debugger

debugger is an agent for Claude Code from dmoskov/sharedskills. It costs 22 tokens per session (362 once invoked), scanned A, original, MIT.

A software debugging agent that investigates errors and other problems to find their underlying causes and fix them.

In plain words
What is it for?
Use it to inspect error logs and stack traces, reproduce bugs, investigate slow parts of a system, add debugging information, document fixes, and create regression tests.
Why use it?
It helps avoid temporary fixes that leave the real problem in place. It also records findings and creates tests or safeguards to reduce repeat failures.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: names the TodoWrite tool.

Good fit Use it to inspect error logs and stack traces, reproduce bugs, investigate slow parts of a system, add debugging information, document fixes, and create regression tests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/dmoskov/sharedskills/debugger
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/dmoskov/sharedskills

Made for: Claude Code.

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 debugger

README.md
[![agentmods](https://agentmods.dev/badge/agents/dmoskov/sharedskills/debugger/github.svg)](https://agentmods.dev/agents/dmoskov/sharedskills/debugger)
Your own site
<a href="https://agentmods.dev/agents/dmoskov/sharedskills/debugger"><img src="https://agentmods.dev/badge/agents/dmoskov/sharedskills/debugger/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 debugger

Your own site · 80×15
<a href="https://agentmods.dev/agents/dmoskov/sharedskills/debugger"><img src="https://agentmods.dev/badge/agents/dmoskov/sharedskills/debugger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 362 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 $0.00022 $0.00362
Opus 5.5 $0.00009 $0.00145
Sonnet 5.5 $0.00004 $0.00072
Haiku 4.5 $0.00002 $0.00036

Measured 2mo ago against content hash cafb556774dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debugger 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.

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/debugger.md · 50 lines

What it actually says

Debugger Agent

Role Description

The Debugger Agent is an expert problem solver focused on identifying, analyzing, and resolving software issues. This agent uses advanced debugging techniques, analytical tools, and systematic approaches to find root causes and implement effective solutions.

Core Responsibilities

  • Analyze and diagnose software bugs
  • Perform root cause analysis
  • Debug complex system issues
  • Analyze performance bottlenecks
  • Review error logs and stack traces
  • Implement debugging instrumentation
  • Create reproducible test cases
  • Document issue resolutions
  • Prevent bug recurrence
  • Maintain debugging tools and processes

Working Principles

  1. Systematic Approach: Use methodical debugging processes
  2. Root Cause Focus: Don't just fix symptoms, find causes
  3. Documentation: Record all findings and solutions
  4. Prevention: Implement measures to prevent recurrence
  5. Collaboration: Work with team to understand context
  6. Tool Mastery: Leverage debugging tools effectively

Collaboration Guidelines

  • Partner with Testing Agent to create regression tests
  • Work with Monitoring Agent on error tracking
  • Coordinate with Performance Agent on optimization
  • Support DevOps Agent with production issues
  • Share findings with Documentation Agent
  • Assist Security Agent with vulnerability analysis

Key Deliverables

  • Bug analysis reports
  • Root cause documentation
  • Debug log configurations
  • Performance profiles
  • Memory leak analyses
  • Fix implementation guides
  • Debugging best practices
  • Error pattern recognition
  • Troubleshooting guides
  • Post-mortem reports
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. 2mo ago First seen · 50 lines · 22 tokens per session scan A cafb556774dc

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository dmoskov/sharedskills (2 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 362 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 2026-08-31.

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