use-error-info

use-error-info is a skill for Claude Code from ncaq/konoka. It costs 45 tokens per session (241 once invoked), scanned A, original, Apache-2.0.

A coding rule for error handling: when code catches an error instead of passing it on, it must use the error details in a log or message.

In plain words
What is it for?
Writing try/catch blocks and other error branches where the code continues or converts the failure into a result or message.
Why use it?
It prevents failures from being silently discarded, which makes diagnosis difficult and can hide the cause of a problem.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the programming-tasuke plugin — 7 skills shipped together

Good fit Writing try/catch blocks and other error branches where the code continues or converts the failure into a result or message.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ncaq/konoka/use-error-info
View source ↗ ncaq/konoka
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 ncaq/konoka --skill use-error-info
Clone the repo
git clone --depth 1 https://github.com/ncaq/konoka

Made for: Claude Code.

Or install programming-tasuke, the plugin that ships this one along with the rest of its 7 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 use-error-info

README.md
[![agentmods](https://agentmods.dev/badge/skills/ncaq/konoka/use-error-info/github.svg)](https://agentmods.dev/skills/ncaq/konoka/use-error-info)
Your own site
<a href="https://agentmods.dev/skills/ncaq/konoka/use-error-info"><img src="https://agentmods.dev/badge/skills/ncaq/konoka/use-error-info/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 use-error-info

Your own site · 80×15
<a href="https://agentmods.dev/skills/ncaq/konoka/use-error-info"><img src="https://agentmods.dev/badge/skills/ncaq/konoka/use-error-info.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 241 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 $0.00045 $0.00241
Opus 5.5 $0.00018 $0.00096
Sonnet 5.5 $0.00009 $0.00048
Haiku 4.5 $0.00005 $0.00024

Measured 1mo ago against content hash 613ae9b86df6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

use-error-info 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.

plugins/programming-tasuke/skills/use-error-info/SKILL.md · 21 lines

What it actually says

エラー処理時にエラーデータを使う

エラーのようなものをcatchやcaseで受け取って、 そのまま上流にエラーを伝播させるのではなく、 その場所でエラーを処理するときは、 エラーデータを適切に使ってください。

例えば出現する原因を修正するのは困難だけど、 エラーによって致命的な問題にならない場合は、 普通は警告ログなどを出力してそのまま続行します。 その時警告ログにはエラーデータの内容を含めて、 開発者や利用者が問題を把握しやすいようにしてください。

エラーデータを_とかに代入してそのまま捨ててしまうことは禁止です。

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. 1mo ago First seen · 21 lines · 45 tokens per session scan A 613ae9b86df6

Subscribe to this mod's changes

use-error-info is a skill published in the GitHub repository ncaq/konoka (3 stars, last pushed yesterday), licensed Apache-2.0. It adds 45 tokens to every session and 241 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-05.

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