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Deploy-to-deploy diffs

Know exactly what changed in your website after every deploy.

What changed? Every run diffs against your last baseline—URLs grouped into new regressions and cleared issues, with red/green change lines—not another static audit snapshot. Organize Dev, Test, and Prod as project environments on paid plans. On demand, scheduled, or from GitHub Actions.

Sign in with GitHub — it's free Pricing Install CLI

Temporal diffs

Same sitemap, two moments in time—see additions, removals, and field-level deltas site-wide, not a one-off scorecard.

CI-ready gates

Fail the build when new issues appear between baselines—diff output is the signal, not aggregate counts alone. Set up GitHub Actions.

New vs. resolved

Grouped regressions and clears between runs so triage starts with what crossed the line, not a flat issue list.

Compare #481 → #482 main · release/v3.12
Critical

Deploy diff — meta descriptions stripped at scale

Impact Search snippets fall back to on-page copy or boilerplate until descriptions return—high risk for CTR on product and category URLs.

4 new regressions 1 resolved 3,214 URLs changed
New issue introduced
  • Meta description removed on 3,214 product URLs
  • /pricing now returns 500 (was 200)
Issue resolved
  • Homepage: canonical tag restored (was missing in #481)
Field diff · /products/wireless-charging-pad
Before #481

Baseline

<meta name="description"
  content="Fast 15W Qi charging pad with…" />
After #482

Post-deploy

<meta name="description" />
(empty attribute)
Scenario preview — representative compare-run output
CLI for AI coding tools

Ask Cursor, Copilot, or Claude to run signaldiff.

Your coding tool already has a terminal. Install the CLI, crawl a sitemap locally, and let it read the HTML report—no MCP host to configure. Cloud commands need a paid API key; a local crawl does not.

Windows

irm 'https://signaldiff.dev/install/cli.ps1' -OutFile "$env:TEMP\signaldiff-install-cli.ps1"
& "$env:TEMP\signaldiff-install-cli.ps1"

Linux / macOS

curl -fsSL 'https://signaldiff.dev/install/cli.sh' | bash

Then: signaldiff --sitemap https://example.com/sitemap.xml --output seo-report.html

CLI setup and AI prompt Downloads
terminal
# Linux / macOS
$ curl -fsSL 'https://signaldiff.dev/install/cli.sh' | bash
Installed signaldiff to ~/.local/bin
$ signaldiff --sitemap https://example.com/sitemap.xml --output seo-report.html
Wrote seo-report.html (3,214 URLs)
# Ask your coding tool to read the report