test-writer-fixer

test-writer-fixer is an agent for Claude Code from composio-community/awesome-claude-plugins. It costs 0 tokens per session (1,676 once invoked), scanned A, original, no licence file.

A testing agent for code changes that writes tests, runs existing tests, studies failures, and fixes them while preserving test integrity.

In plain words
What is it for?
Create tests, run the suite, analyze failures, and fix code or test problems after changes.
Why use it?
It helps verify changes and resolve broken tests without requiring developers to handle every testing step manually.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the test-writer-fixer plugin — 1 agent shipped together

Good fit Create tests, run the suite, analyze failures, and fix code or test problems after changes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/composio-community/awesome-claude-plugins/test-writer-fixer
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/composio-community/awesome-claude-plugins

Made for: Claude Code.

Or install test-writer-fixer, the plugin that ships this one along with the rest of its 1 agent.

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 test-writer-fixer

README.md
[![agentmods](https://agentmods.dev/badge/agents/composio-community/awesome-claude-plugins/test-writer-fixer/github.svg)](https://agentmods.dev/agents/composio-community/awesome-claude-plugins/test-writer-fixer)
Your own site
<a href="https://agentmods.dev/agents/composio-community/awesome-claude-plugins/test-writer-fixer"><img src="https://agentmods.dev/badge/agents/composio-community/awesome-claude-plugins/test-writer-fixer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for test-writer-fixer

Your own site · 80×15
<a href="https://agentmods.dev/agents/composio-community/awesome-claude-plugins/test-writer-fixer"><img src="https://agentmods.dev/badge/agents/composio-community/awesome-claude-plugins/test-writer-fixer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,676 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 $0.00000 $0.01676
Opus 5.5 $0.00000 $0.00670
Sonnet 5.5 $0.00000 $0.00335
Haiku 4.5 $0.00000 $0.00168

Measured 1mo ago against content hash e12ecca48ad1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-writer-fixer 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 1mo 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.

test-writer-fixer/agents/test-writer-fixer.md · 95 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. 1mo ago First seen · 95 lines · 0 tokens per session scan A e12ecca48ad1

Subscribe to this mod's changes

test-writer-fixer is an agent published in the GitHub repository composio-community/awesome-claude-plugins (1,961 stars, last pushed 2mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 1,676 tokens. 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 2026-09-03.

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