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Agent Skill

Five Whys skill

five-whyswesammustafa/Claude-Code-Everything-You-Need-to-Knowexamples/intermediate/01-first-skill/dot-claude/skills/five-whys/SKILL.md

Finds the root cause of a bug, failure or recurring problem by asking "why" until the answer is a cause you can fix. Use when the user asks why something keeps happening, or wants the root cause rather than a quick fix.

3.5kMIT

always on

52 tokname + description

once used

192 tokSKILL.md body

bundled files

0

repo stars

3.5kGitHub

Install the Five Whys skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/wesammustafa/Claude-Code-Everything-You-Need-to-Know --skill five-whys

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/wesammustafa/Claude-Code-Everything-You-Need-to-Know.git /tmp/Claude-Code-Everything-You-Need-to-Know
mkdir -p ~/.claude/skills
cp -R /tmp/Claude-Code-Everything-You-Need-to-Know/examples/intermediate/01-first-skill/dot-claude/skills/five-whys ~/.claude/skills/five-whys

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description52 tok
When the agent uses itThe SKILL.md instructions192 tok
Only if openedNo bundled files—

Until it is used, five-whys costs about 26× less than the median MCP server we measured (1,363 tokens on every turn). Installing all 8 skills from wesammustafa/Claude-Code-Everything-You-Need-to-Know would load 222 tokens of descriptions. Skills vs MCP study

Checks

Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.

Checked 2026-10-22 · method

More skills from wesammustafa/Claude-Code-Everything-You-Need-to-Know

All skills in this repo
  1. claude-md-reviewwesammustafa/Claude-Code-Everything-You-Need-to-Know

    Audit a CLAUDE.md file for the patterns that actually degrade Claude Code's output — vagueness, unnamed files, stale facts, and bloat. Use when asked to review, audit, improve, shrink, or fix a CLAUDE.md, and when a project's results feel inconsistent or Claude keeps rediscovering the same context.

    3.5k74 tok idle · 816 in use
  2. onboardwesammustafa/Claude-Code-Everything-You-Need-to-Know

    Explains the team's shared Claude Code setup

    3.5k11 tok idle · 5 in use
  3. onboardwesammustafa/Claude-Code-Everything-You-Need-to-Know

    Explains this repository's shared Claude Code setup to a new teammate, covering what is committed and shared, what stays personal, and what the team-kit plugin adds. Use when someone asks how the team's Claude Code setup works or what they get by cloning the repository.

    3.5k56 tok idle · 279 in use