August 2025 was dedicated to strengthening CI efficiency for pull requests and enhancing build-time safety in starkware-libs/stwo-cairo. The team delivered two high-impact features: (1) CI Workflow Optimization for PRs to reduce unnecessary CI runs by focusing triggers on the synchronize event, speeding up feedback and lowering compute costs; (2) Cairo Verifier - Feature Combination Validation, introducing a module to validate feature combinations and prevent incompatible features from being enabled simultaneously, reducing build/runtime issues and improving stability.

February 2025 focused on stabilizing macro syntax handling in Cairo's parser and formatter. Delivered a bug fix that aligns parsing and formatting logic with macro syntax changes, resolving merge conflicts and ensuring consistent token-tree and macro-declaration handling in both components. Implemented in commit 6dda66aba5b9ebc8dbbb95b36193af07b9830c81 with message "Fix conflicts."