Apple 27 compatibility

Apple beta notes mix four different kinds of information: new capabilities, deprecations, active bugs, and resolved bugs. Axint keeps those states separate so a temporary workaround does not become a permanent diagnostic.

Implemented source checks

Area	What Axint checks
SwiftUI `@State`	Declaration-site initialization that conflicts with assignment in `init`, plus extension delegation to synthesized initializers the macro can disable
SwiftUI documents	`FileDocument`, `ReferenceFileDocument`, and reader/writer isolation migrations
`TabView`	A selected path that points at an explicitly hidden tab
Text selection	`.textSelection(.enabled)` next to a competing custom gesture without an explicit priority policy
Toolbar minimization	The renamed `.toolbarMinimizationBehavior(...)` API
Text fields	Migration from soft-deprecated square and rounded border styles to `.bordered`
Foundation Models	Private Cloud Compute code that omits explicit sampling behavior
On Demand Resources	`NSBundleResourceRequest` usage that should move toward Background Assets

The toolbar and text-field migrations have deterministic fixes shared by the CLI and the Xcode Source Editor Extension. The other checks stay advisory because the correct change can depend on project intent.

Current runtime and integration risks

The beta catalog tracks issues that static source cannot decide:

workout audio may not appear through RelevantEntities
Shortcuts “Describe a change” may discard intents containing Duration or LPLinkMetadata
Shortcuts Use Model may fail for some on-device output types
Siri may ignore custom map-schema values
CallKit call starts may fail through phone.startCall
ambiguous OpenIntent and system.open targets may resolve incorrectly
CoreAI models converted with older tooling may need reconversion
pre-beta-3 .aimodelc artifacts may need recompilation

The earlier Private Cloud Compute Simulator limitation is marked resolved. Axint does not continue emitting the old device-only workaround.

Xcode 27 and Swift 6.4

Removed linker path

-ld_classic is an error because Xcode 27 removes ld64 and the classic linker option.

Unique Clang modules

Module-map inspection finds duplicate module names visible to one Swift dependency scan.

Build-server Interface Builder

Simulator compilation mode is reported as an informational migration toward Xcode’s toolchain mode.

Bounded test repetition

Helpers generate swift test --maximum-repetitions ... --repeat-until ... arguments for flaky-test proof.

Stable Xcode remains the strict release path while Xcode 27 is in beta. CI runs the beta toolchain as a forward-looking canary.

App Store Connect API migration

App Store Connect API 4.4.1 introduces version-scoped metadata for in-app purchases, subscriptions, and subscription groups. Axint can detect:

deprecated v1 localization, image, and submission resources
review submission items that reference unversioned commerce objects
age-rating payloads missing socialMedia and socialMediaAgeRestricted

import { analyzeAppStoreConnect441Request } from "@axint/compiler";

const findings = analyzeAppStoreConnect441Request({
  path: "/v1/reviewSubmissionItems",
  body: submissionItem,
});

Verify a checkout

npm test
npm run benchmark:brownfield:check
npm run mcp:production:check
npx tsx scripts/wwdc-diff.ts --snapshot

The nightly SDK scanner is symlink-safe and bounded by depth, file, and entry budgets, so a compatibility link cannot consume the entire monitoring job.