Cloud changelog: Week of 2026-06-01 (Agent generated)

[Blargian]

Summary

This PR adds Cloud changelog entries for the week of May 26 – June 1, 2026, sourced from the #shipped Slack channel.

Included changes

May 28, 2026:

• ClickStack Cloud — Private preview of fully managed serverless observability on ClickHouse Cloud
• AI Notebooks for Managed ClickStack — Beta: persistent AI-assisted investigation workspaces
• ClickStack MCP Server — OSS release of structured observability tools for external AI agents

May 27, 2026:

• Executable UDFs — Public beta: write Python functions, call them from SQL
• ClickPipes runs natively on GCP — GA with Private Service Connect support
• ClickPipes for GCP Pub/Sub — Private preview
• ClickHouse Agents — Public beta: Claude-powered agentic analytics at ai.clickhouse.cloud
• ClickHouse Postgres — Public beta: fully managed Postgres with native CDC to ClickHouse

May 26, 2026:

• Horizontal Autoscaling — Private preview for Enterprise and Scale tier customers

Needs review

• Open House 2026 announcements (posted by karolina.ruiz.rogelj): A set of features were announced at Open House but explicitly marked as not yet generally available (Cross-Region Replication, Monitoring v2, MV Pipeline Visualization, Schema Management, ClickHouse CLI, Query API Endpoints, AI-Enhanced Query Builder, MCP-as-a-Service). These were excluded from the changelog since they are not shipped yet. Please add any that should be included.
• Executable UDFs: The #shipped post was made on June 1 but the feature was announced at Open House (May 27). Grouped under May 27. Adjust the date if needed.
• Network-access UDFs were mentioned as a private beta alongside Executable UDFs but not broken out separately. Add if warranted.

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This PR was generated automatically by the Cloud changelog bot.

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Note

Low Risk
Documentation-only changelog additions with no runtime or configuration impact.

Overview
Adds three new dated sections at the top of the 2026 Cloud changelog (2026.md), ahead of the existing May 25 entry.

May 28 documents ClickStack Cloud (private preview), AI Notebooks for Managed ClickStack (beta), and the open-source ClickStack MCP Server.

May 27 covers Executable UDFs (public beta), native GCP ClickPipes with PSC, ClickPipes for GCP Pub/Sub (private preview), ClickHouse Agents (public beta), and ClickHouse Postgres (public beta).

May 26 adds horizontal autoscaling (private preview) for Enterprise/Scale on ClickHouse 26.2+.

Each item follows the existing changelog pattern: heading anchors, short product description, and links to blogs, docs, or waitlists.

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Project	Deployment	Actions	Updated (UTC)
clickhouse-docs	Building	Preview, Comment	Jun 1, 2026 4:17pm
clickhouse-docs-jp	Building	Preview, Comment	Jun 1, 2026 4:17pm

3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
clickhouse-docs-ko	Ignored	Preview	Jun 1, 2026 4:17pm
clickhouse-docs-ru	Ignored	Preview	Jun 1, 2026 4:17pm
clickhouse-docs-zh	Ignored	Preview	Jun 1, 2026 4:17pm

[mintlify]

Docs PR opened: ClickHouse/mintlify-docs-dev#101

Added Cloud changelog entries for May 26–28, 2026, covering ClickStack Cloud, Executable UDFs, ClickPipes on GCP, and more.

Once this PR is merged, we'll do a second pass to capture any additional changes and update the docs PR.