How do I install the Bdd skill?

Run npx skillmds@latest add asiaostrich/bdd in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Which AI agents work with Bdd?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

AsiaOstrich (@asiaostrich) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Bdd by asiaostrich — Agent Skill

Name: Bdd
Rating: 4.2 (5 reviews)
Author: AsiaOstrich

Bdd

[UDS] Reference for Behavior-Driven Development: Gherkin Given-When-Then format and Three Amigos structure. Use when: writing or reviewing .feature scenarios, choosing ubiquitous language, running a discovery conversation about behaviour. Not for: executing the BDD lifecycle or RED/GREEN automation — that moved to the adoption layer (XSPEC-095); turning .feature files into E2E skeletons — use /e2e. Keywords: BDD, Gherkin, Given When Then, feature file, scenario, Three Amigos, 行為驅動開發, 場景, 特性檔.

AsiaOstrich f6726d1 4 files · 35.4 KB Updated Sep 10, 2026

File contents

BDD Assistant | BDD 助手

⚠️ Status: Reference（參考用，非可執行流程） — BDD 生命週期協調（4 階段循環、Gherkin scaffolding、RED/GREEN 執行）已於 2026-04-28 移至 adoption layer（XSPEC-095）。此處保留 Gherkin 格式定義、Three Amigos 結構、BDD 循環圖供參考。 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 Behavior-Driven Development (BDD) workflow using Given-When-Then format.

引導行為驅動開發（BDD）流程，使用 Given-When-Then 格式。

BDD Cycle | BDD 循環

DISCOVERY ──► FORMULATION ──► AUTOMATION ──► LIVING DOCS
    ^                                            │
    └────────────────────────────────────────────┘

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. DISCOVERY - Explore Behavior | 探索行為

Discuss with stakeholders, identify examples and edge cases, understand the "why".

2. FORMULATION - Write Scenarios | 制定場景

Write Gherkin scenarios using ubiquitous language, make them concrete and specific.

3. AUTOMATION - Implement Tests | 自動化測試

Implement step definitions, write minimal code to pass, follow TDD within automation.

4. LIVING DOCUMENTATION - Maintain | 活文件維護

Keep scenarios current, use as shared documentation, review with stakeholders.

Gherkin Format | Gherkin 格式

Feature: User Login
  As a registered user
  I want to log in to my account
  So that I can access my dashboard

  Scenario: Successful login
    Given I am on the login page
    When I enter valid credentials
    Then I should see my dashboard

Three Amigos | 三劍客會議

Role	Focus	角色	關注點
Business	What & Why	業務	什麼和為什麼
Development	How	開發	如何實現
Testing	What if	測試	假設情況

Usage | 使用方式

/bdd                              - Start interactive BDD session | 啟動互動式 BDD 會話
/bdd "user can reset password"    - BDD for specific feature | 針對特定功能
/bdd login-feature.feature        - Work with existing feature file | 處理現有功能檔案

Next Steps Guidance | 下一步引導

After /bdd completes, the AI assistant should suggest:

BDD 場景已定義。建議下一步 / BDD scenarios defined. Suggested next steps:

執行 /tdd 實作步驟定義 ⭐ Recommended / 推薦 — Implement step definitions

執行 /checkin 品質關卡（若功能完成）— Quality gates (if feature complete)

與利害關係人審查場景確保業務正確性 — Review scenarios with stakeholders

Reference | 參考

BDD Workflow Guide — Read it when running discovery, formulation and automation as a cycle.
Gherkin Quick Reference Guide — Read it when writing Given/When/Then and you need the exact syntax.
Detailed guide: guide.md
Core standard: behavior-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：/bdd

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

---name: bdddescription: [UDS] Reference for Behavior-Driven Development: Gherkin Given-When-Then format and Three Amigos structure. Use when: writing or reviewing .feature scenarios, choosing ubiquitous language, running a discovery conversation about behaviour. Not for: executing the BDD lifecycle or RED/GREEN automation — that moved to the adoption layer (XSPEC-095); turning .feature files into E2E skeletons — use /e2e. Keywords: BDD, Gherkin, Given When Then, feature file, scenario, Three Amigos, 行為驅動開發, 場景, 特性檔.---# BDD Assistant | BDD 助手> ⚠️ **Status: Reference（參考用，非可執行流程）** — BDD 生命週期協調（4 階段循環、Gherkin scaffolding、RED/GREEN 執行）已於 2026-04-28 移至 **adoption layer（XSPEC-095）**。此處保留 Gherkin 格式定義、Three Amigos 結構、BDD 循環圖供參考。> 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 Behavior-Driven Development (BDD) workflow using Given-When-Then format.引導行為驅動開發（BDD）流程，使用 Given-When-Then 格式。## BDD Cycle | BDD 循環```DISCOVERY ──► FORMULATION ──► AUTOMATION ──► LIVING DOCS ^ │ └────────────────────────────────────────────┘```## 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. DISCOVERY - Explore Behavior | 探索行為Discuss with stakeholders, identify examples and edge cases, understand the "why".### 2. FORMULATION - Write Scenarios | 制定場景Write Gherkin scenarios using ubiquitous language, make them concrete and specific.### 3. AUTOMATION - Implement Tests | 自動化測試Implement step definitions, write minimal code to pass, follow TDD within automation.### 4. LIVING DOCUMENTATION - Maintain | 活文件維護Keep scenarios current, use as shared documentation, review with stakeholders.## Gherkin Format | Gherkin 格式```gherkinFeature: User Login As a registered user I want to log in to my account So that I can access my dashboard Scenario: Successful login Given I am on the login page When I enter valid credentials Then I should see my dashboard```## Three Amigos | 三劍客會議| Role | Focus | 角色 | 關注點 ||------|-------|------|--------|| **Business** | What & Why | 業務 | 什麼和為什麼 || **Development** | How | 開發 | 如何實現 || **Testing** | What if | 測試 | 假設情況 |## Usage | 使用方式```/bdd - Start interactive BDD session | 啟動互動式 BDD 會話/bdd "user can reset password" - BDD for specific feature | 針對特定功能/bdd login-feature.feature - Work with existing feature file | 處理現有功能檔案```## Next Steps Guidance | 下一步引導After `/bdd` completes, the AI assistant should suggest:> **BDD 場景已定義。建議下一步 / BDD scenarios defined. Suggested next steps:**> - 執行 `/tdd` 實作步驟定義 ⭐ **Recommended / 推薦** — Implement step definitions> - 執行 `/checkin` 品質關卡（若功能完成）— Quality gates (if feature complete)> - 與利害關係人審查場景確保業務正確性 — Review scenarios with stakeholders## Reference | 參考- [BDD Workflow Guide](./bdd-workflow.md) — Read it when running discovery, formulation and automation as a cycle.- [Gherkin Quick Reference Guide](./gherkin-guide.md) — Read it when writing Given/When/Then and you need the exact syntax.- Detailed guide: [guide.md](./guide.md)- Core standard: [behavior-driven-development.md](../../core/behavior-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：[`/bdd`](../commands/bdd.md#ai-agent-behavior--ai-代理行為)>> For complete AI agent behavior definition, see the corresponding command file: [`/bdd`](../commands/bdd.md#ai-agent-behavior--ai-代理行為)

Frequently asked questions

Bdd