log-debugger

Analyzes log files to identify root causes of errors and crashes.

5|4|Updated Nov 9, 2025
One-click install
npx skills add https://github.com/takusaotome/claude-skills-library --skill log-debugger-takusaotome
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: log-debugger
Source: https://github.com/takusaotome/claude-skills-library/tree/main/skills/log-debugger
Command: npx skills add https://github.com/takusaotome/claude-skills-library --skill log-debugger-takusaotome

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

System and application issues are often hard to diagnose because the true cause is hidden across many log lines, timestamps, and error patterns; this skill helps you systematically analyze logs to identify the root cause and propose corrective and preventive actions.

Core Features & Use Cases

  • Log triage and severity assessment: Aggregates error and warning signals to understand impact and urgency.
  • Pattern recognition for recurring failures: Detects frequent error shapes and common signatures to narrow likely causes.
  • RCA with 5 Whys, timeline analysis, and Fishbone: Reconstructs “what happened” and “why it happened” using structured methods.
  • Actionable resolution and prevention: Produces immediate fixes plus long-term monitoring, validation, and process improvements.

Quick Start

Ask: “Analyze this log and produce a root-cause report with a timeline, top error patterns, and remediation recommendations.”

Frequently Asked Questions about log-debugger

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find the root cause of an error from system logs?

To find the root cause of an error from system logs, you can analyze and parse log files to extract timestamps and severity levels. This process reconstructs incident timelines and applies 5 Whys logic to pinpoint the underlying failure.

Can I analyze JSON and syslog formats for incident debugging?

Yes, you can analyze JSON, plain text, and syslog formats for incident debugging. The parsing mechanism extracts timestamps and error levels from these supported formats to normalize error patterns and correlate multi-source logs across services.

What is the best way to reconstruct a timeline for intermittent failure investigation?

The best way to reconstruct a timeline for intermittent failure investigation is to parse logs sequentially, extracting timestamped events to map out the exact sequence of warnings and errors. This reveals the cascading failures leading to the crash.

Does timeline reconstruction work for correlating multi-source logs across services?

Yes, timeline reconstruction works for correlating multi-source logs across services by normalizing extracted timestamps and error levels. This allows you to aggregate signals from different systems into a unified chronological view for comprehensive root cause analysis.

How do I detect recurring error patterns in application logs?

To detect recurring error patterns in application logs, aggregate and parse the log entries to identify frequent error shapes and common signatures. Recognizing these recurring patterns helps narrow down the likely causes of system crashes.

What RCA methods are used for timeout and performance debugging?

For timeout and performance debugging, the RCA methods used include 5 Whys, timeline analysis, and Fishbone logic. These structured methods help reconstruct what happened and why, producing actionable immediate fixes and long-term preventive actions.