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matterloop-observability

MatterLoop 的事件是业务事实,不是日志字符串。matterloop-observability 把 Core LoopEvent 接到日志、指标和 Trace,同时把日志后端与 OpenTelemetry 的进程级配置留给宿主应用。

pip install matterloop-observability
# 需要 OpenTelemetry 时
pip install "matterloop-observability[otel]"

一次合理的装配

import logging

from matterloop_observability import (
    CompositeEventPublisher,
    HandlerEventPublisher,
    MetricsHandler,
    PublisherFailureMode,
    Redactor,
    StructuredLoggingHandler,
)

redactor = Redactor(extra_fields=("tenant_secret", "session_credential"))
metrics = MetricsHandler()

events = CompositeEventPublisher(
    publishers=(
        HandlerEventPublisher(
            StructuredLoggingHandler(
                logger=logging.getLogger("app.matterloop.audit"),
                redactor=redactor,
            )
        ),
        HandlerEventPublisher(metrics),
    ),
    failure_mode=PublisherFailureMode.RAISE,
)

将 events 注入 AgentLoop(events=...)。处理器按顺序执行;本包不创建后台队列,也不接管 Logger、 Exporter、Provider 或它们的关闭流程。

失败策略要显式选择

CompositeEventPublisher(publishers, failure_mode) 支持两种策略:

  • LOG_AND_CONTINUE 是默认值,适合可丢失的遥测。单个发布器失败会记录异常,并继续发布后续事件。
  • RAISE 在第一个失败处停止,适合审计不可缺失的场景。代价是可观测性故障可能中断业务闭环。

如果要求“状态提交与审计记录同时成功”,顺序调用几个 Publisher 并不能提供事务保证。应使用 Outbox、持久化事件表或消息系统完成原子交接。

日志里有什么

StructuredLoggingHandler(logger, redactor) 输出单行 JSON,包含事件类型、run_id、Loop 状态、 发生时间、事件说明和请求 metadata。默认 Logger 名称是 matterloop.events;日志格式、轮转、 保留期和访问控制仍由应用配置。

Redactor(extra_fields) 会递归检查映射键,默认识别 token、authorization、cookie、 api_key、password 和 secret,也能命中 access_token 之类的前后缀名称。它不会扫描自由文本: 提示词、模型输出、URL 查询参数和异常堆栈里的秘密仍可能泄漏。不要把凭据放进 goal、detail 或任意字符串 metadata。

指标与 Trace

  • MetricsHandler 保存当前进程内的事件计数,适合测试和轻量诊断。
  • OpenTelemetryMetricsHandler 写入 matterloop.loop.events,只附带事件类型和 Loop 状态。
  • TracingHandler 为每个事件创建短 Span,不会自动构造覆盖整个 Loop 的父 Span。

OpenTelemetry 组件只使用 API。宿主必须先配置 SDK、Exporter、采样和资源属性;安装 extra 不等于 数据会被导出。构造时缺少 OpenTelemetry 依赖会立即抛出 RuntimeError。

扩展方式

同步或异步 callable 可用 HandlerEventPublisher(handler) 接入。需要批量、重试或背压时,直接实现 Core EventPublisher.publish(event),在实现内部管理有界队列和关闭流程。

本包当前面向 Core LoopEvent。TeamLoop 事件的数据结构不同,需要单独适配,不能把团队事件发布器 直接塞给这些处理器。生产拓扑和关闭顺序见企业集成指南。

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