atdd

name	atdd
scope	partial
description	[UDS] Guide through Acceptance Test-Driven Development workflow
allowed-tools	Read, Write, Grep, Glob
argument-hint	[feature or spec | 功能或規格]
status	reference

ATDD Assistant | ATDD 助手

⚠️ Status: Reference（參考用，非可執行流程） — 5 階段 ATDD 生命週期協調（WORKSHOP→DISTILLATION→DEVELOPMENT→DEMO→DONE、INVEST 驗證、AC→Gherkin 轉換、RED/GREEN 執行、PO sign-off gates）已於 2026-04-28 移至 adoption layer（XSPEC-095）。此處保留 INVEST 準則、ATDD 循環圖、Gherkin AC 格式、Three Amigos 結構供參考。 Lifecycle orchestration has moved to the adoption layer (XSPEC-095); this document is reference-only. For enforced execution, use your adoption layer's toolchain.

Guide through the Acceptance Test-Driven Development (ATDD) workflow for defining and validating user stories.

引導驗收測試驅動開發（ATDD）流程，用於定義和驗證使用者故事。

ATDD Cycle | ATDD 循環

WORKSHOP ──► DISTILLATION ──► DEVELOPMENT ──► DEMO ──► DONE
    ^                              │              │
    └──────────────────────────────┴──────────────┘
                  (Refinement needed)

Workflow | 工作流程

📖 以下為流程的參考結構，非可執行步驟；自動化／強制執行請用 adoption layer 工具鏈（XSPEC-095）。 The steps below are a reference structure, not an executable workflow.

1. WORKSHOP - Define AC | 定義驗收條件

PO presents user story, team asks clarifying questions, define acceptance criteria together.

2. DISTILLATION - Convert to Tests | 轉換為測試

Convert AC to executable test format, remove ambiguity, get PO sign-off.

3. DEVELOPMENT - Implement | 實作

Run acceptance tests (should fail initially), use BDD/TDD for implementation, iterate until all pass.

4. DEMO - Present | 向利害關係人展示

Show passing acceptance tests, demonstrate working functionality, get formal acceptance.

5. DONE - Complete | 完成

PO accepted, code merged, story closed.

INVEST Criteria | INVEST 準則

Criterion	Description	說明
Independent	Can be developed separately	可獨立開發
Negotiable	Details can be discussed	可協商細節
Valuable	Delivers business value	提供商業價值
Estimable	Can estimate effort	可估算工作量
Small	Fits in one sprint	一個 Sprint 可完成
Testable	Has clear acceptance criteria	有明確驗收條件

User Story Format | 使用者故事格式

As a [role],
I want [feature],
So that [benefit].

### Acceptance Criteria
- Given [context], when [action], then [result]

Usage | 使用方式

/atdd                              - Start interactive ATDD session | 啟動互動式 ATDD 會話
/atdd "user can reset password"    - ATDD for specific feature | 針對特定功能
/atdd US-123                       - ATDD for existing user story | 處理現有使用者故事

Next Steps Guidance | 下一步引導

After /atdd completes, the AI assistant should suggest:

驗收測試已定義。建議下一步 / Acceptance tests defined. Suggested next steps:

• 執行 /sdd 建立規格文件 ⭐ Recommended / 推薦 — Create a specification document
• 執行 /bdd 將 AC 轉為 Gherkin 場景 — Convert AC to Gherkin scenarios
• 執行 /tdd 直接實作驗收測試 — Implement acceptance tests directly

Reference | 參考

• Detailed guide: guide.md
• Core standard: acceptance-test-driven-development.md

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：/atdd

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