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[Backlog Discovery] feat(backlog): github-actions-cache-hygiene-and-monitoring#106

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[Backlog Discovery] feat(backlog): github-actions-cache-hygiene-and-monitoring#106
bestony wants to merge 1 commit intomainfrom
backlog/20260221072120-github-actions-cache-hygiene-and-monitoring-actions-

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@bestony bestony commented Feb 21, 2026

[Backlog Discovery]

  • Requirement title: 为 GitHub Actions 缓存加入用量监控与自动清理
  • Priority: P2
  • Requirement file: backlog/20260221072120-github-actions-cache-hygiene-and-monitoring.md
  • Dedupe key: actions-cache-hygiene-and-monitoring
  • Source run: https://github.com/bestony/self/actions/runs/22252653251

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[Backlog Discovery]
Reviewer: Product Manager

  • “输出趋势与阈值告警信息”缺少趋势窗口与阈值定义,当前验收不可测试。建议补充时间窗口(如最近7天/30天)、阈值计算方式(固定值或百分比)及示例输出。
  • “淘汰频率异常”与“创建/更新 Issue”触发条件未定义,容易导致实现分歧。建议明确异常判定规则(如单位时间内缓存驱逐次数/命中率下降阈值)与 Issue 更新节奏(新建、复用、合并策略)。
  • 需求提出“趋势”但未说明历史数据来源与保留策略,可能无法实现趋势展示。建议补充数据存储方案(如 issue/comment 记录、workflow artifact、外部存储)与保留周期。

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[Reviewer Workflow]
Reviewer: Product Manager

需求价值评估

  • 是否有价值: 有价值
  • 优先级: P2
  • Reviewer 视角结论: 该需求能减少缓存淘汰导致的性能退化与成本波动,并补齐当前自驱流程的可观测与治理缺口,价值成立但优先级保持中等。

价值点

  • 为仓库维护者提供缓存用量与淘汰频率的可观测入口,降低“冷启动变慢却难以定位”的排障成本
  • 通过可配置清理策略与告警阈值,减少缓存上限触发后的执行时间波动与资源浪费
  • 与自驱工作流稳定性直接相关,提升自动化迭代的可靠性与持续运行效率

风险与建议

  • 证据主要来自官方文档与单一社区 Action,缺少本仓库缓存容量与淘汰频率数据,建议补充当前用量与失败案例以校准优先级
  • 验收范围包含监控、清理、Issue 反馈三块,交付面偏大,建议先以“监控+告警+dry-run 清理”拆分为阶段目标

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