Diff Aware Code Generation Mutablediff

via “incremental output file generation with diff-based updates”

Meta-programming for Swift, stop writing boilerplate code.

Unique: Implements diff-based output file writing that compares generated content with existing files and only writes when content has changed, preserving file modification times to avoid triggering unnecessary rebuilds in Xcode and other build systems

vs others: More build-system-aware than naive file writing (which always touches files) and reduces CI/CD pipeline time by avoiding spurious rebuilds, though adds slight overhead for diff comparison