The schedule_task MCP tool wrote routing fields (platform_id, channel_type,
thread_id) onto the outbound system message's row columns, but
handleSystemAction (src/delivery.ts) parses content JSON and forwards only
that to handlers. handleScheduleTask (src/modules/scheduling/actions.ts)
reads content.platformId/channelType/threadId — which the writer never
populated — so every kind='task' row landed in messages_in with all-null
routing.
When host-sweep wakes a scheduled task, dispatchResultText's fast path
requires routing on the message and bails when it's null, falling through
to the "Routing recovery" retry prompt. End-user delivery still works
because the agent can pick a destination from its destinations table on
retry — so the bug went undetected, silently costing one extra LLM turn
per scheduled-task wake. Sessions whose destinations table has no channel
row (e.g. agent-only destinations) fail outright with a recovery loop.
Fix: add the routing fields to the content JSON so the writer matches the
contract handleScheduleTask already expects. cancel/pause/resume/update_task
operate by id alone and don't need routing.