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Getting Started

• Read the upgrade surface before the README. v9.0.0 shipped with a one-line changelog (fix method name). That is not enough to plan an upgrade, so the first stop is CHANGELOG.md / UPGRADE.md, then git diff <v8-tag>..v9.0.0 (or the release's compare view) to see the actual rename. Grep your codebase for the old name before anything else — a renamed public method is a fatal error at call time, not a silent one.
• Install with an explicit major constraint: composer require vendor/package:^9.0. Avoid * or dev-main; a one-line note on a major bump is a signal the maintainer under-documents releases, so pinning is your safety net.
• Publish config if provided: php artisan vendor:publish --provider="Vendor\Package\PackageServiceProvider" (or --tag=package-config). Check the published file against the v9 defaults — majors frequently rename or restructure config keys alongside method renames.
• First use case: wire the package into a single feature test before touching production code. Resolve it from the container and exercise the renamed method directly:

it('works against the v9 API', function () {
    $result = app(PackageContract::class)->newMethodName($input);
    expect($result)->toBe(/* ... */);
});

• Where to look first: the package's own tests/ directory. When the changelog is thin, its test suite is the authoritative record of how the current method signatures are actually called.

Implementation Patterns

• Wrap the call site. Put the package behind a small application service or adapter class rather than calling it from controllers and jobs. When a method is renamed again in v10, the change is one file instead of a codebase-wide grep.
• Inject the contract, not the concrete. Constructor-inject or app()-resolve the package's contract; bind it in a service provider. This is what makes the package fakeable in tests and swappable if the rename turns into a deprecation shim you'd rather bypass.
• Feature tests over unit tests. Package behavior usually depends on the Laravel container, config repository, and facades — a unit test that news the class will happily pass while the app fails.
• Use static analysis as the rename detector. Run larastan/phpstan at a high level against the upgraded branch. Call to an undefined method is exactly the error a rename produces, and it surfaces without executing the code path.
• Version-skew guard for multi-app setups: composer why-not vendor/package ^9.0 tells you which of your other dependencies are still pinning the old major. Do this before promising a fleet-wide upgrade.
• Staged rollout: upgrade one app, hold it a release cycle, and only then propagate. A single-line major release rarely has community-written upgrade guides to lean on, so your own notes become the guide for the next app.

Gotchas and Tips

• Resolve the ambiguity of "fix method name" first. It could mean a rename (breaking: old name removed), a correction to an internal/private method (not breaking), or a typo fix in a docblock or string reference (cosmetic). The major version bump suggests the first, but the note does not prove it. Read the diff.
• Don't trust the version number alone to tell you the blast radius. A major bump with a one-line note is the classic signature of a maintainer who doesn't document releases — treat the diff, not the changelog, as the source of truth, and check whether the bump was driven by a PHP/illuminate/* floor raise rather than by the rename at all.
• Clear caches after upgrading. php artisan optimize:clear, and restart PHP-FPM/opcache. A stale facade signature or cached config will make you chase an error that no longer exists in vendor/.
• Watch for a soft-deprecation shim. Some packages keep the old name as a forwarding method in the new major and remove it in the next one. If you see a trigger_error(..., E_USER_DEPRECATED) or a docblock @deprecated, you have been handed a free warning — fix it now, not in v10.
• Regenerate IDE helper files. barryvdh/laravel-ide-helper and similar tools cache facade signatures; after a rename your editor will autocomplete the dead method and flag the live one. Regenerate before you conclude the package is broken.
• Re-verify visibility and signature if you subclassed. If you extended the affected class or overrode the method, a rename plus a visibility change (public → protected) will break you in a way that no composer update output reveals. Check the parent class in src/ directly.
• Pin your own upgrade path. Because the release notes give you nothing, commit a short note in your repo's upgrade log recording which method changed and what you replaced it with. Six months from now that note will be the only documentation that exists.