chDB is an in-process OLAP SQL engine powered by ClickHouse, allowing applications to query analytical data without running a separate database server. Python users and data practitioners use it to work with formats such as Parquet, CSV, JSON, Arrow, and ORC through SQL or a pandas-compatible API. Its catalogue add-ons provide agent instructions, rules, skills, and an agent for working with the project.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/chdb-io/chdbWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/chdb-io/chdb/chdb-ds)<a href="https://agentmods.dev/rules/chdb-io/chdb/chdb-ds"><img src="https://agentmods.dev/badge/rules/chdb-io/chdb/chdb-ds/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/chdb-io/chdb/chdb-ds"><img src="https://agentmods.dev/badge/rules/chdb-io/chdb/chdb-ds.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.00028 |
| Opus 5.5 | $0.00011 | $0.00011 |
| Sonnet 5.5 | $0.00006 | $0.00006 |
| Haiku 4.5 | $0.00003 | $0.00003 |
Grade A, and why
chdb-ds scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
See AGENTS.md for chdb-ds design and testing principles.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 6 lines · 28 tokens per session scan A f2490a382908
chdb-ds is a cursor rule published in the GitHub repository chdb-io/chdb (2,919 stars, last pushed 4d ago), licensed Apache-2.0. It adds 28 tokens to every session, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other cursor rules, from other repositories
architect
Global Architect rules for sandraschi's dev environment (Unity and other integrations, FastMCP, React). See mcp-central-docs integrations.
specs
This directory contains product and tech specs for Streamlit features.
workflows
This folder contains all GitHub Actions workflows for the Streamlit repository. Workflows automate CI/CD, testing, releases, and maintenance tasks.
embedded_skills
Skills under lib/streamlit/.agents/skills/ ship with the library and load from the user's installed Streamlit, so keep them current as features evolve. developing-with-streamlit uses SKILL.md for routing and references/ for topic files. Follow these conventions when adding or editing guidance.
scripts
Utility scripts for development and CI/CD.
JsonModel
This module provides the JsonModel class, a powerful Object-Relational Mapper (ORM)-like interface for storing and querying JSON-style documents within SQLite tables.