# `session`: Reusable In-Process Conversion Sessions

```{py:currentmodule} myform.session
```

`Session` owns a validated configuration snapshot, configured extension load, and one assist seam.

Requests delegate to one typed reader -> degradation -> writer artifact pipeline.

One-shot public functions construct a disposable session instead of using a second pipeline.

One process-wide, fail-fast guard covers both Session setup (including extension registration) and
every conversion. The public registries, extensions, and writer instances are process-global, so
callers must serialize every Session and one-shot conversion in one Python process.

```{eval-rst}
.. automodule:: myform.session
   :members:
```