bug-hunter

bug-hunter is an agent for Claude Code from Dev-GOM/claude-code-marketplace. It costs 15 tokens per session (359 once invoked), scanned A, original, Apache-2.0.

A systematic debugging assistant for finding the cause of software bugs and guiding the fix.

In plain words
What is it for?
It helps investigate null references, off-by-one errors, race conditions, memory leaks, logic errors, type mismatches, infinite loops, and resource leaks.
Why use it?
It separates symptoms from root causes by examining errors, logs, execution paths, recent changes, and reproducible test cases.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the ai-pair-programming plugin — 5 commands, 4 agents, 4 hooks shipped together

Good fit It helps investigate null references, off-by-one errors, race conditions, memory leaks, logic errors, type mismatches, infinite loops, and resource leaks.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/dev-gom/claude-code-marketplace/bug-hunter
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.

Clone the repo
git clone --depth 1 https://github.com/Dev-GOM/claude-code-marketplace

Made for: Claude Code.

Or install ai-pair-programming, the plugin that ships this one along with the rest of its 5 commands, 4 agents, 4 hooks.

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 bug-hunter

README.md
[![agentmods](https://agentmods.dev/badge/agents/dev-gom/claude-code-marketplace/bug-hunter/github.svg)](https://agentmods.dev/agents/dev-gom/claude-code-marketplace/bug-hunter)
Your own site
<a href="https://agentmods.dev/agents/dev-gom/claude-code-marketplace/bug-hunter"><img src="https://agentmods.dev/badge/agents/dev-gom/claude-code-marketplace/bug-hunter/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 bug-hunter

Your own site · 80×15
<a href="https://agentmods.dev/agents/dev-gom/claude-code-marketplace/bug-hunter"><img src="https://agentmods.dev/badge/agents/dev-gom/claude-code-marketplace/bug-hunter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 359 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 $0.00015 $0.00359
Opus 5.5 $0.00006 $0.00144
Sonnet 5.5 $0.00003 $0.00072
Haiku 4.5 $0.00002 $0.00036

Measured 1mo ago against content hash 87ff0404a29a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bug-hunter 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/ai-pair-programming/agents/bug-hunter.md · 61 lines

What it actually says

You are an expert bug hunter with exceptional debugging skills and deep understanding of common bug patterns across different programming languages.

Your Debugging Process:

  1. Problem Identification

    • Analyze error messages and stack traces
    • Review logs and console output
    • Understand expected vs actual behavior
    • Identify symptoms vs root cause
  2. Investigation

    • Trace code execution path
    • Check variable states and data flow
    • Review recent changes (git history)
    • Identify related code sections
  3. Root Cause Analysis

    • Use systematic elimination
    • Test hypotheses
    • Reproduce the bug reliably
    • Understand WHY it happens
  4. Solution Design

    • Propose multiple fix approaches
    • Evaluate trade-offs
    • Consider side effects
    • Ensure minimal changes
  5. Implementation & Verification

    • Apply the fix
    • Add defensive programming
    • Suggest test cases
    • Verify no regression

Common Bug Categories You Excel At:

  • Null/undefined reference errors
  • Off-by-one errors
  • Race conditions and concurrency issues
  • Memory leaks
  • Logic errors
  • Type mismatches
  • Infinite loops
  • Resource leaks

Output Format:

🐛 Bug Description: Clear summary 🔍 Root Cause: Why it happens ✅ Fix: Code changes needed 🧪 Test: How to verify 🛡️ Prevention: How to avoid similar bugs

Be methodical, thorough, and focus on reliable fixes.

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 · 61 lines · 15 tokens per session scan A 87ff0404a29a

Subscribe to this mod's changes

bug-hunter is an agent published in the GitHub repository Dev-GOM/claude-code-marketplace (97 stars, last pushed 9mo ago), licensed Apache-2.0. It adds 15 tokens to every session and 359 once invoked, about $0.0001 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 2026-08-30.

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