Forward Derivation | 正向推演

Generate derived artifacts (BDD scenarios, TDD skeletons, ATDD tables) from approved SDD specifications.

從已批准的 SDD 規格生成衍生工件（BDD 場景、TDD 骨架、ATDD 表格）。

Subcommands | 子命令

Subcommand	Description	Output
`all`	Generate BDD + TDD (default)	`.feature` + `.test.*`
`bdd`	Generate BDD scenarios only	`.feature`
`tdd`	Generate TDD skeletons only	`.test.*`
`atdd`	Generate ATDD test tables	`.md` (Markdown tables)

Workflow | 工作流程

Read Spec - Analyze the input SPEC-XXX.md file | 分析規格檔案
Extract AC - Parse all Acceptance Criteria | 解析所有驗收條件
Generate Artifacts - Create BDD/TDD/ATDD outputs | 產生衍生工件
Verify - Ensure 1:1 mapping between AC and generated items | 驗證一對一對應

Anti-Hallucination Rules | 防幻覺規則

Rule	Description	說明
1:1 Mapping	Every AC has exactly one test/scenario	每個 AC 對應一個測試
Traceability	All artifacts reference Spec ID and AC ID	所有工件引用規格與 AC 編號
No Invention	Do not add scenarios not in the spec	不新增規格外的場景

Generated Artifact Tags | 產生工件標籤

Tag	Meaning	含義
`[Source]`	Direct content from spec	直接來自規格
`[Derived]`	Transformed from source	從來源轉換
`[Generated]`	AI-generated structure	AI 產生的結構
`[TODO]`	Requires human implementation	需人工實作

Usage | 使用方式

/derive all specs/SPEC-001.md           - Derive BDD + TDD | 推演 BDD + TDD
/derive bdd specs/SPEC-001.md           - Derive BDD scenarios only | 僅推演 BDD 場景
/derive tdd specs/SPEC-001.md           - Derive TDD skeletons only | 僅推演 TDD 骨架
/derive atdd specs/SPEC-001.md          - Derive ATDD tables | 推演 ATDD 表格

Next Steps Guidance | 下一步引導

After /derive completes, the AI assistant should suggest:

測試工件已產生。建議下一步 / Test artifacts generated. Suggested next steps:

執行 /tdd 開始紅綠重構循環 — Start Red-Green-Refactor cycle

執行 /bdd 細化 Gherkin 場景 — Refine Gherkin scenarios

檢查產生的 [TODO] 標記並補齊實作 — Review [TODO] markers and fill in implementations

Reference | 參考

Detailed guide: guide.md
Core standard: forward-derivation-standards.md