Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/ValorVie/custom-skillsnpx agentmods add skills/valorvie/custom-skills/atdd-assistantWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/valorvie/custom-skills/atdd-assistant)<a href="https://agentmods.dev/skills/valorvie/custom-skills/atdd-assistant"><img src="https://agentmods.dev/badge/skills/valorvie/custom-skills/atdd-assistant/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/valorvie/custom-skills/atdd-assistant"><img src="https://agentmods.dev/badge/skills/valorvie/custom-skills/atdd-assistant.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00068 | $0.02624 |
| Opus 5 | $0.00034 | $0.01312 |
| Sonnet 5 | $0.00014 | $0.00525 |
| Haiku 4.5 | $0.00007 | $0.00262 |
Grade A, and why
atdd-assistant scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 380 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ATDD Assistant
Language: English | 繁體中文
Version: 1.0.0 Last Updated: 2026-01-19 Applicability: Claude Code Skills
Purpose
This skill guides teams through the Acceptance Test-Driven Development workflow, helping them:
- Conduct effective Specification Workshops
- Write testable acceptance criteria in Given-When-Then format
- Convert criteria to executable acceptance tests
- Ensure proper collaboration between PO, Dev, and QA
- Integrate ATDD with BDD and TDD for complete workflow
Quick Reference
ATDD Workflow Checklist
┌─────────────────────────────────────────────────────────────────┐
│ 🤝 SPECIFICATION WORKSHOP Phase │
│ □ Product Owner presents user story │
│ □ Team asks clarifying questions │
│ □ Acceptance criteria defined together │
│ □ Concrete examples written for each AC │
│ □ Edge cases and error scenarios discussed │
│ □ Out of scope explicitly documented │
├─────────────────────────────────────────────────────────────────┤
│ 🧪 DISTILLATION Phase │
│ □ Examples converted to executable tests │
│ □ Ambiguity removed from tests │
│ □ Tests in executable format (Gherkin, FitNesse, etc.) │
│ □ Product Owner signs off on tests │
├─────────────────────────────────────────────────────────────────┤
│ 💻 DEVELOPMENT Phase │
│ □ Acceptance tests initially fail (RED) │
│ □ BDD used for feature tests, TDD for unit tests │
│ □ Incremental progress toward passing ATs │
│ □ All acceptance tests pass (GREEN) │
│ □ Code refactored and clean │
├─────────────────────────────────────────────────────────────────┤
│ 🎬 DEMO Phase │
│ □ All acceptance tests passing │
│ □ Demo environment prepared │
│ □ Key stakeholders present │
│ □ Product Owner validates functionality │
│ □ Story accepted or criteria refined │
└─────────────────────────────────────────────────────────────────┘
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 380 lines · 68 tokens per session scan A e0b15689b2d2
atdd-assistant is a skill published in the GitHub repository ValorVie/custom-skills (5 stars, last pushed 2d ago), licensed MIT. It adds 68 tokens to every session and 2,624 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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