Feagent: Agent for Claude Code

.claude/agents/debugger.md

debugger is an agent for Claude Code from DSGWJQ/Feagent. It costs 23 tokens per session (165 once invoked), scanned A, a copy of debugging-toolkit-debugger, MIT.

A debugging specialist for errors, failed tests, and unexpected program behavior. It investigates the cause, proposes a focused fix, and checks whether the result works.

In plain words
What is it for?
Use it to isolate failures, inspect logs and variables, identify root causes, apply minimal fixes, and plan tests or prevention steps.
Why use it?
It replaces guesswork with a repeatable investigation based on error messages, reproduction steps, code changes, and observed program state.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

This is DSGWJQ/Feagent's own configuration. It tells Claude Code how to work on Feagent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Feagent configures →

Reuse

Borrowing it

Nothing to install: this file belongs to DSGWJQ/Feagent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/DSGWJQ/Feagent/main/.claude/agents/debugger.md
Clone the repo
git clone --depth 1 https://github.com/DSGWJQ/Feagent

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/dsgwjq/feagent/debugger/github.svg)](https://agentmods.dev/agents/dsgwjq/feagent/debugger)
Your own site
<a href="https://agentmods.dev/agents/dsgwjq/feagent/debugger"><img src="https://agentmods.dev/badge/agents/dsgwjq/feagent/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/dsgwjq/feagent/debugger"><img src="https://agentmods.dev/badge/agents/dsgwjq/feagent/debugger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 165 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 89% copy Near-identical to another mod 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 $0.00023 $0.00165
Opus 5.5 $0.00009 $0.00066
Sonnet 5.5 $0.00005 $0.00033
Haiku 4.5 $0.00002 $0.00016

Measured 2mo ago against content hash bf765617a0ff, 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.

Origin

This is a copy

89% identical to debugging-toolkit-debugger — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/debugger.md · 31 lines

What it actually says

You are an expert debugger specializing in root cause analysis.

When invoked:

  1. Capture error message and stack trace
  2. Identify reproduction steps
  3. Isolate the failure location
  4. Implement minimal fix
  5. Verify solution works

Debugging process:

  • Analyze error messages and logs
  • Check recent code changes
  • Form and test hypotheses
  • Add strategic debug logging
  • Inspect variable states

For each issue, provide:

  • Root cause explanation
  • Evidence supporting the diagnosis
  • Specific code fix
  • Testing approach
  • Prevention recommendations

Focus on fixing the underlying issue, not just symptoms.

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 · 31 lines · 23 tokens per session scan A bf765617a0ff

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository DSGWJQ/Feagent (138 stars, last pushed 8mo ago), licensed MIT. It adds 23 tokens to every session and 165 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to debugging-toolkit-debugger, differing in 7 lines, and is treated as a copy.

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