A step-by-step method for finding the root cause of software bugs in websites, servers, and mobile apps.

Use it to reproduce a bug, investigate why something is broken, and trace the problem toward its underlying cause.

It replaces guesswork with a structured investigation when software freezes, shows errors, loads endlessly, returns incorrect data, or behaves unexpectedly.

bug-hunt — Skill for Claude Code and Codex by coderPerseus/skills

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 coderPerseus/skills --skill bug-hunt

Clone the repo

git clone --depth 1 https://github.com/coderPerseus/skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/coderperseus/skills/bug-hunt/github.svg)](https://agentmods.dev/skills/coderperseus/skills/bug-hunt)

Your own site

<a href="https://agentmods.dev/skills/coderperseus/skills/bug-hunt"><img src="https://agentmods.dev/badge/skills/coderperseus/skills/bug-hunt/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/coderperseus/skills/bug-hunt"><img src="https://agentmods.dev/badge/skills/coderperseus/skills/bug-hunt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,301 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00135	$0.01301
Opus 5.5	$0.00054	$0.00520
Sonnet 5.5	$0.00027	$0.00260
Haiku 4.5	$0.00014	$0.00130

Measured 2mo ago against content hash 3e280ee4fcae, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bug-hunt 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/install.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/bug-hunt/SKILL.md · 75 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

13 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 75 lines · 135 tokens per session scan A 3e280ee4fcae

Subscribe to this mod's changes

bug-hunt is a skill published in the GitHub repository coderPerseus/skills (2 stars, last pushed 10d ago), with no licence file. It adds 135 tokens to every session and 1,301 once invoked, about $0.0005 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 2026-08-31.

Debugging agentskills skills

bug-hunt next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
bug-huntcoderPerseus/skills	Skill	2	10d ago	none	A	135	Claude Code, Codex
reproduce-and-fix-issuesbacknotprop/pstack	Skill	3.8k	yesterday	MIT	A	48	Claude Code, Cursor
triage-issue-reportsbacknotprop/pstack	Skill	3.8k	yesterday	MIT	A	46	Claude Code, Cursor
analyze-kernel-bottleneckpjt222/agent-almanac	Skill	43	yesterday	MIT	A	77	Claude Code
conduct-empirical-wire-capturepjt222/agent-almanac	Skill	43	yesterday	MIT	A	117	Claude Code
decode-minified-js-gatespjt222/agent-almanac	Skill	43	yesterday	MIT	A	138	Claude Code
correlate-observability-signalspjt222/agent-almanac	Skill	43	yesterday	MIT	A	83	Claude Code