Agent Skills › sanjay3290/ai-skills › postgres

postgres

GitHub

提供安全只读SQL查询能力，支持多PostgreSQL数据库连接与智能自动选择。内置读写分离、超时限制及内存保护等安全机制，适用于数据探索、分析及模式检查场景。

skills/postgres/SKILL.md sanjay3290/ai-skills

Trigger Scenarios

执行只读SQL查询探索数据库表结构或Schema 进行数据分析检查数据库内容

Install

npx skills add sanjay3290/ai-skills --skill postgres -g -y

More Options

Use without installing

npx skills use sanjay3290/ai-skills@postgres

指定 Agent (Claude Code)

npx skills add sanjay3290/ai-skills --skill postgres -a claude-code -g -y

安装 repo 全部 skill

npx skills add sanjay3290/ai-skills --all -g -y

预览 repo 内 skill

npx skills add sanjay3290/ai-skills --list

SKILL.md

Frontmatter

{
    "name": "postgres",
    "license": "Apache-2.0",
    "metadata": {
        "author": "sanjay3290",
        "version": "1.0"
    },
    "description": "Execute read-only SQL queries against multiple PostgreSQL databases. Use when: (1) querying PostgreSQL databases, (2) exploring database schemas\/tables, (3) running SELECT queries for data analysis, (4) checking database contents. Supports multiple database connections with descriptions for intelligent auto-selection. Blocks all write operations (INSERT, UPDATE, DELETE, DROP, etc.) for safety."
}

PostgreSQL Read-Only Query Skill

Execute safe, read-only queries against configured PostgreSQL databases.

Requirements

Python 3.8+
psycopg2-binary: pip install -r requirements.txt

Setup

Create connections.json in the skill directory or ~/.config/claude/postgres-connections.json.

Security: Set file permissions to 600 since it contains credentials:

chmod 600 connections.json

{
  "databases": [
    {
      "name": "production",
      "description": "Main app database - users, orders, transactions",
      "host": "db.example.com",
      "port": 5432,
      "database": "app_prod",
      "user": "readonly_user",
      "password": "your-password",
      "sslmode": "require"
    }
  ]
}

Config Fields

Field	Required	Description
name	Yes	Identifier for the database (case-insensitive)
description	Yes	What data this database contains (used for auto-selection)
host	Yes	Database hostname
port	No	Port number (default: 5432)
database	Yes	Database name
user	Yes	Username
password	Yes	Password
sslmode	No	SSL mode: disable, allow, prefer (default), require, verify-ca, verify-full

Usage

List configured databases

python3 scripts/query.py --list

Query a database

python3 scripts/query.py --db production --query "SELECT * FROM users LIMIT 10"

List tables

python3 scripts/query.py --db production --tables

Show schema

python3 scripts/query.py --db production --schema

Limit results

python3 scripts/query.py --db production --query "SELECT * FROM orders" --limit 100

Database Selection

Match user intent to database description:

User asks about	Look for description containing
users, accounts	users, accounts, customers
orders, sales	orders, transactions, sales
analytics, metrics	analytics, metrics, reports
logs, events	logs, events, audit

If unclear, run --list and ask user which database.

Safety Features

Read-only session: Connection uses PostgreSQL readonly=True mode (primary protection)
Query validation: Only SELECT, SHOW, EXPLAIN, WITH queries allowed
Single statement: Multiple statements per query rejected
SSL support: Configurable SSL mode for encrypted connections
Query timeout: 30-second statement timeout enforced
Memory protection: Max 10,000 rows per query to prevent OOM
Column width cap: 100 char max per column for readable output
Credential sanitization: Error messages don't leak passwords

Troubleshooting

Error	Solution
Config not found	Create `connections.json` in skill directory
Authentication failed	Check username/password in config
Connection timeout	Verify host/port, check firewall/VPN
SSL error	Try `"sslmode": "disable"` for local databases
Permission warning	Run `chmod 600 connections.json`