Over a two-month period, this developer focused on stabilizing and securing CI/CD workflows and core infrastructure across the proconnect-gouv/federation and numerique-gouv/proconnect-identite repositories. Their work involved resolving CI workflow permission issues and hardening Bash scripts to prevent unintended directory changes, using Bash, YAML, and GitHub Actions to improve automation reliability. In the identity service repository, they executed a controlled rollback of Node.js and npm upgrades to restore system stability after upstream changes, carefully documenting the process. These efforts reduced build failures, aligned processes with code scanning requirements, and maintained service availability, demonstrating disciplined change management and technical rigor.