debug

A command that starts a debugging agent to investigate a reported software problem and fix it.

In plain words
What is it for?
Use it for root-cause analysis, testing possible explanations, implementing fixes, and checking that the fix works.
Why use it?
It helps trace an issue to its underlying cause instead of only treating its visible symptoms.

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/webdevtodayjason/sub-agents/debug
Clone the repo
git clone --depth 1 https://github.com/webdevtodayjason/sub-agents
Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 62 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 95% 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 $0.00007 $0.00062
Opus 5 $0.00003 $0.00031
Sonnet 5 $0.00001 $0.00012
Haiku 4.5 $0.00001 $0.00006

Measured yesterday against content hash 0661d84a05b8, 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 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

This is a copy

95% identical to debug — 1 line 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.

commands/debug.md · 8 lines

What it actually says

Use the debugger agent to analyze and fix the following issue: $ARGUMENTS. Perform root cause analysis, test hypotheses, and implement a proper fix with verification.

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 · 8 lines · 7 tokens per session scan A 0661d84a05b8

Subscribe to this mod's changes

debug is a command published in the GitHub repository webdevtodayjason/sub-agents (201 stars, last pushed 2mo ago), licensed MIT. It adds 7 tokens to every session and 62 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to debug, differing in 1 line, and is treated as a copy.