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Clickhouse Best Practices

Official
clickhouse·vlatest·database·Apache-2.0

Optimize ClickHouse performance by implementing recommended configurations, query tuning, and data modeling best practices.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add clickhouse/agent-skills --skill clickhouse-best-practices -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

clickhouse

Matched to the vendor's own GitHub organisation.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill failed 1 of 6 checks. A failure is not proof of bad intent; it means something in the code needs a human to look at it before you run it.

  • No undeclared network calls: failed

    Contacts 2 hosts that are neither well-known infrastructure nor declared in the skill's frontmatter: abc123.clickhouse.cloud, mcp.clickhouse.cloud.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

    Hosts contacted

    mcp.clickhouse.cloudundeclaredabc123.clickhouse.cloudundeclared

    What it found (3 of 6)

    • skills/clickhouse-best-practices/AGENTS.md:1713contacts mcp.clickhouse.cloud
      claude mcp add --transport http clickhouse-cloud https://mcp.clickhouse.cloud/mcp
    • skills/clickhouse-best-practices/AGENTS.md:1726contacts mcp.clickhouse.cloud
      claude mcp add --transport http clickhouse-cloud https://mcp.clickhouse.cloud/mcp
    • skills/clickhouse-best-practices/rules/agent-connect-mcp.md:27contacts mcp.clickhouse.cloud
      claude mcp add --transport http clickhouse-cloud https://mcp.clickhouse.cloud/mcp

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned clickhouse/agent-skills at 2f6ec4b17a.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
2f6ec4b17a
Manifest
skills/clickhouse-best-practices/SKILL.md
Scanned
37 files, 3,959 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill provides best practices for working with ClickHouse, a high-performance columnar database. It includes guidance on query optimization, data modeling, and performance tuning to help users get the most out of their ClickHouse deployments.

When to use it

  • When optimizing complex queries for faster execution times.
  • When designing schemas or tables for large-scale analytics workloads.
  • When troubleshooting slow query performance in a production environment.
  • When preparing documentation or training materials on ClickHouse usage.

Key capabilities

  • Query optimization techniques
  • Data modeling strategies
  • Performance tuning recommendations
  • Schema design best practices

Example prompts

  • "How can I optimize this ClickHouse query for better performance?"
  • "What are the best practices for designing a schema in ClickHouse?"
  • "Can you explain how to tune ClickHouse for high-throughput analytics?"

Tips & gotchas

  • Ensure your ClickHouse version is up to date, as some best practices may change with new releases.
  • Use profiling tools like EXPLAIN and system tables to analyze query performance before applying optimizations.