debug-this

debug-this is a command for Claude Code from latestaiagents/agent-skills. It costs 10 tokens per session (824 once invoked), scanned A, original, MIT.

A structured debugging command that guides an investigation from reproducing a bug to forming ranked explanations, gathering evidence, and applying a fix.

In plain words
What is it for?
Use it when a bug needs reliable reproduction, hypothesis testing, diagnostic logging, database checks, and a verified correction.
Why use it?
It replaces guesswork with a record of expected and actual behavior, reproduction details, error messages, and checks for each possible cause.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the latestaiagents plugin — 47 skills, 10 commands, 7 plugins shipped together

Good fit Use it when a bug needs reliable reproduction, hypothesis testing, diagnostic logging, database checks, and a verified correction.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/latestaiagents/agent-skills/debug-this
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/latestaiagents/agent-skills

Made for: Claude Code.

Or install latestaiagents, the plugin that ships this one along with the rest of its 47 skills, 10 commands, 7 plugins.

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 debug-this

README.md
[![agentmods](https://agentmods.dev/badge/commands/latestaiagents/agent-skills/debug-this/github.svg)](https://agentmods.dev/commands/latestaiagents/agent-skills/debug-this)
Your own site
<a href="https://agentmods.dev/commands/latestaiagents/agent-skills/debug-this"><img src="https://agentmods.dev/badge/commands/latestaiagents/agent-skills/debug-this/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 debug-this

Your own site · 80×15
<a href="https://agentmods.dev/commands/latestaiagents/agent-skills/debug-this"><img src="https://agentmods.dev/badge/commands/latestaiagents/agent-skills/debug-this.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 10 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 824 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00010 $0.00824
Opus 5.5 $0.00004 $0.00330
Sonnet 5.5 $0.00002 $0.00165
Haiku 4.5 $0.00001 $0.00082

Measured 1mo ago against content hash 26b0a500fefa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debug-this scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -v https://api.example.com/endpoint
commands/debug-this.md · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/debug-this

Structured debugging workflow. Describe the bug and I'll help you find and fix it.

Describe the Bug

Tell me:

  1. What should happen? (expected behavior)
  2. What actually happens? (actual behavior)
  3. When did it start? (recent changes?)
  4. Error messages? (paste any errors)

Debugging Workflow

Step 1: Reproduce the Bug

First, I need to reliably trigger the bug:

## Reproduction Steps
1. [Step to reproduce]
2. [Step to reproduce]
3. [Bug occurs]

**Reproducible:** Always / Sometimes / Rarely
**Environment:** Dev / Staging / Prod
**Affected users:** All / Some / One

Step 2: Form Hypotheses

Based on symptoms, I'll generate hypotheses ranked by likelihood:

## Hypotheses

1. **[Most likely]** Description
   - Evidence for: ...
   - Evidence against: ...
   - How to verify: ...

2. **[Second likely]** Description
   - Evidence for: ...
   - Evidence against: ...
   - How to verify: ...

3. **[Third likely]** Description
   - ...

Step 3: Gather Evidence

For each hypothesis, I'll suggest specific checks:

// Add diagnostic logging
console.log('[DEBUG] Variable state:', { var1, var2, var3 });

// Check database state
SELECT * FROM orders WHERE id = 123;

// Verify API responses
curl -v https://api.example.com/endpoint

// Check logs
grep "ERROR\|Exception" /var/log/app.log | tail -50

Step 4: Isolate the Cause

Narrow down using:

Technique When to Use
Binary search Bug in large codebase, use git bisect
Simplify inputs Bug depends on specific data
Remove components Bug might be in dependencies
Fresh environment Bug might be env-specific

Step 5: Fix and Verify

## Fix

**Root cause:** [What was actually wrong]

**Fix:** [Code change]

**Verification:**
- [ ] Bug no longer reproduces
- [ ] Related features still work
- [ ] Tests pass
- [ ] No new errors in logs

Step 6: Prevent Recurrence

Read the full file on GitHub · 144 lines

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. 1mo ago First seen · 144 lines · 10 tokens per session scan A 26b0a500fefa

Subscribe to this mod's changes

debug-this is a command published in the GitHub repository latestaiagents/agent-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 10 tokens to every session and 824 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.