Xcode 27 + Swift 6.4

Track beta changes without turning every release note into a blocker.

Apple beta notes mix new APIs, deprecations, resolved bugs, active bugs, and toolchain migration requirements. Axint maps each relevant item to an implementation status and keeps volatile checks advisory until stronger evidence supports them.

snapshot local SDK

$npx tsx scripts/wwdc-diff.ts --snapshot

toolchain

Xcode 27 canary

language

Swift 6.4

monitor

bounded nightly diff

01

Separate new features from migration risks

The catalog distinguishes active issues, resolved issues, deprecations, and new capabilities. That prevents old beta workarounds from surviving after Apple fixes them and prevents new APIs from being mislabeled as errors.

02

Test against stable and beta toolchains

Stable macOS and Xcode checks remain release gates. Xcode 27, Swift 6.4, future TypeScript, future Python, and current MCP beta clients run as canaries so compatibility work starts before a breaking release reaches everyone.

03

Bound the nightly scanner

SDK discovery is symlink-safe and constrained by depth, file, and entry budgets. A compatibility link or oversized SDK tree cannot consume the entire nightly job without producing a useful diff.

common questions

Are beta diagnostics release blockers?

Not by default. Volatile release-note checks remain advisory unless compiler, test, or runtime evidence confirms the failure.

Does Axint require Xcode 27?

No. Stable supported Xcode remains the strict path; Xcode 27 runs in a compatibility lane while it is in beta.

continue

Put the contract into a real run.