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Skills-Agent: Skill for Claude Code

.agent/skills/debug/SKILL.md

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.

This is VoTruongDanh/Skills-Agent's own configuration. It tells Claude Code and Codex how to work on Skills-Agent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Skills-Agent configures →

not rated 4repo changed 2mo ago A scan 55 tokens original MIT
View source ↗ VoTruongDanh/Skills-Agent
Reuse

Borrowing it

Nothing to install: this file belongs to VoTruongDanh/Skills-Agent. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/VoTruongDanh/Skills-Agent/main/.agent/skills/debug/SKILL.md
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/github.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/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

Your own site · 80×15
<a href="https://agentmods.dev/skills/votruongdanh/skills-agent/debug"><img src="https://agentmods.dev/badge/skills/votruongdanh/skills-agent/debug.svg" alt="Reviewed on agentmods" width="80" 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. 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 $0.00055 $0.00969
Opus 5.5 $0.00022 $0.00388
Sonnet 5.5 $0.00011 $0.00194
Haiku 4.5 $0.00006 $0.00097

Measured 2mo ago against content hash fbe529a8d2a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

.agent/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. 2mo ago Changed · +3 lines fbe529a8d2a8
  2. 2mo 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 (4 stars, last pushed 1mo ago), licensed MIT. It adds 55 tokens to every session and 969 once invoked, about $0.0002 per session on Opus 5.5. 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.

Debugging
Related

debug compared with skills from other repositories

debug next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
debugVoTruongDanh/Skills-AgentSkill41mo agoMITA55Claude Code, Codex
systematic-debuggingopen-metadata/OpenMetadataSkill16kyesterdayApache-2.0A37Claude Code
log-error-digestzebbern/claude-code-guideSkill4.7k3d agoMITA71Claude Code, Codex
cwv-optimizeradobe/skillsSkill319yesterdayApache-2.0A112Claude Code
ci-fixersipyourdrink-ltd/bernsteinSkill1.2kyesterdayApache-2.0A15Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skillsSkill1.9k23d agoMITA36Claude Code
triaging-web-analytics-supportPostHog/posthogSkill41kyesterdaynoneA151Claude Code, Codex