red-green-refactor

red-green-refactor is a command for Claude Code from el-feo/ai-context. It costs 12 tokens per session (262 once invoked), scanned A, original, MIT.

A command for Test-Driven Development (TDD), a method of writing a failing test before the code that makes it pass, then cleaning up the code.

In plain words
What is it for?
Use it to run a red-green-refactor cycle: create one failing test, write the smallest passing implementation, and improve the code without changing its behavior.
Why use it?
It gives a clear repeatable cycle for developing code in small steps while checking behavior as you go.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the ruby-rails plugin — 13 skills, 3 commands shipped together

Good fit Use it to run a red-green-refactor cycle: create one failing test, write…

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Install with agentmods
npx agentmods add commands/el-feo/ai-context/red-green-refactor
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/el-feo/ai-context

Made for: Claude Code.

Or install ruby-rails, the plugin that ships this one along with the rest of its 13 skills, 3 commands.

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 red-green-refactor

README.md
[![agentmods](https://agentmods.dev/badge/commands/el-feo/ai-context/red-green-refactor.svg)](https://agentmods.dev/commands/el-feo/ai-context/red-green-refactor)
Your own site
<a href="https://agentmods.dev/commands/el-feo/ai-context/red-green-refactor"><img src="https://agentmods.dev/badge/commands/el-feo/ai-context/red-green-refactor.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 262 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 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 5.1 $0.00012 $0.00262
Opus 5 $0.00006 $0.00131
Sonnet 5 $0.00002 $0.00052
Haiku 4.5 $0.00001 $0.00026

Measured 7d ago against content hash bef5e8c62c12, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

red-green-refactor 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 7d 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/ruby-rails/commands/red-green-refactor.md · 30 lines

What it actually says

<success_criteria> Each cycle completes when:

  • A single failing test exists (red)
  • Minimal code is written to pass that test (green)
  • Code is cleaned up without changing behavior (refactor) </success_criteria>
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. 7d ago First seen · 30 lines · 12 tokens per session scan A bef5e8c62c12

Subscribe to this mod's changes

red-green-refactor is a command published in the GitHub repository el-feo/ai-context (12 stars, last pushed 1mo ago), licensed MIT. It adds 12 tokens to every session and 262 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.