Isn't this just diffing two sitemaps?

The naive version is. This scores every old URL against every new page on three signals, tells you exactly why it matched (or didn't), and the skill catches the synonym cases a lexical script physically cannot — like 'Get in touch' versus 'Contact'. The review step is the product, not an afterthought.

Does it apply the redirects for me?

No. It hands you the reviewed rules in the config format you use — .htaccess, Nginx, or a Cloudflare Bulk Redirects CSV. Applying them is a deploy step you control.

What if the old site is already offline?

You need a URL list, sitemap export, or old crawl captured before it went down. Nothing can reconstruct URLs nobody recorded — the pack says so rather than guessing.

Will you keep it updated?

Updates for 12 months from purchase, delivered through your Gumroad library and logged in a changelog. After that, the version you have keeps working; further updates are not included. Deliberately not a lifetime promise.

Products → Site Migration & Redirects Skill Pack for Claude Code

Site Migration & Redirects Skill Pack for Claude Code

Two Claude Code skills for migrating a site without losing the rankings you built: map old URLs to new ones with a reviewed redirect plan, then verify every redirect actually works after launch. Runs in your editor, needs no SaaS or API key, and costs €49 once.

Get it on Gumroad — €49

v1.0.0 — live. Every script was run end-to-end against real live sites and a real live redirect before release; the worked outputs ship in the download (esempio/).

The problem this solves

Every site migration has the same failure mode: it looks fine in the browser, then weeks later organic traffic is down and nobody can say exactly why. Old URLs that 404 instead of redirecting. Redirect chains that quietly waste crawl budget. Everything unmapped dumped onto the homepage "to be safe" — which search engines read as a soft-404 pattern. Nobody re-checking a few months later, after a server-config cleanup silently drops a redirect that was still catching traffic. You could map and check all of it by hand. On a site with any real size, that's days, and the check never happens a second time.

What's inside

Skill	What it does
`redirect-mapper`	Crawls the old and new site, runs a lexical first-pass match (exact path, same slug, title/heading overlap), then walks you through reviewing every row — including the synonym cases the script can't catch — before generating ready .htaccess / Nginx / Cloudflare Bulk Redirect rules and a 410 list for content that's genuinely gone.
`migration-audit`	Re-crawls the old URLs against the live post-launch site. Flags broken redirects, multi-hop chains, mismatched destinations, and redirects that land on a dead end (noindex/404/wrong canonical). Checks the new site for stray internal links still pointing at old paths. Safe to re-run any time.

Plus two dependency-free Node scripts the skills call, an install guide, and a worked example against a real live site.

What it is not

It does not touch your server, DNS, or CDN config. It hands you reviewed rules for the format you use — you (or your deploy process) apply them.
It is not a guess machine. The matcher has a confidence floor: below it, a URL comes back unmapped instead of a plausible-looking wrong answer.
It is not a SaaS. No account, no API key, no monthly fee. Files in a folder.

Why €49

A migration done wrong costs weeks of recovered rankings, sometimes more. If your time is worth €50 an hour, this pays for itself the first time it replaces one hour of manually diffing two URL lists and re-checking redirects by hand — and a real migration easily costs several hours of that work, done once for the map and ideally again every few months for the check.

What you get

2 skills and 2 helper scripts
Install guide (2 minutes) and a QA checklist showing how each skill was tested
A worked example: a real crawl, a real live redirect check, and a clearly labelled synthetic fixture where a real migration case would otherwise be needed
12 months of updates — a bounded, honest commitment, not "lifetime"
14-day refund, no questions asked, through Gumroad

Requirements

Claude Code (free)
Node.js 18+ for the two helper scripts
No API keys. Nothing phones home.

FAQ

Isn't this just diffing two sitemaps?: The naive version is. This scores every old URL against every new page on three signals, tells you exactly why it matched (or didn't), and the skill catches the synonym cases a lexical script physically cannot — like "Get in touch" versus "Contact". The review step is the product, not an afterthought.
Does it apply the redirects for me?: No. It hands you the reviewed rules in the config format you use — .htaccess, Nginx, or a Cloudflare Bulk Redirects CSV. Applying them is a deploy step you control.
What if the old site is already offline?: You need a URL list, sitemap export, or old crawl captured before it went down. Nothing can reconstruct URLs nobody recorded — the pack says so rather than guessing.
Do I need to know how to code?: No. You need Claude Code installed and Node.js for two helper scripts. You describe the migration in plain English and the skills do the rest.
Will you keep it updated?: Updates for 12 months from purchase, through your Gumroad library and logged in a changelog. After that the version you have keeps working; further updates are not included. Deliberately not a "lifetime" promise.

AI disclosure

The skills are written instructions for an AI coding assistant and were authored with AI assistance. The helper scripts are conventional code. The matcher is built to never report a match below its confidence floor — no invented matches, ratings, or stats anywhere in the product or on this page.

Get it on Gumroad — €49

Companion to the Technical SEO Skill Pack for Claude Code — that one audits and fixes an existing site; this one covers the migration/relaunch moment.