debug

A debugging command that investigates a specified software problem and attempts to fix it. It uses root-cause analysis, tests possible explanations, and verifies the result.

In plain words
What is it for?
Diagnosing bugs, testing possible causes, implementing a suitable correction, and checking that the correction works.
Why use it?
It gives a structured way to move from a reported problem to an evidence-based fix instead of guessing at the cause.

Command

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 commands/fengyunzaidushi/claude-code-subagents/debug
Clone the repo
git clone --depth 1 https://github.com/fengyunzaidushi/claude-code-subagents
Per session 5 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 64 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 $0.00005 $0.00064
Opus 5 $0.00003 $0.00032
Sonnet 5 $0.00001 $0.00013
Haiku 4.5 $0.00001 $0.00006

Measured 3d ago against content hash 75020f510fd6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debug 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 3d 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

Copies of this mod

3 near-identical copies found in the catalogue:

  • security-scan — 100% identical, 6 lines differ
  • refactor — 100% identical, 6 lines differ
  • test — 100% identical, 6 lines differ
commands/debug.md · 7 lines

What it actually says

使用调试器代理分析并修复以下问题:$ARGUMENTS。进行根本原因分析,测试假设,并实施适当的修复和验证。

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. 3d ago First seen · 7 lines · 5 tokens per session scan A 75020f510fd6

Subscribe to this mod's changes

debug is a command published in the GitHub repository fengyunzaidushi/claude-code-subagents (11 stars, last pushed 1y ago), licensed MIT. It adds 5 tokens to every session and 64 once invoked, about $0.0000 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.