Build a deterministic SwiftUI Layout from ProposedViewSize, subview measurement, a shared placement plan, evidence-based caching, and accessibility constraints.
Build a minimal Lua 5.4.8 C API boundary with explicit stack contracts, protected calls, controlled libraries, resource ownership, and deterministic shutdown.
Combine Swift Testing, XCTest, a restrained visual matrix, and accessibility review without putting all confidence into fragile snapshots.
Turn a SwiftUI feature into a stable, authorized, and testable App Intent so Shortcuts and system surfaces reuse one domain command.
Treat Python 3.13 free-threaded CPython as an experimental runtime, with explicit installation, extension compatibility, race review, and reproducible benchmarks.