Durable Execution Assistant | 持久執行助手

Guide fault-tolerant workflow design with automatic recovery, checkpoints, and retry strategies.

引導容錯工作流程設計，包含自動恢復、檢查點與重試策略。

Usage | 使用方式

Command	Purpose	用途
/durable	Start interactive failure recovery guide	啟動互動式故障恢復引導
/durable --checkpoint	Design checkpoint strategy	設計檢查點策略
/durable --retry	Configure retry policies	配置重試策略
/durable --rollback	Plan rollback procedures	規劃回滾程序
/durable <workflow>	Analyze specific workflow for durability	分析特定工作流的持久性

Core Concepts | 核心概念

Concept	Definition	定義
Checkpoint	Save execution state at known-good points	在已知正確的位置儲存執行狀態
Retry	Automatically re-attempt failed operations	自動重新嘗試失敗的操作
Rollback	Revert to last known-good state on failure	失敗時回復到上一個已知正確狀態
Idempotency	Operations produce same result on re-execution	操作重新執行時產生相同結果
Circuit Breaker	Stop retries when failure rate exceeds threshold	失敗率超過閾值時停止重試

Failure Recovery Decision Tree | 故障恢復決策樹

Failure detected
├── Is it transient? (network, timeout)
│   ├── Yes → Retry with backoff
│   └── No → Is state corrupted?
│       ├── Yes → Rollback to checkpoint
│       └── No → Is it a logic error?
│           ├── Yes → Stop, report, fix code
│           └── No → Escalate with diagnostics

Retry Strategy Guide | 重試策略指南

Strategy	When to Use	Config	使用時機
Immediate	Rare glitches, fast ops	max 2 retries	罕見故障、快速操作
Exponential Backoff	Network/API calls	base 1s, max 30s	網路/API 呼叫
Circuit Breaker	Downstream service issues	threshold 50%, window 60s	下游服務問題
Dead Letter	Unrecoverable after retries	max 5 retries then queue	重試後仍不可恢復

Checkpoint Granularity | 檢查點粒度

Granularity	Use Case	使用場景
Per-step	Long pipelines (> 5 steps)	長管線（> 5 步驟）
Per-batch	Bulk data processing	批量資料處理
Per-phase	Multi-phase workflows	多階段工作流程
Start/End	Short, atomic operations	短暫的原子操作

Workflow | 工作流程

1. DETECT - Identify failure type and scope
2. DIAGNOSE - Determine root cause category
3. RECOVER - Apply appropriate recovery strategy
4. VERIFY - Confirm system state is consistent
5. RESUME - Continue from last checkpoint

---

1. 偵測 - 識別故障類型與範圍
2. 診斷 - 判定根本原因類別
3. 恢復 - 套用適當的恢復策略
4. 驗證 - 確認系統狀態一致
5. 繼續 - 從上一個檢查點繼續

Usage Examples | 使用範例

User: /durable deploy-pipeline
AI: Analyzing deploy-pipeline for durability...
    Steps: build → test → deploy → verify
    Risk: deploy step has no rollback strategy.
    Recommendation: Add checkpoint after test,
    configure rollback for deploy using blue-green strategy.

Next Steps Guidance | 下一步引導

After /durable completes, the AI assistant should suggest:

持久性分析完成。建議下一步 / Durability analysis complete. Suggested next steps:

• 執行 /methodology 選擇適合的開發方法論 ⭐ Recommended / 推薦 — Choose suitable methodology
• 執行 /commit 提交持久化設計變更 — Commit durability design changes

Version History | 版本歷史

Version	Date	Changes	變更
1.0.0	2026-03-24	Initial release	初始版本

AI Agent Behavior | AI 代理行為

完整的 AI 行為定義請參閱對應的命令文件：/durable

For complete AI agent behavior definition, see the corresponding command file: /durable

License | 授權

CC BY 4.0