feat: dispatch due scheduled prompts

tests/test_sessions.py

@@ -1,5 +1,5 @@
 import pytest
-from datetime import datetime
+from datetime import datetime, timedelta
 from pathlib import Path
 from unittest.mock import AsyncMock, MagicMock, patch
 
@@ -188,6 +188,113 @@ async def test_list_sessions_includes_pending_scheduled_prompt(service, db, tmux
     assert result[0].scheduled_prompt.status == "pending"
 
 
+@pytest.mark.asyncio
+async def test_dispatch_due_prompt_alive_window_sends_and_marks_sent(service, db, tmux):
+    sess = _seed_session(db)
+    due = datetime.now() - timedelta(seconds=1)
+    scheduled = service.schedule_prompt(sess.id, "continue", due)
+    tmux.is_alive = AsyncMock(return_value=True)
+
+    results = await service.dispatch_due_prompts(now=datetime.now())
+
+    assert len(results) == 1
+    assert results[0].ok is True
+    assert results[0].session_id == sess.id
+    assert results[0].window_name == "hqt-rename"
+    tmux.send_text.assert_awaited_once_with("hqt-rename", "continue")
+    tmux.send_enter.assert_awaited_once_with("hqt-rename")
+    db.expire_all()
+    row = db.get(ScheduledPrompt, scheduled.id)
+    assert row.status == "sent"
+    assert row.sent_at is not None
+
+
+@pytest.mark.asyncio
+async def test_dispatch_due_prompt_dead_window_resumes_without_attach(
+    service, db, tmux, harnesses
+):
+    sess = _seed_session(db)
+    service.schedule_prompt(sess.id, "continue", datetime.now() - timedelta(seconds=1))
+    tmux.is_alive = AsyncMock(return_value=False)
+    tmux.respawn_verified = AsyncMock(
+        return_value=SpawnResult(ok=True, window_id=None, error="")
+    )
+    tmux.attach = AsyncMock(return_value=True)
+    harnesses["claude-code"].build_resume_config = MagicMock(
+        return_value=MagicMock(
+            command=["claude", "--resume"], env={}, cwd=Path("/tmp/myproj")
+        )
+    )
+
+    results = await service.dispatch_due_prompts(now=datetime.now())
+
+    assert len(results) == 1
+    assert results[0].ok is True
+    tmux.respawn_verified.assert_awaited()
+    tmux.attach.assert_not_called()
+    tmux.send_text.assert_awaited_once_with("hqt-rename", "continue")
+    tmux.send_enter.assert_awaited_once_with("hqt-rename")
+
+
+@pytest.mark.asyncio
+async def test_dispatch_due_prompt_resume_failure_marks_failed(
+    service, db, tmux, harnesses
+):
+    sess = _seed_session(db)
+    scheduled = service.schedule_prompt(
+        sess.id, "continue", datetime.now() - timedelta(seconds=1)
+    )
+    tmux.is_alive = AsyncMock(return_value=False)
+    tmux.respawn_verified = AsyncMock(
+        return_value=SpawnResult(ok=False, window_id=None, error="resume failed")
+    )
+    harnesses["claude-code"].build_resume_config = MagicMock(
+        return_value=MagicMock(
+            command=["claude", "--resume"], env={}, cwd=Path("/tmp/myproj")
+        )
+    )
+    harnesses["claude-code"].build_spawn_config = MagicMock(
+        return_value=MagicMock(command=["claude"], env={}, cwd=Path("/tmp/myproj"))
+    )
+
+    results = await service.dispatch_due_prompts(now=datetime.now())
+
+    assert len(results) == 1
+    assert results[0].ok is False
+    assert "resume failed" in results[0].error
+    tmux.send_text.assert_not_called()
+    tmux.send_enter.assert_not_called()
+    db.expire_all()
+    row = db.get(ScheduledPrompt, scheduled.id)
+    assert row.status == "failed"
+    assert "resume failed" in row.error
+
+
+@pytest.mark.asyncio
+async def test_dispatch_due_prompt_send_failure_does_not_retry_next_poll(
+    service, db, tmux
+):
+    sess = _seed_session(db)
+    scheduled = service.schedule_prompt(
+        sess.id, "continue", datetime.now() - timedelta(seconds=1)
+    )
+    tmux.is_alive = AsyncMock(return_value=True)
+    tmux.send_text = AsyncMock(return_value=False)
+
+    first = await service.dispatch_due_prompts(now=datetime.now())
+    second = await service.dispatch_due_prompts(now=datetime.now())
+
+    assert len(first) == 1
+    assert first[0].ok is False
+    assert second == []
+    assert tmux.send_text.await_count == 1
+    tmux.send_enter.assert_not_called()
+    db.expire_all()
+    row = db.get(ScheduledPrompt, scheduled.id)
+    assert row.status == "failed"
+    assert "send text failed" in row.error
+
+
 @pytest.mark.asyncio
 async def test_stop_session(service, tmux):
     await service.create_session(project_id=1, harness_name="claude-code")