tdd

tdd is a command for coding agents from adongwanai/adong-vibecoding. It costs 28 tokens per session (2,216 once invoked), scanned A, original, no licence file.

A command for test-driven development, a method where tests are written before the code they check. It creates interfaces, writes the tests first, and then builds the smallest implementation that passes them.

In plain words
What is it for?
Use it when building new code with a test-first workflow and a target of at least 80% test coverage.
Why use it?
It makes the expected behavior explicit before implementation and checks that the finished code meets it.

Command

Part of the adong-vibecoding plugin — 11 skills, 15 commands, 9 agents, 6 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/adongwanai/adong-vibecoding/tdd
Clone the repo
git clone --depth 1 https://github.com/adongwanai/adong-vibecoding

Or install adong-vibecoding, the plugin that ships this one along with the rest of its 11 skills, 15 commands, 9 agents, 6 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/adongwanai/adong-vibecoding/tdd.svg)](https://agentmods.dev/commands/adongwanai/adong-vibecoding/tdd)
Your own site
<a href="https://agentmods.dev/commands/adongwanai/adong-vibecoding/tdd"><img src="https://agentmods.dev/badge/commands/adongwanai/adong-vibecoding/tdd.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,216 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00028 $0.02216
Opus 5 $0.00014 $0.01108
Sonnet 5 $0.00006 $0.00443
Haiku 4.5 $0.00003 $0.00222

Measured 4d ago against content hash 1a39722b8c90, 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.

commands/tdd.md · 327 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 327 lines · 28 tokens per session scan A 1a39722b8c90

Subscribe to this mod's changes

tdd is a command published in the GitHub repository adongwanai/adong-vibecoding (11 stars, last pushed 7mo ago), with no licence file. It adds 28 tokens to every session and 2,216 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 2026-08-30.