Windows-specific rules

This is a Windows environment, WSL is not installed (i.e. sed is not available). You're running under PowerShell 7.6.0. Due to platform restrictions, file deletions are not possible. Replacing the entire file content via a context diff is a viable alternative.
PowerShell doesn't support bash-style heredocs. If complex scripts need to be executed, consider using python. Run Python code using python -c with inline commands instead of python - <<'PY'.