debugger

A specialist for finding why software fails or behaves unexpectedly. It examines errors, logs, recent changes, execution paths, and program state to trace symptoms back to a root cause.

In plain words
What is it for?
Use it for error messages, stack traces, failing tests, unexpected results, difficult-to-reproduce bugs, targeted debug logging, minimal code fixes, and prevention recommendations.
Why use it?
It replaces guesswork with a reproducible investigation and evidence-based fix. It also helps verify the repair and suggest ways to prevent the same failure.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/echovic/blade-code/debugger
Clone the repo
git clone --depth 1 https://github.com/echoVic/blade-code

Made for: Claude Code.

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 157 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00023 $0.00157
Opus 5 $0.00012 $0.00078
Sonnet 5 $0.00005 $0.00031
Haiku 4.5 $0.00002 $0.00016

Measured yesterday against content hash 15163e355ebc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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

Copies of this mod

5 near-identical copies found in the catalogue:

  • debugger — 100% identical, 0 lines differ
  • debugger — 100% identical, 0 lines differ
  • debugger — 89% identical, 2 lines differ
  • debugger — 89% identical, 8 lines differ
  • debugger — 88% identical, 4 lines differ
.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. yesterday First seen · 31 lines · 23 tokens per session scan A 15163e355ebc

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository echoVic/blade-code (177 stars, last pushed yesterday), licensed MIT. It adds 23 tokens to every session and 157 once invoked, about $0.0001 per session on Opus 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.