cord: Skill for Claude Code

.agent/skills/bmad-testarch-atdd/SKILL.md

bmad-testarch-atdd is a skill for Claude Code, Codex from flanliulf/cord. It costs 40 tokens per session (827 once invoked), scanned A, a copy of bmad-testarch-atdd, MIT.

A skill for creating acceptance-test scaffolds before implementation using ATDD, or Acceptance Test-Driven Development, with the TDD red-green-refactor cycle.

In plain words
What is it for?
It is for starting acceptance tests when defining a feature or following an ATDD workflow.
Why use it?
It gives the team tests that describe the expected behavior before production code is written.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

This is flanliulf/cord's own configuration. It tells Claude Code and Codex how to work on cord itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cord configures →

Reuse

Borrowing it

Nothing to install: this file belongs to flanliulf/cord. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/flanliulf/cord/main/.agent/skills/bmad-testarch-atdd/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/flanliulf/cord

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for bmad-testarch-atdd

README.md
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Your own site
<a href="https://agentmods.dev/skills/flanliulf/cord/bmad-testarch-atdd"><img src="https://agentmods.dev/badge/skills/flanliulf/cord/bmad-testarch-atdd/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.

agentmods 80×15 button for bmad-testarch-atdd

Your own site · 80×15
<a href="https://agentmods.dev/skills/flanliulf/cord/bmad-testarch-atdd"><img src="https://agentmods.dev/badge/skills/flanliulf/cord/bmad-testarch-atdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 827 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.00827
Opus 5 $0.00020 $0.00413
Sonnet 5 $0.00008 $0.00165
Haiku 4.5 $0.00004 $0.00083

Measured 10d ago against content hash fc37ffeab69c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

bmad-testarch-atdd 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 10d 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.

Origin

This is a copy

100% identical to bmad-testarch-atdd — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agent/skills/bmad-testarch-atdd/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Acceptance Test-Driven Development (ATDD)

Goal: Generate red-phase acceptance test scaffolds before implementation using TDD red-green-refactor cycle.

Role: You are the Master Test Architect.

You will continue to operate with your given name, identity, and communication_style, merged with the details of this role description.

Conventions

  • Bare paths (e.g. instructions.md) resolve from the skill root.
  • {skill-root} resolves to this skill's installed directory (where customize.toml lives).
  • {project-root}-prefixed paths resolve from the project working directory.
  • {skill-name} resolves to the skill directory's basename.
  • Resolve sibling workflow files such as instructions.md, checklist.md, steps-c/..., steps-e/..., steps-v/..., and templates from {skill-root}.

On Activation

Step 1: Resolve the Workflow Block

Run: python3 {project-root}/_bmad/scripts/resolve_customization.py --skill {skill-root} --key workflow

If the script fails, resolve the workflow block yourself by reading these three files in base → team → user order and applying the same structural merge rules as the resolver:

  1. {skill-root}/customize.toml — defaults
  2. {project-root}/_bmad/custom/{skill-name}.toml — team overrides
  3. {project-root}/_bmad/custom/{skill-name}.user.toml — personal overrides

Any missing file is skipped. Scalars override, tables deep-merge, arrays of tables keyed by code or id replace matching entries and append new entries, and all other arrays append.

Step 2: Execute Prepend Steps

Execute each entry in {workflow.activation_steps_prepend} in order before proceeding.

Step 3: Load Persistent Facts

Treat every entry in {workflow.persistent_facts} as foundational context you carry for the rest of the workflow run. Entries prefixed file: are paths or globs resolved from {project-root} — expand them and load every matching file in lexical path order as facts. All other entries are facts verbatim.

Read the full file on GitHub · 86 lines

Files

What ships with it

60 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.

Changes

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.

  1. 10d ago First seen · 86 lines · 40 tokens per session scan A fc37ffeab69c

Subscribe to this mod's changes

bmad-testarch-atdd is a skill published in the GitHub repository flanliulf/cord (6 stars, last pushed 3mo ago), licensed MIT. It adds 40 tokens to every session and 827 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to bmad-testarch-atdd, differing in 0 lines, and is treated as a copy.

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