Clickhouse Core Workflow B

What it does

When your agent uses it

• Writing analytical queries
• Inserting data at scale
• Building dashboards
• Implementing materialized views for pre-aggregation

Example prompts

• “clickhouse query”
• “clickhouse insert”
• “clickhouse aggregate”
• “/clickhouse-core-workflow-b”

Requirements

• Node.js
• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*)

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Bulk insert (the fast path)
2. 2Analytical queries
3. 3Pre-aggregation and windowing

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Bash(npm:*)

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript and sql).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • clickhouse.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • CLICKHOUSE_PASSWORD

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Clickhouse Core Workflow B loads about 1.3k tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 91 tokens; SKILL.md has 441 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~91

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 441 words, ~1,278 tokens.

name

clickhouse-core-workflow-b

description

Insert, query, and aggregate data in ClickHouse with real SQL patterns. Use when writing analytical queries, inserting data at scale, building dashboards, or implementing materialized views for pre-aggregation. Trigger with "clickhouse query", "clickhouse insert", "clickhouse aggregate", "clickhouse materialized view", "clickhouse SQL".

allowed-tools

Read, Write, Edit, Bash(npm:*)

compatibility

Designed for Claude Code

version

1.7.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

saas, database, analytics, clickhouse, olap

import { createClient } from '@clickhouse/client';

const client = createClient({
  url: process.env.CLICKHOUSE_HOST!,
  username: process.env.CLICKHOUSE_USER ?? 'default',
  password: process.env.CLICKHOUSE_PASSWORD ?? '',
});

// Insert many rows efficiently — @clickhouse/client buffers internally
await client.insert({
  table: 'analytics.events',
  values: events,   // Array of objects matching table columns
  format: 'JSONEachRow',
});

SELECT tenant_id, event_type, count() AS event_count, uniqExact(user_id) AS unique_users
FROM analytics.events
WHERE created_at >= now() - INTERVAL 7 DAY
GROUP BY tenant_id, event_type
ORDER BY event_count DESC
LIMIT 100;

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/.curated/clickhouse-core-workflow-b of jeremylongshore/tons-of-skills-marketplace.

• SKILL.md
• references/advanced.md
• references/queries.md

Open the folder on GitHubat commit cfae287