In April 2026, Paul Siegel developed a feature for the facebook/pyrefly repository that enables per-workspace Language Server Protocol configuration within VSCode, targeting improved workflows in large, multi-root projects. He implemented end-to-end support for specifying unique config files per workspace using the python.pyrefly.configPath setting, allowing changes to take effect without restarting the LSP server. This involved updating Rust components such as WorkspaceConfigConfigurer and PyreflyClientConfig to dynamically load workspace-specific configurations via ConfigFile::from_file. Leveraging skills in configuration management, Rust, and VSCode extension development, Paul’s work reduced manual reconfiguration and downtime when switching between workspaces in complex codebases.