symptom-check

symptom-check is a skill for Claude Code, Codex from benthamite/dotfiles. It costs 44 tokens per session (1,628 once invoked), scanned A, original, no licence file.

A root-cause check for non-trivial software bugs. It looks for rules or assumptions that the proposed small fix might leave broken.

In plain words
What is it for?
Use it after initial debugging when a bug fix seems tempting but the underlying cause, affected cases, or required invariants need closer examination.
Why use it?
A local patch can hide the real cause and allow the same problem to return elsewhere. This check helps confirm the broader behavior before changing code.

Skill for Claude CodeCodex

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/benthamite/dotfiles/symptom-check
Any agent
npx skills add benthamite/dotfiles --skill symptom-check
Clone the repo
git clone --depth 1 https://github.com/benthamite/dotfiles

Made for: Claude Code, Codex.

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 symptom-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/benthamite/dotfiles/symptom-check.svg)](https://agentmods.dev/skills/benthamite/dotfiles/symptom-check)
Your own site
<a href="https://agentmods.dev/skills/benthamite/dotfiles/symptom-check"><img src="https://agentmods.dev/badge/skills/benthamite/dotfiles/symptom-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,628 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00044 $0.01628
Opus 5 $0.00022 $0.00814
Sonnet 5 $0.00009 $0.00326
Haiku 4.5 $0.00004 $0.00163

Measured 4d ago against content hash f58d249b8fd8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

symptom-check 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.

claude/skills/symptom-check/SKILL.md · 113 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. 4d ago First seen · 113 lines · 44 tokens per session scan A f58d249b8fd8

Subscribe to this mod's changes

symptom-check is a skill published in the GitHub repository benthamite/dotfiles (11 stars, last pushed 1mo ago), with no licence file. It adds 44 tokens to every session and 1,628 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 2026-08-30.

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