Traffic Change Diagnosis is a production-ready Claude Code skill (quality score 70/100) in the math-stats sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/traffic-change-diagnosis/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when the user asks "why did traffic drop/spike", investigates an anomaly, or wants to separate tracking regressions from real behaviour changes. Walks a hypothesis tree (measurement → time-shape → channel → cohort → content), recognises common fingerprints (bot spike, tracking regression, deploy-correlated drop, SEO decay, campaign ramp), and applies sample-size discipline.
The Traffic Change Diagnosis skill is built for researchers, data scientists, academics, and analysts working with complex data and scientific literature. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.
mkdir -p ~/.claude/skills/traffic-change-diagnosis curl -L https://claudskills.com/skills/traffic-change-diagnosis/SKILL.md \ -o ~/.claude/skills/traffic-change-diagnosis/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/traffic-change-diagnosis/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/traffic-change-diagnosis/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\traffic-change-diagnosis\SKILL.md on Windows. See the full install guide for step-by-step instructions.
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
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