postgres

A PostgreSQL command-line client that runs inside Docker. PostgreSQL is a database system for storing and querying structured data.

In plain words
What is it for?
Run SQL queries, migrations, imports and exports, inspect tables and schemas, test connections, and perform database administration.
Why use it?
It lets you work with PostgreSQL databases without installing the client software directly on your computer.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/kubiyabot/skill/postgres-skill
Any agent
npx skills add kubiyabot/skill --skill postgres-skill
Clone the repo
git clone --depth 1 https://github.com/kubiyabot/skill

Made for: Claude Code, Codex.

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,968 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00019 $0.03968
Opus 5 $0.00010 $0.01984
Sonnet 5 $0.00004 $0.00794
Haiku 4.5 $0.00002 $0.00397

Measured 2d ago against content hash dc78e7e2958c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

postgres scanned grade B with 1 finding 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 2d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo apt-get update
examples/docker-runtime-skills/postgres-skill/SKILL.md · 558 lines

How it starts

The opening of the file, as written. The whole thing — 558 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PostgreSQL Skill

Access PostgreSQL databases using the psql CLI client running inside a Docker container. Execute queries, manage databases, run scripts, export/import data, and perform database operations without installing PostgreSQL locally.

Overview

This skill provides the psql command-line client through a containerized runtime. Connect to any PostgreSQL database (local or remote), execute SQL commands, run migration scripts, and manage your databases - all while keeping your host system clean.

When to Use This Skill

Use this skill when you need to:

  • Connect to PostgreSQL databases without local installation
  • Execute SQL queries and commands
  • Run database migration scripts
  • Export and import data (CSV, SQL dumps)
  • List databases, tables, and schemas
  • Inspect table structures and relationships
  • Execute administrative tasks
  • Test database connections
  • Run ad-hoc queries during development

Prerequisites

Docker

The PostgreSQL client runs inside a Docker container:

# macOS (using Homebrew)
brew install --cask docker

# Linux (Ubuntu/Debian)
sudo apt-get update
sudo apt-get install docker.io
sudo systemctl start docker

PostgreSQL Server

You need access to a PostgreSQL server:

  • Local PostgreSQL instance
  • Remote database server
  • Cloud-hosted PostgreSQL (AWS RDS, Google Cloud SQL, Azure, etc.)
  • Docker PostgreSQL container

Configuration

Add to your .skill-engine.toml:

[skills.postgres]
source = "docker:postgres:16-alpine"
runtime = "docker"
description = "PostgreSQL CLI client"

[skills.postgres.docker]
image = "postgres:16-alpine"
entrypoint = "psql"
environment = ["PGPASSWORD=${PGPASSWORD:-}"]
network = "bridge"
memory = "256m"
rm = true

Configuration Explained

  • image: postgres:16-alpine - PostgreSQL 16.x Alpine image (~80MB)
  • entrypoint: psql - PostgreSQL interactive terminal
  • environment: Sets PGPASSWORD from host environment
  • network: bridge - Allows connections to databases (local and remote)
  • memory: 256m - Limits container to 256MB RAM
  • rm: true - Automatically removes container after execution

Read the full file on GitHub · 558 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 2d ago First seen · 558 lines · 19 tokens per session scan B dc78e7e2958c

Subscribe to this mod's changes

postgres is a skill published in the GitHub repository kubiyabot/skill (16 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 19 tokens to every session and 3,968 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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