Bug Investigator

Bug Investigator is a Quality skill for Claude Code, published by MageByte-Zero in spec-superflow.

759 stars75 forkson MageByte-Zero/spec-superflowAdded 2026/08/23+1% in starsRepository updated 2026/08/16

ai-codingamazon-qclaude-codeclinecodexcopilot-clicursorgemini-cliopencodeopensourceopenspecskillsspec-driven-developmentspec-firstsuperpowerstddtraewindsurfworkflow

Install in seconds

Install Bug Investigator

Copy Bug Investigator into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/MageByte-Zero/spec-superflow/tree/main/skills/bug-investigator ~/.claude/skills/bug-investigator

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/MageByte-Zero/spec-superflow.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/bug-investigator/SKILL.md in MageByte-Zero/spec-superflow
Installs to: ~/.claude/skills/bug-investigator
Collection: One of 9 skills cataloged from this repository
Category: Quality — 1354 skills

What Bug Investigator does

Bug Investigator guides systematic root-cause debugging for bugs, test failures, and unexpected behavior before any fix is proposed. Use it when execution is blocked or the cause is unclear.

Bug Investigator is cataloged under Quality on DirSkills. Bug Investigator comes from a repository tagged ai-coding, amazon-q, claude-code, cline and codex.

Documentation

README

Excerpt

Bug Investigator

Core principle: Find root cause before attempting fixes. Symptom fixes are failure.

The Iron Law

No fixes without root cause investigation first. If you haven't completed Phase 1, you cannot propose fixes.

Use for ANY technical issue: test failures, bugs, unexpected behavior, performance problems, build failures, integration issues. Especially when under time pressure, "one quick fix" seems obvious, you've already tried multiple fixes, or you don't fully understand the issue.

Don't skip because issue "seems simple" or you're "in a hurry" — systematic debugging is faster than thrashing.

The Four Phases

Complete each phase before proceeding.

Phase 1: Root Cause Investigation

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Bug Investigator

What else does MageByte-Zero publish alongside Bug Investigator?
Bug Investigator is one of 9 skills that DirSkills catalogs from MageByte-Zero/spec-superflow, the repository it ships in. Its siblings there include Build Executor, Code Reviewer and Contract Builder. Each one is a separate skill with its own page in this directory, installs the same way Bug Investigator does, and is maintained by MageByte-Zero in that same repository. The rest of the collection is listed on the MageByte-Zero/spec-superflow page.
How does Bug Investigator compare to other Quality skills?
Bug Investigator ranks #1017 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Bug Investigator against them. Open each page to compare what they document and how they install.