neuro-book: Skill for Claude Code

.agents/skills/diagnosing-bugs/SKILL.md

diagnosing-bugs is a skill for Claude Code, Codex from notnotype/neuro-book. It costs 20 tokens per session (386 once invoked), scanned A, original, AGPL-3.0.

A structured process for investigating difficult bugs and slowdowns. It guides repeated checks of the problem, possible causes, and evidence from the software.

In plain words
What is it for?
Use it when code is broken, throws errors, fails tests, or becomes slow. It supports diagnosis of hard bugs and performance problems.
Why use it?
It gives debugging work a repeatable path when a failure or performance regression is not obvious. A performance regression means the software has become slower or uses more resources than before.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is notnotype/neuro-book's own configuration. It tells Claude Code and Codex how to work on neuro-book itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything neuro-book configures →

Reuse

Borrowing it

Nothing to install: this file belongs to notnotype/neuro-book. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/notnotype/neuro-book/master/.agents/skills/diagnosing-bugs/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/notnotype/neuro-book

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 diagnosing-bugs

README.md
[![agentmods](https://agentmods.dev/badge/skills/notnotype/neuro-book/diagnosing-bugs/github.svg)](https://agentmods.dev/skills/notnotype/neuro-book/diagnosing-bugs)
Your own site
<a href="https://agentmods.dev/skills/notnotype/neuro-book/diagnosing-bugs"><img src="https://agentmods.dev/badge/skills/notnotype/neuro-book/diagnosing-bugs/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 diagnosing-bugs

Your own site · 80×15
<a href="https://agentmods.dev/skills/notnotype/neuro-book/diagnosing-bugs"><img src="https://agentmods.dev/badge/skills/notnotype/neuro-book/diagnosing-bugs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 386 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00020 $0.00386
Opus 5 $0.00010 $0.00193
Sonnet 5 $0.00004 $0.00077
Haiku 4.5 $0.00002 $0.00039

Measured yesterday against content hash 5fd53aa7aff8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

diagnosing-bugs 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 yesterday.

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.

.agents/skills/diagnosing-bugs/SKILL.md · 20 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. yesterday Changed · -120 lines · -20 tokens per session 5fd53aa7aff8
  2. 10d ago First seen · 140 lines · 40 tokens per session scan A 18388a4cd8c6

Subscribe to this mod's changes

diagnosing-bugs is a skill published in the GitHub repository notnotype/neuro-book (631 stars, last pushed today), licensed AGPL-3.0. It adds 20 tokens to every session and 386 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 2026-08-30.