Built-in sandbox SHIM: a pptx (python-pptx) compatible module backed by
com.blockether/imaging (Rust OOXML writer) so from pptx import Presentation
writes real .pptx files without the CPython package — and without Apache POI,
which cannot follow the CLI into the native image.
The Python side owns the whole presentation model and only crosses the
boundary ONCE, at save(): one string-keyed spec map in, base64 bytes out.
Built-in sandbox SHIM: a `pptx` (python-pptx) compatible module backed by `com.blockether/imaging` (Rust OOXML writer) so `from pptx import Presentation` writes real .pptx files without the CPython package — and without Apache POI, which cannot follow the CLI into the native image. The Python side owns the whole presentation model and only crosses the boundary ONCE, at `save()`: one string-keyed spec map in, base64 bytes out.
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