Reduces SSE event rate ~500/turn → ~20/turn via 50ms text-delta batching in
_dispatch(), which eliminates markdown re-render storms on Open WebUI. Also:
- Trim tool_call.arguments in the response.completed event to 100KB
(prevents silent hangs on 848KB+ single-line SSE events).
- Catch-all exception handlers in _write_sse_responses() + _write_sse_chat_completion()
emit a proper error chunk instead of TransferEncodingError from incomplete
chunked encoding when the agent crashes mid-stream.
- MAX_REQUEST_BYTES 1MB → 10MB; pass client_max_size to aiohttp Application to
avoid silent 400s on truncated request bodies for long conversations.
Salvage of #17552 (api_server portion only). The contrib/openwebui-filter/
payload from that PR — Open WebUI Filter Function + benchmark writeup — is
a client-side user-installable add-on and doesn't need to live in the repo;
dropped here. Closes#17537.
Co-authored-by: bogerman1 <93757150+bogerman1@users.noreply.github.com>
3188e63b05