databases

databases is a skill for Claude Code from lucaspressi/claudekit-engineer. It costs 42 tokens per session (799 once invoked), scanned A, original, no licence file.

A database development guide for MongoDB and PostgreSQL. It covers schema design, queries, aggregations, indexes, migrations, replication, performance work and the psql command-line tool.

In plain words
What is it for?
Use it to design schemas, write SQL or MongoDB queries, build aggregation pipelines, manage migrations and investigate database performance.
Why use it?
It brings common database design and maintenance tasks together for both a document database and a relational database. This can help when data structures, queries or database operations need review or improvement.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

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/lucaspressi/claudekit-engineer/databases
Any agent
npx skills add lucaspressi/claudekit-engineer --skill databases
Clone the repo
git clone --depth 1 https://github.com/lucaspressi/claudekit-engineer

Made for: Claude Code.

Wrote 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.

agentmods badge for databases

README.md
[![agentmods](https://agentmods.dev/badge/skills/lucaspressi/claudekit-engineer/databases.svg)](https://agentmods.dev/skills/lucaspressi/claudekit-engineer/databases)
Your own site
<a href="https://agentmods.dev/skills/lucaspressi/claudekit-engineer/databases"><img src="https://agentmods.dev/badge/skills/lucaspressi/claudekit-engineer/databases.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 799 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 5.1 $0.00042 $0.00799
Opus 5 $0.00021 $0.00400
Sonnet 5 $0.00008 $0.00160
Haiku 4.5 $0.00004 $0.00080

Measured yesterday against content hash cade02f05984, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

databases 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 yesterday.

The scan reads SKILL.md. This mod also ships 6 executable files (scripts/db_backup.py, scripts/db_migrate.py, scripts/db_performance_check.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.claude/skills/databases/SKILL.md · 84 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 84 lines · 42 tokens per session scan A cade02f05984

Subscribe to this mod's changes

databases is a skill published in the GitHub repository lucaspressi/claudekit-engineer (6 stars, last pushed 6mo ago), with no licence file. It adds 42 tokens to every session and 799 once invoked, about $0.0002 per session on Opus 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 2026-09-04.

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