- python-api.md: 'Parts and stream events' section reworks the example
code around response.messages[].parts and drops the old parts=
parameter docs. New 'Prompting with messages' section shows the
user/assistant/system/tool_message helpers, parallel tool calls as
one assistant message, and Attachment-as-positional-arg.
- advanced-model-plugins.md: plugin author guide walks prompt.messages
instead of the old flat prompt.parts + legacy fields. provider_metadata
example no longer passes role= to TextPart; storage reference updated
to message_parts table.
Simon Willison
82b1f4c17a