feat(processors): streamline event debugging and run inspection

tests/unit_tests/agent/test_run_ledger_store.py

@@ -455,3 +455,20 @@ async def test_processor_instance_history_filters_count_and_pages(store):
     )
     assert (total, more) == (2, False)
     assert second[0]['run_id'] == 'run-0'
+
+
+@pytest.mark.asyncio
+async def test_run_lifecycle_retains_milliseconds(store, monkeypatch):
+    started = datetime.datetime(2026, 9, 8, 0, 0, 0, 123000, tzinfo=UTC)
+    monkeypatch.setattr('langbot.pkg.agent.runner.run_ledger_store._utc_now', lambda: started)
+    run = await store.create_run(
+        run_id='run-ms', event_id='evt-ms', binding_id='binding-ms', runner_id='runner-ms', status='running'
+    )
+    assert run['created_at_ms'] == round(started.timestamp() * 1000)
+    assert run['started_at_ms'] == run['created_at_ms']
+    assert run['finished_at_ms'] is None
+    finished = started + datetime.timedelta(milliseconds=275)
+    monkeypatch.setattr('langbot.pkg.agent.runner.run_ledger_store._utc_now', lambda: finished)
+    await store.finalize_run(run_id='run-ms', status='completed')
+    saved = await store.get_run('run-ms')
+    assert saved['finished_at_ms'] - saved['started_at_ms'] == 275

tests/unit_tests/api/service/test_agent_service.py

@@ -770,6 +770,20 @@ class TestAgentServiceCreateUpdateDelete:
         )
 
 
+async def test_event_processor_can_be_created_before_selecting_a_plugin():
+    app = _make_app()
+    service = AgentService(app)
+    result = await service.create_agent(
+        WORKSPACE_UUID,
+        {'kind': 'event_processor', 'name': 'Unconfigured', 'supported_event_patterns': ['*']},
+    )
+    values = _compiled_params(app.persistence_mgr.execute_async.call_args.args[0])
+    assert result['kind'] == 'event_processor'
+    assert values['component_ref'] is None
+    assert values['supported_event_patterns'] == []
+    assert values['config'] == {}
+
+
 async def test_event_processor_creation_uses_installed_component_scope():
     app = _make_app()
     ref = 'event_processor:test/welcome/default'
@@ -797,6 +811,34 @@ async def test_event_processor_creation_uses_installed_component_scope():
     assert values['config']['runner_config'][ref] == {'greeting': 'Hi'}
 
 
+async def test_unconfigured_event_processor_can_select_a_plugin_after_creation():
+    app = _make_app()
+    row = _agent_row(config={})
+    row.kind = 'event_processor'
+    row.component_ref = None
+    ref = 'event_processor:test/welcome/default'
+    app.agent_runner_registry = SimpleNamespace(
+        get=AsyncMock(
+            return_value=SimpleNamespace(
+                component_kind='EventProcessor',
+                supported_event_patterns=['group.member_joined'],
+                config_schema=[{'name': 'greeting', 'required': True}],
+            )
+        )
+    )
+    service = AgentService(app)
+    service._get_agent_row = AsyncMock(return_value=row)
+    await service.update_agent(
+        WORKSPACE_UUID,
+        row.uuid,
+        {'component_ref': ref, 'parameters': {'greeting': 'Hi'}, 'supported_event_patterns': ['*']},
+    )
+    values = _compiled_update_values(app.persistence_mgr.execute_async.call_args.args[0])
+    assert values['component_ref'] == ref
+    assert values['supported_event_patterns'] == ['group.member_joined']
+    assert values['config']['runner_config'][ref] == {'greeting': 'Hi'}
+
+
 async def test_event_processor_rejects_invalid_component_and_missing_parameters():
     app = _make_app()
     service = AgentService(app)