/Tyrell)
Tickets: FEAT-20260831-17, TASK-20260924-04 (RESOLVED)

1. Summary of Changes

• Outbox Domain Models & Policies (OutboxModels.swift):
  • Implemented OutboxKind (chat, usage, manifest, agentEvent), OutboxEnvelope with idempotency keys, and OutboxStats.
  • Implemented OutboxPolicy with configurable queue capacity, backoff bounds, and kind-specific coalescing rules (telemetry .usage coalesces by key; .chat and .agentEvent never coalesce per DEC-20260831-10).
• Durable SQLite Storage (SQLiteStateStore+Outbox.swift):
  • Added outbox table schema and index on (destination, next_attempt_at).
  • Implemented synchronous local enqueueing, coalescing updates, capacity bounds enforcement, delivery acknowledgments, and attempt logging.
• Outbox Drain Actor (OutboxDrain.swift):
  • Implemented background drain engine with exponential backoff and full jitter (delay = random(0, min(cap, base * 2^attempts))).
  • Added fast-path reconnect via notifyNetworkAvailable() to trigger immediate drain on network reconnection.
  • Classified errors into permanent (HTTP 4xx except 408/429) vs transient, parking permanent failures in dead-letter state without infinite retries (satisfying DISCONNECTED-OPERATION.md §3.2 & V4).
• Offline Chat Queue Coordinator (OfflineChatQueue.swift):
  • Implemented local-first chat writes: messages synchronously commit to local SQLiteStateStore before enqueuing to the outbox, insulating users from network partitions.
• Chat Endpoint Fallback (ChatEndpointResolver.swift & SettingsView.swift):
  • Added .localDaemon case to ChatEndpointSource, localDaemonURL (http://127.0.0.1:43117), and resolve(hostName:configData:localDaemonAvailable:) overload.
  • Updated SettingsView relay label mapping for .localDaemon.

2. Verification Evidence

• Build: swift build rc=0, clean compilation across all targets.
• Tests:
  • OfflineChatQueueTests: 5/5 tests passed (100%), 0 failures.
  • ChatTransportTests: 12/12 tests passed (100%), 0 failures.
• Static Gate: scripts/verify_zero_fleet_identity.zsh exited 0 (0 violations).
• Git Lineage:
  • Feature branch agy/offline-chat-queue-FEAT-20260831-17 (commit 2172451).
  • Integration merge to canonical main (20696a0) with TYRELL_CANONICAL_INTEGRATION=1.
  • Synchronized across remotes: fleet (git.ecs0.net:git/apps/Tyrell.git) and backup (github.com/richhdoty/rdmsm4x-dev-apps-tyrell.git).
• Ticket Store & Wiki:
  • Marked RESOLVED in issueRoo; committed on rdmsm4x:~/dev/issues (ffaae3b).
  • Exported 1,229 ticket HTML pages; committed and pushed to dev.ecs0.net (336d26e).
  • Fleet announcement broadcast via agent_msg.zsh: 20260924-235947-E525DCA8.