debug

debug is a skill for Claude Code, Codex from VoTruongDanh/Skills-Agent. It costs 55 tokens per session (969 once invoked), scanned A, original, MIT.

A systematic skill for finding the underlying cause of bugs, failed commands, crashes, error messages, or unexpected behavior.

In plain words
What is it for?
Use it to investigate software failures in user interfaces, servers, databases, security-sensitive code, or general project behavior.
Why use it?
It helps distinguish the real cause from the first visible symptom and records the fix and remaining risks.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

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 skills/votruongdanh/skills-agent/debug
Any agent
npx skills add VoTruongDanh/Skills-Agent --skill debug
Clone the repo
git clone --depth 1 https://github.com/VoTruongDanh/Skills-Agent

Made for: Claude Code, Codex.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/votruongdanh/skills-agent/debug.svg)](https://agentmods.dev/skills/votruongdanh/skills-agent/debug)
Your own site
<a href="https://agentmods.dev/skills/votruongdanh/skills-agent/debug"><img src="https://agentmods.dev/badge/skills/votruongdanh/skills-agent/debug.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 969 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 5.1 $0.00055 $0.00969
Opus 5 $0.00028 $0.00485
Sonnet 5 $0.00011 $0.00194
Haiku 4.5 $0.00006 $0.00097

Measured today against content hash fbe529a8d2a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 today.

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.

.agents/skills/debug/SKILL.md · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Memory Protocol

START: Read .ai-memory.md from project root. Check for known bugs, past fixes, tech stack details, common error patterns, and architecture notes. END: Update .ai-memory.md using Memory Compaction Rules with: bug, root cause, fix, files touched, lessons learned, and remaining risks.

Goal

Find the real root cause, not just the first visible symptom.

Agent Routing

  • If bug is in API/server/backend → read .kiro/skills/agents/agents/backend-specialist.md and apply its knowledge
  • If bug is in UI/rendering/CSS → read .kiro/skills/agents/agents/frontend-specialist.md and apply its knowledge
  • If bug is in database/queries → read .kiro/skills/agents/agents/database-architect.md and apply its knowledge
  • If bug may be a security issue → read .kiro/skills/agents/agents/security-auditor.md and apply its knowledge
  • Default → read .kiro/skills/agents/agents/debugger.md and apply its systematic analysis

Socratic Gate

Before debugging, verify:

  1. What is the expected behavior vs actual behavior?
  2. Is there a log, stacktrace, or error message?
  3. When did this start? (recent change, always broken, intermittent?)
  4. Have we tried this before? If any answer is missing, ASK before proceeding.

Workflow

  1. Read Memory — Load .ai-memory.md for project context and past bug history.
  2. Summarize the bug, expected behavior, and actual behavior.
  3. Gather evidence from logs, stack traces, code paths, config, and recent changes.
  4. List the top hypotheses ranked by likelihood. Eliminate previously failed hypotheses immediately.
  5. Eliminate hypotheses using direct evidence.
  6. Identify the root cause and confirm with evidence before attempting any code changes.
  7. Propose an effective solution that addresses the root cause definitively. Ensure clean code standards are met and fully update all related files.
  8. Suggest how to verify the fix and prevent regressions.
  9. Quality Gate — Read .kiro/skills/_scripts/checklist.md and run cross-cutting quality checks.
  10. Update Memory — Save root cause, fix, and lessons to .ai-memory.md.

Read the full file on GitHub · 82 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. today Changed · +3 lines fbe529a8d2a8
  2. 5d ago First seen · 79 lines · 55 tokens per session scan A 25b11f7497ec

Subscribe to this mod's changes

debug is a skill published in the GitHub repository VoTruongDanh/Skills-Agent (2 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 969 once invoked, about $0.0003 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 2026-08-31.

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