tdd

tdd is a command for Claude Code from raja21068/AutoResearch. It costs 11 tokens per session (427 once invoked), scanned A, a copy of tdd, MIT.

A command that enforces test-driven development (TDD), a process of writing a failing test before the code that makes it pass.

In plain words
What is it for?
Use it to define TypeScript interfaces, write and run failing tests, implement the minimum code, refactor it, and check test coverage.
Why use it?
It creates a repeatable RED-GREEN-REFACTOR cycle and requires tests for normal cases, edge cases, and errors.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: agent in frontmatter.

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/raja21068/autoresearch/tdd
Clone the repo
git clone --depth 1 https://github.com/raja21068/AutoResearch

Made for: Claude Code.

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/raja21068/autoresearch/tdd.svg)](https://agentmods.dev/commands/raja21068/autoresearch/tdd)
Your own site
<a href="https://agentmods.dev/commands/raja21068/autoresearch/tdd"><img src="https://agentmods.dev/badge/commands/raja21068/autoresearch/tdd.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 427 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 98% 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 $0.00011 $0.00427
Opus 5 $0.00005 $0.00214
Sonnet 5 $0.00002 $0.00085
Haiku 4.5 $0.00001 $0.00043

Measured 2d ago against content hash 5c8d0b92deba, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 2d 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

98% identical to tdd — 2 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.

skills/commands/tdd.md · 67 lines

What it actually says

TDD Command

Implement the following using strict test-driven development: $ARGUMENTS

TDD Cycle (MANDATORY)

RED → GREEN → REFACTOR → REPEAT
  1. RED: Write a failing test FIRST
  2. GREEN: Write minimal code to pass the test
  3. REFACTOR: Improve code while keeping tests green
  4. REPEAT: Continue until feature complete

Your Task

Step 1: Define Interfaces (SCAFFOLD)

  • Define TypeScript interfaces for inputs/outputs
  • Create function signature with throw new Error('Not implemented')

Step 2: Write Failing Tests (RED)

  • Write tests that exercise the interface
  • Include happy path, edge cases, and error conditions
  • Run tests - verify they FAIL

Step 3: Implement Minimal Code (GREEN)

  • Write just enough code to make tests pass
  • No premature optimization
  • Run tests - verify they PASS

Step 4: Refactor (IMPROVE)

  • Extract constants, improve naming
  • Remove duplication
  • Run tests - verify they still PASS

Step 5: Check Coverage

  • Target: 80% minimum
  • 100% for critical business logic
  • Add more tests if needed

Coverage Requirements

Code Type Minimum
Standard code 80%
Financial calculations 100%
Authentication logic 100%
Security-critical code 100%

Test Types to Include

  • Unit Tests: Individual functions
  • Edge Cases: Empty, null, max values, boundaries
  • Error Conditions: Invalid inputs, network failures
  • Integration Tests: API endpoints, database operations

MANDATORY: Tests must be written BEFORE implementation. Never skip the RED phase.

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. 2d ago First seen · 67 lines · 11 tokens per session scan A 5c8d0b92deba

Subscribe to this mod's changes

tdd is a command published in the GitHub repository raja21068/AutoResearch (2 stars, last pushed 3mo ago), licensed MIT. It adds 11 tokens to every session and 427 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to tdd, differing in 2 lines, and is treated as a copy.