The Python scripts in mpi-pptx-translate, mpi-pdf-to-docx-conversion, and
mpi-chinese-text-normalize previously required users to type
manually. That is easy to forget and adds friction every time the skill runs.
Switch all four scripts to a shebang,
so they can be invoked directly: . The
PEP 723 metadata blocks remain, so uv still installs the
dependencies automatically. Also made the scripts executable and updated
their usage messages and SKILL.md instructions to match the direct-execution
style.