systematic-debugging

systematic-debugging is a skill for Claude Code, Codex from VoDaiLocz/kilo-kit-mcp. It costs 46 tokens per session (1,823 once invoked), scanned A, original, Apache-2.0.

A four-phase method for investigating bugs that are complex, unclear, or resistant to quick fixes. It starts by reproducing the problem and gathering evidence, then traces the system to find where actual behavior differs from expected behavior.

In plain words
What is it for?
Use it to investigate crashes, errors, production incidents, and failures involving multiple components, using logs, stack traces, recent changes, and reproducible test cases.
Why use it?
It helps developers find the real cause instead of repeatedly patching symptoms. It also includes verification steps to reduce the chance of introducing another problem.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to investigate crashes, errors, production incidents, and failures involving multiple components, using logs, stack traces, recent changes, and reproducible test cases.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vodailocz/kilo-kit-mcp/systematic
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.

Any agent
npx skills add VoDaiLocz/kilo-kit-mcp --skill systematic
Clone the repo
git clone --depth 1 https://github.com/VoDaiLocz/kilo-kit-mcp

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 systematic-debugging

README.md
[![agentmods](https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/systematic/github.svg)](https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/systematic)
Your own site
<a href="https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/systematic"><img src="https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/systematic/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 systematic-debugging

Your own site · 80×15
<a href="https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/systematic"><img src="https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/systematic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,823 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Memory Poisoning · line 79
    Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.
    Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
  • medium Excessive Agency · line 305
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00046 $0.01823
Opus 5 $0.00023 $0.00911
Sonnet 5 $0.00009 $0.00365
Haiku 4.5 $0.00005 $0.00182

Measured 9d ago against content hash 887dca52a117, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

systematic-debugging 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 9d 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.

skills/kilo-kit/debugging/systematic/SKILL.md · 340 lines

How it starts

The opening of the file, as written. The whole thing — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🔍 Systematic Debugging Skill

Philosophy: Understand before you fix. Verify before you celebrate.

When to Use

Use this skill when:

  • Bug is not immediately obvious
  • Previous quick fixes have failed
  • Error involves multiple components
  • Need to ensure no regression from fix
  • Production issue requiring careful handling

Do NOT use this skill when:

  • Bug is trivial (typo, missing import)
  • Just need a quick syntax check
  • Issue is really a feature request

Prerequisites

Before starting:

  • Have access to the codebase
  • Can reproduce the bug OR have error logs
  • Understand the expected behavior
  • Know which environment is affected

Process

Phase 1: ROOT CAUSE INVESTIGATION 🔬

Goal: Find the TRUE cause, not just symptoms.

Steps:

  1. Reproduce the Bug

    Ask yourself:
    - Can I make this happen consistently?
    - What are the exact steps?
    - What input causes it?
    
  2. Gather Evidence

    • Error messages (complete, not truncated)
    • Stack traces
    • Relevant logs
    • Recent changes (git log, blame)
  3. Trace the Flow

    Start from: Error location
    Work backward: How did we get here?
    Find: Where does expected != actual?
    
  4. Identify the Root Cause

    • Not "it crashed" but "WHY it crashed"
    • Not "wrong output" but "WHAT produced wrong output"

Output: Clear statement of root cause.

Red Flags (STOP if you find yourself doing these):

  • ❌ Immediately jumping to code changes
  • ❌ Assuming you know the cause without evidence
  • ❌ Changing things randomly hoping they'll work
  • ❌ Ignoring the stack trace

Phase 2: PATTERN ANALYSIS 📊

Goal: Understand the shape of the problem.

Steps:

  1. Scope Assessment

    • Is this isolated or systemic?
    • Does it affect other components?
    • Has this happened before?
  2. Similar Pattern Search

    # Search for similar patterns in codebase
    grep -r "similar_pattern" src/
    

Read the full file on GitHub · 340 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. 9d ago First seen · 340 lines · 46 tokens per session scan A 887dca52a117

Subscribe to this mod's changes

systematic-debugging is a skill published in the GitHub repository VoDaiLocz/kilo-kit-mcp (26 stars, last pushed 4d ago), licensed Apache-2.0. It adds 46 tokens to every session and 1,823 once invoked, about $0.0002 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 2026-09-03.

Related

Other skills, from other repositories