# Google Cloud BigQuery agent skills for Claude Code, Cursor and RevampKey

> Ready-made Google Cloud BigQuery playbooks for AI agents: review a BigQuery query for cost before it runs, profile a BigQuery table before you build on it. Free SKILL.md files for Claude Code, Cursor and Codex, or one click in RevampKey.

## Skills

- [Use BigQuery safely with AI](https://revampkey.com/marketplace/bigquery/skills/essentials.md): Gives an AI assistant the habits to query BigQuery well: confirm the project, discover datasets and tables before writing SQL, keep scans and results small, and ask before any change to your data.
- [Review a BigQuery query for cost before it runs](https://revampkey.com/marketplace/bigquery/skills/query-cost-review.md): Checks a SQL statement's scan size, partition and clustering use, wildcard and unbounded scans, and suggests rewrites that reduce bytes processed. It asks before running any large query.
- [Profile a BigQuery table before you build on it](https://revampkey.com/marketplace/bigquery/skills/table-profiling.md): Runs a structured health check on a BigQuery table covering schema, keys, nulls, dates and sample shape, then gives a clear verdict. It stays read-only and uses partition filters and sampling so the check does not run up large scan costs.

## Install

- RevampKey: connect Google Cloud BigQuery at https://revampkey.com/marketplace/bigquery; the skills come with it.
- Any Agent Skills tool, into the current project:

```bash
for s in essentials query-cost-review table-profiling; do
  curl -fsSL --create-dirs -o .agents/skills/bigquery-$s/SKILL.md https://revampkey.com/marketplace/bigquery/skills/$s/SKILL.md
done
```

### What is a Google Cloud BigQuery agent skill?

A SKILL.md file: a short playbook an AI agent loads when your request matches it. Each Google Cloud BigQuery skill describes one job, which Google Cloud BigQuery tools to use in which order, what to check first and when to stop and ask you.

### Do the Google Cloud BigQuery skills change anything on their own?

The others tell the agent to show you the change and wait for a yes before it creates, edits or deletes anything in Google Cloud BigQuery.

### Which tools can use these skills?

Any agent that reads the open Agent Skills format: Claude Code, Cursor, Codex, VS Code with Copilot and RevampKey. In RevampKey they are attached when you connect Google Cloud BigQuery; elsewhere you copy the folders into your project or skills directory.

### Do I need the Google Cloud BigQuery MCP server too?

Yes. The skills tell the agent how to do the work; the Google Cloud BigQuery MCP server gives it the tools to do it. The Google Cloud BigQuery MCP setup guide covers every client.

MCP setup guide: https://revampkey.com/marketplace/bigquery.md