decide-test-merit

decide-test-merit is a skill for Claude Code from attac-t/the-foundry. It costs 27 tokens per session (788 once invoked), scanned A, original, no licence file.

A skill for deciding whether a test is worth keeping in a codebase. Tests are checks that help show whether software still behaves as expected.

In plain words
What is it for?
Use it when reviewing or reducing a test suite and when judging whether each test justifies its maintenance cost.
Why use it?
It helps identify tests that add little value and decide when removing one is appropriate.

Skill for Claude Code

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

Part of the kernel plugin — 39 skills, 11 commands, 1 agent shipped together

Good fit Use it when reviewing or reducing a test suite and when judging whether each test justifies its maintenance cost.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/attac-t/the-foundry/decide-test-merit
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.

Any agent
npx skills add attac-t/the-foundry --skill decide-test-merit
Clone the repo
git clone --depth 1 https://github.com/attac-t/the-foundry

Made for: Claude Code.

Or install kernel, the plugin that ships this one along with the rest of its 39 skills, 11 commands, 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 decide-test-merit

README.md
[![agentmods](https://agentmods.dev/badge/skills/attac-t/the-foundry/decide-test-merit/github.svg)](https://agentmods.dev/skills/attac-t/the-foundry/decide-test-merit)
Your own site
<a href="https://agentmods.dev/skills/attac-t/the-foundry/decide-test-merit"><img src="https://agentmods.dev/badge/skills/attac-t/the-foundry/decide-test-merit/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 decide-test-merit

Your own site · 80×15
<a href="https://agentmods.dev/skills/attac-t/the-foundry/decide-test-merit"><img src="https://agentmods.dev/badge/skills/attac-t/the-foundry/decide-test-merit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 788 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 $0.00027 $0.00788
Opus 5 $0.00014 $0.00394
Sonnet 5 $0.00005 $0.00158
Haiku 4.5 $0.00003 $0.00079

Measured 8d ago against content hash 685c17553774, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

decide-test-merit 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 8d 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/kernel/skills/decide-test-merit/SKILL.md · 89 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. 8d ago First seen · 89 lines · 27 tokens per session scan A 685c17553774

Subscribe to this mod's changes

decide-test-merit is a skill published in the GitHub repository attac-t/the-foundry (1 stars, last pushed today), with no licence file. It adds 27 tokens to every session and 788 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 2026-08-31.

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