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add-httparchive-metric-report

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Add new metrics to HTTPArchive reports config. USE FOR adding performance metrics, adoption/percentage metrics, or custom metric analysis from crawl data. Chooses timeseries vs histogram based on data type.

QUICK START

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/analysis/add-httparchive-metric-report/SKILL.md

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Adding Metrics to HTTPArchive Reports

Documentation

See reports.md for complete guide including:

  • Architecture and processing details
  • Quick Decision Guide table
  • Required SQL patterns checklist
  • SQL pattern reference (adoption, percentiles, binning)
  • Complete examples
  • Troubleshooting

Quick Start

  1. Open includes/reports.js, find config._metrics (line ~42)
  2. Choose type: Timeseries (adoption/percentiles) or Histogram (distributions)
  3. Add metric with required patterns: date, is_root_page, ${params.lens.sql}, ${params.devRankFilter}, ${ctx.ref('crawl', 'pages')}, GROUP BY client
  4. Run get_errors to verify

Key Rules

  • Boolean/adoption metrics: Timeseries ONLY (histogram meaningless for 2 states)
  • Continuous metrics: Both histogram + timeseries
  • Use safe functions: SAFE_DIVIDE(), SAFE.BOOL() for custom metrics
  • Filter zeros: Add AND metric > 0 before percentile calculations

Minimal Example

metricName: {
  SQL: [
    {
      type: "timeseries", // or 'histogram'
      query: DataformTemplateBuilder.create(
        (ctx, params) => `
        SELECT client, /* your calculations */
        FROM ${ctx.ref("crawl", "pages")}
        WHERE date = '${params.date}' AND is_root_page
          ${params.lens.sql} ${params.devRankFilter}
        GROUP BY client ORDER BY client
      `,
      ),
    },
  ];
}

See reports.md for complete patterns and examples.