diagnosing-bugs

diagnosing-bugs is a skill for Claude Code, Codex from Dark-Alex-17/coyote. It costs 119 tokens per session (1,584 once invoked), scanned A, original, AGPL-3.0.

A debugging method for difficult code defects and performance slowdowns that starts with a repeatable failing test case, reduces it, tests several possible causes, and adds a regression test.

In plain words
What is it for?
Use it to investigate hard bugs or slow code, add focused diagnostic measurements, compare possible explanations, and preserve the fix with a test.
Why use it?
It reduces guesswork and helps ensure that the final fix addresses the actual cause without breaking later.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to investigate hard bugs or slow code, add focused diagnostic measurements, compare possible explanations, and preserve the fix with a test.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dark-alex-17/coyote/diagnosing-bugs
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 Dark-Alex-17/coyote --skill diagnosing-bugs
Clone the repo
git clone --depth 1 https://github.com/Dark-Alex-17/coyote

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/dark-alex-17/coyote/diagnosing-bugs/github.svg)](https://agentmods.dev/skills/dark-alex-17/coyote/diagnosing-bugs)
Your own site
<a href="https://agentmods.dev/skills/dark-alex-17/coyote/diagnosing-bugs"><img src="https://agentmods.dev/badge/skills/dark-alex-17/coyote/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/dark-alex-17/coyote/diagnosing-bugs"><img src="https://agentmods.dev/badge/skills/dark-alex-17/coyote/diagnosing-bugs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 119 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,584 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00119 $0.01584
Opus 5 $0.00060 $0.00792
Sonnet 5 $0.00024 $0.00317
Haiku 4.5 $0.00012 $0.00158

Measured 10d ago against content hash 07f13eb99bb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

diagnosing-bugs scanned grade A with 1 finding 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 10d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. **curl / HTTP script** against a running dev server.
assets/skills/diagnosing-bugs/SKILL.md · 83 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. 10d ago First seen · 83 lines · 119 tokens per session scan A 07f13eb99bb0

Subscribe to this mod's changes

diagnosing-bugs is a skill published in the GitHub repository Dark-Alex-17/coyote (57 stars, last pushed today), licensed AGPL-3.0. It adds 119 tokens to every session and 1,584 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories