On a 4-file sample Angular project it printed 35 findings (10 errors, 18 warnings, 7 info) from 32 rules, each with file:line and the fix.

Who it’s for
For Angular teams one or more majors behind who have to plan the ng update and tell the lead what breaks first.

What breaks, and when
Angular 18 support ended 2025-11-19, so a project pinned there gets no patches and no security fixes; TestBed.get() was removed in Angular 20.

What you get
• A scanner Claude runs over every .ts, .html and .json file - not a guess from…

See it first
The real output of the bundled example is on getreadystack.com/skills/angular-upgrade-check/ — free, no sign-up, so you see what it finds before you pay.

Install in 30 seconds
Unzip into ~/.claude/skills/, then ask Claude Code: “We’re still on Angular 18 and want to move to the current major. Can you go through the repo and tell me which APIs we use that were removed or deprecated, and whether our version is still supported? Don’t edit anything yet.”. Needs Node 16+.

What it does not do
Reads files only; it does not run ng update, npm install or the Angular compiler.

FAQ
Q: How is this different from asking Claude without the skill?
A: The skill carries a dated rule table and a scanner that reads every file, so Claude quotes the exact date and line instead of guessing from memory.
Q: How do I get the files?
A: In your Whop library after paying: the lesson “angular-upgrade-check.zip”.