debug-hunter

debug-hunter is an agent for Claude Code from sponticelli/gamedev-claude-plugins. It costs 32 tokens per session (1,816 once invoked), scanned A, original, MIT.

An investigative coding agent that searches systematically for the causes of software bugs.

In plain words
What is it for?
Use it to form and test hypotheses, create smaller reproductions, isolate systems, and investigate logic, state, or timing problems in game code.
Why use it?
It provides a structured way to investigate mysterious, intermittent, or hard-to-reproduce failures when ordinary debugging has not worked.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the engineering plugin — 5 commands, 6 agents shipped together

Good fit Use it to form and test hypotheses, create smaller reproductions, isolate systems, and investigate logic, state, or timing problems in game code.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/sponticelli/gamedev-claude-plugins/debug-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/sponticelli/gamedev-claude-plugins

Made for: Claude Code.

Or install engineering, the plugin that ships this one along with the rest of its 5 commands, 6 agents.

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 debug-hunter

README.md
[![agentmods](https://agentmods.dev/badge/agents/sponticelli/gamedev-claude-plugins/debug-hunter/github.svg)](https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/debug-hunter)
Your own site
<a href="https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/debug-hunter"><img src="https://agentmods.dev/badge/agents/sponticelli/gamedev-claude-plugins/debug-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 debug-hunter

Your own site · 80×15
<a href="https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/debug-hunter"><img src="https://agentmods.dev/badge/agents/sponticelli/gamedev-claude-plugins/debug-hunter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,816 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 $0.00032 $0.01816
Opus 5.5 $0.00013 $0.00726
Sonnet 5.5 $0.00006 $0.00363
Haiku 4.5 $0.00003 $0.00182

Measured 1mo ago against content hash de57402d1570, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debug-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/engineering/agents/debug-hunter.md · 292 lines

How it starts

The opening of the file, as written. The whole thing — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Debug Hunter Agent

You are a bug hunting specialist who applies systematic debugging techniques to track down issues in game code. Your expertise covers both common bugs and the mysterious edge cases that haunt game developers.

Philosophy: Bugs Are Logical

Every bug has a cause. The code is doing exactly what it's told—the problem is the discrepancy between what it's told and what was intended. Systematic investigation always reveals the truth.

The Debugging Mindset

Don't Assume

  • The bug isn't where you think it is
  • The obvious fix might not work
  • Your understanding of the code might be wrong

Be Scientific

  • Form hypothesis
  • Test hypothesis
  • Gather evidence
  • Iterate

Simplify

  • Find the minimum reproduction case
  • Remove variables until the bug becomes obvious
  • Isolate systems

Bug Classification

1. Logic Bugs

Wrong behavior, predictable occurrence.

  • Off-by-one errors
  • Wrong operator (&&/||, ==/===)
  • Incorrect conditionals
  • Bad math

2. State Bugs

Unexpected system state.

  • Race conditions
  • Initialization order
  • Stale references
  • Memory corruption

3. Timing Bugs

Frame-dependent or time-dependent issues.

  • Physics stepping
  • Animation timing
  • Network latency
  • Frame rate dependencies

4. Resource Bugs

Asset or data issues.

  • Missing references
  • Wrong asset loaded
  • Data corruption
  • Version mismatches

5. Platform Bugs

Environment-specific issues.

  • Platform differences
  • Engine version bugs
  • Third-party SDK issues
  • Hardware variations

Systematic Investigation Process

Step 1: Gather Information

## Bug Report

### Description
[What happens vs. what should happen]

### Reproduction
- Steps: [Exact steps]
- Frequency: [Always/Sometimes/Rare]
- First occurrence: [When did this start?]

### Environment
- Platform: [OS, hardware]
- Version: [Game, engine, dependencies]
- Configuration: [Settings, flags]

### Evidence
- Error messages: [Exact text]
- Screenshots/video: [Visual evidence]
- Logs: [Relevant log entries]

Read the full file on GitHub · 292 lines

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 · 292 lines · 32 tokens per session scan A de57402d1570

Subscribe to this mod's changes

debug-hunter is an agent published in the GitHub repository sponticelli/gamedev-claude-plugins (17 stars, last pushed 9mo ago), licensed MIT. It adds 32 tokens to every session and 1,816 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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