Skip agent-fired prompts so they don't count as bedtime violations

[ColinToft]

Summary

Without this, every wakeup-fired scheduled task or background-task notification that lands while the user is asleep counts as a violation the next morning, polluting the count and the escalation tone of the next day's reminders.

The hook now skips agent-fired prompts via five layered signals — any one is sufficient:

1. Prompt starts with <task-notification> (Monitor / agent completions).
2. Prompt starts with <bash-stderr> (background bash stderr).
3. Transcript has a matching user entry with isMeta=true (scheduled wakeups, /loop autonomous loops, local-command caveats). Race-y — the entry may not be committed to the transcript file at hook-fire time.
4. Most recent non-user entry is type=system, subtype=scheduled_task_fire. Helps when signal 3 loses to the transcript-write race.
5. Some prior assistant tool_use has an input.prompt matching the current prompt text (ScheduleWakeup, CronCreate, /loop, …). Race-free because the tool_use is committed when the assistant turn ends, long before the wakeup actually fires.

Why signal 5 matters

Real-world failure last night: a ScheduleWakeup queued at 19:24 fired ~2 hours later at 21:55, while I was asleep. The wakeup-fired prompt:

• Had isMeta=true set on its eventual transcript entry, but the entry hadn't been committed when the hook ran (signal 3 missed).
• The most recent non-user entry at hook-fire time was a stop_hook_summary, not scheduled_task_fire (signal 4 missed).

Signal 5 caught it cleanly by matching the prompt text against the ScheduleWakeup tool_use that had queued it hours earlier — that tool_use was reliably in the transcript by the time the wakeup fired.

Verified

• Existing signals 1-4 unchanged.
• Signal 5 verified against last night's actual transcript (the entry that had triggered a false-positive bedtime violation now correctly identifies as agent-fired).
• bash -n syntax check passes.
• No new external deps; all logic stays in the existing Python block.

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