Files
multica/server/internal/handler
LinYushen 0b1333fb00 feat(server): orphan-task recovery + auto-retry + manual rerun (MUL-1128) (#1476)
* feat(server): orphan-task recovery + auto-retry + manual rerun (MUL-1128)

When the daemon process crashed mid-task the issue was stuck at
in_progress for up to 2.5h: the in-flight task timeout was the only
mechanism that ever moved the row, and the runtime heartbeat sweeper
only fires after the runtime stays offline for 45s — a quick restart
beats both windows.

This change implements the A+B plan from the issue thread:

A. lifecycle hygiene
- migration 055 adds attempt / max_attempts / parent_task_id /
  failure_reason / last_heartbeat_at to agent_task_queue
- new daemon-auth endpoint POST /runtimes/{id}/recover-orphans:
  daemon calls it on every register so the server fails any
  dispatched/running tasks the previous process left behind
- new daemon-auth endpoint POST /tasks/{id}/session: persists the
  agent's session_id + work_dir mid-flight so a crash doesn't
  lose the resume pointer (claude+codex emit MessageStatus with
  SessionID; daemon forwards on the first one it sees)
- FailAgentTask / FailStaleTasks / FailTasksForOfflineRuntimes
  now set failure_reason ('agent_error' / 'timeout' /
  'runtime_offline')

B. auto-retry with resume context
- TaskService.MaybeRetryFailedTask spawns a fresh queued attempt
  carrying parent's session_id/work_dir when the failure reason
  is infrastructure-shaped (timeout, runtime_offline,
  runtime_recovery) and attempt < max_attempts; skips autopilot
- wired into the runtime sweeper paths and TaskService.FailTask
  so the user transparently sees a new in_progress run instead of
  a stuck row
- new user-auth POST /api/issues/{id}/rerun + multica issue rerun
  CLI for the manual escape hatch

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(server): address PR review for orphan-task recovery (MUL-1128)

Three review-must-fix items on top of the A+B implementation:

1. recover-orphans now funnels through TaskService.HandleFailedTasks,
   the same shared post-failure pipeline used by the runtime sweeper.
   This guarantees task:failed events are emitted, agent status is
   reconciled, and issues stuck in_progress with no remaining active
   task are reset to todo even when no auto-retry is created
   (max_attempts exhausted, autopilot, non-retryable reason).

2. RerunIssue now uses CancelAgentTasksByIssueAndAgent, scoped to the
   issue's current assignee. The previous implementation called
   CancelAgentTasksByIssue, which would collateral-cancel parallel
   @-mention agents on the same issue.

3. GetLastTaskSession now considers both completed and failed tasks
   (mirroring GetLastChatTaskSession), ordering by the most recent
   timestamp. With UpdateAgentTaskSession pinning session_id/work_dir
   mid-flight, an auto-retry or manual rerun of a daemon-crash failure
   now actually resumes the prior conversation context instead of
   starting fresh — matching the stated B-branch behaviour.

go build / go vet pass; the existing service and agent test suites pass.
runtime_sweeper / handler integration tests require a local DB with the
055 migration (and the pre-existing 050 first_executed_at column).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-04-22 13:08:37 +08:00
..