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For the complete documentation index for agents and LLMs, see llms.txt.

Release 2026.8

Check August's updates.



Know When Your Pipeline Is Warming Up

Streaming ping events can now include a phase field set to cold_start, which tells you that infrastructure for a newly scaled pipeline replica is still starting up. You can display this state in your client while continuing to ignore ping events as before. For details, see The ping event in Enable Streaming.

Turn Off SSE Keep-Alive Comments for Streaming Requests

Streaming responses periodically send : keep-alive comment lines while a pipeline is idle, so the connection isn't dropped. If your client only parses data: lines and breaks on these comment lines, you can now send the X-Deepset-Stream-Keepalive: off request header on any streaming request to suppress them for that request. Omitting the header, or sending on, keeps the deployment's configured keep-alive behavior unchanged. Sending any other value returns a 400 error.

This header works on the pipeline search-stream and chat-stream endpoints and the deployment search-stream, chat-stream, and chat completions endpoints. For background on streaming responses and event types, see Enable Streaming.

Easier on the Eyes

You can now use the Haystack Platform in dark or light. Click your profile icon and choose your theme: Light, Dark, or System to match your system's settings.

Theme selector

Self-Serve SSO Connections Management

Organization admins can now manage Single Sign-On (SSO) connections directly from Settings > Organization > SSO, without contacting support. Add a connection using a preset for your identity provider (Google Workspace, Okta, Generic OIDC, or Generic SAML), test it before saving, and edit, enable, disable, or delete it at any time. SSO is only visible to organization admins and is available on request. For details, see Enable Single Sign-On (SSO).