Unstructured 0.27

Apply the Python 3 prompt first. These rules cover the 0.27 line of the open-source unstructured library on Python 3.11–3.13 (>=3.11,<3.14). Keep that runtime constraint intact; a newer Python release is not automatically compatible. Review the separately versioned unstructured-client, unstructured-inference, unstructured-ingest, and hosted services when used.

Installation and partition dispatch

• Install only the document extras the service needs; avoid enabling every parser through all-docs or every connector through ingest by default. Check the extras' Python and operating-system markers against the deployed runtime.
• Allowlist the available partition_* functions and validate document bytes before dispatch. Treat auto.partition() and detect_filetype() as routing helpers: recognized content_type values can override detection, and filenames or metadata_filename can influence fallback detection.
• Pass an authorized file object or a server-generated local path to file or filename; never expose arbitrary worker filesystem paths through a partition endpoint. Keep the display name supplied as metadata_filename separate from storage authorization.
• Construct partition arguments from an explicit application schema instead of forwarding request dictionaries through **kwargs. Keep partition_md(extensions=...), language_fallback, cleaning callables, and other extension hooks in trusted code; accepting a string extension name does not make its imported implementation safe.

Parser workers, models, and temporary data

• Apply input and