- Added numerous CLI and SDK enhancements: “pulumi esc” alias, debugging support for source‑based plugins, dependency installation inside plugin folders, and new explain/preview error summarization.
- Expanded language SDKs: NodeJS callSingle, Python scalar call returns, enum references, and a new experimental provider interface; engine now hides undecryptable StackReference outputs.
- Fixed reliability issues: deterministic CI system enumeration, proper handling of plugin handshake errors, and defaulting Python policy installs to virtualenv.