iOS TestFlight with fastlane

Wire one-command TestFlight releases into a native iOS project using fastlane. The result: fastlane beta (or an optional pnpm ios:testflight alias) archives a Release build, computes the next build number, signs, exports an IPA, and uploads it to TestFlight — no manual Xcode archiving and no Apple ID / 2FA prompts.

This skill targets a single app, TestFlight only (not App Store review submission, not CI). It assumes an XcodeGen-based project by default but works for a committed .xcodeproj by deleting one line.

Artifacts to copy

Three concrete, working files live in references/ — copy them and change the marked constants rather than writing from scratch: