Adding custom REST routes to the FriendsOfRedaxo/api addon (v1.2+) from your own addon — building a RoutePackage subclass, registering routes, scope management, the Body/query schema keys, request-context caveats (auth runs in frontend context, isBackend() returns false, PRE-EPs that call rex::requireUser() fail under Bearer), and the addon's exact-mirror-of-core convention. Use when the user adds endpoints to the api addon, exposes their own data over the same auth/scope mechanism, runs into "EP fires only in backend but I need it from the API" / "rex::requireUser threw" problems, or says "eigene Route registrieren", "API um eigenen Endpunkt erweitern", "RoutePackage bauen".
$npx -y skills add friendsofredaxo/claude-marketplace --skill api-extendingInstalls into the current project.
Run `npx skills use "https://github.com/friendsofredaxo/claude-marketplace" --skill "friendsofredaxo/claude-marketplace/api-extending"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/friendsofredaxo/claude-marketplace" that are relevant to the current task. Run `npx skills add "https://github.com/friendsofredaxo/claude-marketplace"` and select the relevant skills, then follow their instructions.