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Compare page speed before and after a release

Lab metrics for your key pages after each production deploy, with each page that got slower.

  • On an event: When a new production deploy finishes
Use in CuiarRun from your AI agent

What it does

The task

Check Netlify for a production deploy of the site site name that finished since the last run. When there is one, run PageSpeed Insights for mobile on each URL in this list: urls. Read the performance score, LCP, TBT, CLS and the page weight. Add a row per URL to the Google Sheet sheet url with the deploy ID. Send me the URLs where LCP is more than 10% slower than in the last row or CLS is above 0.1, with the top 2 fixes from the report.

  • It works in Netlify, PageSpeed Insights and Google Sheets, in the workspace you pick, and signs in with passwords from your Cuiar vault.
  • A routine checks every 15 minutes and acts on what is new: when a new production deploy finishes.

What you give it

BlankWhat to giveExample
site nameThe Netlify site namebrightleaf-marketing
urlsThe pages to test, separated by commashttps://brightleaf.app/, https://brightleaf.app/pricing, https://brightleaf.app/blog
sheet urlThe Google Sheet that keeps the historyhttps://docs.google.com/spreadsheets/d/1SpeedHistory

What you get back

An example run with the example values above. Your run uses your own data.

Deploy 6728c1f of brightleaf-marketing, 4 Nov 15:20. 3 URLs, mobile

URLScoreLCPTBTCLS
/92 (was 94)2.1 s120 ms0.02
/pricing71 (was 89)3.9 s (was 2.4 s)310 ms0.04
/blog882.6 s90 ms0.18 (was 0.05)

Slower: /pricing. Fixes: the hero image is 1.4 MB, and the font CSS blocks rendering.

CLS above 0.1: /blog. Fix: give the newsletter box a fixed height.

Run it in Cuiar

  1. 01

    Open it

    Click Use in Cuiar on this page. The side panel opens with the task in the composer.

  2. 02

    Fill in 3 blanks

    Type site name, urls and sheet url. Tab moves to the next blank.

  3. 03

    Run it, then repeat it

    Run sends it once. To run it when a new production deploy finishes, make a routine on cuiar.com/routines or with the CLI below.

As a routine, from the terminal

cuiar routines create "Compare page speed before and after a release" --schedule "*/15 * * * *" --time-zone Europe/Berlin \
  "Check Netlify for a production deploy of the site brightleaf-marketing that finished since the last run. When there is one, run PageSpeed Insights for mobile on each URL in this list: https://brightleaf.app/, https://brightleaf.app/pricing, https://brightleaf.app/blog. Read the performance score, LCP, TBT, CLS and the page weight. Add a row per URL to the Google Sheet https://docs.google.com/spreadsheets/d/1SpeedHistory with the deploy ID. Send me the URLs where LCP is more than 10% slower than in the last row or CLS is above 0.1, with the top 2 fixes from the report."

Run it from your AI agent

Claude Code, Codex, Cursor and other MCP clients reach Cuiar at https://mcp.cuiar.com/mcp. Add the server one time, then ask for the task in plain words, or call create_routine yourself.

1. Add Cuiar to Claude Code

claude mcp add --transport http cuiar https://mcp.cuiar.com/mcp

2. Ask your agent

Use the Cuiar tool create_routine to run my "Compare page speed before and after a release" template with site name = brightleaf-marketing; urls = https://brightleaf.app/, https://brightleaf.app/pricing, https://brightleaf.app/blog; sheet url = https://docs.google.com/spreadsheets/d/1SpeedHistory.

Setup for other agents: AI agents.

The tool call

{
  "name": "create_routine",
  "arguments": {
    "name": "Compare page speed before and after a release",
    "task": "Check Netlify for a production deploy of the site brightleaf-marketing that finished since the last run. When there is one, run PageSpeed Insights for mobile on each URL in this list: https://brightleaf.app/, https://brightleaf.app/pricing, https://brightleaf.app/blog. Read the performance score, LCP, TBT, CLS and the page weight. Add a row per URL to the Google Sheet https://docs.google.com/spreadsheets/d/1SpeedHistory with the deploy ID. Send me the URLs where LCP is more than 10% slower than in the last row or CLS is above 0.1, with the top 2 fixes from the report.",
    "schedule": "*/15 * * * *",
    "time_zone": "Europe/Berlin"
  }
}

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