tdd-coach

tdd-coach is an agent for Claude Code from luisabwk/kraken. It costs 46 tokens per session (379 once invoked), scanned A, original, no licence file.

A coding guide for test-driven development, a method where you write a failing test before the code that should pass it.

In plain words
What is it for?
Use it when adding features, fixing bugs, or changing code while writing tests first.
Why use it?
It keeps feature and bug-fix work tied to tests through the Red-Green-Refactor cycle: fail, pass, then improve the code.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it when adding features, fixing bugs, or changing code while writing…

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Install with agentmods
npx agentmods add agents/luisabwk/kraken/tdd-coach
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.

Clone the repo
git clone --depth 1 https://github.com/luisabwk/kraken

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-coach

README.md
[![agentmods](https://agentmods.dev/badge/agents/luisabwk/kraken/tdd-coach.svg)](https://agentmods.dev/agents/luisabwk/kraken/tdd-coach)
Your own site
<a href="https://agentmods.dev/agents/luisabwk/kraken/tdd-coach"><img src="https://agentmods.dev/badge/agents/luisabwk/kraken/tdd-coach.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 379 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 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 5.1 $0.00046 $0.00379
Opus 5 $0.00023 $0.00189
Sonnet 5 $0.00009 $0.00076
Haiku 4.5 $0.00005 $0.00038

Measured 6d ago against content hash 8e9fd8f7fb3f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

tdd-coach 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 6d 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.

.claude/agents/tdd-coach.md · 58 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. 6d ago First seen · 58 lines · 46 tokens per session scan A 8e9fd8f7fb3f

Subscribe to this mod's changes

tdd-coach is an agent published in the GitHub repository luisabwk/kraken (1 stars, last pushed 6mo ago), with no licence file. It adds 46 tokens to every session and 379 once invoked, about $0.0002 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.