tdd

tdd is a command for coding agents from Claude-Code-Community-Ireland/claude-code-resources. It costs 17 tokens per session (310 once invoked), scanned A, original, MIT.

A command for test-driven development, or TDD: writing a failing test, adding the smallest code that passes it, and then improving the code.

In plain words
What is it for?
It helps detect the project's test framework, split a feature into testable pieces, write tests first, implement them, refactor, and run the full test suite.
Why use it?
It makes the requested behavior explicit in tests and checks each small change as it is built.

Command

Part of the vibeworks-library plugin — 1 skill, 21 commands, 34 agents, 3 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/claude-code-community-ireland/claude-code-resources/tdd
Clone the repo
git clone --depth 1 https://github.com/Claude-Code-Community-Ireland/claude-code-resources

Or install vibeworks-library, the plugin that ships this one along with the rest of its 1 skill, 21 commands, 34 agents, 3 hooks.

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 tdd

README.md
[![agentmods](https://agentmods.dev/badge/commands/claude-code-community-ireland/claude-code-resources/tdd.svg)](https://agentmods.dev/commands/claude-code-community-ireland/claude-code-resources/tdd)
Your own site
<a href="https://agentmods.dev/commands/claude-code-community-ireland/claude-code-resources/tdd"><img src="https://agentmods.dev/badge/commands/claude-code-community-ireland/claude-code-resources/tdd.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00017 $0.00310
Opus 5 $0.00009 $0.00155
Sonnet 5 $0.00003 $0.00062
Haiku 4.5 $0.00002 $0.00031

Measured 4d ago against content hash 94fa804d7750, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tdd 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 4d 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.

plugins/vibeworks-library/commands/tdd.md · 29 lines

What it actually says

TDD Workflow

You are starting a test-driven development session.

Steps

  1. Detect the test framework: Search for test configuration files (jest.config, vitest.config, pytest.ini, Cargo.toml [dev-dependencies], etc.) and existing test files to understand the project's testing setup.

  2. Understand the request: Read the user's feature description in $ARGUMENTS. If unclear, ask for clarification.

  3. Break it down: Decompose the feature into small, independently testable increments. List them as a checklist.

  4. Launch the TDD coach: Use the Task tool to spawn the tdd-coach agent with the following prompt:

    Implement the following feature using strict TDD (red-green-refactor): Feature: $ARGUMENTS Test framework: [detected framework] Follow the red-green-refactor cycle for each increment. Write the failing test first, then the minimal implementation, then refactor. Run tests after each step.

  5. Verify: After the agent completes, run the full test suite to confirm everything passes.

  6. Report: Summarize what was built, how many tests were added, and the final test suite status.

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. 4d ago First seen · 29 lines · 17 tokens per session scan A 94fa804d7750

Subscribe to this mod's changes

tdd is a command published in the GitHub repository Claude-Code-Community-Ireland/claude-code-resources (10 stars, last pushed 3mo ago), licensed MIT. It adds 17 tokens to every session and 310 once invoked, about $0.0001 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 2026-08-31.