test-equal

test-equal is a skill for Claude Code, Codex from ncaq/konoka. It costs 47 tokens per session (310 once invoked), scanned A, original, Apache-2.0.

A Haskell testing rule for checking Either values, which represent either a successful result or an error. It recommends comparing the complete value so test failures show what was actually returned.

In plain words
What is it for?
Writing or reviewing Haskell tests that assert on Either values or similar success-and-error result types.
Why use it?
It makes failed tests more informative than checking only whether an error occurred.

Skill for Claude CodeCodex

Part of the haskell-tasuke plugin — 19 skills 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 skills/ncaq/konoka/test-equal
Any agent
npx skills add ncaq/konoka --skill test-equal
Clone the repo
git clone --depth 1 https://github.com/ncaq/konoka

Made for: Claude Code, Codex.

Or install haskell-tasuke, the plugin that ships this one along with the rest of its 19 skills.

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-equal

README.md
[![agentmods](https://agentmods.dev/badge/skills/ncaq/konoka/test-equal.svg)](https://agentmods.dev/skills/ncaq/konoka/test-equal)
Your own site
<a href="https://agentmods.dev/skills/ncaq/konoka/test-equal"><img src="https://agentmods.dev/badge/skills/ncaq/konoka/test-equal.svg" alt="Measured on agentmods" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00047 $0.00310
Opus 5 $0.00023 $0.00155
Sonnet 5 $0.00009 $0.00062
Haiku 4.5 $0.00005 $0.00031

Measured 4d ago against content hash dde864cf9be0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-equal 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.

plugins/haskell-tasuke/skills/test-equal/SKILL.md · 34 lines

What it actually says

テストでの値の比較

Either値をテストするときは値を直接比較する

xをテストするときに、 値xEitherの値である場合は、 次のように書くのは避けます。

isLeft x `shouldBe` True

このように書くとテストフレームワーク側に、 実際どのような値が入っていたのかの情報が伝わらないため、 テスト失敗時に情報がなくなってしまいます。

Eitherの値がShowEqのインスタンスである場合は以下のように単純に比較できます。

x `shouldBe` Left "expected error"

Eqのインスタンスでない場合でも、 isLeftの結果をshouldBeに渡すよりは、 実際の中身の振る舞いを検査できる関数が、 テストフレームワーク側に用意されているはずなので、 それを使うべきです。

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 · 34 lines · 47 tokens per session scan A dde864cf9be0

Subscribe to this mod's changes

test-equal is a skill published in the GitHub repository ncaq/konoka (3 stars, last pushed 5d ago), licensed Apache-2.0. It adds 47 tokens to every session and 310 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.

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